Atrita Pulverizer Products and Services.pdf - APComPower, Inc.

POWER SERVICE

1 

Alstom Power Inc. (Alstom) is recognized 

around the world as a leader in the design, 

manufacturing and servicing of power 

generation equipment. While our heritage 

dates to the late 1800’s, our capabilities 

continue to expand and point us to the future. 

At Alstom, we combine our capabilities and 

experience to enhance the productivity and 

performance of your boilers, pulverizers, 

feeders, air pollution control systems, ash 

handling systems and auxiliary equipment. 

We are an organization that focuses on 

customer service and understand the 

challenges faced by plant owners, operators, 

maintenance personnel and management. 

Whether it is a replacement part, a rebuilt 

assembly, a custom fabrication or inventory 

management program, Alstom provides value 

and service to the customer.

Table of Contents 

Introduction to the ATRITA® Mill ................................................................................................3 

ATRITA Mill Capacities ................................................................................................................4 

The Alstom Advantage ................................................................................................................5 

Technical Services ......................................................................................................................6 

Inventory Management Programs..............................................................................................8 

Outage Kits ................................................................................................................................9 

Alstom Service and Distribution Centers ..................................................................................10 

Rebuild/Repair Services ............................................................................................................11 

R 3 Component Rotation Programs ............................................................................................11 

ATRITA Rebuild and Repair Services ..........................................................................................12 

Complete Rotor Assemblies and Rebuilds ................................................................................12 

Performance and Availability Upgrades for ATRITA Mills ........................................................13 

Robotic Double Weld Overlay Hammers ................................................................................13 

CT4 White Iron Alloy Castings ..................................................................................................14 

Star-Tip Tungsten Carbide Products ......................................................................................15 

Ship Lapped First Effect Wear Plates ......................................................................................16 

Vacuum Bonded Ceramic Lined Fan Blades ............................................................................17 

Vacuum Bonded Ceramic Lined Fan Housing Side Liners........................................................18 

Reaction Bonded Silicon Carbide Periphery Fan Liners ............................................................19 

Bolt Head Protectors ................................................................................................................20 

Replacement Parts for ATRITA Mills ..........................................................................................21 

Hammer, Peg and Clip Quantities ..........................................................................................22 

Crusher Section Parts List ........................................................................................................23 

Grinding Section Parts List........................................................................................................25 

Fan Section Parts List ..............................................................................................................27 

Rotor Assembly Section Parts List ............................................................................................29 

Asset Planning and Life Cycle Worksheet ................................................................................31 

Rotor Assembly Rebuild Customer Information Sheet..............................................................33 

Notes Page..................................................................................................................................34 

2

Introduction to the ATRITA ® Mill 

3 

Introduction to the ATRITA ® Mill 

ATRITA pulverizers are manufactured by 

Riley Power Inc. They are high-speed mills 

that operate from 900 rpm for the larger 

machines to 1800 rpm for the smallest 

machines. They are designed to pulverize a 

wide range of fuels such as bituminous, 

sub-bituminous, lignite, coke, and some 

industrial by-products. 

There are two standard ATRITA pulverizer 

arrangements. A “single” type consists of a 

crusher, a pulverizer, an internally 

adjustable classifier and a fan section. A 

“duplex” mill combines two single ATRITA 

mills to form a “duplex” machine. The 

capacity ratings for the duplex are double 

those of a single ATRITA mill of the same 

size. ATRITA capacity ranges from 7000 

lb/hr for a 350 single mill to 70,000 lb/hr 

for the 558 Duplex mill. Duplex ATRITA 

pulverizers began with the 550 single and 

larger mills. Smaller sized pulverizers were 

not designed as duplex mills. 

The majority of the existing ATRITA 

pulverizers consist of three sections: 

1) crusher section 

2) grinding section 

3) classifier and fan section 

Each is mounted on the same 

horizontal shaft. 

ATRITA is a registered trademark of Riley Power Inc. 

Each section is designed for a specific task 

during the pulverization process. All sizes 

feature the same pulverizer component 

sections that perform the same function, 

just varying in size and throughput. The 

ATRITA mill is driven with a single motor 

that is coupled to the shaft either with 

a direct drive high torque motor or 

through a clutch. For most units, this is 

a centrifugal style clutch that allows for 

a slower start up. 

ATRITA mills provide the advantage of 

having a complete pulverizer mounted on 

one shaft all driven by a single motor. 

While the frequency of required 

maintenance is greater than other 

pulverizer designs, the overall out of service 

time is less and doesn’t require specialized 

tooling or rigging. For some ATRITA sizes, 

many of the wear parts are 

interchangeable. Utility boilers were 

often supplied with a spare mill to 

maintain boiler output during a mill outage. 

ATRITA mills have a relatively small 

rotating mass that enables shorter start 

up times. They can also be brought on line 

and removed from service quickly because 

of the no coal reservoir design. Overall, 

the simple design and operational logic 

make the ATRITA pulverizer easy to operate 

and maintain.

ATRITA Mill Capacities 

COAL AIRFLOW AIRFLOW 

FAN FAN CAPACITY CAPACITY CAPACITY 

MILL SETTINGS SIZE (LB/HR) (A/F 1.1) (A/F 1/3) 

550S A 63 12900 14190 16770 

B 70 14500 15950 18850 

C 77 16000 17600 20800 

550S-E E 84 16000 17600 20800 

550D A 63 25800 28380 33540 

B 70 29000 31900 37700 

C 77 32000 35200 41600 

550D-E E 84 32000 35200 41600 

552S A 63 13270 17250 19900 

B 70 17200 18920 22360 

C 77 19000 20900 24700 

554D A 70 44000 48400 57200 

B 77 44000 48400 57200 

C,F 84 44000 48400 57200 

556S A 70 27000 29700 35100 

B 77 27000 29700 35100 

C,F 84 27000 29700 35100 

556D A 70 54000 59400 70200 

B 77 54000 59400 70200 

C,F 84 54000 59400 70200 

558S A 70 30000 33000 39000 

B 77 30000 33000 39000 

C,F 84 30000 33000 39000 

558D A 70 60000 66000 78000 

B 77 60000 66000 78000 

C,F 84 60000 66000 78000 

A=MINIMUM FAN BLADE SETTING / B= MIDDLE FAN BLADE SETTING 

C=MAXIMUM FAN BLADE SETTING / F=FORWARD CURVE FAN BLADE 

4 

Introduction to the ATRITA ® Mill – Capacities

The Alstom Advantage 

5 


100 Years of Experience 

+ 

Solution-based Products & Services 

+ 

Commitment to Customer Service 

= 


Alstom provides reliable delivery of products 

and services to meet the demands of the 

power industry. We are a dedicated customer 

service organization that delivers the 

responsiveness our customers require. 

Alstom provides the quality and resources 

of an OEM while backing our products 

with comprehensive support. Our products 

are designed to help our customers meet 

the performance, availability and 

reliability requirements for their power 

plant equipment. 

Markets Served 

Our experience and customer base include: 

• utility companies 

• regional electric cooperatives 

• federal, municipal power producers 

• independent power producers 

• pulp and paper companies 

• industrials such as chemical plants, 

steel mills and refineries 

In other words, if you generate steam 

to produce power or to support your 

manufacturing processes, Alstom is 

ready to provide the products and 

services you need. 

Equipment Supported 

In addition to Alstom equipment, we serve 

the following brands: 

Steam Generators 

ABB, Combustion Engineering, 

Babcock & Wilcox, Riley, and Foster Wheeler 

Coal Pulverizers 


Babcock & Wilcox, Riley ATRITA®, 

Foster Wheeler 

Air Pollution Control 

ABB, Combustion Engineering, Fläkt, 

Walther, Carborundum, Hamon Research- 

Cottrell, Wheelabrator, Peabody, Rockwell 

Ash Handling Systems 


Allen-Sherman-Hoff, United Conveyor, Fläkt 

Stokers 

ABB, Combustion Engineering, Detroit Stoker, 

Riley, Westinghouse, Hoffman, Taylor 

Coal Feeders 


Stock Equipment, Merrick Industries 

Firing Systems 

ABB, ICL, NEI, Clark Chapmun, CSL

Technical Services 

Alstom’s Technical Services capabilities cover 

major plant equipment and systems and 

include: 

• outage planning 

• equipment inspections 

• condition assessments 

• operational support 

We are a global provider of products and 

services to the power industry. We maintain 

a local presence to help ensure that our 

customers’ equipment and systems run 

reliably and efficiently with the availability 

they demand. We are: 

• A team of over 100 field-based engineers 

and technicians 

• Problem solvers 

• Equipment inspectors, testers, 

and evaluators 

• Performance specialists 

Field Technical Service Engineers 

Alstom has extensive capabilities in the 

form of Field Technical Service Engineers to 

assist with your outage inspection and 

maintenance needs. 

Our field service engineers are located near 

our customers to provide the response they 

need. This full time force of professionally 

trained engineers and technicians receives 

constant training to help ensure they are 

knowledgeable in the latest trends and 

available technology. 

They are backed by our engineering 

groups with years of experience in 

designing new units as well as upgrading 

existing equipment. 

Outage Planning 

Effective outages require effective planning, 

a continuous process that begins well in 

advance of the scheduled event. Alstom 

stands ready to participate in this process to 

help ensure timely decisions, problem 

avoidance, and achieved goals. 

The services Alstom provides include: 

• Setting overall outage objectives 

• Work scope determination 

• Prioritization of outage tasks 

• Identification of material and parts needs 

• Expediting delivery of required material 

and parts 

Inspection Service 

To help ensure an effective outage, we offer 

our Inspection Service that includes: 

• Pre-outage logistics and work 

scope definition 

• Pre-outage unit walk-downs 

• Detailed inspections during the outage 

• Daily punch lists and definition of items 

requiring immediate attention 

• Coordination with repair labor personnel 

• Initial report with critical findings 

and recommendations 

• Final detailed inspection report complete 

with photos, recommendations and findings 

• On-line retrieval (via our website) of 

our final report for convenient viewing 

and downloading 

6 

The Alstom Advantage – Technical Services

The Alstom Advantage – Technical Services 

7 

Maintenance Support Service 

To help ensure your equipment performs to 

your expectations, we offer our Maintenance 

Support Service whereby we: 

• Determine equipment condition and need 

for repairs 

• Compare components to original 

specifications and help make adjustments 

• Participate in developing work scope and 

associated tasks 

• Direct maintenance personnel in proper 

disassembly and assembly procedures 

• Coordinate execution of the work scope 

• Develop a daily punch list prioritizing 

work tasks 

• Provide a final report documenting work 

performed and recommendations 

Dedicated Engineer Program 

We provide an experienced Alstom Technical 

Services Engineer for exclusive use for a 

specific time period. 

The Dedicated Engineer becomes an on-site 

member of the plant team spearheading the 

Alstom support. The result is responsive 

service in determining root causes to 

problems and timely development and 

implementation of solutions to help reach and 

exceed station goals.

Inventory Management Programs 

With our proven inventory management 

expertise, purchasing strength and 

strategically located regional service centers, 

participation in an Alstom Inventory 

Management Program can offer customers 

significant benefits – from guaranteed 

shipments to improved cash flow. 

Advantages 

• After hours response team 

• Guaranteed parts availability 

• Eliminates exposure to obsolete inventory 

• Applicable to most plant equipment 

• Programs can be expanded to include other 

plants within the customer’s system 

• One week standard shipment after 

receipt of order 

• Minimizes exposure to raw materials 

price fluctuations 

Benefits to User 

• Reduces carrying costs 

• Defers cash outlay 

• Increases cash flow by delivering products 

when needed 

• Simplifies purchasing 

Improves cash flow 

and guarantees 

parts availability 

8 

The Alstom Advantage – Inventory Management Programs

The Alstom Advantage – Outage Kits 

9 

Outage Kits 

Outage Kits are pre-packaged supplies of 

equipment-specific replacement parts that 

support planned or unexpected unit outages 

and rebuilds. Emergencies cost money! 

Outage Kits can help minimize costly delays 

in making repairs. 

Outage Kits are the perfect solution when 

emergencies strike, or to have available as 

part of a planned preventative maintenance 

cycle or Inventory Management Program. 

Advantages 

• Custom or standard kits 

• Reduces maintenance costs 

• Convenient and organized 


• Right parts available when you need them 

• Pay for the parts that are used 

• Instant part availability 

• Save time and money 

• Simplifies purchasing 

How Alstom’s Outage Kit Program works: 

The customer 

and Alstom 

develop a list 

of parts to be 

included in 

each kit. 

Alstom then 

ships these 

parts in 

pre-packaged 

kit form to the 

customer two 

weeks prior to 

the planned 

outage or 

rebuild. 

Customer 

withdraws 

parts from the 

kit, as needed. 

A cost-effective way 

to manage planned 

and unplanned unit 

outage repairs 

Items not 

needed from 

any given kit 

are shipped 

back to 

Alstom for 

re-stocking. 

The customer 

then issues a 

purchase 

order to 

Alstom for 

any parts 

consumed.

Alstom Service and Distribution Centers 

Alstom’s Service Center network, strategically 

located across the country, provides 

emergency component repairs, parts, 

complete component overhauls, custom 

US Headquarters 

Service Centers 

Locations 

• Suwanee, Georgia 

• Erlanger, Kentucky 

• Tyler, Texas 

• Harrisburg, Pennsylvania 

• Denver, Colorado 

• Chattanooga, Tennessee 

(Tubing Distribution Center) 

Denver, CO 

fabrications, and cost saving inventory 

management programs to meet our 

customers’ needs. 

Tyler, TX 

Erlanger, KY 

Suwanee, GA 

Chattanooga, TN 

Harrisburg, PA 

Windsor, CT 

Strategically located 

to serve our customers 

10 

The Alstom Advantage – Alstom Service and Distribution Centers

The Alstom Advantage – Rebuild / Repair Services • R 3 Component Rotation Programs 

11 

Rebuild/Repair Services 

As a leading supplier of quality power 

plant equipment and replacement parts, 

Alstom offers one of the industry’s most 

complete and cost-effective rebuild and 

repair services. 

Alstom’s rebuild/repair services include 

component inspections and maintenance, 

replacement of worn parts and design 

upgrades. These offerings, which include 

extended warrantees, can reduce inventory 

costs by 25-35% and result in longer lasting 

products that save power producers money. 

Advantages 

• All work is done in a controlled environment 

using the latest technology 

• All work is done to engineering 

specifications 

• R 3 Component Rotation Programs are 

available to fit your outage schedule 

• Extensive parts inventory to support 

rebuilds/repairs 

• OEM inspection, rebuilding, and testing 

procedures are used 

• Component upgrades available 


• Customer inventory reduction 

• All work backed by Alstom’s 

engineering experience, quality 

and reliability 

• Shorter lead times 

Save up to 50% versus 

purchasing new 

R 3 Component 

Rotation Programs 

Alstom offers customers a systematic method 

for rebuilding boiler related equipment and 

returning this equipment to service. Alstom’s 

Regional Service Centers are the focus of this 

program combining our extensive experience, 

inventory, rebuild portfolio and proven 

processes to provide a unique service. 

The R 3 program is based on Rebuilding, 

Restocking and Replacing components. 

Rebuild 

Complete disassembly and inspection of a 

component. Worn out parts are replaced and 

components repaired. The components are 

rebuilt to strict procedures and tolerances. 

Upgrades to components can be included. 

Restock 

Once a rebuild is completed, the component 

is placed in the customer’s exclusive stock 

inventory at the Regional Service Center 

nearest the plant. 

Replace 

Rebuilt components are returned to a 

customer when needed to replace a similar 

component requiring service. The replaced 

component is sent back to the Service Center 

for rebuilding and restocking. 

R 3 = 

Rebuild+Restock+Replace 

~ 

Improving availability 

while reducing cost

ATRITA Rebuild and Repair Services 

Complete Rotor Assemblies and Rebuilds 

Alstom can supply new Rotor Assemblies or 

rebuild existing assemblies incorporating 

upgrades to address operational or 

performance issues. 

Alstom understands the demands placed on 

plant operators to keep their pulverizers 

operating at peak performance. Coupled 

with the reality of greater spans between 

outages and shorter outages, efficient and 

timely equipment maintenance programs 

are vital. 

Alstom’s Rotor Rebuild Programs, tailored 

to customer requirements, follow a proven 

process that includes disassembly and a 

thorough inspection of all components. 

Worn out parts are replaced or repaired as 

appropriate, and upgrades included when 

specified. All repairs, reassembly and 

dynamic balancing are performed to 

strict tolerances and procedures. 

The result is a piece of equipment returned 

to as-new condition and backed by a 

comprehensive warranty. 

Additionally, Alstom stands ready to work 

with owners of ATRITA Pulverizers to 

design a rotor spares program that meets 

their specific goals. 

Rebuild Scope 

• Disassemble 

• Visual inspection 

• A check of the shaft run out and shaft 

critical dimensions 

• Magnetic particle inspection of shaft, 

grinding rotor hubs and fan hubs 

• A detailed inspection report and 

rebuild quotation 

• Replacement or repair of all worn 

components 

• Assembly of the rotating parts to the shaft 

• Dynamic balancing per ISO 1940/1 G2.5 

• Packaging and shipment of complete 

assembly 


• Reduced cost versus new equipment 

• Shorter lead time 

• Immediate availability of rotor 

components 

• Reduced outage time associated with 

rotor assembly failure 

12 

ATRITA Rebuild and Repair Services – Complete Rotor Assemblies and Rebuilds

Performance and Availability Upgrades for ATRITA Mills – Robotic Double Weld Overlay Hammers 

13 

Performance and Availability 

Upgrades for ATRITA Mills 

Alstom continues to design and develop 

products for ATRITA mills that will meet the 

changing needs of our customers. Our 

performance and availability upgrades can 

help when looking at fuel switching and the 

changing environmental regulations. Alstom 

provides solutions to improve fineness, 

provide longer wear life, reduce 

maintenance costs, eliminate a number of 

mechanical problems and improve the 

overall reliability of your mill. 

Robotic Double Weld 

Overlay Hammers 

The Alstom weld overlay is a chromium 

carbide base electrode applied to the 

standard swing hammers that significantly 

increases wear life. This corrosion and 

erosion resistant overlay contains a 

chromium carbide content greater 

than 18%, resulting in 60-62 Rockwell C 

hardness that makes it capable of handling 

severe impact applications. 

Advantages 

• Significantly more erosion resistant than 

the standard hand-applied overlay 

• Weld can be applied to standard 

manganese hammers 

(existing customer inventory) 

• Robotic application ensures 

part uniformity 


• Up to double the operational wear life – 

longer periods between hammer 

replacements 

• Less component wear downstream 

• Longer component service life throughout 

the mill 

• Improved fineness resulting in less 

unburned carbon 

Double the life and improved coal fineness

CT4 White Iron Alloy Castings 

CT4 is a white iron alloy with a high 

chromium content used in: 

• Wear plates 

• Crusher blocks 

• Breaker plates 

• Periphery liners 

• Fan blades 

• Fan bolt guards 

CT4 is engineered to resist abrasion and 

erosion in high wear areas of the mill. 

Proprietary heat treating results in superior 

hardness and toughness, and produces a 

part that is less brittle, thus reducing the 

risk of cracking during installation. In 

addition, longer wear means better grinding 

capacity and fineness for longer periods of 

time resulting in an overall improvement in 

mill operation and performance. 

Advantages 

• Superior wear 

• Superior toughness 

• Less brittle resulting in less cracking 

during installation 


• Extended operational life 

• Longer periods between 

part replacements 

• Better coal fineness resulting in less 


Wear Plates 

Crusher Block 

Breaker Plate 

Improved coal fineness and capacity 

over a longer period 

14 

Performance and Availability Upgrades for ATRITA Mills – CT4 White Alloy Casting

Performance and Availability Upgrades for ATRITA Mills – Star-Tip Tungsten Carbide Products 

15 

Star-Tip Tungsten Carbide Products 

Star-Tip Products, consisting of stationary 

pegs, grinding clips and rejector arms, 

provide thicker tungsten carbide tiles on the 

component face plus additional tiles 

installed on the impact side of the 

component. The tungsten carbide tile 

used in Star-Tip Products is a mixture of 

fine and course grains producing an 

excellent combination of toughness 

and wear resistance. 

Additional tiles brazed on the impact side 

prevents wear 

Erosion patterns on parts made from 

standard materials 

Features 

• Tungsten carbide tiles brazed on the 

impact side 

Advantages 

• Significantly extends the operational wear 

life of the components 

• Improves fuel grindability on both the 

first and second effect side of the 

grinding section 


• Longer component service life throughout 

the mill 

• Improved fineness resulting in less 


Now standard for: 

• Impeller clips 

• Grinding clips 

• Stationary pegs 

• Rejector arms

Ship Lapped First Effect Wear Plates 

Alstom has redesigned the standard first 

effect wear plates to an overlap or ship 

lapped design. This design eliminates the 

gap between the wear plates and redirects 

the wear from the rotor disc to the wear 

plate itself. 

Advantages 

• Direct replacement for the original design 

first effect wear plates 

• Cast from CT4 abrasive resistant material 

to extend component life 

• Eliminates wear between the wear plates 

that occurs with the original design 


• Eliminates costly weld repair to the 

rotor disc 

• Eliminates costly “shaft out” maintenance 

needed to replace the rotor disc 

Eliminates costly repair 

and maintenance 

of the rotor disc 

16 

Performance and Availability Upgrades for ATRITA Mills – Ship Lapped First Effect Wear Plates

Performance and Availability Upgrades for ATRITA Mills – Vacuum Bonded Ceramic Lined Fan Blades 

17 

Vacuum Bonded Ceramic Lined Fan Blades 

Ceramic lining is the best wear solution for 

high erosion, low impact locations. 

Alstom’s DYNAWEAR Products provide 

this solution. 

Features 

• Abrasion resistant ceramics – 

(DYNAWEAR II Product) affixed to a 

fabricated fan blade 

• Tungsten carbide on leading and trailing 

edges available 

• High wear areas (webs and corners) 

reinforced with ceramic tile 

Advantages 

• Significantly outlast traditional castings 

• Direct replacements for cast fan blades 


• Extended operational life of fan blades 

• Reduced maintenance costs 

Extending fan blade life 

while reducing maintenance costs

Vacuum Bonded Ceramic Fan Housing Side Liners 

Alstom provides high wear fabricated fan 

housing side liners with ceramic tiles 

bonded to a steel fabrication. Liners 

fabricated in this manner will significantly 

outwear conventional cast liners. 

Features 

• Abrasion resistant ceramics – 

(DYNAWEAR II Product) bonded to a 

fabricated steel plate 

• Liners can be installed along side 

conventional castings 

Advantages 

• Significantly outlast traditional castings 

• Direct replacements for existing castings 

• Design enables customer to mix ceramic 

fan liners with castings in the same 

fan section 


• Extended operational life 

• Reduced maintenance costs 

Direct replacement with longer life 

18 

Performance and Availability Upgrades for ATRITA Mills – Vacuum Bonded Ceramic Fan Housing Side Liners

Performance and Availability Upgrades for ATRITA Mills – Reaction Bonded Silicone Carbide Periphery Fan Liners 

19 

Reaction Bonded Silicone Carbide Periphery Fan Liners 

Reaction bonded silicon carbide ceramic 

offers excellent wear resistance while 

exhibiting increased fracture toughness. 

This material is recommended for 

applications at temperatures below 

450° F and is well suited for applications 

that experience erosion due to high 

velocity impingement such as coal and 

ash handling components. 

Advantages 

• Excellent fracture toughness 

• Resistant to high velocity 

erosive impingement 

• Direct replacement for cast liners 


• Greatly reduces fan section 

maintenance and costs 

• Greater than double the operational wear 

life of standard cast liners 

More than twice the life of standard cast liners

Bolt Head Protectors 

Bolt head protectors designed by Alstom are 

easily installed to protect the crusher rotor 

assembly fasteners during operation. 

Advantages 

• Provides fastener protection in the 

crusher section 

• Easily installed 

• Prevents bolt head wear during operation 

Benefit to User 

• Prevents costly mill crashes due to 

bolt head erosion 

Simplest way to prevent costly mill crashes 

20 

Performance and Availability Upgrades for ATRITA Mills – Bolt Head Protectors

Replacement Parts for ATRITA Mills 

21 

Replacement Parts for ATRITA Mills 

All part numbers in this section are for reference only. 

Please verify with your Alstom representative before ordering.

Hammer, Peg and Clip Quantities 

IMPELLER CLIP GRINDING STATIONARY PEG HAMMER 

MILL CLIPS ROWS CLIPS PEGS FILLERS ROWS 

550S 18 or 36 1 or 2 36 or 72 36 or 72 0 2 

550S-E 18 or 36 1 or 2 36 or 72 36 or 72 0 2 

550D 36 or 72 2 or 4 72 or 144 72 or 144 0 2 

550D-E 36 or 72 2 or 4 72 or 144 72 or 144 0 2 

552S 18 2 72 54 or 72 18 or 0 3 

554D 36 4 144 144 0 3 

556S 42 1 42 48 0 3 

556D 84 2 84 96 0 3 

558S 84 2 84 96 0 3 

558D 168 4 168 192 0 3 

22 

Replacement Parts for ATRITA Mills

Replacement Parts for ATRITA Mills – Crusher Section 

23 

Crusher Section Parts List

Crusher Section Parts List 

550 550E 552 

Feed Inlet Side Liner - RH GP-12564 GP-13204 GP-12327 

Feed Inlet Side Liner - LH GP-12564 GP-13205 GP-12326 

Tramp Metal Impact Plate GP-12563 GP-12563 Upon Request 

Tramp Metal Guide Plate Upon Request GP-10727 Upon Request 

Housing Side Liner for Crusher GP-11643 GP-11643 GP-11643 

Hammer Pin GP-10292 GP-10292 GP-10292-A 

Hammer Cotter Pin MD8-00039-NH MD8-00039-NH MD8-00039-NH 

Housing Side Liner - Breaker Plate - RH GP-12565-A GP-12565-A GP-13433 

Housing Side Liner - Breaker Plate - LH GP-12600 GP-12600 GP-13432 

Swing Hammer - Standard GP-10291 GP-10291 GP-10291 

Swing Hammer - Robotic Double Weld Overlay GP-10291-2RWELD GP-10291-2RWELD GP-10291-2RWELD 

Breaker Plate GP-10840-A GP-10840-A N/A 

Breaker Plate - Half Section N/A N/A GP-12067-A 

Adjusting Screw for Crusher Block GP-101 GP-101 GP-101 

Grid Filler Block - Front GP-10730-A GP-10730-A GP-11445-A 

Grid Filler Block - Rear GP-10731-A GP-10731-A GP-11443-A 

Grid Support GP-10671 GP-10671 GP-10671 

Grid Segment Slotted GP-10825-B GP-10825-B GP-11444-B 

Grid Segment Solid GP-10826-B GP-10826-B GP-11446-B 

Side Liner - Lower Housing - Crusher Chamber GP-11642 GP-11642 GP-11642 

Front Access Door - Crusher Chamber, Lower Housing Upon Request Upon Request Upon Request 

Crusher Block GP-10503-X GP-10503-X GP-10503-A 

Crusher Block Side Support - RH GP-11634-A GP-11634-A GP-11634-A 

Crusher Block Side Support - LH GP-11635-A GP-11635-A GP-11635-A 

554D 556 558 

Feed Inlet Side Liner - RH GP-12327 GP-13204 Upon Request 

Feed Inlet Side Liner - LH GP-12326 GP-13205 Upon Request 

Tramp Metal Impact Plate Upon Request GP-12563 Upon Request 

Tramp Metal Guide Plate Upon Request GP-10727 Upon Request 

Housing Side Liner for Crusher GP-11643 GP-11643 GP-11643 

Hammer Pin GP-10292-A GP-10292-A GP-10292-A 

Hammer Cotter Pin MD8-00039-NH MD8-00039-NH MD8-00039-NH 

Housing Side Liner - Breaker Plate - RH GP-13433 GP-13433 GP-13433 

Housing Side Liner - Breaker Plate - LH GP-13432 GP-13432 GP-13432 

Swing Hammer - Standard GP-10291 GP-10291 GP-10291 

Swing Hammer - Robotic Double Weld Overlay GP-10291-2RWELD GP-10291-2RWELD GP-10291-2RWELD 

Breaker Plate - Half Section GP-12067-A GP-12067-A GP-12067-A 

Adjusting Screw for Crusher Block GP-101 GP-101 GP-101 

Grid Filler Block - Front GP-11445-A GP-11445-A GP-11445-A 

Grid Filler Block - Rear GP-11443-A GP-11443-A GP-11443-A 

Grid Support GP-10671 GP-10671 GP-10671 

Grid Segment Slotted GP-11444-B GP-11444-B GP-11444-B 

Grid Segment Solid GP-11446-B GP-11446-B GP-11446-B 

Side Liner - Lower Housing - Crusher Chamber GP-11642 GP-11642 GP-11642 

Front Access Door - Crusher Chamber, Lower Housing Upon Request Upon Request Upon Request 

Crusher Block GP-10503-A GP-10503-A GP-10503-A 

Crusher Block Side Support - RH GP-11634-A GP-11634-A GP-11634-A 

Crusher Block Side Support - LH GP-11635-A GP-11635-A GP-11635-A 

24 

Replacement Parts for ATRITA Mills – Crusher Section

Replacement Parts for ATRITA Mills – Grinding Section 

25 

Grinding Section Parts List

Grinding Section Parts List 

550 (LH) 550 (RH) 550E-D (LH) 

Periphery Liner GP-11508-A GP-10729-A GP-11508-A 

Periphery Liner Insert GP-10817 GP-10817 GP-10817 

Liner & Inserts Assembled GP-12440 GP-12439 GP-12440 

Periphery Locking Liner GP-12070-A GP-12071-A GP-12070-A 

Locking Liner Insert GP-10819 GP-10819 GP-10819 

Locking Liner & Inserts Assembled GP-12439-A GP-12440-A GP-12439-A 

Peripheral Liner Locking Plate GP-13935 GP-13935 GP-13935 

Impeller Clip GP-10302-T GP-10302-T GP-10795-T 

1st Effect Wear Plate - Outer GP-12777-A GP-12776-A GP-12777-A 

1st Effect Wear Plate w/ ext. GP-12778-A GP-12779-A GP-12778-A 

1st Effect Wear Plate Inner GP-11637-A GP-11637-A GP-11637-A 

2nd Effect Wear Plate - Outer GP-10793-C GP-10792-C GP-10793-C 

2nd Effect Wear Plate Inner GP-11638 GP-11638 GP-11638 

Grinding Clip GP-10303-LH GP-10303-RH GP-10303-LH 

Stationary Peg GP-10501-LH GP-10501-RH GP-10501-LH 

Rejector Arm (Check length of Arm) GP-10502-LH GP-10796-LH GP-10502-RH GP-10796-RH GP-10502-LH GP-10796-LH 

Rejector Arm Guard GP-10477 GP-10477 GP-10477 

Cheek Plate (Check # of Pegs) GP-10806-X GP-10806-A GP-10806-AA GP-10806-X GP-10806-A GP-10806-AA GP-10806-X GP-10806-A GP-10806-AA 

550E-D (RH) 552 (LH) 552 (RH) 



Liner & Inserts Assembled GP-12439 GP-12440 GP-12439 

Periphery Locking Liner GP-12071-A GP-12070-A GP-12071-A 


Locking Liner & Inserts Assembled GP-12440-A GP-12439-A GP-12440-A 

Peripheral Liner Locking Plate GP-13935 GP-13935 GP-13935 



1st Effect Wear Plate w/ ext. GP-12779-A GP-12778-A GP-12779-A 

1st Effect Wear Plate Inner GP-11637-A GP-11637-A GP-11637-A 

2nd Effect Wear Plate - Outer GP-10792-C GP-10793-C GP-10792-C 

2nd Effect Wear Plate - Outer N/A GP-13631-A* GP-13629-A* 


Grinding Clip GP-10303-RH GP-10303-LH GP-10303-RH 

Stationary Peg GP-10501-RH GP-10501-LH GP-10501-RH 

Rejector Arm (Check length of Arm) GP-10502-RH GP-10796-RH GP-10502-LH GP-10796-LH GP-10502-RH GP-10796-RH 


Cheek Plate (Check # of Pegs) 

* Single Clip Wear Plate 

GP-10806-X GP-10806-A GP-10806-AA GP-10806-X GP-10806-A GP-10806-AA GP-10806-X GP-10806-A GP-10806-AA 

554 (LH) 554 (RH) 556 (LH) 



Liner & Inserts Assembled GP-12440 GP-12439 Upon Request 

Periphery Locking Liner GP-12070-A GP-12071-A GP-12802 


Locking Liner & Inserts Assembled GP-12439-A GP-12440-A Upon Request 

Peripheral Liner Locking Plate GP-13935 GP-13935 Upon Request 



1st Effect Wear Plate w/ ext. GP-12778-A GP-12779-A N/A 

1st Effect Wear Plate Inner GP-11637-A GP-11637-A GP-12805 

2nd Effect Wear Plate - Outer GP-10793-C GP-10792-C GP-11323-A 


Grinding Clip GP-10303-LH GP-10303-RH GP-10303-LH 

Stationary Peg GP-10501-LH GP-10501-RH GP-10501-LH 

Rejector Arm (Check length of Arm) GP-10502-LH GP-10796-LH GP-10502-RH GP-10796-RH GP-10519-LH GP-10673-LH 


Cheek Plate (Check # of Pegs) GP-10806-X GP-10806-A GP-10806-AA GP-10806-X GP-10806-A GP-10806-AA GP-12976 GP-12976-A 

556 (RH) 558 (LH) 558 (RH) 



Liner & Inserts Assembled Upon Request Upon Request Upon Request 

Periphery Locking Liner GP-12803 GP-12802 GP-12803 


Locking Liner & Inserts Assembled Upon Request Upon Request Upon Request 

Peripheral Liner Locking Plate Upon Request Upon Request Upon Request 



1st Effect Wear Plate w/ ext. N/A N/A N/A 

1st Effect Wear Plate Inner GP-12805 GP-12805 GP-12805 

2nd Effect Wear Plate - Outer GP-11324-A GP-12758-A GP-12909-A 


Grinding Clip GP-10303-RH GP-10303-LH GP-10303-RH 

Stationary Peg GP-10501-RH GP-10501-LH GP-10501-RH 

Rejector Arm (Check length of Arm) GP-10519-RH GP-10673-RH GP-10519-LH GP-10673-LH GP-10519-RH GP-10673-RH 


Cheek Plate (Check # of Pegs) GP-12976 GP-12976-A GP-12976 GP-12976-A GP-12976 GP-12976-A 

26 

Replacement Parts for ATRITA Mills – Grinding Section

Replacement Parts for ATRITA Mills – Fan Section 

27 

Fan Section Parts List

Fan Section Parts List 

550 (LH) 550(RH) 550E (LH) 550E (RH) 

Nozzle Cut Off Section GP-12055 GP-12055 GP-12055 GP-12055 

Nose Piece for Discharge Nozzle GP-13087 GP-13087 GP-13087 GP-13087 

Fan Housing Liner @ Discharge Upon Request Upon Request Upon Request Upon Request 

Fan Housing Liner Transformation Piece GP-13053 GP-13053 GP-12054 GP-12054 

Fan Housing Peripheral Liner - Upper & Lower GP-13052 GP-13052 GP-11761 GP-11761 

Fan Housing Peripheral Liner Spacer Upon Request Upon Request GP-11761-A GP-11761-A 

Rejector Ring Segment 60 Deg. GP-11641 GP-11641 GP-11640 GP-11640 

Rejector Ring Support Upon Request Upon Request GP-11365 GP-11365 

Fan Blade - Forward Curved - Cast Upon Request Upon Request Upon Request Upon Request 

Fan Blade - Cast - Shrouded Fan GP-11390-A GP-11507-A GP-11390-A GP-11507-A 

Fan Blade Angle GP-10827-A GP-10827-A GP-10827-A GP-10827-A 

Fan Blade Protector Upon Request Upon Request Upon Request Upon Request 

Fan Blade Filler Upon Request Upon Request Upon Request Upon Request 

Fan Blade - Cast - Shrouded Fan Upon Request Upon Request Upon Request Upon Request 

Fan Blade - Cast GP-10297-A GP-10296-A GP-10297-A GP-10296-A 

Fan Blade Ceramic Lined - Unshrouded GP-10300 GP-10301 Upon Request Upon Request 

Fan Blade - Ceramic Lined - Shrouded GP-10800-A GP-10809-A Upon Request Upon Request 

Bolt Head Protectors Upon Request Upon Request Upon Request Upon Request 

Fan Blade Inner Upon Request Upon Request Upon Request Upon Request 

Fan Blade Forward Curved - Shrouded Upon Request Upon Request Upon Request Upon Request 

552 (LH) 552 (RH) 554D (LH) 554D (RH) 



Fan Housing Liner @ Discharge Upon Request Upon Request GP-12274 GP-12274 



Fan Housing Peripheral Liner Spacer Upon Request Upon Request GP-11761-A GP-11761-A 

Rejector Ring Segment 60 Deg. GP-11640 GP-11640 GP-11640 GP-11640 

Rejector Ring Support Upon Request Upon Request GP-11365 GP-11365 

Fan Blade - Forward Curved - Cast Upon Request Upon Request Upon Request Upon Request 

Fan Blade - Cast - Shrouded Fan GP-12448-A GP-12451-A GP-11390-A GP-11507-A 

Fan Blade Angle GP-10827-A GP-10827-A GP-10827-A GP-10827-A 

Fan Blade Protector GP-12449-A GP-12452-A GP-12391-A GP-12392-A 

Fan Blade Filler GP-12450-A GP-12453-A GP-12450-A GP-12453-A 


Fan Blade - Cast Upon Request Upon Request Upon Request Upon Request 

Fan Blade Ceramic Lined - Unshrouded Upon Request Upon Request Upon Request Upon Request 

Fan Blade - Ceramic Lined - Shrouded Upon Request Upon Request GP-11507-CER GP-11390-CER 

Bolt Head Protectors Upon Request Upon Request GP-10803-A GP-10803-A 

Fan Blade Inner Upon Request Upon Request Upon Request Upon Request 

Fan Blade Forward Curved - Shrouded Upon Request Upon Request Upon Request Upon Request 

556 (LH) 556 (RH) 558 (LH) 558 (RH) 



Fan Housing Liner @ Discharge GP-12274 GP-12274 GP-12274 GP-12274 



Fan Housing Peripheral Liner Spacer GP-11761-A GP-11761-A GP-11761-A GP-11761-A 

Rejector Ring Segment 60 Deg. Upon Request Upon Request Upon Request Upon Request 

Rejector Ring Support Upon Request Upon Request Upon Request Upon Request 

Fan Blade - Forward Curved - Cast GP-11760-A GP-11759-A GP-11760-A GP-11759-A 


Fan Blade Angle GP-13005-A GP-13005-A Upon Request Upon Request 

Fan Blade Angle GP-10827-A GP-10827-A Upon Request Upon Request 

Fan Blade Protector Upon Request Upon Request Upon Request Upon Request 

Fan Blade Filler Upon Request Upon Request Upon Request Upon Request 


Fan Blade - Cast Upon Request Upon Request Upon Request Upon Request 

Fan Blade Ceramic Lined - Unshrouded Upon Request Upon Request Upon Request Upon Request 

Fan Blade - Ceramic Lined - Shrouded GP-10800-A GP-10809-A Upon Request Upon Request 

Fan Blade - Ceramic Lined - Shrouded GP-10799 GP-10807 Upon Request Upon Request 

Bolt Head Protectors GP-10803-A GP-10803-A Upon Request Upon Request 

Fan Blade Inner GP-13004-A GP-13003-A Upon Request Upon Request 

Fan Blade Forward Curved - Shrouded GP-12380-A GP-12380-A Upon Request Upon Request 

28 

Replacement Parts for ATRITA Mills – Fan Section

Replacement Parts for ATRITA Mills – Rotor Assembly Section 

29 

ADJUSTABLE REJECTOR ARM FLANGE 

SECOND EFFECT INNER LINER PLATE 

Rotor Assembly Section Parts List 

CRUSHER ROTOR SPACER 

GRINDING ROTOR DISC 

CENTER 

CRUSHER 

ROTOR 

CRUSHER ROTOR 

GRINDING CHAMBER 

ROTOR HUB 

ROTOR HUB LOCKNUT 

EXPANSION 

HUB 

FAN WHEEL 

FAN WHEEL HUB 

FAN HUB LINER 

FAN WHEEL SHROUD

Rotor Assembly Section Parts List 

550S 550D 550E-D 552S 554 

Main Shaft GP-14209* GP-14210* GP-12415 GP-14209* GP-14210* 

Main Shaft GP-13353 Upon Request GP-14210* GP-13241 GP-12930 

Main Shaft GP-13089 Upon Request Upon Request Upon Request Upon Request 

Main Shaft GP-13395 Upon Request Upon Request Upon Request Upon Request 

Crusher Rotor GP-13392 Upon Request GP-13392 GP-13243 GP-12889 

Center Crusher Rotor GP-13393 Upon Request Upon Request GP-13243-A GP-12889-A 

Crusher Rotor Spacer Upon Request Upon Request Upon Request GP-13238 GP-12892 

Expansion Hub GP-13394 Upon Request Upon Request GP-13242 GP-12893 

Grinding Rotor Disc - RH Upon Request GP-12401 GP-12401 GP-12401 GP-12401 

Grinding Rotor Disc - LH Upon Request GP-12400 Upon Request GP-12400 GP-12400 

Grinding Chamber Rotor Hub GP-13350 Upon Request Upon Request GP-13244 GP-12896 

Rotor Hub Locknut MP-3391 Upon Request Upon Request MP-3391 GP-12895 

2nd Effect Inner Liner Plate GP-11743-A GP-11743-A Upon Request GP-11743-A GP-11743-A 

Adjustable Rejector Arm Flange GP-13351 Upon Request Upon Request GP-13239 GP-12890 

Fan Wheel Upon Request Upon Request Upon Request GP-13246 GP-12912 

Fan Wheel Shroud Upon Request Upon Request Upon Request GP-13247 Upon Request 

Fan Wheel Hub GP-13344 Upon Request GP-12953 GP-13240 GP-12888 

Fan Hub Liner GP-12894 Upon Request GP-12894 GP-12894 GP-12894 

Shipping Frame (shown on pg. 12) GP-TL-00002 GP-TL-00001 GP-TL-00001 GP-TL-00002 GP-TL-00001 

* Generic, Forged, Stepped, Premachined Shaft 

There are many variations of rotor assemblies. Verification of a plant specific design is required prior to fabrication and assembly. 

(Refer to Rotor Assembly Rebuild Information Sheet). 

556S 556D 558S 558D 

Main Shaft GP-14209* GP-14210* GP-13522 GP-13460 

Main Shaft GP-13642 GP-12974 GP-14209* GP-14210* 

Crusher Rotor GP-13243 GP-12947 GP-13243 GP-12947 

Center Crusher Rotor GP-13243-A GP-12947-A GP-13243-A GP-12947-A 

Crusher Rotor Spacer GP-13238 GP-12949 GP-13238 GP-12949 

Expansion Hub GP-13242 GP-12948 GP-13242 GP-12948 

Expansion Hub Upon Request GP-13771 Upon Request Upon Request 

Grinding Rotor Disc - RH GP-12955 GP-12955 GP-12955 GP-12955 

Grinding Rotor Disc - LH GP-12954 GP-12954 GP-12954 GP-12954 

Grinding Chamber Rotor Hub GP_13344 GP-12951 GP-13244 GP-12951 

Rotor Hub Locknut MP-3391 GP-12956 MP-3391 GP-12956 

2nd Effect Inner Liner Plate GP-12891 GP-12891 GP-12891 GP-12891 

Adjustable Rejector Arm Flange GP-13351 GP-12952 GP-13239 GP-12952 

Fan Wheel GP-13796 GP-12957 GP-12956-A GP-13427 

Fan Wheel Shroud GP-13797 GP-12958 GP-12958 GP-13428 

Fan Wheel Hub GP-13240 GP-12953 GP-13240 GP-12953 

Fan Hub Liner GP-12894 GP-12894 GP-12894 GP-12894 

Shipping Frame (shown on pg. 12) GP-TL-00002 GP-TL-00001 GP-TL-00002 GP-TL-00001 

* Generic, Forged, Stepped, Premachined Shaft 

30 

Replacement Parts for ATRITA Mills – Rotor Assembly Section

Asset Planning and Life Cycle Worksheet: ATRITA Pulverizer 

31 

Asset Planning and Life Cycle Worksheet: ATRITA Pulverizer

Contact Alstom to arrange 

an ATRITA planning workshop. 

Note: This worksheet is available in larger sizes for planning purposes. 

32 

Asset Planning and Life Cycle Worksheet: ATRITA Pulverizer

ATRITA Rebuild and Repair Services – Rotor Assembly Rebuild Customer Information Sheet 

33 

ROTOR ASSEMBLY REBUILD 

CUSTOMER INFORMATION SHEET 

Company:_______________________________________________ 

Plant:_________________________________________________ 

Contact:________________________________________________ 

Phone:__________________ Email:_________________________ 

Address:____________________________________________________ 

____________________________________________________ 

____________________________________________________ 

Model and Size of Mill _____________________________________ 

(Single Mill) Motor On: Crusher Side or Fan Side 

Designation: RH or LH 

(Duplex) Feed: Center Feed or Outside Feed 

Rotation from Drive End (Circle one): CW CCW 

Fan Blade Type and P/N ___________________________________ 

Fan Wheel P/Ns: _______________ _______________ 

Fan Shroud P/N: _______________ 

Fan Hub P/N: _______________ 

Fan Hub Liner P/N: _______________ 

Number of Hammers in 

Crusher Section (Circle one) 20 30 

Number of Stationary Pegs: ______________________ 

Number of Grinding Clips: ______________________ 

Rejector Arm P/N: ______________________ 

Signature Date 

______________________________________________________ 

Return to: Customer Services 

Phone: 866.257.8664 • Fax: 860.285.3101 

Email: windsorparts@power.alstom.com

World’s Leading Supplier of Coal Pulverizer Parts and Services 

Specializing in: 

• Extended time between overhauls 

• Increased machine performance 

• Improved fineness 

• Increased flow 

• Reduced pressure drop 

• Reduced power consumption 

NOTES: 

34 

Alstom – The World’s Leading Supplier of Coal Pulverizer Parts and Services

Alstom Power Inc. 

2000 Day Hill Road 

Windsor, CT 06095-0500 

Tel: 860.285.5400 

Fax: 860.285.9611 

www.service.power.alstom.com 

ATRITA is a registered trademark of Riley Power Inc 

PSE/BPROS/TRTPVZ09/eng/PS1/04.09/US/6875 

© 2009 Alstom Power Inc. 06095. Alstom, the Alstom logo and any alternative version thereof are trademarks and service marks of Alstom. The other names mentioned, registered or not, are the property of their respective companies. This 

document is submitted in confidence and is to be used solely for the purpose for which it is furnished. Any technical and other data contained in this document is provided for information only. Neither Alstom nor its officers or employees accept 

responsibility for or should be taken as making any representation, warranty or guarantee (whether expressed or implied) as to the accuracy or completeness of such data or the achievement of any projected performance criteria where these are 

indicated. Alstom reserves the right to revise or change this data at any time without further notice. .

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