M50 • L50 Series Multistage Regenerative Turbine ... - MTH Pumps

Page M-1
MTH PUMPS
M50 • L50 Series
Multistage Regenerative Turbine Pumps
• Capacities to 40 GPM
• Heads to 2300 Feet
• Single or Multi-stage Units (up to 5 stages)
• Vertical Close Coupled
• Horizontal Close Coupled
• Horizontal Flexible Coupled
M50 • L50 SERIES PUMPS
Vertical base mount and horizontal
pedestal mounted multi-stage
regenerative turbine pumps
represent the most economical high
performance alternative for low flow
(2 to 38 GPM) applications involving
moderate to high pressures (heads to
2300 feet).
By combining the latest concepts
in hydraulic turbine pump design
with precision computer controlled
manufacturing, M50 Series pumps
deliver high efficiency operation
even at low NPSH. Costs are
controlled by efficient manufacturing
processes, use of standard motors,
and highly optimized pump designs.
Maintenance costs are kept to a
minimum by combining an easily
serviceable design with the use of
high quality components to provide
long life.
Water Passage Design
MTH masters one of the most critical
design considerations of regenerative
turbine pumps - the shaping of
water passageways to achieve
maximum capacity and pressure
while minimizing horsepower
requirements. By optimizing water
passageway cross-sectional profiles
for each impeller, MTH improves both
efficiency and pressure in the M50
Series, and exceeds the standards
realized by previous techniques.
Impeller Profile
One of the most notable
improvements in regenerative turbine
pump technology, incorporated in
M50 Series pumps, involves the
ability to determine the optimum
impeller width and blade length.
These factors have a significant
effect on the required horsepower
versus pressure curve for
regenerative turbine pumps. By
optimizing these for each pump,
peak efficiency is improved and “off
peak” horsepower requirements are
reduced as well.
Impeller Blades
After the most favorable impeller
profile has been determined for a
particular water passageway crosssection,
MTH calculates the number
of blades needed to maximize the
performance of that pump. The
blade design in M50 Series pumps
increases both efficiency and design
pressure without incurring the
manufacturing difficulties associated
with producing contoured blade
impellers. State-of-the-art computer
controlled machines simplify
manufacturing of the various MTH
impellers utilized in the M50 Series.
The result is a high performance
pump providing efficiency
characteristics exceeding those of
much more expensive units.
NPSH Requirements
M50 Series regenerative turbine
pumps meet low net positive suction
head (NPSH) requirements without
efficiency loss. This is achieved
by keeping the inlet fluid velocity
low and then gently accelerating
to passageway velocities. Special
ramps are responsible for this
gentle fluid entry into the impeller
blades and account for the high inlet
efficiency of the M50 Series pumps.
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-2
MTH PUMPS
M50 • L50 Series
Multistage Regenerative Turbine Pumps
M50 • L50 SERIES PUMPS
Low NPSH Requirements
L50 Series regenerative turbine
pumps have exceptionally low NPSH
requirements, making them ideally
suited for applications where very
little inlet head is available.
STANDARD MATERIALS
This reduced NPSHR provided by the
L50 Series is obtained by using a first
stage centrifugal style impeller with
inlet flow paths shaped to maintain a
constant fluid velocity. This reduces
entry losses to the impeller as well
as maintaining efficiency. A multivane
diffuser is used in conjunction
PART
BRONZE
FITTED ALL IRON ALL BRONZE
STAINLESS
STEEL
Inlet Cover Cast Iron
ASTM A48
Cast Iron
ASTM A48
Bronze
ASTM B62
Stainless Steel
AISI 316
Outlet Cover Cast Iron
ASTM A48
Cast Iron
ASTM A48
Bronze
ASTM B62
Stainless Steel
AISI 316
Impeller
Bronze
ASTM B62
Carbon Steel
12L14
Bronze
ASTM B62
W88
ASTM A494
Shaft
Stainless Steel
AISI 416
Stainless Steel
AISI 416
Stainless Steel
AISI 316
Stainless Steel
AISI 316
“O” Rings Buna N Buna N Buna N Viton A
Seals Buna/Ceramic Buna/Ni-Resist Buna/Ceramic Viton/Ceramic
Engineering Specifications
M50 • L50 SERIES
The contractor shall furnish (and install
as shown on the plans) an MTH (M50)
(L50) Series (horizontal) (vertical base
mount) close coupled (horizontal
pedistal mounted) regenerative turbine
type pump model _____ size ____ of
(BRONZE FITTED) (ALL IRON) (ALL
BRONZE) (316 STAINLESS STEEL)
construction. Each pump shall have
a capacity of ___GPM when operating
at a total head of ___feet. Suction
pressure will be ___feet with a liquid
temperature of ___degrees F.
The pump is to be furnished with a mechanical
seal with stainless steel metal
parts, (Buna) (EPR) (Teflon) (Viton)
elastomers, (ceramic) (ni-resist) (silicon
carbide) (tungsten carbide) seat and
carbon washer. Pump will have shaft
sleeve or stainless steel shaft which will
prevent pumped fluid from contacting
motor shaft.
The L50 Series pump shall be low
NPSHR inducer style design with a centrifugal
radial vane design impeller and
a multi-vane diffuser for balancing radial
loads. The pump shall be vertically split
design with replaceable external channel
rings that have water passageways
accurately machined into each ring. The
suction and discharge will have (NPT)
(SAE) (BSP) (ISO) threads located in
the top vertical position for self-venting
and shall be cast separately from one
another. The impeller(s) shall be hydraulically
self-centering and no external
adjustment shall be necessary.
The close coupled pump shall be mounted
to a standard NEMA __HP __phase
__Hertz __volt __RPM (horizontal) (vertical),
(open drip proof) (totally enclosed)
(explosion proof) motor. Each pump
shall be tested at the specified capacity
and head prior to shipment. The motor
shall be sized to prevent overloading at
the highest head condition listed in the
specifications.
with the centrifugal impeller for
balancing radial loads and extracting
the maximum pressure from the first
stage. Pressure and flow produced
by the NPSH inducer assures
that the succeeding stages are
adequately fed.
LIMITATIONS
Discharge Pressure
1000 PSI
Seal Pressure*
200 PSI
Suction Pressure (Min.) 26” Hg Vac.
Speed
3600 RPM
Temperature
Standard Construction
-20°F
Ceramic Seal Seat - Water 230°F
Silicon Carbide Seal Seat &
External Seal Flush 250°F
Horsepower
C3 - P3
1/3 to 3 HP
C30 - P30
5 to 30 HP
*Suction Pressure Plus a Percentage of
Differential Pressure
The pedistal mounted pump shall be
mounted on a bearing pedestal with
sealed, grease lubricated ball bearings
having a two year minimum design life
under a maximum pump differential pressure
of 1000 PSI, and the shaft shall be
of 416 stainless steel material. Pump
and motor shall be mounted on a common
steel baseplate, flexible coupled
with coupling guard to a standard horizontal
NEMA __HP __phase __Hertz
__volt __RPM (open drip proof) (totally
enclosed) (explosion proof) motor. Coupling
alignment shall be checked after
installation. Each pump shall be tested
at the specified capacity and head prior
to shipment. The motor shall be sized to
prevent overloading at the highest head
condition listed in the specifications.
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-3
M50 • L50 SERIES
Performance Curves
2400
M50 • L50 Series
3450 RPM
2000
5
7 1 /2
10
HEAD IN FEET
3
1600
3
5
2
3
1200
2
3
5
3 3
2
2
5 5 800
1 1 /2
1 1 1 2
/2
1 1 2 3
/2
5
3
1
1 1 /2
3
/4
1 1 /2
400
3
/4
1
2 2 1
2
1
3 /2
/4
1 1
1 1 3 /2
/4
B C D E
G
J
0
0 2 4 6 8 10 12 14 16
2400
1 1 /2
M50 • L50 Series
7 1 /2
U.S. GALLONS PER MINUTE
5
10
10
7 1 /2
7 1 /2
3450 RPM
M50 • L50 SERIES PUMPS
HEAD IN FEET
2000
1600
10
15
15
20
1200
20
7 1 10
/2
15
7 1 15
/2
10
800
5
10
10
15
15
7 1 /2 7 1 /2 7 1 /2
5
10
5
5
10
7 1 /2
400
5
10
7
1 1 /2
2 /2 3
3
5
2
5
5
1 1 3
/2
3
J L M P R
0
10 14 18 22 26 30 34 38 42
25
20
U.S. GALLONS PER MINUTE
NOTES
•
Indicates Motor Horsepower Rating using the Service Factor for Standard MTH Motors
Most Efficient Range
Acceptable Operating Range
Horsepower data is valid for 1.0 specific gravity fluids only
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-4
M50 • L50 SERIES
Performance Curves
M50 • L50 SERIES PUMPS
HEAD IN FEET
1800
1600
1400
1200
1000
800
600
400
200
1800
M50 • L50 Series
3
5
2
2
3
3
2
5
3
/4
1 1 /2
1 1 /2
M50 • L50 Series
10
7 1 /2
7 1 /2
7 1 /2
2
3
5
2
1 1 1 /2 1 1 /2
1 1
3
/4 3
/4
2
3
1 1 /2
1 1 /2
2
2 3
1
1
3
/4
U.S. GALLONS PER MINUTE
2
1 1 /2
5
5
2880 RPM
1 1 /2
3
/4
B C D E 1 G J
0
0 1 2 3 4 5 6 7 8 9 10 11 12
2880 RPM
HEAD IN FEET
1600
20
20
1400
15
10
1200
10
15
10
1000
15 15
7 1 /2
7 1 /2
10
800
7 1 /2
5
7
10
1
/2
5
7 1 /2
10
600
5
7 1 /2
10
5
10
400
7 1 /2
2
3
5 5
3
5
200
2
1
2
1 1 1 /2
/2
3
2
J L M P R
0
8 12 14 16 18 20 22 24 26 24 28 30 32 34
U.S. GALLONS PER MINUTE
NOTES
•
Indicates Motor Horsepower Rating for Standard MTH Motors
Most Efficient Range
Acceptable Operating Range
Horsepower data is valid for 1.0 specific gravity fluids only
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-5
M50 • L50 SERIES
Performance Curves
2500
M50 B • L50B
M55B • L55B
3450 RPM
2000
M54B • L54B
3
M53B • L53B
3
3
HEAD IN FEET
1500
M52B • L52B
2
1000
M51B • L51B
500
0
0
5
M55B • L55B*
1
1 1 /2
3
/4
2
M50B NPSHR
L50B NPSHR
2
1 1 /2
1
3
/4
1 1 /2
2
1
0
1 2 3 4 5
U.S. GALLONS PER MINUTE
1 1 /2
1
10
5
NPSH IN FEET
M50 • L50 SERIES PUMPS
4
M54B • L54B*
M53B • L53B*
BHP
3
M52B • L52B*
2
M51B • L51B*
1
0
NOTES
•
Indicates Motor Horsepower Rating using the Service Factor for Standard MTH Motors
Recommended Operating Range
Refer to Factory for Operation in this Range
*Add .43 horsepower for L50B Inducer Models
Horsepower data is valid for 1.0 specific gravity fluids only
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-6
M50 • L50 SERIES
Performance Curves
2000
M50 B • L50 B
M55B • L55B
2880 RPM
M54B • L54B
1500
M53B • L53B
2
M50 • L50 SERIES PUMPS
HEAD IN FEET
1000
500
M52B • L52B
1 1 /2
2 2
M51B • L51B
1
1 1 /2
1 1 /2
3
/4
3
/4
M50B NPSHR
1
L50B NPSHR
0
0 1 2 3
0
4
U.S. GALLONS PER MINUTE
3.0
M55B • L55B*
1
1 1 /2
3
/4
5
NPSH IN FEET
2.5
M54B • L54B*
2.0
M53B • L53B*
BHP
1.5
M52B • L52B*
1.0
M51B • L51B*
0.5
0.0
NOTES
•
Indicates Motor Horsepower Rating for Standard MTH Motors
Recommended Operating Range
Refer to Factory for Operation in this Range
*Add .26 horsepower for L50B Inducer Models
Horsepower data is valid for 1.0 specific gravity fluids only
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-7
M50 • L50 SERIES
Performance Curves
2500
M50 C • L50C
M54C • L54C M55C • L55C
3450 RPM
2000
M53C • L53C
HEAD IN FEET
M52C • L52C
1500
3
1000
M51C • L51C
500
2
M50C NPSHR
10
1
3
3
1 1 /2
3
/4
1
L50C NPSHR
0
0
0
1 2 3 4 5 6
U.S. GALLONS PER MINUTE
5
M53C • L53C*
M55C • L55C*
M54C • L54C*
2
1 1 /2
2 2
3
/4
1 1 /2
1
1 1 /2
5
NPSH IN FEET
M50 • L50 SERIES PUMPS
4
M52C • L52C*
BHP
3
2
M51C • L51C*
1
0
NOTES
•
Indicates Motor Horsepower Rating using the Service Factor for Standard MTH Motors
Recommended Operating Range
Refer to Factory for Operation in this Range
*Add .45 horsepower for L50C Inducer Models
Horsepower data is valid for 1.0 specific gravity fluids only
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-8
M50 • L50 SERIES
Performance Curves
2000
M50 C • L50 C
M54C • L54C
3
M55C • L55C
2880 RPM
1500
M53C • L53C
3
M50 • L50 SERIES PUMPS
HEAD IN FEET
M52C • L52C
1000
M51C • L51C
1
500
1 1 /2
2
10
2
3
/4
1 1 /2
M50C NPSHR
2
1
1 1 /2
1 1 /2
L50C NPSHR
0
0
0 1 2 3 4 5 6
U.S. GALLONS PER MINUTE
4.0
M55C • L55C*
3
/4
1
5
NPSH IN FEET
3.5
3.0
2.5
M54C • L54C*
M53C • L53C*
BHP
2.0
M52C • L52C*
1.5
1.0
M51C • L51C*
0.5
0.0
NOTES
• Indicates Motor Horsepower Rating for Standard MTH Motors
Recommended Operating Range
Refer to Factory for Operation in this Range
*Add .27 horsepower for L50C Inducer Models
Horsepower data is valid for 1.0 specific gravity fluids only
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-9
M50 • L50 SERIES
Performance Curves
2500
M50 D • L50D
M53D • L53D M54D • L54D
5
5
2000
M52D • L52D
M55D • L55D
5
3450 RPM
HEAD IN FEET
1500
M51D • L51D
1000
500
3
1 1 /2
3
2
1
M50D NPSHR
1 1 /2
3
/4
3 3
2
L50D NPSHR
0
0 1 2 3 4 5
U.S. GALLONS PER MINUTE
6
M53D • L53D*
M54D • L54D* M55D • L55D*
1 1 /2
1
2
2
3
/4
1 1 /2
1
15
10
0
6 7 8
5
NPSH IN FEET
M50 • L50 SERIES PUMPS
5
4
M52D • L52D*
BHP
3
2
M51D • L51D*
1
0
NOTES
• Indicates Motor Horsepower Rating using the Service Factor for Standard MTH Motors
Recommended Operating Range
Refer to Factory for Operation in this Range
*Add .49 horsepower for L50D Inducer Models
Horsepower data is valid for 1.0 specific gravity fluids only
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-10
M50 • L50 SERIES
Performance Curves
2000
M50 D • L50D
M54D • L54D M55D • L55D
2880 RPM
M53D • L53D
1500
M52D • L52D
M50 • L50 SERIES PUMPS
HEAD IN FEET
1000
M51D • L51D
1 1 /2
500
3
3 3
10
2
2
2
2
1 1 /2
1
5
M50D NPSHR
1 1 /2
1 1 /2
L50D NPSHR
0
0
0 1 2 3 4 5 6 7
U.S. GALLONS PER MINUTE
6
M55D • L55D*
3
/4
1
1
3
/4
1 1 /2
NPSH IN FEET
5
M54D • L54D*
4
M53D • L53D*
BHP
3
M52D • L52D*
2
M51D • L51D*
1
0
NOTES
• Indicates Motor Horsepower Rating for Standard MTH Motors
Recommended Operating Range
Refer to Factory for Operation in this Range
*Add .29 horsepower for L50D Inducer Models
Horsepower data is valid for 1.0 specific gravity fluids only
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-11
M50 • L50 SERIES
Performance Curves
2500
M50 E • L50E
3450 RPM
M53E • L53E
M54E • L54E
M55E • L55E
2000
M52E • L52E
7 1 /2
HEAD IN FEET
5
1500
M51E • L51E
1000
500
2
M50E NPSHR
15
5
5
5
10
3
5
2 3
L50E NPSHR
1 1 1 /2
3
3
/4 2
0
0
0 2 4 6 8 10 12
U.S. GALLONS PER MINUTE
10
M53E • L53E*
M55E • L55E*
M54E • L54E*
1 1 /2
3
NPSH IN FEET
M50 • L50 SERIES PUMPS
8
M52E • L52E*
6
BHP
4
M51E • L51E*
2
0
NOTES
•
Indicates Motor Horsepower Rating using the Service Factor for Standard MTH Motors
Recommended Operating Range
Refer to Factory for Operation in this Range
*Add .57 horsepower for L50E Inducer Models
Horsepower data is valid for 1.0 specific gravity fluids only
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-12
M50 • L50 SERIES
Performance Curves
2000
M50 E • L50E
M53E • L53E
M54E • L54E
M55E • L55E
2880 RPM
1500
M52E • L52E
5
5
M50 • L50 SERIES PUMPS
HEAD IN FEET
1000
M51E • L51E
3
2
500
1 1 /2
M50E NPSHR
L50E NPSHR
5
10
3
5
2
3
0
0
0 2 4 6 8 10
U.S. GALLONS PER MINUTE
10
M55E • L55E
9
M54E • L54E*
8
1
1 1 /2
3
2
3
/4
NPSH IN FEET
BHP
7
6
5
4
M53E • L53E*
M52E • L52E*
3
2
1
0
M51E • L51E*
NOTES
• Indicates Motor Horsepower Rating for Standard MTH Motors
Recommended Operating Range
Refer to Factory for Operation in this Range
*Add .33 horsepower for L50E Inducer Models
Horsepower data is valid for 1.0 specific gravity fluids only
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-13
M50 • L50 SERIES
Performance Curves
2500
M50 G • L50G
3450 RPM
M52G • L52G
M53G • L53G
M54G • L54G
M55G • L55G
2000
7 1 /2
10
10
HEAD IN FEET
1500
M51G • L51G
1000
7 1 /2
7 1 /2
7 1 /2
5
5
500
3
5
M50G NPSHR
5
L50G NPSHR
2 3
3
1 1 /2
2
0
0
0 2 4 6 8 10 12 14
1
U.S. GALLONS PER MINUTE
18
M54G • L54G* M55G • L55G*
16
M53G • L53G*
5
15
10
NPSH IN FEET
M50 • L50 SERIES PUMPS
14
BHP
12
10
8
M52G • L52G*
6
4
2
0
M51G • L51G*
NOTES
•
Indicates Motor Horsepower Rating using the Service Factor for Standard MTH Motors
Recommended Operating Range
Refer to Factory for Operation in this Range
*Add .62 horsepower for L50G Inducer Models
Horsepower data is valid for 1.0 specific gravity fluids only
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-14
M50 • L50 SERIES
Performance Curves
2000
M50 G • L50 G
M53G • L53G
M52G • L52G
M54G • L54G
M55G • L55G
2880 RPM
7 1 /2
1500
7 1 /2
7 1 /2
M50 • L50 SERIES PUMPS
HEAD IN FEET
5
M51G • L51G
1000
3
500
M50G NPSHR
10
5
5
5
3
2
5
L50G NPSHR
1
0
0
0 2 4 6 8 10 12
U.S. GALLONS PER MINUTE
10
M53G • L53G* M54G • L54G* M55G • L55G*
9
1 1 /2
3
2
NPSH IN FEET
8
7
M52G • L52G*
6
BHP
5
4
3
M51G • L51G*
2
1
0
NOTES
•
Indicates Motor Horsepower Rating for Standard MTH Motors
Recommended Operating Range
Refer to Factory for Operation in this Range
*Add .35 horsepower for L50G Inducer Models
Horsepower data is valid for 1.0 specific gravity fluids only
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-15
M50 • L50 SERIES
Performance Curves
2500
M50 J • L50J
M53J • L53J
M52J • L52J
2000
M54J • L54J
M55J • L55J
3450 RPM
HEAD IN FEET
1500
M51J • L51J
7 1 /2
7 1 /2
7 1 /2
1000
10
5
7 1 /2
5
5
M50J NPSHR
500
5
3
5
0
0
0 2 4 6 8 10 12 14 16 18
U.S. GALLONS PER MINUTE
25
M54J • L54J* M55J • L55J*
10
10
10
L50J NPSHR
3
2
1 1 /2
15
NPSH IN FEET
M50 • L50 SERIES PUMPS
20
M53J • L53J*
BHP
15
M52J • L52J*
10
M51J • L51J*
5
0
NOTES
• Indicates Motor Horsepower Rating using the Service Factor for Standard MTH Motors
Recommended Operating Range
Refer to Factory for Operation in this Range
*Add .70 horsepower for L50J Inducer Models
Horsepower data is valid for 1.0 specific gravity fluids only
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-16
M50 • L50 SERIES
Performance Curves
2000
M50 J • L50J
M53J • L53J 10
M54J • L54J
M55J • L55J
2880 RPM
10
M52J • L52J
10
1500
7 1 /2
M50 • L50 SERIES PUMPS
HEAD IN FEET
7 1 /2
7 1 /2
7 1 /2
1000
M51J • L51J
5
5
3
M50J NPSHR
500
3
2
10
5
5
5
L50J NPSHR
0
0 2 4 6 8 10 12
0
14
U.S. GALLONS PER MINUTE
14
M54J • L54J* M55J • L55J*
12
M53J • L53J*
1 1 /2
NPSH IN FEET
10
BHP
8
6
M52J • L52J*
4
M51J • L51J*
2
0
NOTES
•
Indicates Motor Horsepower Rating for Standard MTH Motors
Recommended Operating Range
Refer to Factory for Operation in this Range
*Add .38 horsepower for L50J Inducer Models
Horsepower data is valid for 1.0 specific gravity fluids only
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-17
M50 • L50 SERIES
Performance Curves
2500
M50 L • L50L
3450 RPM
2000
M52L • L52L
M53L • L53L
M54L • L54L
15
M55L • L55L
15
HEAD IN FEET
1500
M51L • L51L
1000
500
15
10
10
10
5
7 1 /2
5
M50L NPSHR
3
L50L NPSHR
5
5
3
2
0
0
0 4 8 12 16 20 24
7 1 /2
10
7 1 /2
7 1 /2
5
10
NPSH IN FEET
M50 • L50 SERIES PUMPS
30
M54L • L54L*
M55L • L55L*
U.S. GALLONS PER MINUTE
25
M53L • L53L*
20
BHP
15
M52L • L52L*
10
M51L • L51L*
5
0
NOTES
• Indicates Motor Horsepower Rating using the Service Factor for Standard MTH Motors
Recommended Operating Range
Refer to Factory for Operation in this Range
*Add .81 horsepower for L50L Inducer Models
Horsepower data is valid for 1.0 specific gravity fluids only
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-18
M50 • L50 SERIES
Performance Curves
2000
M50 L • L50 L
M53L • L53L M54L • L54L M55L • L55L
2880 RPM
1500
M52L • L52L
M50 • L50 SERIES PUMPS
HEAD IN FEET
1000
M51L • L51L
5
500
7 1 /2
10
10
10
10
M50L NPSHR
5
5
5
3
5
2
3
L50L NPSHR
7 1 /2
7 1 /2
7 1 /2
0
0
0 2 4 6 8 10 12 14 16 18 20
U.S. GALLONS PER MINUTE
20
M54L • L54L* M55L • L55L*
1 1 /2
NPSH IN FEET
15
M53L • L53L*
BHP
10
M52L • L52L*
5
M51L • L51L*
0
NOTES
•
Indicates Motor Horsepower Rating for Standard MTH Motors
Recommended Operating Range
Refer to Factory for Operation in this Range
*Add .43 horsepower for L50L Inducer Models
Horsepower data is valid for 1.0 specific gravity fluids only
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-19
M50 • L50 SERIES
Performance Curves
2500
M50 M • L50M
3450 RPM
M52M • L52M
M53M • L53M
M54M • L54M
M55M • L55M
2000
15
15
15
HEAD IN FEET
1500
M51M • L51M
1000
500
7 1 /2
7 1 /2
15
10
10
5
10
10
7 1 /2
7 1 /2
5
M50M NPSHR
5
L50M NPSHR
3
10
5
5
2
0
0
0 4 8 12 16 20 24 28
U.S. GALLONS PER MINUTE
35
M54M • L54M* M55M • L55M*
M53M • L53M*
30
7 1 /2
NPSH IN FEET
M50 • L50 SERIES PUMPS
BHP
25
20
15
M52M • L52M*
10
M51M • L51M*
5
0
NOTES
• Indicates Motor Horsepower Rating using the Service Factor for Standard MTH Motors
Recommended Operating Range
Refer to Factory for Operation in this Range
*Add .86 horsepower for L50M Inducer Models
Horsepower data is valid for 1.0 specific gravity fluids only
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-20
M50 • L50 SERIES
Performance Curves
2000
M50 M • L50M
M53M • L53M
M50M
15
M54M • L54M
M55M • L55M
2880 RPM
M52M • L52M
1500
15
M50 • L50 SERIES PUMPS
HEAD IN FEET
1000
500
0
0
0 2 4 6 8 10 12 14 16 18 20 22
U.S. GALLONS PER MINUTE
20
M51M • L51M
5
7 1 /2
NPSHR
L50M NPSHR
M53M • L53M* M54M • L54M* M55M • L55M*
10
3
10
5
7 1 /2
10
7 1 /2
2
5
7 1 /2
1 1 /2
5
3
5
10
5
NPSH IN FEET
15
M52M • L52M*
BHP
10
M51M • L51M*
5
0
NOTES
• Indicates Motor Horsepower Rating for Standard MTH Motors
Recommended Operating Range
Refer to Factory for Operation in this Range
*Add .46 horsepower for L50M Inducer Models
Horsepower data is valid for 1.0 specific gravity fluids only
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-21
M50 • L50 SERIES
Performance Curves
2500
M50 P • L50P
3450 RPM
M53P • L53P
M54P • L54P
M55P • L55P
2000
M52P • L52P
15
20
20
HEAD IN FEET
1500
1000
500
15
15
15
10
15
M51P • L51P
7 1 /2
5
M50P NPSHR
L50P NPSHR
10
5
10
3
2
0
0
0 5 10 15 20 25 30 35
U.S. GALLONS PER MINUTE
40
M54P • L54P* M55P • L55P*
7 1 /2
10
10
7 1 /2
5
7 1 /2
NPSH IN FEET
M50 • L50 SERIES PUMPS
35
30
M53P • L53P*
25
BHP
20
M52P • L52P*
15
10
M51P • L51P*
5
0
NOTES
•
Indicates Motor Horsepower Rating using the Service Factor for Standard MTH Motors
Recommended Operating Range
Refer to Factory for Operation in this Range
*Add .97 horsepower for L50P Inducer Models
Horsepower data is valid for 1.0 specific gravity fluids only
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-22
M50 • L50 SERIES
Performance Curves
2000
M50 P • L50P
M53P • L53P M54P • L54P
20
M55P • L55P
2880 RPM
1500
M52P • L52P
15
15
15
15
M50 • L50 SERIES PUMPS
HEAD IN FEET
1000
M51P • L51P
500
5
5
0
0
0 5 10 15 20 25 30
U.S. GALLONS PER MINUTE
25
M54P • L54P* M55P • L55P*
10
10
10
10
7 1 /2
M50P NPSHR
5
3
L50P NPSHR
7 1 /2
7 1 /2
5
5
2
3
7 1 /2
1 1 /2
10
NPSH IN FEET
20
M53P • L53P*
BHP
15
10
M52P • L52P*
5
M51P • L51P*
0
NOTES
•
Indicates Motor Horsepower Rating for Standard MTH Motors
Recommended Operating Range
Refer to Factory for Operation in this Range
*Add .53 horsepower for L50P Inducer Models
Horsepower data is valid for 1.0 specific gravity fluids only
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-23
M50 • L50 SERIES
Performance Curves
2500
2000
M50 R • L50R
M55R • L55R
M52R • L52R M53R • L53R M54R • L54R
30
20
25
25
25
3450 RPM
20
HEAD IN FEET
1500
M51R • L51R
1000
500
M50R NPSHR
15
7 1 /2
20
20
15
10
L50R NPSHR 5
20
15
10
15
10
15
5
10
5
3
0
0
0 5 10 15 20 25 30 35 40 45
U.S. GALLONS PER MINUTE
40
M53R • L53R* M54R • L54R* M55R • L55R*
7 1 /2
7 1 /2
NPSH IN FEET
M50 • L50 SERIES PUMPS
30
M52R • L52R*
BHP
20
M51R • L51R*
10
0
NOTES
•
Indicates Motor Horsepower Rating using the Service Factor for Standard MTH Motors
Recommended Operating Range
Refer to Factory for Operation in this Range
*Add 1.08 horsepower for L50R Inducer Models
Horsepower data is valid for 1.0 specific gravity fluids only
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-24
M50 • L50 SERIES
Performance Curves
2000
M50 R • L50 R
M53R • L53R
25
M54R • L54R
M55R • L55R
2880 RPM
1500
M52R • L52R
20
20
20
15
M50 • L50 SERIES PUMPS
HEAD IN FEET
1000
M51R • L51R
500
7 1 /2
M50R NPSHR
5
5
L50R NPSHR
3
2
0
0 5 10 15 20 25 30 35
0
40
U.S. GALLONS PER MINUTE
30
M54R • L54R* M55R • L55R*
M53R • L53R*
15
15 15
10
10
7 1 /2
10
10
10
5
7 1 /2 7 1 /2
7 1 /2
NPSH IN FEET
25
20
M52R • L52R*
BHP
15
10
5
M51R • L51R*
0
NOTES
• Indicates Motor Horsepower Rating for Standard MTH Motors
Recommended Operating Range
Refer to Factory for Operation in this Range
*Add .61 horsepower for L50R Inducer Models
Horsepower data is valid for 1.0 specific gravity fluids only
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-25
M50 • L50 SERIES
Dimensions
C-AH
1 1/4 INLET
G
S
P
1 1/4
DISCHARGE
1 3/8
4 5/8 4 5/8
1/8
5 4 1/4
Feet Slotted for Three 1/2-13 Cap Screws
M50 PUMPS WITHOUT INDUCER
ALL MODEL M51 MODEL M52 MODEL M53 MODEL M54 MODEL M55
FRAME C-AH G S P S P S P S P S P
56C 13 1 3/16
7 1/2 10 1/16 10 12 9/16 12 1/2 15 1/16 15 17 9/16
143T-145T 13 1 3/16
SEE BELOW
7 1/2 10 1/16 10 12 9/16 12 1/2 15 1/16 15 17 9/16
182T-184T 14 1/2 1 3/16 OR REFER 7 1/2 10 1/16 10 12 9/16 12 1/2 15 1/16 15 17 9/16
213T-215T 17 1 3/16 TO T51 7 1/2 10 1/16 10 12 9/16 12 1/2 15 1/16 15 17 9/16
254T-256T 21 1/2 1 3/16
SERIES
7 1/2 10 1/16 10 12 9/16 12 1/2 15 1/16 15 17 9/16
284TS-286TS 23 1/2 1 3/16 7 1/2 10 1/16 10 12 9/16 12 1/2 15 1/16 15 17 9/16
2
5
10
9 1/4
M50 • L50 SERIES PUMPS
L50 PUMPS WITH INDUCER
ALL MODEL L51 MODEL L52 MODEL L53 MODEL L54 MODEL L55
FRAME C-AH G S P S P S P S P S P
56C 13 2 1/4 5 15/16 9 9/16 8 7/16 12 1/16 10 15/16 14 9/16 13 7/16 17 1/16 15 15/16 19 9/16
143T-145T 13 2 1/4 5 15/16 9 9/16 8 7/16 12 1/16 10 15/16 14 9/16 13 7/16 17 1/16 15 15/16 19 9/16
182T-184T 14 1/2 2 1/4 5 15/16 9 9/16 8 7/16 12 1/16 10 15/16 14 9/16 13 7/16 17 1/16 15 15/16 19 9/16
213T-215T 17 2 1/4 5 15/16 9 9/16 8 7/16 12 1/16 10 15/16 14 9/16 13 7/16 17 1/16 15 15/16 19 9/16
254T-256T 21 1/2 2 1/4 5 15/16 9 9/16 8 7/16 12 1/16 10 15/16 14 9/16 13 7/16 17 1/16 15 15/16 19 9/16
284TS-286TS 23 1/2 2 1/4 5 15/16 9 9/16 8 7/16 12 1/16 10 15/16 14 9/16 13 7/16 17 1/16 15 15/16 19 9/16
2
10
8 1/4
C-AH
1 DISCHARGE
1 1/4 INLET
4 5/8 4 5/8
1 1/2
4 1/4
4
5 1/4
3 7/8
7/8
5
1 1/8
Feet Slotted for Two 1/2-13 Cap Screws
NOTES
All dimensions in inches. May vary ± 1/4 inches.
Not for construction purposes unless certified.
*See motor price sheet for C-AH dimension (varies depending on motor enclosure)
Model M52 shown in Multistage Dimensions. Model M51 shown in Single Stage Dimensions.
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-26
M50 • L50 SERIES
Dimensions
Four H Taps
Two 1/2-13 Taps
1
E
4 1/4
12
E
4 1/4
1
1 Four 17/32 Dia. Foundation Holes 1
L
M50 • L50 SERIES PUMPS
C-AH*
1 1/4 NPT Inlet
G
S
1 1/4 NPT
Discharge
4 1/4
5 1/4
1 1/2
9 1/2
2F
P
2 1/2
M50 SERIES BASE MOUNTED CLOSE COUPLED WITH C3 MOTOR (WITHOUT INDUCER)
ALL M50 MODELS MODEL M51 MODEL M52 MODEL M53 MODEL M54 MODEL M55
FRAME 2F E H G S P L S P L S P L S P L S P L
56C 3 2 7/16 5/16-18 1 3/16
7 1/2 13 5/16 28 10 15 13/16 32 12 1/2 18 5/16 35 15 20 13/16 40
143TC 4 2 3/4 5/16-18 1 3/16 REFER TO 7 1/2 13 1/2 28 10 16 32 12 1/2 18 1/2 35 15 21 40
145TC 5 2 3/4 5/16-18 1 3/16 T51 SERIES 7 1/2 13 1/2 28 10 16 32 12 1/2 18 1/2 35 15 21 40
182TC 4 1/2 3 3/4 3/8-16 1 3/16 7 1/2 14 1/4 30 10 16 3/4 32 12 1/2 19 1/4 35 15 21 3/4 40
L50 SERIES BASE MOUNTED CLOSE COUPLED WITH C3 MOTOR (WITH INDUCER)
ALL L50 MODELS MODEL L51 MODEL L52 MODEL L53 MODEL L54 MODEL L55
FRAME 2F E H G S P L S P L S P L S P L S P L
56C 3 2 7/16 5/16-18 2 1/4 5 15/16 12 3/4 28 8 7/16 15 1/4 30 10 15/16 17 3/4 32 13 7/16 20 1/4 35 15 15/16 22 3/4 40
143TC 4 2 3/4 5/16-18 2 1/4 5 15/16 12 15/16 28 8 7/16 15 7/16 30 10 15/16 17 15/16 32 13 7/16 20 7/16 35 15 15/16 22 15/16 40
145TC 5 2 3/4 5/16-18 2 1/4 5 15/16 12 15/16 28 8 7/16 15 7/16 30 10 15/16 17 15/16 32 13 7/16 20 7/16 35 15 15/16 22 15/16 40
182TC 4 1/2 3 3/4 3/8-16 2 1/4 5 15/16 13 11/16 30 8 7/16 16 3/16 32 10 15/16 18 11/16 35 13 7/16 21 3/16 40 15 15/16 23 11/16 40
NOTES
All dimensions in inches. May vary ± 1/4 inches.
Not for construction purposes unless certified.
*See motor price sheet for C-AH dimension (varies depending on motor enclosure)
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-27
M50 • L50 SERIES
Dimensions
Four H Taps
Two 1/2-13 Taps
1
E
4 1/4
W
E
4 1/4
1
1 Four 17/32 Dia. Foundation Holes 1
L
C-AH
2F
1 1/4 NPT
Inlet
G
P
S
1 1/4 NPT
Discharge
M50 SERIES BASE MOUNTED CLOSE COUPLED WITH C30 MOTOR (WITHOUT INDUCER)
ALL M50 MODELS MODEL M52 MODEL M53 MODEL M54 MODEL M55
FRAME C-AH 2F E H G D W S P L S P L S P L S P L
184 13 3/4 5 1/2 3 3/4 3/8-16 1 3/16 5 1/4 12 7 1/2 13 1/2 28 10 16 30 12 1/2 18 1/2 32 15 21 35
213 15 1/2 5 1/2 4 1/4 3/8-16 1 3/16 5 1/4 12 7 1/2 14 1/4 32 10 16 3/4 35 12 1/2 19 1/4 40 15 21 3/4 40
215 17 7 4 1/4 3/8-16 1 3/16 5 1/4 12 7 1/2 14 1/4 32 10 16 3/4 35 12 1/2 19 1/4 40 15 21 3/4 40
254 19 3/4 8 1/4 5 1/2-13 1 3/16 6 1/4 15 7 1/2 15 35 10 17 1/2 40 12 1/2 20 40 15 22 1/2 45
256 21 1/2 10 5 1/2-13 1 3/16 6 1/4 15 7 1/2 15 35 10 17 1/2 40 12 1/2 20 40 15 22 1/2 45
284 22 9 1/2 5 1/2 1/2-13 1 3/16 7 15 7 1/2 15 1/2 40 10 18 40 12 1/2 20 1/2 45 15 23 45
286 23 1/2 11 5 1/2 1/2-13 1 3/16 7 15 7 1/2 15 1/2 40 10 18 40 12 1/2 20 1/2 45 15 23 45
4 1/2
2 1/2
4 1/4
D
1 1/2
M50 • L50 SERIES PUMPS
L50 SERIES BASE MOUNTED CLOSE COUPLED WITH C30 MOTOR (WITH INDUCER)
ALL L50 MODELS MODEL L52 MODEL L53 MODEL L54 MODEL L55
FRAME C-AH 2F E H G D W S P L S P L S P L S P L
184 13 3/4 5 1/2 3 3/4 3/8-16 2 1/4 5 1/4 12 8 7/16 15 7/16 30 10 15/16 17 15/16 32 13 7/16 20 7/16 35 15 15/16 22 15/16 40
213 15 1/2 5 1/2 4 1/4 3/8-16 2 1/4 5 1/4 12 8 7/16 16 3/16 35 10 15/16 18 11/16 35 13 7/16 21 3/16 40 15 15/16 23 11/16 40
215 17 7 4 1/4 3/8-16 2 1/4 5 1/4 12 8 7/16 16 3/16 35 10 15/16 18 11/16 35 13 7/16 21 3/16 40 15 15/16 23 11/16 40
254 19 3/4 8 1/4 5 1/2-13 2 1/4 6 1/4 15 8 7/16 16 15/16 40 10 15/16 19 7/16 40 13 7/16 21 15/16 45 15 15/16 24 7/16 45
256 21 1/2 10 5 1/2-13 2 1/4 6 1/4 15 8 7/16 16 15/16 40 10 15/16 19 7/16 40 13 7/16 21 15/16 45 15 15/16 24 7/16 45
284 22 9 1/2 5 1/2 1/2-13 2 1/4 7 15 8 7/16 17 7/16 40 10 15/16 19 15/16 45 13 7/16 22 7/16 45 15 15/16 24 15/16 50
286 23 1/2 11 5 1/2 1/2-13 2 1/4 7 15 8 7/16 17 7/16 40 10 15/16 19 15/16 45 13 7/16 22 7/16 45 15 15/16 24 15/16 50
NOTES
All dimensions in inches. May vary ± 1/4 inches.
Not for construction purposes unless certified.
*See motor price sheet for C-AH dimension (varies depending on motor enclosure)
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-28
M50 • L50 SERIES
Dimensions
Ø1 1/8 Max.
R
1 1/4 NPT
Inlet
Ø3/4
3/16 Sq. Key
S
1 1/4 NPT
Discharge
2
9 1/2
5 1/4
M50 • L50 SERIES PUMPS
1 3/4
Feet Slotted for
Two 3/8 Cap Screws 4 1/4 4 1/4
1 5/16
1/2
10 1/2
3
1 9/16
Feet Slotted for
Two 1/2 Cap Screws
11
5 1/2 P
M50 • L50 SERIES PUMP END ONLY WITH P3 BEARING PEDESTAL
PUMPS WITHOUT INDUCER
PUMPS WITH INDUCER
DIM. M52 M53 M54 M55 L51 L52 L53 L54 L55
S 7 1/2 10 12 1/2 15 5 15/16 8 7/16 10 15/16 13 7/16 15 15/16
P 12 7/16 14 15/16 17 7/16 19 15/16 11 7/8 14 3/8 16 7/8 19 3/8 21 7/8
R 5 15/16 5 15/16 5 15/16 5 15/16 6 15/16 6 15/16 6 15/16 6 15/16 6 15/16
Ø1 5/8
Max.
Ø1 1/8
Dia.
R
1 1/4 NPT Inlet
S
1 1/4 NPT
Discharge
2
3/16
Sq.
Key
9 1/2
5 1/4
Feet Slotted for
Two 1/2 Cap Screws
5 1/4 P
1/2
Feet Slotted for
Two 1/2 Cap Screws
4 1/4 4 1/4
10 1/2
11
M50 • L50 SERIES PUMP END ONLY WITH P30 BEARING PEDESTAL
PUMPS WITHOUT INDUCER
PUMPS WITH INDUCER
DIM. M52 M53 M54 M55 L52 L53 L54 L55
S 7 1/2 10 12 1/2 15 8 7/16 10 15/16 13 7/16 15 15/16
P 13 3/8 15 7/8 18 3/8 20 7/8 15 5/16 17 13/16 20 5/16 22 13/16
R 9 1/16 9 1/16 9 1/16 9 1/16 10 1/8 10 1/8 10 1/8 10 1/8
NOTES
All dimensions in inches. May vary ± 1/4 inches.
Not for construction purposes unless certified.
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-29
M50 • L50 SERIES
Dimensions
Four H Taps
Two 1/2-13 Taps
1
E 2 7/16
E
2 7/16
4 1/4
4 1/4
12
1
1 Four 17/32 Dia. Foundation Holes
Two 3/8-16 Taps
1
L
C*
K
S
4 1/2
2F
Ø3/4
1 1/4 NPT
Inlet
3/16
Key
1 1/4 NPT
Discharge
3 P
2 1/2
5 1/4
1 1/2
9 1/2
M50 • L50 SERIES PUMPS
M50 SERIES BASE MOUNTED ASSEMBLY WITH P3 BEARING FRAME (WITHOUT INDUCER)
ALL M50 MODELS MODEL M51 MODEL M52 MODEL M53 MODEL M54 MODEL M55
FRAME CPLG 2F E H K S P L S P L S P L S P L S P L
56 3J 3 2 7/16 5/16-18 5/8
7 1/2 12 7/16 32 10 14 15/16 35 12 1/2 17 7/16 38 15 19 15/16 40
143T 4J 4 2 3/4 5/16-18 5/8 7 1/2 12 7/16 35 10 14 15/16 35 12 1/2 17 7/16 38 15 19 15/16 40
REFER TO
145T 4J 5 2 3/4 5/16-18 5/8 7 1/2 12 7/16 35 10 14 15/16 35 12 1/2 17 7/16 38 15 19 15/16 40
T51 SERIES
182T 5J 4 1/2 3 3/4 3/8-16 3/4 7 1/2 12 7/16 35 10 14 15/16 38 12 1/2 17 7/16 40 15 19 15/16 45
184T 5J 5 1/2 3 3/4 3/8-16 3/4 7 1/2 12 7/16 35 10 14 15/16 38 12 1/2 17 7/16 40 15 19 15/16 45
L50 SERIES BASE MOUNTED ASSEMBLY WITH P3 BEARING FRAME (WITH INDUCER)
ALL L50 MODELS MODEL L51 MODEL L52 MODEL L53 MODEL L54 MODEL L55
FRAME CPLG 2F E H K S P L S P L S P L S P L S P L
56 3J 3 2 7/16 5/16-18 5/8 5 15/16 11 7/8 32 8 7/16 14 3/8 35 10 15/16 16 7/8 38 13 7/16 19 3/8 40 15 15/16 21 7/8 45
143T 4J 4 2 3/4 5/16-18 5/8 5 15/16 11 7/8 32 8 7/16 14 3/8 35 10 15/16 16 7/8 38 13 7/16 19 3/8 40 15 15/16 21 7/8 45
145T 4J 5 2 3/4 5/16-18 5/8 5 15/16 11 7/8 32 8 7/16 14 3/8 35 10 15/16 16 7/8 38 13 7/16 19 3/8 40 15 15/16 21 7/8 45
182T 5J 4 1/2 3 3/4 3/8-16 3/4 5 15/16 11 7/8 35 8 7/16 14 3/8 38 10 15/16 16 7/8 40 13 7/16 19 3/8 45 15 15/16 21 7/8 45
184T 5J 5 1/2 3 3/4 3/8-16 3/4 5 15/16 11 7/8 35 8 7/16 14 3/8 38 10 15/16 16 7/8 40 13 7/16 19 3/8 45 15 15/16 21 7/8 45
NOTES
All dimensions in inches. May vary ± 1/4 inches.
Not for construction purposes unless certified.
*See motor price sheet for C dimension (varies depending on motor enclosure)
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008

Page M-30
M50 • L50 SERIES
Dimensions
Four H Taps
Two 1/2-13 Taps
1
E
E
5 1/8
5 1/8
4 1/4
4 1/4
W
1
M50 • L50 SERIES PUMPS
1 Four 17/32 Dia. Foundation Holes Two 1/2 - 13 Taps 1
C*
2F
L
K
1 1/4 NPT Inlet
Ø1 1/8
3/16
Key
S
1 1/4 NPT
Discharge
M50 SERIES BASE MOUNTED ASSEMBLY WITH P30 BEARING FRAME (WITHOUT INDUCER)
ALL M50 MODELS MODEL M52 MODEL M53 MODEL M54 MODEL M55
FRAME CPLG 2F D W E H K S P L S P L S P L S P L
184T 5J 5 1/2 5 1/4 12 3 3/4 3/8-16 3/4 7 1/2 13 3/8 40 10 15 7/8 45 12 1/2 18 3/8 45 15 20 7/8 50
213T 6J 5 1/2 5 1/4 12 4 1/4 3/8-16 7/8 7 1/2 13 3/8 45 10 15 7/8 45 12 1/2 18 3/8 50 15 20 7/8 50
215T 6J 7 5 1/4 12 4 1/4 3/8-16 7/8 7 1/2 13 3/8 45 10 15 7/8 45 12 1/2 18 3/8 50 15 20 7/8 50
254T 7S 8 1/4 6 1/4 15 5 1/2-13 1 7 1/2 13 3/8 50 10 15 7/8 50 12 1/2 18 3/8 55 15 20 7/8 55
256T 7S 10 6 1/4 15 5 1/2-13 1 7 1/2 13 3/8 50 10 15 7/8 50 12 1/2 18 3/8 55 15 20 7/8 55
284TS 8S 9 1/2 7 15 5 1/2 1/2-13 1 1/8 7 1/2 13 3/8 50 10 15 7/8 55 12 1/2 18 3/8 55 15 20 7/8 60
286TS 8S 11 7 15 5 1/2 1/2-13 1 1/8 7 1/2 13 3/8 50 10 15 7/8 55 12 1/2 18 3/8 55 15 20 7/8 60
324TS 8S 10 1/2 8 18 6 1/4 21/32 1 1/8 7 1/2 13 3/8 50 10 15 7/8 55 12 1/2 18 3/8 55 15 20 7/8 60
326TS 8S 12 8 18 6 1/4 21/32 1 1/8 7 1/2 13 3/8 50 10 15 7/8 55 12 1/2 18 3/8 55 15 20 7/8 60
4 1/2
5 1/4 P
2 1/2
4 1/4
D
1 1/2
L50 SERIES BASE MOUNTED ASSEMBLY WITH P30 BEARING FRAME (WITH INDUCER)
ALL L50 MODELS MODEL L52 MODEL L53 MODEL L54 MODEL L55
FRAME CPLG 2F D W E H K S P L S P L S P L S P L
184T 5J 5 1/2 5 1/4 12 3 3/4 3/8-16 3/4 8 7/16 15 5/16 40 10 15/16 17 13/16 45 13 7/16 20 5/16 45 15 15/16 22 13/16 50
213T 6J 5 1/2 5 1/4 12 4 1/4 3/8-16 7/8 8 7/16 15 5/16 45 10 15/16 17 13/16 50 13 7/16 20 5/16 50 15 15/16 22 13/16 55
215T 6J 7 5 1/4 12 4 1/4 3/8-16 7/8 8 7/16 15 5/16 45 10 15/16 17 13/16 50 13 7/16 20 5/16 50 15 15/16 22 13/16 55
254T 7S 8 1/4 6 1/4 15 5 1/2-13 1 8 7/16 15 5/16 50 10 15/16 17 13/16 55 13 7/16 20 5/16 55 15 15/16 22 13/16 60
256T 7S 10 6 1/4 15 5 1/2-13 1 8 7/16 15 5/16 50 10 15/16 17 13/16 55 13 7/16 20 5/16 55 15 15/16 22 13/16 60
284TS 8S 9 1/2 7 15 5 1/2 1/2-13 1 1/8 8 7/16 15 5/16 55 10 15/16 17 13/16 55 13 7/16 20 5/16 60 15 15/16 22 13/16 60
286TS 8S 11 7 15 5 1/2 1/2-13 1 1/8 8 7/16 15 5/16 55 10 15/16 17 13/16 55 13 7/16 20 5/16 60 15 15/16 22 13/16 60
324TS 8S 10 1/2 8 18 6 1/4 21/32 1 1/8 8 7/16 15 5/16 55 10 15/16 17 13/16 55 13 7/16 20 5/16 60 15 15/16 22 13/16 60
326TS 8S 12 8 18 6 1/4 21/32 1 1/8 8 7/16 15 5/16 55 10 15/16 17 13/16 55 13 7/16 20 5/16 60 15 15/16 22 13/16 60
NOTES
All dimensions in inches. May vary ± 1/4 inches.
Not for construction purposes unless certified.
*See motor price sheet for C dimension (varies depending on motor enclosure)
© Copyright 2008 MTH Tool Company, Inc. Dated January 2008