RM - SONDERMANN Pumpen + Filter GmbH & Co. KG

Product range 

Magnetically coupled centrifugal pumps 

Submersible pumps 

Filters and filter equipment 

Competence in 

pump and filter 

technologies

SONDERMANN makes the difference – 

with excellent product quality, decades 

of experience and reliable service. 

Excellent products 

Ask any expert or specialist company which 

pump technology they use, the answer will 

mostly be SONDERMANN. That’s something 

we are rightly proud of! All our products and 

devices are of highest quality, from simple 

submersible pumps to magnetically coupled 

pumps that are absolutely safe to run dry. So 

our pumps will work reliably and impeccably 

in any place for a long time. 

Reliable service 

We have an especially dense network of customer 

advisors: only in Germany, well-trained 

technical advisors in 14 distribution companies 

are at your disposal. So we are everywhere 

in close contact with the users of our 

products. Whatever challenge of fluid pumping 

or filtering you face, the job will be done 

best by a SONDERMANN pump or filter. Just 

try us! 

Decades of experience 

The SONDERMANN brand stands for decades 

of experience and continuous development 

of products. For more than 50 years now, our 

pumps and pumping systems have been used 

in various industries all over the world. And 

up to this day, we have been able to consolidate 

our technological lead. This unique 

technological know-how enables us to solve 

almost every pump-related problem of our 

clients. 

Much more than standard issue 

As standard models are often inadequate 

for a specific application, we have been prepared, 

from the beginning, to manufacture 

customized designs. Tell us your specific 

type of problem in detail and we will be able 

to help you solve it in no time. This is also 

what SONDERMANN stands for. 

Quality made in Germany 

Wherever SONDERMANN is written on, quality 

made in Germany is inside. All our products 

are entirely manufactured in Germany 

and certified according to the ISO 9001 standard. 

This is only one of the reasons why our 

products are of superior quality. Since we are 

very serious about each new pump and filter, 

every single one is thoroughly checked in 

several stages before it leaves the company. 

SONDERMANN is a member of 

the German Surface Engineering 

Industries Association. 

2

Table of Contents 

SONDERMANN pumps and filters 2 

Overview of pumps 4 

Choose the right pump 5 

Pumps 5 

of the RM series 5 

of the RM-TS series 9 

of the RM-MS series 10 

of the RM-MF series 12 

of the GM-N series 16 

of the GM-P series 19 

of the RT series 22 

Filters 25 

Universal filter vessels 25 

Quick-change filters 26 

Filters combined with pumps 27 

Filter elements and cartridges, accessories 28 

RPR-Control units 29 

Sales representations in 

Germany and abroad 30 

3

Choosing the right pump is a guarantee 

of safe and reliable operation. 

Correct installation 

Choosing the right pump for each type of 

application is a crucial factor in trouble-free 

operation for a long time. 

It doesn’t matter if the inflow is below the 

liquid level or a self-priming pump has to 

be used above liquid level or the pump 

operates in submersible applications, we 

can always offer you the right pump. 

Vertically mounted 

submersible centrifugal 

pump of the RT series 

(wet-pit installation) 

Self-priming 

side-channel pump 

of the RMS series 

Self-priming 

magnetically coupled 

centrifugal pump 

of the RMB series 

Non-self-priming 


centrifugal RM pump 

with extrapriming tank 

Non-self-priming 



of the RM series 

Vertically mounted 

submersible 


of the RTA series 

(dry-well installation) 

Other applications 

Non-self-priming centrifugal RM 

pump with extra priming tank 

Pump mounted to a transport 

vehicle 

Non-self-priming centrifugal 

RM pump with heat exchanger 

Submersible centrifugal pump 

4

RM 

Magnetically coupled centrifugal 

pumps without shaft seal 

A wide range of applications 

RM pumps are always used when perfect 

leakproofness and freedom from maintenance 

are indispensable. They are especially 

used to deliver aggressive acids and bases, 

degreasing baths, chemicals, highly corrosive 

liquids and fluids tending to cristallize. 

Manufacturers of printed-circuit boards, the 

solar industry and purification plants also 

profit from RM pumps by SONDERMANN. 

These arrangements are cost-intensive and 

require a lot of maintenance. What is more, 

the necessary maintenance intervals considerably 

reduce the availability of the 

pump. 

Constructional design 

Our magnetically coupled centrifugal pumps 

of the RM series do not have a shaft seal 

but use permanent magnets to transmit the 

motor drive to the pump impeller without 

Motor 

Rear casing 

Lantern 

Inner magnet 

Driving magnet 

Impeller 

Housing 

Advantages of RM pumps are: 

 

 

 

 

 

 

No mechanical sealing 

of the shaft. 

Mechanical separation of 

motor and pump from 

each other. 

Absolute leakproofness. 

Free from maintenance. 

Compact and space-saving 

design. 

Easy installation. 

Ball bearings 

Starting ring of of 

rear casing 

Sleeve 

bearings 

Starting ring of 

impeller 

Starting ring of 

pump housing 

Mechanical shaft seals have always been 

the weak points of conventional centrifugal 

pumps because they wear out with time. So 

when you deliver aggressive or toxic fluids, 

the leakage of fluid, for example, may result 

in a hazardous situation. 

When delivering non-lubricating fluids or 

fluids tending to crystallize in particular, the 

use of mechanical shaft seals requires very 

complex arrangements like sealing chambers 

with double-acting mechanical seals. 

any contact. A shaft exit requiring expensive 

sealing is no longer necessary, since 

the wet part and the dry part of the pump 

are hermetically separated from each other 

by the rear casing. Thus, leakages through 

worn shaft sealings are definitely ruled out 

and RM pumps are absolutely free from 

maintenance. The metal-free and all-plastic 

making of our pumps is standard since this 

design is a guarantee for best protection 

from corrosion. 

5


Our pumps of the RM series feature 

high operational reliability and minimum 

maintenance 

Characteristic curves 

Discharge head [in m.Wg] 

60 

55 

50 

45 

40 

35 

30 

25 

20 

15 

10 

5 

0 

0 100 200 300 400 500 600 700 800 900 1000 

0 6 12 18 24 30 36 42 48 54 60 

Delivery rate [in l/min. or m 3 /h] 

RM 1 

RM 1.5 







l/min 

m 3 /h 

The metal-free and all-plastic design of our 

pumps is the best way to prevent corrosion. 

Housings may be also made of special stainless 

steel. We offer the right combination of 

materials for any fluid to be delivered, depending 

on its temperature. 

Characteristics of RM pumps 

The characteristic curves of RM 1 to RM 5 

pumps show for each type of pump its delivery 

rates at given discharge heads (back 

pressure). Discharge heads are in meters, 

water gauge. If the fluid delivered has a 

density of more than 1.0, the generated 

pressure (in bars) rises accordingly. 

Simple and sturdy design 

with maintenance-free 

sleeve bearings. 

6




Non-self-priming pumps 

Non-self-priming centrifugal pumps 

Pumps of type 1 

Delivery rate: 

1–36 L/min 

Discharge head: 

up to 5 m.Wg 

Pumps of type 1.5 


1–83 L/min 


up to 7 m.Wg 



5–130 L/min 


up to 9 m.Wg 

Pumps of type 2D 


5–60 L/min 


up to 16 m.W 



8–230 L/min 


up to 23 m.Wg 



10–400 L/min 


up to 36 m.Wg 



20–900 L/min 


up to 35 m.Wg 



30–1250 L/min 


up to 60 m.Wg 

7




Self-priming centrifugal pumps and RM Cool-mini pump 

Self-priming centrifugal pumps 



1–22 L/min 


up to 54 m.Wg 

Suction head 

up to 7 m.Wg 



8–240 L/min 


up to 18 m.Wg 

Suction head 

up 3,5 m.Wg 

RM Cool 


centrifugal mini-pump 

The magnetically coupled centrifugal mini-pump of 

the RM-Cool type is the perfect high-performance 

cooling system to remove heat from laser devices, 

computers, plasma-arc cutters, etc. (available in PP, 

PPS or PVDF). 

RM pumps are vailable in 

the following materials 

Material 

temperature range 

of components in contact with the fluid 

Polypropylene (PP) 0 bis +80 °C 

Polyvinylidene fluoride (PVDF) –20 bis +95 °C 

Polyphenylene sulphide (PPS) –20 bis +100 °C 

Stainless steel (1.4305, 1.4571) –20 bis +100 °C 

Oxide ceramic 

(aluminium oxide 99.7 %) –20 bis +100 °C 

PTFE graphite –20 bis +100 °C 

Gaskets 

Ethylene-propylene-diene 

rubber (EPDM) –20 bis +100 °C 

Fluorinated rubber (FKM) –20 bis +100 °C 

FKM with coating of fluorinated 

ethylene-propylene-diene 

(FEP coated) –20 bis +100 °C 

Nitrile-butadiene rubber (NBR) –20 bis +100 °C 

RM Cool mini-pump 

Delivery rate: up to 5 L/min 

Discharge head: up to 2 m.Wg 

8

RM-TS 

Magnetically coupled 

centrifugal pumps safe 

to run dry 

Absolutely safe to run dry 

Conventional magnetically coupled pumps 

can hardly cope with dry running. In fact, 

their sleeve bearings need continuous 

liquid-film lubrication to keep bearing 

friction and the resulting frictional heat as 

low as possible and also to provide the 

bearing with sufficient cooling. With their 

Since the pump does not have a shaft seal, 

it is hermetically sealed off and, because of 

this unique design, leakages through worn 

shaft sealings are definitely ruled out. 

Simple and reliable design: 

 

 

 

 

 

 

Absolutely safe to run dry. 

Magnetically coupled, no sleeve bearings. 

Extremely high resistance to chemicals. 

All present pumps of the RM-type can be 

adapted to the new system safe to run dry. 

The pumps may be also used at high speeds 

without any problems. 

Increased efficiency by using bearings with 

an extremely small coefficient of friction. 

pumps of the RM-TS series, SONDERMANN 

offer the first magnetically coupled centrifugal 

pumps in the world that are absolutely 

safe to run dry. 

Suction and discharge ports 

with O-ring sealings 

Inner magnet 


The pumps of this new series include all 

advantages of our longstanding experience 

with pumps of the RM series and the 

additional certainty that they will not be 

damaged by dry running. The coefficient 

of friction of the new bearing system is so 

small that only a minimum of heat is 

generated. Therefore, the bearing does not 

require any liquid lubrication. 

Motor 

Fully ceramic roller bearing of 

the impeller magnet 

9

RM-MS 

Multi-stage magnetically 

coupled centrifugal pumps 

Definitely more power: 

 

 

 

 

 

 

Highly energy-efficient 

at high pressures: The 

pump’s best efficiency 

point is at high discharge 

heads and small quantities 

delivered. 

Compact, flexible and 

modular construction in 

monobloc design. 

One, two or three stages 

available. 

Extremely high resistance 

to chemicals. 

Torque transmission by 

means of magnetic coupling. 

Made of metal-free plastic 

in PP or PVDF. 

A lot more efficiency 

at high pressures 

RM-MS pumps are perfectly suited to deliver 

aggressive fluids at high pressures. 

As single-stage centrifugal pumps are not 

very efficient at high pressures, we designed 

this multi-stage centrifugal pump. 

Instead of several centrifugal pumps 

working one after the other, an RM-MS 

pump consists of several impellers connected 

in series within one volute. Thus, 

the discharge heads of all impellers add up. 

Suction and discharge ports 

with O-ring sealings 

Inner magnet 

As a result, RM-MS pumps are much more 

efficient in delivering higher flow rates at 

high pressures than single-stage centrifugal 

pumps that work within a less favourable 

operating range. 

One to three impellers, 

depending on the type 

of pump 


Motor 

10

RM-MS 

Multi-stage magnetically 

coupled centrifugal pumps 

Characteristic curves 


80 

75 

70 

65 

60 

55 

50 

45 

40 

35 

30 

25 

20 

15 

10 

5 

0 

0 

50 100 150 200 250 300 

0 3 6 9 12 15 18 


RM-MS, 3 stages 

RM-MS, 2 stages 

RM-MS, 1 stage 

l/min 

m 3 /h 

High performance 

Centrifugal pumps of the RM-MS series are 

of modular design. Magnetically driven 

impellers are connected in series. The 

pumps are available with one, two or three 

impellers (stages). 

Because of the impellers connected in 

series, one RM-MS pump is considerably 

more efficient at higher pressures than 

comparable single-stage centrifugal 

pumps would be. 

Fields of application 

The specific features and technical data of 

the RM-MS pumps make them most suitable 

to deliver aggressive chemicals at higher 

pressures but medium pump performance, 

such as in industrial booster stations for 

aggressive chemicals, demineralized water 

supply systems, spraying processes, 

scrubbers and washers as well as in dosing 

chemicals at system pressures of more than 

3 bars. 

11

RM-MF 


centrifugal pumps with 

variable-speed drive 

NEW! 

The innovative MF drive concept 

The RM 4.5-MF pump with variable-speed 

drive knows how to make intelligent use 

of its power. 

SONDERMANN’s new magnetically coupled 

centrifugal pumps have an innovative, 

energy-efficient and compact drive system 

with variable speed. This assures you of 

an optimum and need-based fluid control 

that does not waste any energy. 


RM pumps are always used when perfect 

leakproofness and maintenance-free 

operation are indispensable. In particular, 

they are used to deliver aggressive acids 

and bases, degreasing baths, chemicals, 

highly corrosive liquids and fluids tending 

to cristallize. 

Advantages of RM-MF pumps are: 

 

 

 

 

 

 

 

 

 

 

 

 

The efficiency rate of the pump 

is optimized to the operating 

point. 

Integrated speed control. 

Exceptionally high efficieny 

within the whole range of speed. 

Wide range of flexible applications 

as the centrifugal pumps are 

operated by frequency converters. 

Small and compact design. 

Since the frequency converter is 

directly mounted to the motor, 

there is no need of long, shielded 

and expensive cables to connect 

the motor to the electrical cabinet. 

More space available in the 

electrical cabinet and no need of 

cooling it. 

Adjusting the head capacity curve 

of the pump to the operating point 

required saves energy. 

Only one type of pumps to cover 

all voltages and frequencies 

throughout the world. 

The pumps already meet the IE3 

energy efficiency class standards 

that will be applicable as of 2015 

and 2017. 

Saving of energy results in less 

operating costs. 

Reduction of CO 2 emissions 

because of less power 

consumption. 

12





Delivery rates (3,500 rpm) 


45 

40 

35 

30 

25 

20 

15 

10 

5 

0 

0 100 200 300 400 500 600 700 800 900 

0 6 12 18 24 30 36 42 48 54 


RM-MF 4.5 

RM-MF 4 

RM-MF 3 

l/min 

m 3 /h 

Frequency converter 

for more flexibility 

Depending on modern operational requirements, 

a pump often has to deliver various 

volume flow rates or offer different operating 

points. Speed-changing frequency converters 

enable the RM-MF pumps to control 

fluid delivery on demand in an extremely 

easy and energy-saving way. 

The frequency converter also allows you to 

use all pumps of the RM-MF series with any 

power supply voltage and any frequency all 

over the world. This means that you may 

use an RM-MF pump in any kind of machinery 

and plant world-wide – a fact that substantially 

simplifies your site planning and 

spare parts logistics. 

Enormous potential for saving 

Very often, pumps are designed far too big 

and powerful, just to „play it safe“. But the 

various safety factors resulting from such 

hypothetical layout of the system add up 

considerably so that extremely powerful 

pumps are installed that later on are operated 

only in part load. 

In part-load operation, however, the efficiency 

of a centrifugal pump is extremely 

low and energy-wasting. On the other hand, 

the delivery rate of oversized centrifugal 

pumps is often reduced by means of throttle 

valves. Controlling the delivery rate by a frequency 

converter has the unique advantage 

that when the speed is reduced by half, the 

electric power consumption is not more 

than one eighth! 

13





Motor performance (at 3,500 rpm) 

8000 

7000 

6000 

RM4.5-MF 

RM4-MF 

RM3-MF 

Motor performance [W] 

5000 

4000 

3000 

2000 

1000 

0 

0 100 200 300 400 500 600 700 800 900 

0 6 12 18 24 30 36 42 48 54 

l/min 

m 3 /h 


Pump of type RM4.5-MF 

Pump of type RM4-MF 

Pump of type RM3-MF 

An RM-MF pump allows you to precisely 

adjust its performance to the volume flow 

required so that the power consumption 

of the pump is just as high as needed. 

SONDERMANN pumps of the RM-MF series 

are highly efficient centrifugal pumps 

whose motor efficiency more than fulfills 

the requirements of the IE2 efficiency class 

standard. What is more, our pumps already 

meet the IE3 energy efficiency class standards 

that will be applicable as of 2015 and 

2017. 

14





Comparison in size 

The multi-frequency 

drive technique 

The motors of our RM-MF pumps are especially 

designed asynchronous motors. When 

nominally loaded, they operate at a frequency 

of 120 Hz and a rated speed of 3,450 rpm. 

As these motors have been optimized to 

operate with a frequency converter, they 

cannot run without such frequency converter. 

As a standard feature, the frequency 

converter is directly mounted to the motor 

and thus combines a compact drive unit 

with the motor. SONDERMANN frequency 

converters adjust the magnetizing current 

to the load required and thus considerably 

increase the motors’ efficiency in part-load 

operation. It is also possible to control such 

motor by an external frequency converter 

that is installed in the electrical cabinet or 

at the wall (optionally available). 

Another substantial advantage of the motors 

of RM-MF pumps is that they are much 

smaller and lighter than any other standard 

asynchronous motor of the same power 

Comparison of two magnetically coupled centrifugal pumps of 7.5 kW 

clearly shows that the RM-MF pump is distinctly more compact than the 

pump with a conventional IE2 class motor. 

within the IE2 energy efficiency class. That’s 

why the new RM-MF pumps are efficient and 

compact centrifugal pumps for precise fluid 

control on demand. 

Comparison of sizes 

Nominal power 

motor size 

kW IE2 motor MF motor 

0,75 80 63 

1,1 90 71 

1,5 90 71 

2,2 90 80 

3,0 100 80 

4,0 100 90 

5,5 112 100 

7,5 132 100 

11,0 160 112 

15,0 160 132 

18,5 180 132 

22,0 180 132 

15

GM-N 


standard chemical pumps 

Pumps of the GM-N series 


Magnetically coupled centrifugal pumps of 

the GM-N series are centrifugal chemical 

pumps with PTFE/PFA lining. Their dimensions 

and nominal duty points comply with 

the DIN EN 22858 standard. They are available 

as GM-NP pump in pull-out design 

with free shaft end or as GM-NB pump in 

monobloc design with flange-mounted drive 

motor. 

The pumps are resistant to almost all kinds 

of corrosion because the fluids delivered 

will be only in contact with PTFE/PFA, oxide 

ceramic, zirconium oxide or silicon carbide. 

GM-N pumps are magnetically driven singlestage 

pumps with annular casing that do not 

have a shaft seal. The rear casing hermetically 

closes the pump which is absolutely 

leak-proof. This rear casing is either made 

of composite carbon fibre material and lined 

with PTFE or made of zirconium oxide. The 

closed impeller made of PTFE is mounted to 

a hollow ceramic shaft with double sleeve 

bearings made of silicon carbide. Due to this 

hollow shaft, the sleeve bearings are always 

impeccably lubricated and cooled, even 

under difficult operating conditions. So the 

pump is less sensitive to incomplete lubrication 

and/or dry running. 

Vacuum-proof 

case lining of PFA, 

4 mm thick. 

Thrust bearings of 

optimum dimensions 

take the axial thurst. 

PTFE impeller with 

curved blades for 

more efficiency. 

Special parallel 

keys for power 

transmission. 

Shafts with bore holes 

ensure for forced internal 

circulation to 

improve lubrication of 

the bearings. 

Metal-free rear casing 

made of carbon 

fibre to prevent eddy 

losses. 

16

GM-N 



The driving mechanism 


The permanent-magnetic transmission 

system consists of a PTFE coated inner 

magnet and a flywheel with outer magnets. 

The permanent magnets are made of cobalt 

and samarium. A rear casing with PTFE 

lining or made of zirconium oxide hermetically 

closes the pump which is absolutely 

leak-proof. 

As they are absolutely leak-proof, GM pumps 

are perfectly suited to deliver highly 

aggressive or hazardous liquids. Thus, users 

in all fields of the chemical and pharmaceutical 

industries have relied on our pumps 

for a long time past. The standard chemical 

pumps are available either in pull-out design 

or in compact monobloc design with flangemounted 

motor. 

Advantages of GM-N pumps are: 

 

 

 

 

 

 

Ceramic shaft with bore holes 

for internal split-stream 

circulation. 

Less sensitive to incomplete 

lubrication. 

Impellers with curved blades 

for more efficiency. 

No eddy losses due to metal-free 

rear casings. 

PTFE parts are free of metallic 

framework. 

Silicon-carbide thrust bearings 

of optimum dimensions take the 

axial thrust. 

The standard chemical pumps 

are available as GM-NP pump 

in pull-out design with free 

shaft end or as GM-NB pump in 

compact monobloc design with 

flange-mounted motor. 

Safe and environmentally friendly 

Our pumps allow you to safely and environmentally friendly deliver highly 

aggressive liquids like, for example, monochloroacetic acid, sulphuric acid 

and hydrofluoric acid, because they are made of highly corrosion-resistant 

materials. 

17

GM-N 



Characteristic curves of GM-N pumps (n= 2,900min -1 , 50Hz) 

100 

90 

80 

50-250 


70 

60 

50 

40 

30 

20 

10 

25-160 

32-160 

50-200 

32-200 

40-200 

80-200 

0 

0 1 2 4 6 8 10 

20 30 40 50 60 70 80 100 120 140 160 180 

Delivery rate [in m 3 /h] 

Characteristic curves of GM-N pumps (n= 1,450min -1 , 50Hz) 

24 

22 

50-250 


20 

16 

12 

8 

4 

25-160 

32-160 

50-200 

32-200 40-200 

80-200 

0 

0 1 2 4 6 8 

10 20 30 40 50 60 70 80 100 120 

Delivery rate [in m 3 /h] 

18

GM-P 

Magnetically driven 

peripheral chemical pumps 

made of PTFE 


Pumps of the GM-P series 

GM-P pumps are peripheral or side-channel 

pumps that are best suited to deliver small 

to medium volume flows at high pressures 

of up to 8 bars. Like pumps of the GM-N 

series, these pumps are also resistant to 

almost all kinds of corrosion. Thus, they 

are best suited for absolutely leak-proof 

delivery of highly aggressive and hazardous 

liquids that are free of abrasive or crystalline 

components. 

GM-P pumps are peripheral pumps in 

monobloc design with PTFE/PFA lining. 

As these magnetically coupled pumps do 

not have a shaft seal, they are hermetically 

closed and do not need any packing at all. 

The pumps are resistant to almost all kinds 

of corrosion because the fluids delivered 

will be only in contact with PTFE/PFA, oxide 

ceramic, zirconium oxide or silicon carbide. 

The pumps are just as suitable to deliver 

liquids with low boiling points because they 

are absolutely insensitive to cavitation. The 

volume flow may even contain up to 30 

percent of gas. 

Advantages of GM-P pumps are: 

 

 

 

 

 

Insensitive to cavitation. 

Delivery of fluids with a 

gas content of up to 30%. 

Ceramic casing inserts 

for constant delivery 

rates, even at varying 

temperatures. 

No eddy losses due to 

metal-free rear casing. 

PTFE parts are free of 

metallic framework. 

Vacuum-proof case 

lining of PFA, 

4 mm thick. 

Ceramic casing 

inserts for free 

impeller rotation. 

Special parallel 

keys for power 

transmission. 

Metal-free rear 

casing made of 

carbon fibre to 

prevent eddy 

losses. 

19

GM-P 



made of PTFE 


A special technology 

GM-P pumps are magnetically driven singlestage 

peripheral pumps that do not have 

a shaft seal. The annular casing is either 

made of spheroidal graphite cast iron and 

lined with PFA or of PTFE. The impeller 

made of PTFE is floating on a ceramic 

shaft and supported at both sides by sleeve 

bearings of silicon carbide. The rear casing 

hermetically closes the pump which is 

absolutely leak-proof. This rear casing is 

either made of composite carbon fibre 

material and lined with PTFE or of zirconium 

oxide. The magnetic coupling consists 

of a PTFE coated inner magnet and a flywheel 

with driving magnets. 

It is important to keep to various parameters 

in order to guarantee a constant performance 

throughout the overall operating 

time. 

On the one hand, the performance of a 

peripheral pump depends on the size of 

its discharge channel and the width of 

the gap between impeller and discharge 

channel walls. On the other hand, corrosionresistant 

materials (like PTFE or PFA) built 

into the pump tend to creep or cold-flow 

when pressure or temperature varies so 

that pump performance would change in 

the course of time. 

20

GM-P 



made of PTFE 

Characteristic curves of GM-P pumps (n= 2,900min -1 , 50Hz) 


100 

80 

60 

40 

25-140 

25-100 

15-90 

20 

0 

0 

16 

32 

66 

100 133 166 200 233 266 300 l/min. 

1 

2 

4 

6 8 10 12 14 16 18 m 3 /h 


A corrosion-resistant ceramic insert inside 

the casing helps to avoid this and always 

grants a constant width of this gap. 

The metal-free rear 

casing of GM-P pumps 

is made of carbon 

fibre to prevent 

eddy losses. 

Advantages for the user are: 

All operating parameters are kept for 

the entire service period of the pump. 

A defined width of gap allows for easy 

inspection without expensive 

adjustments required. 

Trouble-free operation at temperatures 

of up to 150°C and operating pressures 

of up to 16 bars. 

21

RT 

Submersible centrifugal pumps for 

wet-pit and dry-well installation 

Advantages of RT pumps: 

 

 

 

 

 

 

Non-corroding plastic pump 

without any metal part in 

contact with the fluid. 

Patented shaft-sealing 

ceramic labyrinth that is 

free of wear. 

The pump is available in PP, 

PVDF and stainless steel. 

High efficiency by using 

a volute. 

Flanges may be dimensioned 

according to our clients’ 

specifications. 

Drive unit with mounted 

frequency converter is 

available upon request. 

Innovative technology 

makes the difference 

The search for better and nearer to perfect 

solutions resulted in an all-time technological 

standard from which our clients in this 

field of application benefit as well. 

SONDERMANN’s submersible centrifugal 

pumps distinguish themselves by their 

practical design and sturdy construction. 

All components being in contact with the 

fluid are made of materials that are resistant 

to corrosion and chemicals. 

The pumps’ construction also offers the advantages 

that they are safe to run dry (without 

requiring intermediate bearings), do not 

require much space and can be adjusted to 

specific requirements of our clients. 

SONDERMANN’s submersible centrifugal 

pumps are used for vertical wet-pit operation 

in pressureless containers, open basins 

and pits. They have excellent performance 

in the delivery and circulation of clean, 

slightly contaminated and abrasive fluids, 

aqueous solutions, suspensions and liquid 

mixtures. 

Our submersible centrifugal pumps are best 

suited to deliver acids and bases, acid and 

alkaline mixtures, solvents, alkaline degreasing 

and electroplating baths, photochemicals 

and many other low-viscosity 

fluids of up to 160 mPa s (or 160 cP). 

22

RT 

Submersible centrifugal pumps for 


Constructional features 

of RT pumps 

Fixed connection, 

90° offset 

Protection class 

Our motors are of protection class 

IP55 (ventilation cowl with protective 

canopy). Explosion-proof motors 

available upon request. 

Sound-pressure level 

Because of the motor’s precisionbalanced 

running, the sound-pressure 

level is below 70dB (A), according to 

DIN EN 12639 standard. 

Electric drive 

by a surface-cooled single-phased or 

three-phase low-voltage cage motor. 

Upon request, motors with 

integrated frequency 

converter are also 

available. 

Coating 

Two-compoment acidproof protective 

varnishing. Special colours are available 

upon request. 

Fixed connection, 

vertical up 

The discharge pipe 

(left picture) may be 

replaced by a filter 

(right picture). 

Discharge port 

Screw neck according 

to DIN 8063 standard (or 

optional version of flange 

connection according to 

DIN 2501 standard, PN 10/16). 

Flange dimensions 

are made at short 

notice according to 

customer specifications. 

Shaft gland 

For every kind of application, a specific 

gland sealing is used. Especially for the 

delivery of highly crystallizing fluids, 

SONDERMANN pumps are equipped with 

a patented sealing system. 

Non-corroding 

plastic pump without any 

metal part in contact with 

the fluid. The motor shaft is 

entirely coated with plastic 

material. 

Sturdy construction 

Pump housing, mounting 

flange, standpipe and 

discharge pipe are 

welded together to a 

complete unit. 

This unit is also available 

as flexible assembly 

screwed together. 

High efficiency 

because of the 

volute used. 

Performance data 

SONDERMANN pumps have the right impeller 

for every delivery rate required. 

Suction port 

The suction port is equipped with a 

strainer to protect the pump from 

coarse contaminations. An extension 

tube is optionally available. 

23

RT 

Centrifugal immersion pumps for 


(Our RTA pumps for dry-well installation 

have the same features) 

Pumps for wet-pit installation 


Delivery rate of 

up to 32 L/min 

Discharge head of 

up to 7 m.Wg 

Submergence of 

up to 400mm 





up to 12 m.Wg 


up to 500mm 





up to 25 m.Wg 


up to 500mm 





up to 32 m.Wg 


up to 500mm 



up to 1,000 L/min 


up to 42 m.Wg 


up to 500mm 





up to 43 m.Wg 


up to 850mm 

24

Solid, reliable and efficient: 

Universal filter housings by SONDERMANN 

available in sizes 1 to 32 to meet every reqirement 

All advantages at a glance: 

Our universal filter 

housings come in 

different sizes with 

1 to 32 slots for 

filter cartridges and 

a height of 4 to 40 

inches. Thus we can 

exactly dimension 

every filter to your 

specific demands. 

 

 

 

 

 

 

 

Great choice of filters. 

All-purpose filter chambers 

can take a wide range 

of various filter elements. 

Housings are entirely 

made of plastic. 

All filters can be combined 

with all of our pumps. 

Splash-guard built into 

the filter cap. 

Thanks to their quick-release 

fastener, the quick-change 

filter types are extremely 

easy to handle. 

Pressure losses are very low. 

A filter of size 1, for example, has a 

filtration rate of up to 3,000 L/h. 

A filter of size 32, for example, has a 

filtration rate of up to 72,000 L/h. 

SONDERMANN filters are used to remove 

both organic and inorganic contaminations 

from aggressive and neutral liquids, by 

means of high-pass or surface filtration. 

Main fields of application include electroplating, 

etching and cleaning plants, 

sewage and water treatment installations 

as well as solar, textile and food industries. 

The following filter elements can be 

inserted into our filter housings: 

– wound cartridge, cloth and membrane 

filters; 

– paper disks, filter bags and sieves; 

– activated carbon as granular bed or 

filter cartridge. 

As they are entirely made of plastic, these 

filter housings are especially suited to filter 

aggressive fluids, such as 

– acids, bases and mixtures; 

– solvents; 

– alkaline degreasing baths; 

– electroplating baths; 

– photochemicals; 

– radioactive, aseptic and precious liquids; 

– other low-viscosity fluids. 

Apart from standard filters that can be 

combined with every SONDERMANN 

pump, we also design and produce, in close 

cooperation with our clients, customized 

functional modules ready to be installed. 

25

Solid, reliable and powerful: 

Filtertechnology by SONDERMANN is top quality 

and best performance 

Quick-change and belt filters 

Quick-change filters of the SF series 

SF 1 filter 

Made of PP or PVDF. 

Suitable for woundcartridge 

filter 

elements and sieves. 

Quick-release lock 

by means of a hand 

lever. 

Double safety 

cap switch. 

SF 3 filter 

Made of PP or PVDF. 

Suitable for woundcartridge 

filter elements, 

sieves, filter 

bags and activated 

carbon filters. 

Quick-release lock by 

means of a hand lever. 

Double safety 

cap switch. 

Belt filter 

Inclined-bed belt 

filter made of 

plastic, with 

variable-speed 

drive. 

This filter is espcially 

suitable for 

aggressive fluids 

with high contanmination 

levels. 

Flow indicators to ensure safety 

Flow indicators built into pipelines are a simple and 

cost-effective way to monitor the flow of the fluid 

delivered. Our flow indicators come in two designs: 

Indicators made of PP are suited for low-viscosity 

fluids resembling water with densities of 0.8 to 1.5, 

those made of PVDF are also suited for low-viscosity 

fluids resembling water but with densities of 0.8 to 1.84. 

26

The right combination of filters and pumps 

for more efficiency and reliability 

Exemplifying combinations of filters and magnetically coupled pumps 

Filters combined with magnetically coupled pumps 

Size 1 

Filter of size 1 

combined with 

a magnetically 

coupled pump of 

the RM 1.5 series, 

used with one 

filter candle for a 

filtration rate of 

up to 3,000 L/h. 

Size 4 


combined with a 

magnetically 


the RM 3 series, 

used with four 

filter candles for 

a filtration rate of 

up to 12,000 L/h. 

Filter with magnetically coupled pump 

and activated-carbon element 

Size 8 


combined with 

a magnetically 


the RM 4 series, 

used with eight 

filter candles and 

an activated-carbon 

chamber for 

a filtration rate of 

up to 30,000 L/h. 

Filter plant with a filter of size 

32 for a filtration rate of up to 

72,000 L/min. 

The unit integrates into a tailormade 

functional module ready 

to be installed that was 

designed and produced in close 

cooperation with our 

client. 

Activated carbon 

Activated carbon filters are especially 

used with electroplating baths, but also 

to absorb organic substances, remove 

foreign metals and regain precious 

metals from flushing water. 

27

A wise decision: Filter housing, pump and filter 

material made by one and the same company 

Exemplifying combinations of filters, submersible pumps, 

filter elements and accessories 

Combinations of filters and submersible pumps 

Submersible pump 

of the RT series 

combined with a 

filter of size 1 for a 



and a submergence 

of 200 to 500mm. 

RT pump combined 

with a quick-change 

filter of the SF 1 

series for a 



and a submergence 

of 270 to 500mm. 

Filter elements and accessories 

Wound or extruded filter 

candles for high-pass filtration 

Their advantages are high 

intake of contaminations 

and easy handling. Optionally 

available are membrane filter 

candles, filter candles with 

activated carbon or made of 

stainless steel. 

Filter bags 

made of different materials 

such as PP, needled felt, cotton, 

etc. 

Their advantages are absolute 

filtration, washability and easy 

handling. 

Wound filter cartridge 

Filter bag element 

Filter plates 

for absolute filtration with 

(surface) filter plates made 

of paper or needled felt, for 

example. 

Their advantages are highest 

separation accuracy and 

low-priced consumables. 

Accessories 

Differential pressure 

switch to monitor pump 

and filter, with hose 

connectors or flanges 

according to DIN 2501 

standard. 

Filter plate element 

28

RPR-Control 100 

The active-power meter integrated 

to the RPR-Control 100 system has 

four user-programmable switching 

thresholds that are assigned to the 

operating conditions of 

– dry running; 

– overheating; 

– overload; 

– flow rate falling below 

the minimum value. 

All advantages at a glance: 

 

 

 

 

 

 

Safe and efficient 

monitoring of pumps of 

up to 20kW. 

Cost-saving avoidance 

of expensive damages 

to the pump. 

Increased availability of 

your installation. 

No pipeline fixtures required. 

Unproblematic retrofitting 

to existing installations. 

Integrated operating-hours 

meter to indicate due 

maintenance inspection of 

the installation. 

Electronic monitoring of motor currents 

reliably protects pumps from dry running, 

overheating and overload. If the above mentioned 

malfunctions cannot be completely 

ruled out with your installation, you should 

use an electronic protector to switch off the 

pump before it is damaged. Such protectors 

will not only prevent damage to the pump, 

but also avoid breakdowns of the installation 

and costs resulting thereof. Once the 

cause of the malfunction is eliminated, the 

pump is immediately ready to continue operation. 

RPR-Control 100 1 

to be built into electrical 

cabinets and plug in the 

separate programming unit. 


to be built into control 

cabinets and with integrated 

programming unit. 

The protector can also be used to monitor 

a set minimum volume flow rate in order to 

automatically detect and signal a clogged 

filter or scheduled replacement of filters. 


Portable monitoring device 

with indicating lamps and 

push-buttons but without 

programming unit. 

Separate programming unit 

Hand-held programmer with 

cable and plug to programme 

switching thresholds to 

RPR-Control 100 1 and 

RPR-Control 100 3. 

29

Sales areas in Germany 

Thanks to our wide distribution network all over 

Germany, you will always find one of our experts 

at close range. 

4 

BREMEN 

MÜNSTER 

KIEL 

ROSTOCK 

HAMBURG 

HANNOVER 

3 

2 

MAGDEBURG 

1 

BERLIN 

1 Berlin/Brandenburg 

Sondermann Pumpen + Filter 

GmbH & Co. KG 

August-Horch-Straße 2, 51149 Köln 

Tel.: 0 22 03/93 94-0 

Fax: 0 22 03/93 94-48 

info@sondermann-pumpen.de 

2 Hamburg/SH/MV 

Dieter Roy 

Dorfstraße 23, 21514 Kleinpampau 

Tel.: 0 41 55/82 38 10 0 

Fax: 0 41 55/82 38 10 1 

mobil: 0172/628 77 82 

d.roy@flux-pumpen.de 

3 Hannover/Kassel 

Dipl.-Ing. (FH) Ulrich Pöhls 

Alte Bemeroder Straße 122, 

30539 Hannover 

Tel.: 05 11/51 71 51 

Fax: 05 11/54 45 92 9 

mobil: 0172/628 77 83 

u.poehls@flux-pumpen.de 

4 Bremen/Münster 

Dipl.-Ing. (FH) Mathias Reimer 

Zwickenbach 18, 49324 Melle 

Tel.: 0 54 22/92 27 48 0 

Fax: 0 54 22/92 27 48 6 

mobil: 0170/180 25 46 

m.reimer@flux-pumpen.de 

5.1 Nordrhein-Westfalen Süd 

Waldemar Wostmann 

Mattlener Weg 12, 50769 Köln 

Tel.: 02 21/70 88 19 2 

Fax: 02 21/70 04 09 6 

mobil: 0177/708 81 92 

pumpeninfo@wostmann.de 

5.2 Nordrhein-Westfalen Nord 

Stephan Hill 

Wilensteinweg 10, 50739 Köln 

Tel.: 02 21/29 01 14 22 

Fax: 0 22 03/93 94-48 

mobil: 0173/716 28 44 

s.hill@sondermann-pumpen.de 

6 Hessen 

Robert Höfling 

Odenwaldring 25, 

63500 Seligenstadt 

Tel.: 0 61 82/15 83 

Fax: 0 61 82/96 19 27 

mobil: 0177/583 49 69 

r.hoefling@flux-pumpen.de 

KÖLN 

7.1 Baden-Württemberg Nord 

Martin Reichert 

Talweg 12, 75433 Maulbronn 

Tel.: 0 70 43/10 1-420 

Fax: 0 70 43/10 1-444 

mobil: 0174/166 57 62 

m.reichert@flux-pumpen.de 

7.2 Baden-Württemberg Süd 

Dipl.-Ing. (FH) Dieter Röder 

Hans-Thoma-Str. 16, 

75015 Bretten 

Tel.: 0 72 52/50 49 79 2 

Fax: 0 72 52/50 49 79 3 

mobil: 0172/101 42 17 

d.roeder@flux-pumpen.de 

5.1 

8 Bayern Süd 

Markus Werner 

Hauptstraße 5a, 82544 Egling 

Tel.: 0 81 76/15 45 

Fax: 0 81 76/99 70 23 

mobil: 0172/831 15 96 

m.werner@flux-pumpen.de 

9 Bayern Nord 

Dipl.-Ing. (FH) W. Schauer 

Joseph-Otto-Kolb-Str. 31, 

91088 Bubenreuth 

Tel.: 0 91 31/82 97 75 0 

Fax: 0 91 31/97 46 38 2 

mobil: 0172/628 77 81 

w.schauer@flux-pumpen.de 

10 

5.2 

SAARBRÜCKEN 

6 

ERFURT 

FRANKFURT 

WÜRZBURG 

NÜRNBERG 

9 

MANNHEIM 

MAULBRONN 

STUTTGART 

7.2 

FREIBURG 

7.1 

15 16 

8 

MÜNCHEN 

10 Rheinland-Pfalz/Saarland 

Frank Schorn 

Fliederstraße 19, 

66773 Schwalbach 

Tel.: 0 68 34/56 72 50 

Fax: 0 68 34/56 72 62 

mobil: 0172/625 92 23 

f.schorn@flux-pumpen.de 

DRESDEN 

15 Thüringen/Sachsen-Anhalt 

Dipl. Ing. (FH) Hendrik Müller 

Angerstraße 4, 06193 Petersberg 

Tel.: 0 34 60 6/29 03 21 

Fax: 0 34 60 6/29 03 22 

mobil: 0172/132 46 74 

h.mueller@flux-pumpen.de 

16 Sachsen 

Dipl.-Ing. Gerd Hanauska 

Südstraße 37, 

09212 Limbach-Oberfrohna 

Tel.: 0 37 22/50 25 75 

Fax: 0 37 22/50 56 03 

mobil: 0172/628 77 84 

g.hanauska@flux-pumpen.de 

30

Sales representations abroad 

SONDERMANN pumps and filters 

are present all over the world. Are 

you looking for an opportunity to 

buy our products in your country? 

Just give us a call at our Cologne 

headquarters or send us an email. 

We will be pleased to help you. 

SONDERMANN 

Pumpen + Filter GmbH & Co. KG 

August-Horch-Straße 2 

D-51149 Cologne 

Phone: +49 22 03/93 94-0 

Fax: +49 22 03/93 94-48 


www.sondermann-pumpen.de 

For more than 50 years, SONDER- 

MANN’s specialist consultants have 

also advised you on the comprehensive 

range of FLUX pumps. FLUX’s 

pumps have always been known for 

their excellent quality. Now, they 

offer a wide range of products from 

barrel and container pumps to submersible 

centrifugal and eccentric 

screw pumps to pneumatic diaphragm 

pumps, mixers, liquid-flow 

meters and lots of accessories. 

You will find more information at 

www.flux-pumpen.de. 

31

SPU 12/2012 - PDF_GB 

SONDERMANN 

Pumpen + Filter GmbH & Co. KG 

August-Horch-Straße 2 

D-51149 Cologne 

PO Box 920101 

D-51151 Köln 

Phone: +49 22 03/93 94-0 

Fax: +49 22 03/93 94-48 


www.sondermann-pumpen.de 

Subject to technical modifications.

RM - SONDERMANN Pumpen + Filter GmbH & Co. KG

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