RT-MU Info - SONDERMANN Pumpen + Filter GmbH & Co. KG

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RT-MU Info - SONDERMANN Pumpen + Filter GmbH & Co. KG

RT-MU Technical Information

Created by : Christian Vogt

Dated : 30 Aug. 2012

NEW: RT-MU magnetically coupled submersible motor pump for use with chemicals

SONDERMANN's submersible RT-MU pump has been among the first submersible motor

pumps that are absolutely resistant to chemicals. So they are ideal for direct use in chemical

tanks and containers.

As the magnetically coupled pump does not have a shaft seal, it is hermetically closed. This

feature is of vital importance for the use of a submersible pump in aggressive chemicals like

acids and bases because the pump cannot be damaged by leaking shaft seals. The entire

pump including its motor is fully enclosed in plastic material. This may be PP, POM or

PVDF, depending on the fluid delivered. Thus the fluid will never be in contact with any

metal - the best guarantee of superior chemical resistance.

More safety

For the delivery of hazardous fluids being stored in double-walled tanks, our new RT-MU

pumps have crucial advantages over discharge pumps that are installed outside the tank.

As the pump is placed inside the tank, any leakage at the connecting piece in the tank wall

or at the pump itself is ruled out. It is not necessary to install expensive safety precautions

like drip pans with leakage sensors or other safety fittings.

The RT-MU pump means utmost safety by minimum expenditure.

SONDERMANN PUMPEN + FILTER GMBH & Co. KG • D-51149 Cologne

Phone: +49 (0) 22 03 - 93 94 -0 • Fax: +49 (0) 22 03 - 93 94 -48 • E-mail: info@sondermann-pumpen.de


RT-MU Technical Information

Created by : Christian Vogt

Dated : 30 Aug. 2012

A new kind of freedom

If discharge pumps are installed outside chemical tanks, the tanks must not exceed a

certain height because the head of liquid cannot be lifted for more than 5 to 8 meters,

depending on the density of the fluid delivered. In case you try to deliver it farther on, the

head of liquid will break off and you won't be able to empty the tank.

The RT-MU pump is different. It is placed on the bottom of the tank within the fluid. So there

is a continuous inflow to the pump, irrespective of the head of liquid or height of tank. Thus

the pumps are able to empty tanks of any height.

Highly reliable construction without shaft seal

The RT-MU pump is based upon the well-tried design series of our magnetically coupled

RM pumps. The rear casing hermetically separates the pump from the motor. Permanent

magnets convey the motor drive to the pump impeller without any contact. So there is no

need of a shaft seal that tends to leak – a vital advantage of a submersible motor pump.

Suction screen impeller inner magnet driving magnet

frame (of PP or PVDF)

Rear casing

driving motor

motor enclosure

If the rear casing leaks as a result of an accident, a leakage sensor may optionally be

installed in the lantern of the motor.

SONDERMANN PUMPEN + FILTER GMBH & Co. KG • D-51149 Cologne

Phone: +49 (0) 22 03 - 93 94 -0 • Fax: +49 (0) 22 03 - 93 94 -48 • E-mail: info@sondermann-pumpen.de


RT-MU Technical Information

Created by : Christian Vogt

Dated : 30 Aug. 2012

All-plastic construction

All parts of this pump that are in contact with the fluid delivered, are made of plastic such as

PP, PVDF or POM, depending on the chemical resistance required. Another material used

is oxide ceramic. Even the enclosures of the motor lantern and the motor itself are made of

plastic so that the fluid delivered will never be in contact with any metal.

This allows you to use our RT-MU pump even with highly aggressive acids like sulphuric

and hydrochloric acids.

As an option, the RT-MU pump is also available with a submersible grey cast iron motor

without plastic enclosure that may be used in buried AdBlue tanks, for example.

Being mounted into a supporting frame, the pump rests firm within the tank, an additional

fastening to the tank bottom is not necessary.

RT-MU pump with grey cast iron motor mounted into a supporting frame

Performance range:

Motor capacity delivery rate discharge head

RT-MU pump of type 3 0.75 to 1.5kW up to 12m³/h up to 22m.Wg

RT-MU pump of type 4 1.5 to 3.0kW up to 24m³/h up to 35m.Wg

RT-MU pump of type 4.5 2.2 to 7.5kW up to 50m³/h up to 35m.Wg

The characteristic curves of the pumps are identical with those of our RM pumps (detailed in

the RM main catalogue).

SONDERMANN PUMPEN + FILTER GMBH & Co. KG • D-51149 Cologne

Phone: +49 (0) 22 03 - 93 94 -0 • Fax: +49 (0) 22 03 - 93 94 -48 • E-mail: info@sondermann-pumpen.de

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