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Diaphragm CM
Product Summary



Piston CP
Diaphragm DM
Diaphragm CM
Diaphragm AM
Gear F
Gear B
Lutz Pumps
Gespasa Equipment
Cucchi Pumps
Pollard Pumps
Thoelen Pumps
Piusi Equipment
Adam Pumps
Hand Pumps


Hydraulic Diaphragm pumps may be used when the liquid containing small amounts of particles in suspension.

The Wet-End consists of the Head, Valves, Diaphragm, Hydraulic Chamber, Piston and Seals.

Wet-End, Head, Diaphragm and valves is connected to the gearbox via a hydraulic chamber filled with oil. The hydraulic piston is driven by the gearbox and moves the oil which in turn moves the diaphragm.

This allows the pump to attain the same pressures as a piston pump. It also forms a sealed chamber that stops aggressive liquid from spilling to atmosphere should the diaphragm rupture. 

On request more than one head, Multiplex Pump, can be assemble to allow for proportional metering of different fluids or double the flow range of the pump.

Gravity assisted ball valves are a standard.

Standard connection to the valves are with male BSP threads or preferably by O-ring face sealing connections. Special flanged connections are also available on request.

 Standard Materials:

  • X  =  Head & Valves in S.S. AISI 316 / PTFE lined Diaphragm
    • Fluid Temperature 0C to 40C
  • P =  Head & Valves in PVC / PTFE lined Diaphragm
    • Fluid Temperature 0C to 40C

XR and PR pumps are also available with internal hydraulic recycle valve to prevent diaphragm damage.

Gearbox is a robust construction consisting of a single worm reduction gear. Adjustment of the pumped volume per stroke can be varied manually from 0-100%, whilst the pump is running or at rest, via a control knob which has an easy to read scale.

Motors are standard IEC frames, 4 pole - IP55 - TEFC, mounted vertically to the gearbox via a close coupled B14 flange. Standard motors are available in 400V or 525V three as well as 230V single phase . On special request motors can be ordered with other specifications, including explosion proof.


SLOW SPEED DOSING - Viscosity up to 300 cPs

   Maximum Delivery Pressure  (bar)Valve ConnectionsMaximum  Stroke LengthMotor     
 Flow RateStrokes per   Minute
CMP 2/83.5682010" Gm" Gm17.50.25
CMP 2/128.7
CMP 2/1817
CMP 2/2535
CMP 2/3050
CMP 2/409012
CMP 2/501427.57.5" Gm" Gm
CMP 2/551726.36.3
CMP 2/652424.54.5
CM 3/40102542010" Gm" Gm250.55
CM 3/65275991" Gm1" Gm
CM 3/905304.74.7


FAST SPEED DOSING - Viscosity up to 150 cPs

   Maximum Delivery  Pressure     (bar)Valve ConnectionsMaximum  Stroke LengthMotor     
 Flow RateStrokes per   Minute
CMP 2/86.21182010" Gm" Gm17.50.25
CMP 2/1214.2
CMP 2/1831
CMP 2/2560
CMP 2/3086
CMP 2/4015612
CMP 2/502457.57.5" Gm" Gm
CMP 2/552966.36.3
CMP 2/654154.54.5
CM 3/402091102010" Gm" Gm250.55
CM 3/65552991" Gm1" Gm
CM 3/9010704.74.7

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Copyright 2018 - Fluid Controls Trading cc

Last modified: 02 October 2018

Technical data on this website is given as an indication only, actual figures must be verified with the respective manufactures actual data sheets or manuals.