The pump of the DMX series is a versatile positive displacement diaphragm dosing pump. The diaphragm is coupled mechanically via a precise gear-eccenter-tapet-system to a high efficiency AC motor. The dosing capacity is adjusted by varying the stroke length at the stroke adjustment knob in the ratio 1:10. The liquid end is composed of:
- Dosing head
- PTFE coated diaphragm
- Single ball valves
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Other features:
- Robust industrial pump with aluminium enclosure
- Easy to install and operate design
- Long life PTFE coated diaphragm
- Optimum capacity and stroke frequency graduation
- Dosing flow variation ±1.5% (FS), linearity ±4% (FS)
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Applies only to pumps with: ATEX certification
The dosing pump DMX 226 is certified according to the ATEX guideline RL 94/9/EC for non-electrical operating supplies. The motor versions EEx e and EEx de defined by Grundfos are certified by the manufacturers according to ATEX guidelines for electrical operating supplies. The motor type plate is labelled according to ATEX.
Electronics features:
Applies only to pumps with control variant: AR
Etron Profi microprocessor electronics, direct attached to motor:
- Stroke frequency adjustable from 1 stroke/min to maximum stroke frequency
- Pulse control with multiplier and divisor
- Analogue signal control 0/4-20 mA
- Level control with input for two level signals.
- Pulse, analogue and remote on/off input
- Analogue output
- Alarm relay output
- Stroke output
- Input for dosing controller and diaphragm monitoring sensor
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Applies only to pumps with control variant: D3
- Automatic adjustment of stroke length via direct drive control or mA-input signal
- For further specifications please refer to servomotor
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