Spring Return Mechanical Diaphragm Pump Type FM

Mechanical Diaphragm pumps are suitable for the applications in which: 
- the dosed liquid contains small amounts of suspended particles 
- the dosed liquid is a toxic solutions 
- a drip proof/air tight application is required 
- high pressures are not required 

Each pump is built with a standard gearbox reduction system and a vertically mounted B14 shaped electric motor in compliance with UNEL-MEC specifications. 

Motors power is usually 0,09 Kw with 4 poles: 3-phase 230/400 Volts 50/60 Hz, and single phase 230V/50 Hz or 110V/60 Hz. 

As the motors comply to UNEL-MEC specifications, there are many available options with different voltages, frequencies and insulation classes, whereas explosion proof versions are not allowed. 

The reduction gearbox is of a standard endless screw plus worm-wheel type, supported by bearings, fully lubricated in an oil-bath. 

The mechanism for the variation of the stroke length is a positive fore-stroke, spring return type, that is operated by an eccentric; this makes the diaphragm move forward (discharging phase) for all the stroke length, while the spring in continuous tension causes the comeback of the diaphragm (suction phase).