Spring Return - Type SD Sandwich Hydraulic Diaphragm

Series SR - Type SD - Sandwich hydraulic diaphragm

"SD" type sandwich hydraulic diaphragm metering pumps are suitable for use when the liquid to dose contains small suspended solids and when piston lackage are not accepted. Is included on the pump a safety valve for guarantee the diaphragm security against over pressure .The characeristics of this pump is the special sandwich diaphragm and the reliable rupture detention specifically for industrial application.The gearbox is a standard wormwheel reduction system coupled with a vertical mounted B14 shaped electric motor in accordance with UNEL-MEC specification. The mechanism for variation of the stroke length is a positive stroke spring return operated by an eccentric. Stroke adjustment can be done manually, electrically (4-20mA; Profibus) and pneumatically. Different multiple head units are available on request. All the series can be ATEX certified.


Max. Capacity

Max. Pressure


108 Lt/h 14 Bar


418 Lt/h 14 Bar


1068 Lt/h 11 Bar


 Some standard  execution 05 03 11
 Pump head S.S.316 PVC PP
 Piston S.S.420 S.S.420 S.S.420
 Piston gasket AU/NBR AU/NBR AU/NBR
 Oil chamber All. All. All.
 Valve seat S.S.316 PVC PP
 Valve ball S.S.316 PYREX PYREX