„SD” Series - Sandwich Hydraulic diaphragm metering pumps are normally used when:
- The dosed liquid contains small amounts of suspended solids
- No leakage are accepted
- The dosed liquid is a toxic solution
- High pressure is required
Each pump is fitted with a standard gearbox reduction system with a vertical mounted motor. The reduction gearbox is of a standard endless screw plus worm-wheel type, supported by bearing, fully lubricated in oil bath.
Stroke adjustment can be carried with the pump at rest or in operation and it can be manual or automatic through automatic actuator driven by 4-20 mA; different BUS; pneumatic. A built-in safety valve is installed in the hydraulic circuit, in order to protect the diaphragm against over pressure.
The peculiarity of this pump is the special sandwich diaphragm and the reliability of the diaphragm rupture detection system.
Furthermore they comply with ATEX standard, therefore they can be installed in Hazardous area.