ProMinent – Sigma 2 Pump

The Sigma/2 motor diaphragm metering pumps are built with a robust metal inner housing for load-bearing components and an additional plastic outer housing for corrosion protection. They offer a capacity range of 14.7 to 111 gph (56 to 420 l/h) and operate at pressures up to 232 psig (16 bar), with a stroke length of 0.20 inches.

When properly installed and operated under defined conditions, these pumps deliver metering reproducibility better than ±2% at stroke lengths between 30% and 100%, as detailed in the operating manual.

A basic version is also available.

Features:
The chemical feed does not escape to the outside nor into the pump’s power end in the event of an accident, thanks to a multi-layer safety diaphragm with optical signaling.
An integrated relief valve protects the pump against overload.
Offers reliable operation by bleed option during the suction process.