ProMinent – Sigma 3 Pump

The Sigma/3 motor diaphragm metering pumps are produced with a high-strength metal inner housing for parts subject to load as well as an additional plastic housing to protect against corrosion. The capacity range extends from 46 to 274.7 gph (174 – 1040 l/h_ and pressures up to 174 psig (12 bar). Stroke length is 0.24 inches.

Under defined conditions and when installed correctly, the reproducibility of the metering is better than a ±2% at a stroke length of between 30% and 100% (instructions in the operating instructions manual must be followed).

Also comes in a basic version.

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.