Prominent Sigma/2 Metering Pump S2BAHM07220PVTS000S000

The Prominent Sigma/2 series is a motor driven metering pump with a mechanically actuated diaphragm type liquid end (Sigma HM) or a packed plunger-type liquid end (Sigma HK). It is constructed of a rugged metal inner casing for components subjected to mechanical stress, and a corrosion resistant plastic outer housing. The standard materials for the liquid end are PVDF or 316 stainless steel, both with PTFE seals.

Sigma/2 HM pumps are designed with a convex DEVELOPAN diaphragm which seals to a concave curve in the liquid end. This allows for precise metering for media with various viscosities and reduces stress for long diaphragm life. Three gear ratios and two liquid end sizes provide maximum capacities ranging from 15.2 to 111 gph (57 to 420 L/H) (bacis) and 15.2 to 92.5 gph (57 to 350 L/h) (control) at maximum backpressures of 174 to 58 psig (12 to 4 bar). The capacity can be infinitely varied in steps of 0.5% by adjustment of the self-locking stroke length adjusting knob or via and optional stroke positioning motor. Maximum stroke length is 0.19 (5mm). Under defined conditions and with correct installation, the repeatability is better than ±2% in the stroke length range of between 30-100%.