Prominent Sigma 3 Dosing Pump

Prominent Sigma 3 Dosing Pump (3)

The Sigma/3 diaphragm metering pumps, together with the Sigma/1 and Sigma/2 models, form a complete product range. They cover a flow range of 4.49 to 272.1 gpm (17 to 1,030 lpm) and are consistent in terms of operating concept, control philosophy and spare parts management. The range is available in a variety of power-end versions, including models for explosion-hazardous areas.

Promient Sigma 3 Dosing Pump
Promient Sigma 3 Dosing Pump
Promient Sigma 2 Dosing Pump
Promient Sigma 2 Dosing Pump
Prominent Sigma 1 Dosing Pump-01
Prominent Sigma 1 Dosing Pump-01


  • Stroke length adjustment range: 0 – 100%
  • With the right, constant conditions, correct installation, and calibration, precision exceeds ±1 %, based on maximum stroke volume.
  • Wetted materials: PVDF, stainless steel 1.4571/1.4404, special materials on request
  • Patented multi-layer safety diaphragm with optical diaphragm rupture display (as option with diaphragm rupture warning system via a contact).
  • Three-phase standard AC motor, 1-phase AC motor, motors for use in Exe and Exde areas, and different flange designs for use in customer-specific motors.
  • For areas at risk from explosion II 2G Ex h IIC T3 Gb X or II 2G Ex h IIC T4 Gb X (optional).
  • High-strength fibreglass-reinforced plastic housing with excellent chemical resistance.

Technical Parameter

TypePump capacity at max. back pressureSuction liftPerm. pre-pressure suction sideShipping
S3Bal/hpsiml/strokeStrokes/minm WCpsilb
120145 PVT17414533.78652948.5
120145 SST17417433.78652957.3
120190 PVT25114533.712452948.5
120190 SST25117433.712452957.3
120270 PVT35114533.817352948.5
120270 SST35117433.817352957.3
120330 PVT33.852948.5
120330 SST33.852957.3
070410 PVT49210295.18641552.9
070410 SST49210295.18641563.9
070580 PVT69610295.112441552.9
070580 SST69610295.112441563.9
040830 PVT1,0005895.117331552.9
040830 SST1,0005895.117331563.9
041030 PVT95.131552.9
041030 SST95.131563.9

Haosh is always at the forefront of innovation, constantly introducing new products and technologies to bring users a better experience.HAOSH HJ-D2 mechanical dosing pump can be a good replacement for Sigma 3 series, contact us for a quote.