Positive Displacement Pumps

Positive displacement pumps are speciality pumps that provide an approximate constant flow of fluid at the fixed speed. Pump trap a fixed amount of the fluid and then force it into a discharge pipe. Positive displacement pumps can produce the same flow at a given speed (RPM) no matter what the discharge pressure is. These type of pumps cannot operate against the closed valve because they have no shutoff head like centrifugal pumps. Positive displacement pumps constantly produce flow and the pressure built within the blocked line will damage the line, pump or both.

The positive displacement pumps can be divided into two main categories: reciprocating positive displacement pumps and rotary pumps.

Rotary pumps are very efficient because they can operate even with highly viscous fluids but require a slow steady speed rotation. If the mechanism rotation is too fast, the fluid can cause erosion, which eventually causes enlarged clearances that liquid can pass through and reduce pressure.

Rotary pumps can be divided into three main types:

  • Gear pumps: the simplest pump type that pumps liquid using 2 gears.
  • Screw pumps: more complicated pump type where the two screws are positioned against each other to pump the liquid.
  • Rotary vane pumps: these pumps have a cylindrical rotary engine. As the rotor circulates, vans trap fluid between the rotor and the engine housing, pushing the liquid through the pump.

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Description Price Pump Type Drive Type Maximum Flow Rate Maximum Head Maximum Working Pressure Input Connection Output Connection IP Rating Series Maximum Fluid Temperature Body Material Supply Voltage Input Power Wetted Materials
RS Stock No. 121-8600
Mfr. Part No.DF2A0224P00A10W1
BrandProMinent
TWD14,729.00
Each
units
Peristaltic Electric 2.4L/h - 1.5 bar - - IP65 DF2a +20°C - 230 V 5 (Consumption)W -
RS Stock No. 185-6147
Mfr. Part No.164.0048
BrandVerderflex
TWD5,850.00
Each
units
- - 375ml/min 86mm 1 bar - - - - - Nylon, Polycarbonate 24 V dc - -
RS Stock No. 122-6644
Mfr. Part No.T240-ANB-D
BrandTecnomatic
TWD71,091.00
Each
units
Diaphragm Air 240L/min 8.5m - - - - T240 - Aluminium - - Aluminium Body, NBR Diaphragms, NBR Valve Balls
RS Stock No. 185-6143
Mfr. Part No.164.0030
BrandVerderflex
TWD5,850.00
Each
units
- - 375ml/min 86mm 1 bar - - - - - Nylon, Polycarbonate 24 V dc - -
RS Stock No. 185-6151
Mfr. Part No.169.6015
BrandVerderflex
TWD3,042.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 705-9374
Mfr. Part No.53020-2013
TWD15,955.00
Each
units
Centrifugal Electric 18L/min 15m 1.7 bar 3/4 in BSP 3/4 in BSP IP54 - - Bronze 230 V 180W -
RS Stock No. 179-7498
Mfr. Part No.PNDB0220PVT2000001
BrandProMinent
TWD26,932.00
Each
units
- Air 16.7L/h - 2 bar - - - - - PVDF - - -
RS Stock No. 121-8596
Mfr. Part No.DLTA1020PVT2000U11131EN0
BrandProMinent
TWD91,183.00
Each
units
- Electric 19.1L/h - 10 bar 3/4 in G 3/4 in G IP65 DLTa +20°C PVDF 100 to 230 V 78 (Consumption)W PVDF
RS Stock No. 121-8594
Mfr. Part No.GMXa0424PVT20000U11130EN
BrandProMinent
TWD68,676.00
Each
units
- Electric 24L/h - 4 bar 3/4 in G 3/4 in G IP65 GMXa +20°C PVDF 100 to 230 V 24 / 30 (Consumption)W PVDF
RS Stock No. 705-9333
Mfr. Part No.R3711132A
TWD5,790.00
Each
units
Diaphragm Electric 5.5L/min 69m 6.9 bar 3/8 in BSP 3/8 in BSP - R371 +60°C Glass Fibre Reinforced Nylon 12 V dc 108W -
RS Stock No. 125-4036
Mfr. Part No.AU R1560055 01
BrandVerderflex
TWD17,186.00
Each
units
Peristaltic Electric 324ml/min - - - - - M1500 - ABS 24 V dc 30W -
RS Stock No. 185-6109
Mfr. Part No.162.1098
BrandVerderflex
TWD11,890.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 196-1157
Mfr. Part No.PB1013A-F01
BrandSMC
TWD7,807.00
Each
units
- Air 40L/min 2.5m 0.7 MPa - - - PB1000A +50°C - - - Polypropylene, Stainless Steel
RS Stock No. 185-6153
Mfr. Part No.169.6017
BrandVerderflex
TWD3,031.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 179-7497
Mfr. Part No.PNDB0708PVT2000001
BrandProMinent
TWD26,930.00
Each
units
- Air 6.3L/h - 7 bar - - - - - PVDF - - -
RS Stock No. 705-9330
Mfr. Part No.RLFP222202D
TWD3,567.00
Each
units
Diaphragm Electric 3.8L/min 25m 2.4 bar 3/8 in Hose Barb 3/8 in Hose Barb - RLF222 +43°C PP 24 V dc 30W -
RS Stock No. 705-9355
Mfr. Part No.R3521139A
TWD7,274.00
Each
units
Diaphragm Electric 15.1L/min 41m 4.1 bar 1/2 in Hose Barb 1/2 in Hose Barb IP54 R352 +60°C PP 12 V 108W -
RS Stock No. 446-3506
Mfr. Part No.416990
TWD16,348.00
Each
units
Diaphragm Electric 10.8L/min 28m 15 bar 1/2 in NPT 1/2 in NPT IP44 AD550 +60°C - 230 V 33W -
RS Stock No. 185-6142
Mfr. Part No.164.0029
BrandVerderflex
TWD5,828.00
Each
units
- - 375ml/min 86mm 1 bar - - - - - Nylon, Polycarbonate 24 V dc - -
RS Stock No. 185-6120
Mfr. Part No.163.0001
BrandVerderflex
TWD4,756.00
Each
units
- - - - - - - - - - - - - -