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:
A. 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. 121-8603
Mfr. Part No.DF4A0W003060P0U120001210
BrandProMinent
£958.20
Each
Units
Peristaltic Electric 6L/h - 2.5 bar - - IP65 DF4a +20°C - 100 to 240 V 24 (Consumption)W -
RS Stock No. 122-6644
Mfr. Part No.T240-ANB-D
BrandTecnomatic
£1,603.81
Each
Units
Diaphragm Air 240L/min 8.5m - - - - T240 - Aluminium - - Aluminium Body, NBR Diaphragms, NBR Valve Balls
RS Stock No. 763-2471
Mfr. Part No.G57C202A
£259.11
Each
Units
Diaphragm Air 19L/min - 100 psi 1/4 in Hose Barb 3/8 in Hose Barb - G57C +49°C PP - - Hasteloy C, PP, Santoprene, Viton
RS Stock No. 705-6678
Mfr. Part No.AU EV EZ
BrandVerderflex
£1,080.75
Each
Units
Peristaltic Electric 0.6L/min 20m 1 bar - - IP40 EV-EZ +40°C Polyamide 100 → 120 V, 220 → 240 V 100VA -
RS Stock No. 125-4036
Mfr. Part No.AU R1560055 01
BrandVerderflex
£387.71
Each
Units
Peristaltic Electric 324ml/min - - - - - M1500 - ABS 24 V dc 30W -
RS Stock No. 705-6669
Mfr. Part No.AU UV EZ
BrandVerderflex
£1,436.26
Each
Units
Peristaltic Electric 0.937L/min 10m 1 bar - - IP40 UV-EZ +40°C Polyamide 100 → 120 V, 220 → 240 V 100VA -
RS Stock No. 125-4044
Mfr. Part No.AU M310125 02
BrandVerderflex
£559.06
Each
Units
Peristaltic Electric 1800ml/min - - - - - R3DC - Aluminium 24 V 100W -
RS Stock No. 121-8593
Mfr. Part No.GMXa0414PVT20000U11130EN
BrandProMinent
£1,222.04
Each
Units
- Electric 14L/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. 121-8590
Mfr. Part No.BT4B0220PVT2000U1110000
BrandProMinent
£861.95
Each
Units
- Electric 19L/h - 2 bar 3/4 in G 3/4 in G IP65 BT4B +20°C PVDF 100 to 230 V 15.2 (Consumption)W PVDF
RS Stock No. 121-8592
Mfr. Part No.GMXa0708PVT20000U11130EN
BrandProMinent
£1,251.13
Each
Units
- Electric 7.6L/h - 7 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. 121-8596
Mfr. Part No.DLTA1020PVT2000U11131EN0
BrandProMinent
£2,016.76
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. 125-4037
Mfr. Part No.AU R1580055 01
BrandVerderflex
£387.71
Each
Units
Peristaltic Electric 518ml/min - - - - - M1500 - ABS 24 V dc 30W -
RS Stock No. 125-4040
Mfr. Part No.AU R1560240 01
BrandVerderflex
£387.71
Each
Units
Peristaltic Electric 1300ml/min - - - - - M1500 - ABS 24 V dc 30W -
RS Stock No. 126-0253
Mfr. Part No.PA3210-F03
BrandSMC
£718.65
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 125-4049
Mfr. Part No.148.1021
BrandVerderflex
£1,871.42
Each
Units
Peristaltic Electric 1310ml/min - - 8 mm Tube - - Vantage 3000 - - 85 → 265 V ac - -
RS Stock No. 125-4038
Mfr. Part No.AU R1560125 01
BrandVerderflex
£387.71
Each
Units
Peristaltic Electric 800ml/min - - - - - M1500 - ABS 24 V dc 30W -
RS Stock No. 125-4039
Mfr. Part No.AU R1580125 09
BrandVerderflex
£331.00
Each
Units
Peristaltic Electric 1200ml/min - - - - - M1500 - ABS 24 V dc 30W -
RS Stock No. 185-6140
Mfr. Part No.164.0014
BrandVerderflex
£82.50
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 185-6132
Mfr. Part No.164.0149
BrandVerderflex
£82.50
Each
Units
- - 375ml/min 86mm 1 bar - - - - - Nylon, Polycarbonate 24 V dc - -
RS Stock No. 185-6142
Mfr. Part No.164.0029
BrandVerderflex
£82.50
Each
Units
- - 375ml/min 86mm 1 bar - - - - - Nylon, Polycarbonate 24 V dc - -