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. 185-6152
Mfr. Part No.169.6016
BrandVerderflex
SGD146.90
Each
units
- - - - - - - - - - - - - -
RS Stock No. 125-4039
Mfr. Part No.AU R1580125 09
BrandVerderflex
SGD650.29
Each
units
Peristaltic Electric 1200ml/min - - - - - M1500 - ABS 24 V dc 30W -
RS Stock No. 185-6120
Mfr. Part No.163.0001
BrandVerderflex
SGD211.55
Each
units
- - - - - - - - - - - - - -
RS Stock No. 185-6125
Mfr. Part No.164.0128
BrandVerderflex
SGD282.50
Each
units
- - - - - - - - - - - - - -
RS Stock No. 185-6109
Mfr. Part No.162.1098
BrandVerderflex
SGD528.89
Each
units
- - - - - - - - - - - - - -
RS Stock No. 126-0251
Mfr. Part No.PA3120-F03
BrandSMC
SGD850.36
Each
units
- - - - - - - - - - - - - -
RS Stock No. 121-8598
Mfr. Part No.DF2A0208P00A10W1
BrandProMinent
SGD541.23
Each
units
Peristaltic Electric 0.8L/h - 1.5 bar - - IP65 DF2a +20°C - 230 V 5 (Consumption)W -
RS Stock No. 121-8593
Mfr. Part No.GMXa0414PVT20000U11130EN
BrandProMinent
SGD2,400.83
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. 180-9204
Mfr. Part No.S1CBH04120PVTS070UA110S0EN
BrandProMinent
SGD5,265.23
Each
units
Diaphragm Electric 120L/h - 4 bar DN 15 1 in G IP55, IP65 S1Cb +100 °C @ 15 min (2 bar) PVDF 100 → 230 V ac - PVDF
RS Stock No. 125-4044
Mfr. Part No.AU M310125 02
BrandVerderflex
SGD1,098.34
Each
units
Peristaltic Electric 1800ml/min - - - - - R3DC - Aluminium 24 V 100W -
RS Stock No. 185-6134
Mfr. Part No.164.0165
BrandVerderflex
SGD259.26
Each
units
- - 375ml/min 86mm 1 bar - - - - - Nylon, Polycarbonate 24 V dc - -
RS Stock No. 185-6127
Mfr. Part No.164.0130
BrandVerderflex
SGD282.50
Each
units
- - - - - - - - - - - - - -
RS Stock No. 185-6148
Mfr. Part No.164.0001
BrandVerderflex
SGD282.50
Each
units
- - 375ml/min 86mm 1 bar - - - - - Nylon, Polycarbonate 24 V dc - -
RS Stock No. 121-8603
Mfr. Part No.DF4A0W003060P0U120001210
BrandProMinent
SGD1,882.48
Each
units
Peristaltic Electric 6L/h - 2.5 bar - - IP65 DF4a +20°C - 100 to 240 V 24 (Consumption)W -
RS Stock No. 185-6150
Mfr. Part No.169.6014
BrandVerderflex
SGD146.90
Each
units
- - - - - - - - - - - - - -
RS Stock No. 185-6158
Mfr. Part No.169.6023
BrandVerderflex
SGD146.90
Each
units
- - - - - - - - - - - - - -
RS Stock No. 121-8597
Mfr. Part No.DLTA0730PVT2000U11131EN0
BrandProMinent
SGD3,904.74
Each
units
- Electric 29.2L/h - 7 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. 121-8587
Mfr. Part No.BT4B1604PVT2000U1110000
BrandProMinent
SGD1,672.58
Each
units
- Electric 3.6L/h - 16 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. 185-6130
Mfr. Part No.164.0147
BrandVerderflex
SGD259.26
Each
units
- - 375ml/min 86mm 1 bar - - - - - Nylon, Polycarbonate 24 V dc - -
RS Stock No. 185-6131
Mfr. Part No.164.0148
BrandVerderflex
SGD259.26
Each
units
- - 375ml/min 86mm 1 bar - - - - - Nylon, Polycarbonate 24 V dc - -
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