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. 125-4036
Mfr. Part No.AU R1560055 01
BrandVerderflex
SGD745.34
Each
units
Peristaltic Electric 324ml/min - - - - - M1500 - ABS 24 V dc 30W -
RS Stock No. 144-844
Mfr. Part No.BL 5/D
SGD319.63
Each
units
Diaphragm Electric 5L/h - 101.5 psi - - IP65 BL5/D - Glass Fibre Reinforced PP 220 V, 240 V 200W -
RS Stock No. 179-7498
Mfr. Part No.PNDB0220PVT2000001
BrandProMinent
SGD1,202.78
Each
units
- Air 16.7L/h - 2 bar - - - - - PVDF - - -
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. 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. 185-6145
Mfr. Part No.164.0032
BrandVerderflex
SGD259.26
Each
units
- - 375ml/min 86mm 1 bar - - - - - Nylon, Polycarbonate 24 V dc - -
RS Stock No. 195-3558
Mfr. Part No.S1CBH04120PVTS070U111000EN
BrandProMinent
SGD5,358.27
Each
units
Diaphragm - 117L/h 4m 4 bar - - IP65 S1cb - PVDF 100 → 230 V 220W PVDF
RS Stock No. 121-8602
Mfr. Part No.DF4A0W004015P0U120001210
BrandProMinent
SGD1,956.75
Each
units
Peristaltic Electric 1.5L/h - 4 bar - - IP65 DF4a +20°C - 100 to 240 V 24 (Consumption)W -
RS Stock No. 196-1157
Mfr. Part No.PB1013A-F01
BrandSMC
SGD346.03
Each
units
- Air 40L/min 2.5m 0.7 MPa - - - PB1000A +50°C - - - Polypropylene, Stainless Steel
RS Stock No. 179-7497
Mfr. Part No.PNDB0708PVT2000001
BrandProMinent
SGD1,202.68
Each
units
- Air 6.3L/h - 7 bar - - - - - PVDF - - -
RS Stock No. 180-9203
Mfr. Part No.S1CBH07065PVTS070UA110S0EN
BrandProMinent
SGD5,306.65
Each
units
Diaphragm Electric 65L/h - 7 bar DN 10 1-3/4 in G IP55, IP65 S1Cb +100 °C @ 15 min (2 bar) PVDF 100 → 230 V ac - PVDF
RS Stock No. 121-8595
Mfr. Part No.DLTA1612PVT2000U11131EN0
BrandProMinent
SGD4,104.24
Each
units
- Electric 11.3L/h - 16 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. 125-4046
Mfr. Part No.AU M310240 12
BrandVerderflex
SGD1,098.34
Each
units
Peristaltic Electric 3400ml/min - - - - - R3DC - Aluminium 24 V 100W -
RS Stock No. 185-6129
Mfr. Part No.164.0146
BrandVerderflex
SGD282.50
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. 185-6128
Mfr. Part No.164.0131
BrandVerderflex
SGD282.50
Each
units
- - - - - - - - - - - - - -
RS Stock No. 121-8590
Mfr. Part No.BT4B0220PVT2000U1110000
BrandProMinent
SGD1,693.40
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. 125-4045
Mfr. Part No.AU M380240 15
BrandVerderflex
SGD1,098.34
Each
units
Peristaltic Electric 3.4L/min - - - - - R3DC - Aluminium 24 V dc 100 -
RS Stock No. 185-6126
Mfr. Part No.164.0129
BrandVerderflex
SGD259.26
Each
units
- - - - - - - - - - - - - -
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 -
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