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. 185-6136
Mfr. Part No.164.0166
BrandVerderflex
SGD282.50
Each
units
- - 375ml/min 86mm 1 bar - - - - - Nylon, Polycarbonate 24 V dc - -
RS Stock No. 144-866
Mfr. Part No.BL 15/D
SGD328.11
Each
units
Diaphragm Electric 15.2L/h - 14.5 psi - - IP65 BL15/D - Glass Fibre Reinforced PP 220 V, 240 V 200W -
RS Stock No. 185-6112
Mfr. Part No.162.1123
BrandVerderflex
SGD576.30
Each
units
- - - - - - - - - - - - - -
RS Stock No. 185-6153
Mfr. Part No.169.6017
BrandVerderflex
SGD134.82
Each
units
- - - - - - - - - - - - - -
RS Stock No. 185-6155
Mfr. Part No.169.6021
BrandVerderflex
SGD134.82
Each
units
- - - - - - - - - - - - - -
RS Stock No. 185-6147
Mfr. Part No.164.0048
BrandVerderflex
SGD282.50
Each
units
- - 375ml/min 86mm 1 bar - - - - - Nylon, Polycarbonate 24 V dc - -
RS Stock No. 185-6138
Mfr. Part No.164.0012
BrandVerderflex
SGD282.50
Each
units
- - - - - - - - - - - - - -
RS Stock No. 185-6154
Mfr. Part No.169.6020
BrandVerderflex
SGD134.82
Each
units
- - - - - - - - - - - - - -
RS Stock No. 185-6146
Mfr. Part No.164.0047
BrandVerderflex
SGD259.26
Each
units
- - 375ml/min 86mm 1 bar - - - - - Nylon, Polycarbonate 24 V dc - -
RS Stock No. 195-3556
Mfr. Part No.S1CBH12035PVTS070U111000EN
BrandProMinent
SGD5,106.22
Each
units
Diaphragm - 42L/h 10m 10 bar - - IP65 S1cb - PVDF 100 → 230 V 220W PVDF
RS Stock No. 185-6139
Mfr. Part No.164.0013
BrandVerderflex
SGD282.50
Each
units
- - - - - - - - - - - - - -
RS Stock No. 705-6671
Mfr. Part No.AU R2550120 RS1
BrandVerderflex
SGD323.27
Each
units
Peristaltic Electric 0.24L/min 10m 1 bar - - - R2550 +40°C ABS, PC 12 V dc 6VA -
RS Stock No. 705-6662
Mfr. Part No.AU EZ3R16 100 02
BrandVerderflex
SGD536.72
Each
units
Peristaltic Electric 0.375L/min 20m 1 bar - - - EZ3R1 +40°C Polyamide 12 V dc 17W -
RS Stock No. 125-4037
Mfr. Part No.AU R1580055 01
BrandVerderflex
SGD761.70
Each
units
Peristaltic Electric 518ml/min - - - - - M1500 - ABS 24 V dc 30W -
RS Stock No. 763-2480
Mfr. Part No.G70K202A
SGD564.24
Each
units
Diaphragm Air 18.9L/min - 100 psi 6 mm Hose 9.5 mm to 15 mm Hose - G70K +49°C PP - - -
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. 196-1156
Mfr. Part No.PA3120-03
BrandSMC
SGD1,023.69
Each
units
- Automatically Operated 200L/min - 0.7 MPa - - - PA3000 +60°C - - - ADC12 (Aluminium)
RS Stock No. 121-8589
Mfr. Part No.BT4B0413PVT2000U1110000
BrandProMinent
SGD1,693.40
Each
units
- Electric 12.3L/h - 4 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. 705-6687
Mfr. Part No.AU R2550015 RS1
BrandVerderflex
SGD328.12
Each
units
Peristaltic Electric 0.03L/min 10m 1 bar - - - R2550 +40°C ABS, PC 12 V dc 6VA -
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