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
New
RS Stock No. 195-3563
Mfr. Part No.DFXAEU0530SPTU0000U11130EN
BrandProMinent
HK$23,326.16
Each
units
Peristaltic - 30L/h 5m 5 bar - - - DFXA - PVDF 100 → 230 V 45W TPV
RS Stock No. 121-8595
Mfr. Part No.DLTA1612PVT2000U11131EN0
BrandProMinent
HK$22,426.54
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. 185-6148
Mfr. Part No.164.0001
BrandVerderflex
HK$1,487.13
Each
units
- - 375ml/min 86mm 1 bar - - - - - Nylon, Polycarbonate 24 V dc - -
RS Stock No. 705-9349
Mfr. Part No.R3811142A
HK$1,693.35
Each
units
Diaphragm Electric 5.5L/min 105m 10.5 bar 3/8 in NPT 3/8 in NPT - R381 +60°C Glass Fibre Reinforced Nylon 12 V 108W -
RS Stock No. 185-6149
Mfr. Part No.164.0049
BrandVerderflex
HK$1,487.13
Each
units
- - 375ml/min 86mm 1 bar - - - - - Nylon, Polycarbonate 24 V dc - -
New
RS Stock No. 195-3560
Mfr. Part No.GXLAEU1020PVT20000U11130EN
BrandProMinent
HK$23,252.49
Each
units
- - 20L/h 10m 10 bar - - - GXLa - PVDF 230 V 78W PVDF
RS Stock No. 185-6134
Mfr. Part No.164.0165
BrandVerderflex
HK$1,487.13
Each
units
- - 375ml/min 86mm 1 bar - - - - - Nylon, Polycarbonate 24 V dc - -
RS Stock No. 179-7496
Mfr. Part No.PNDB1601PVT2000001
BrandProMinent
HK$6,088.25
Each
units
- Air 1L/h - 16 bar - - - - - PVDF - - -
RS Stock No. 185-6130
Mfr. Part No.164.0147
BrandVerderflex
HK$1,487.13
Each
units
- - 375ml/min 86mm 1 bar - - - - - Nylon, Polycarbonate 24 V dc - -
RS Stock No. 185-6110
Mfr. Part No.162.1103
BrandVerderflex
HK$3,033.69
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 195-3557
Mfr. Part No.S1CBH07065PVTS070U111000EN
BrandProMinent
HK$29,441.30
Each
units
Diaphragm - 63L/h 7m 7 bar - - IP65 S1cb - PVDF 100 → 230 V 220W PVDF
RS Stock No. 185-6144
Mfr. Part No.164.0031
BrandVerderflex
HK$1,487.13
Each
units
- - 375ml/min 86mm 1 bar - - - - - Nylon, Polycarbonate 24 V dc - -
RS Stock No. 125-4036
Mfr. Part No.AU R1560055 01
BrandVerderflex
HK$4,369.10
Each
units
Peristaltic Electric 324ml/min - - - - - M1500 - ABS 24 V dc 30W -
RS Stock No. 121-8589
Mfr. Part No.BT4B0413PVT2000U1110000
BrandProMinent
HK$9,713.26
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. 121-8594
Mfr. Part No.GMXa0424PVT20000U11130EN
BrandProMinent
HK$17,459.27
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. 185-6147
Mfr. Part No.164.0048
BrandVerderflex
HK$1,487.13
Each
units
- - 375ml/min 86mm 1 bar - - - - - Nylon, Polycarbonate 24 V dc - -
RS Stock No. 121-8597
Mfr. Part No.DLTA0730PVT2000U11131EN0
BrandProMinent
HK$22,397.45
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. 125-4044
Mfr. Part No.AU M310125 02
BrandVerderflex
HK$6,300.03
Each
units
Peristaltic Electric 1800ml/min - - - - - R3DC - Aluminium 24 V 100W -
RS Stock No. 121-8596
Mfr. Part No.DLTA1020PVT2000U11131EN0
BrandProMinent
HK$14,308.01
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. 121-8603
Mfr. Part No.DF4A0W003060P0U120001210
BrandProMinent
HK$10,797.86
Each
units
Peristaltic Electric 6L/h - 2.5 bar - - IP65 DF4a +20°C - 100 to 240 V 24 (Consumption)W -
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