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. 125-4040
Mfr. Part No.AU R1560240 01
BrandVerderflex
MYR2,535.45
Each
units
Peristaltic Electric 1300ml/min - - - - - M1500 - ABS 24 V dc 30W -
RS Stock No. 705-6678
Mfr. Part No.AU EV EZ
BrandVerderflex
MYR7,067.58
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. 144-838
Mfr. Part No.BL 20/D
MYR1,128.15
Each
units
Diaphragm Electric 18.3L/h - 7.3 psi - - IP65 BL20/D - Glass Fibre Reinforced PP 220 V, 240 V 200W -
RS Stock No. 667-9104
Mfr. Part No.D3135H7011AR
MYR935.26
Each
units
Diaphragm Electric 8.1L/min 30m 7.1 bar 3/8 in NPT 3/8 in NPT IP44 D3135 - Glass Fibre Reinforced PP 12 V - -
RS Stock No. 125-4036
Mfr. Part No.AU R1560055 01
BrandVerderflex
MYR2,535.45
Each
units
Peristaltic Electric 324ml/min - - - - - M1500 - ABS 24 V dc 30W -
RS Stock No. 121-8603
Mfr. Part No.DF4A0W003060P0U120001210
BrandProMinent
MYR6,266.15
Each
units
Peristaltic Electric 6L/h - 2.5 bar - - IP65 DF4a +20°C - 100 to 240 V 24 (Consumption)W -
RS Stock No. 446-3506
Mfr. Part No.416990
MYR2,411.78
Each
units
Diaphragm Electric 10.8L/min 28m 15 bar 1/2 in NPT 1/2 in NPT IP44 AD550 +60°C - 230 V 33W -
RS Stock No. 705-9374
Mfr. Part No.53020-2013
MYR2,353.82
Each
units
Centrifugal Electric 18L/min 15m 1.7 bar 3/4 in BSP 3/4 in BSP IP54 - - Bronze 230 V 180W -
RS Stock No. 667-9100
Mfr. Part No.D3131H5011AR
MYR947.18
Each
units
Diaphragm Electric 5.3L/min 30m 4.2 bar 3/8 in NPT 3/8 in NPT IP44 D3131 +54°C Glass Filled PP 12 V dc - -
RS Stock No. 705-9343
Mfr. Part No.R3811342A
MYR1,003.41
Each
units
Diaphragm Electric 5.3L/min 105m 10.5 bar 3/8 in NPT 3/8 in NPT - R381 +60°C Glass Fibre Reinforced Nylon 24 V 108W -
RS Stock No. 667-9194
Mfr. Part No.TEP50PTWD
BrandTecnomatic
MYR3,913.60
Each
units
Diaphragm Air 53L/min 70m - 1/2 in G 1/2 in G - TE53-PTW - PP - - -
RS Stock No. 705-6669
Mfr. Part No.AU UV EZ
BrandVerderflex
MYR9,392.45
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. 705-6675
Mfr. Part No.AU R2550060 RS1
BrandVerderflex
MYR1,076.05
Each
units
Peristaltic Electric 0.12L/min 10m 1 bar - - - R2550 +40°C ABS, PC 12 V dc 6VA -
RS Stock No. 121-8586
Mfr. Part No.BT4B1601PVT2000U1110000
BrandProMinent
MYR5,405.28
Each
units
- Electric 1.1L/h - 16 bar 3/4 in G 3/4 in G IP65 BT4B +20°C PVDF 100 to 230 V 9.6 (Consumption)W PVDF
RS Stock No. 122-6648
Mfr. Part No.TEP50-ANB-D
BrandTecnomatic
MYR4,281.27
Each
units
Diaphragm Air 50L/min 8m - - - - TEP50 - Aluminium - - Aluminium Body, NBR Diaphragms, NBR Valve Balls
RS Stock No. 667-9182
Mfr. Part No.TEP130-PX
BrandTecnomatic
MYR4,801.90
Each
units
Diaphragm Air 132L/min 80m - 1 in Push Fit 1 in Push Fit - TEP132 - PP - - -
RS Stock No. 705-9352
Mfr. Part No.R3811242A
MYR1,381.15
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 230 V - -
RS Stock No. 705-6684
Mfr. Part No.AU R2550030 RS1
BrandVerderflex
MYR1,092.19
Each
units
Peristaltic Electric 0.06L/min 10m 1 bar - - - R2550 +40°C ABS, PC 12 V dc 6W -
RS Stock No. 121-8592
Mfr. Part No.GMXa0708PVT20000U11130EN
BrandProMinent
MYR8,181.79
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. 667-9097
Mfr. Part No.R4300242A
MYR1,166.29
Each
units
Diaphragm Electric 12L/min 40m 2.1 bar 1/2 in Hose Barb 1/2 in Hose Barb IP44 R4300 +54°C Glass Fibre Reinforced PP 230 V ac - -
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