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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Beskrivning Pris 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-artikelnummer 702-6894
VarumärkeRS PRO
542,73 kr
Each
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Diaphragm Electric 150ml/min - 1 bar - - IP50 D200 +100°C Nylon 1.5 → 4.5 V 0.48W Nitrile, Nylon, Silicone
RS-artikelnummer 702-6898
VarumärkeRS PRO
718,83 kr
Each
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Diaphragm Electric 380ml/min - 11 psi - - IP50 D250 +100°C Aluminium 1.5 → 5 V 0.48W Anodized Aluminium, Nitrile, Silicone, Stainless Steel
RS-artikelnummer 667-9116
Tillv. art.nrG575215A
VarumärkeXylem Flojet
1 775,54 kr
Each
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Diaphragm Air 19L/min - 8.27 bar 1/2 in Hose Barb, 1/4 in Hose Barb 1/2 in Hose Barb, 1/4 in Hose Barb - G5752 - PP - - Hastelloy C, Kalrez, PP, Santoprene, Viton
RS-artikelnummer 493-1920
Tillv. art.nr7043 RS
2 199,16 kr
Each
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Drum Electric 40L/min 12m - - 3/4 in Plain - - - - 12 V dc - -
RS-artikelnummer 705-9359
Tillv. art.nrR3521339A
VarumärkeXylem Flojet
2 379,24 kr
Each
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Diaphragm Electric 7.6L/min 41m 4.1 bar 3/4 in NPT 3/8 in NPT - R352 +60°C PP 24 V 144W -
RS-artikelnummer 705-9330
Tillv. art.nrRLFP222202D
VarumärkeXylem Flojet
1 092,46 kr
Each
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Diaphragm Electric 3.8L/min 25m 2.4 bar 3/8 in Hose Barb 3/8 in Hose Barb - RLF222 +43°C PP 24 V dc 30W -
RS-artikelnummer 446-3483
Tillv. art.nr416989
VarumärkeXylem Flojet
3 330,17 kr
Each
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Diaphragm Electric 3L/min 89m 20 bar - - IP44 AD4/90 +77°C - 230 V 55W -
RS-artikelnummer 667-9113
Tillv. art.nrG573215A
VarumärkeXylem Flojet
2 554,66 kr
Each
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Diaphragm Air 19L/min - 6.9 bar 1/2 in Hose Barb, 1/4 in Hose Barb 1/2 in Hose Barb, 1/4 in Hose Barb - G5732 +48.9°C PP - - Hastelloy C, Kalrez, PP, Santoprene, Viton
RS-artikelnummer 705-9352
Tillv. art.nrR3811242A
VarumärkeXylem Flojet
2 488,31 kr
Each
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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-artikelnummer 705-6653
Tillv. art.nrAU EZ3R16 150 02
VarumärkeVerderflex
3 127,02 kr
Each
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Peristaltic Electric 0.562L/min 20m 1 bar - - - EZ3R1 +40°C Polyamide 12 V dc 20W -
RS-artikelnummer 667-9097
Tillv. art.nrR4300242A
VarumärkeXylem Flojet
3 372,17 kr
Each
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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 - -
RS-artikelnummer 705-6669
Tillv. art.nrAU UV EZ
VarumärkeVerderflex
16 817,45 kr
Each
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Peristaltic Electric 0.937L/min 10m 1 bar - - IP40 UV-EZ +40°C Polyamide 100 → 120 V, 220 → 240 V 100VA -
RS-artikelnummer 122-6648
Tillv. art.nrTEP50-ANB-D
VarumärkeTecnomatic
9 486,76 kr
Each
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Diaphragm Air 50L/min 8m - - - - TEP50 - Aluminium - - Aluminium Body, NBR Diaphragms, NBR Valve Balls
RS-artikelnummer 144-850
Tillv. art.nrBL 10/D
VarumärkeHanna Instruments
2 011,37 kr
Each
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Diaphragm Electric 10.8L/h - 43.5 psi - - IP65 BL10/D - Glass Fibre Reinforced PP 220 V, 240 V 200W -
RS-artikelnummer 144-844
Tillv. art.nrBL 5/D
VarumärkeHanna Instruments
1 856,33 kr
Each
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Diaphragm Electric 5L/h - 101.5 psi - - IP65 BL5/D - Glass Fibre Reinforced PP 220 V, 240 V 200W -
RS-artikelnummer 705-6678
Tillv. art.nrAU EV EZ
VarumärkeVerderflex
12 152,22 kr
Each
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Peristaltic Electric 0.6L/min 20m 1 bar - - IP40 EV-EZ +40°C Polyamide 100 → 120 V, 220 → 240 V 100VA -
RS-artikelnummer 446-3506
Tillv. art.nr416990
VarumärkeXylem Flojet
4 010,89 kr
Each
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Diaphragm Electric 10.8L/min 28m 15 bar 1/2 in NPT 1/2 in NPT IP44 AD550 +60°C - 230 V 33W -
RS-artikelnummer 705-6662
Tillv. art.nrAU EZ3R16 100 02
VarumärkeVerderflex
3 127,02 kr
Each
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Peristaltic Electric 0.375L/min 20m 1 bar - - - EZ3R1 +40°C Polyamide 12 V dc 17W -
RS-artikelnummer 126-0251
Tillv. art.nrPA3120-F03
VarumärkeSMC
5 393,76 kr
Each
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- - - - - - - - - - - - - -
RS-artikelnummer 667-9182
Tillv. art.nrTEP130-PX
VarumärkeTecnomatic
9 299,01 kr
Each
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Diaphragm Air 132L/min 80m - 1 in Push Fit 1 in Push Fit - TEP132 - PP - - -
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