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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Omschrijving Prijs 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-stocknr. 705-9330
FabrikantnummerRLFP222202D
FabrikantXylem Flojet
€ 110,09
Each
Aantal stuks
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-stocknr. 702-6894
FabrikantRS PRO
€ 53,10
Each
Aantal stuks
Diaphragm Electric 150ml/min - 1 bar - - IP50 D200 +100°C Nylon 1.5 → 4.5 V 0.48W Nitrile, Nylon, Silicone
RS-stocknr. 705-9321
FabrikantnummerRLFP122202D
FabrikantXylem Flojet
€ 102,20
Each
Aantal stuks
Diaphragm Electric 3.8L/min 21m 2.5 bar 3/8 in Hose Barb 3/8 in Hose Barb - RLF122 +43°C PP 12 V dc 30W EPDM, PP, Santoprene, Stainless Steel, Viton
RS-stocknr. 446-3483
Fabrikantnummer416989
FabrikantXylem Flojet
€ 335,60
Each
Aantal stuks
Diaphragm Electric 3L/min 89m 20 bar - - IP44 AD +77°C - 230 V 55W -
RS-stocknr. 705-9327
FabrikantnummerRLF222201D
FabrikantXylem Flojet
€ 108,26
Each
Aantal stuks
Diaphragm Electric 3.8L/min 21m 2.5 bar 3/8 in Hose Barb 3/8 in Hose Barb - RLF222 +43°C PP 24 V dc 30W -
RS-stocknr. 705-6675
FabrikantnummerAU R2550060 RS1
FabrikantVerderflex
€ 184,46
Each
Aantal stuks
Peristaltic Electric 0.12L/min 10m 1 bar - - - R2550 +40°C ABS, PC 12 V dc 6VA -
RS-stocknr. 667-9093
FabrikantnummerR4300143A
FabrikantXylem Flojet
€ 301,23
Each
Aantal stuks
Diaphragm Electric 19L/min - 3.1 bar 3/4 in Hose Barb 3/4 in Hose Barb IP44 R4300 - PP 12 V dc - Buna, Elastomer, PP
RS-stocknr. 702-6898
FabrikantRS PRO
€ 70,33
Each
Aantal stuks
Diaphragm Electric 380ml/min - 11 psi - - IP50 D250 +100°C Aluminium 1.5 → 5 V 0.48W Anodized Aluminium, Nitrile, Silicone, Stainless Steel
RS-stocknr. 667-9116
FabrikantnummerG575215A
FabrikantXylem Flojet
€ 178,93
Each
Aantal stuks
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-stocknr. 705-6684
FabrikantnummerAU R2550030 RS1
FabrikantVerderflex
€ 184,46
Each
Aantal stuks
Peristaltic Electric 0.06L/min 10m 1 bar - - - R2550 +40°C ABS, PC 12 V dc 6W -
RS-stocknr. 667-9100
FabrikantnummerD3131H5011AR
FabrikantXylem Flojet
€ 171,98
Each
Aantal stuks
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-stocknr. 705-9352
FabrikantnummerR3811242A
FabrikantXylem Flojet
€ 250,76
Each
Aantal stuks
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-stocknr. 705-9324
FabrikantnummerRLFP122201D
FabrikantXylem Flojet
€ 102,07
Each
Aantal stuks
Diaphragm Electric 3.8L/min 21m 2.5 bar 3/8 in Hose Barb 3/8 in Hose Barb - RLF122 +43°C PP 12 V dc 30W EPDM, PP, Santoprene, Stainless Steel, Viton
RS-stocknr. 667-9107
FabrikantnummerCW474-024
FabrikantXylem
€ 383,58
Each
Aantal stuks
Diaphragm Electric 13L/min - 3 bar 1/2 in Hose Barb 1/2 in Hose Barb IP55 CW474 - Glass Fibre Reinforced PP 230 V ac 120W -
RS-stocknr. 121-8586
FabrikantnummerBT4B1601PVT2000U1110000
FabrikantProMinent
€ 1.088,33
Each
Aantal stuks
- 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-stocknr. 705-6659
FabrikantnummerAU ES3R16
FabrikantVerderflex
€ 130,60
Each
Aantal stuks
Peristaltic Electric - 20m 1 bar - - - ES3R1 +40°C Polyamide - 20W -
RS-stocknr. 705-6662
FabrikantnummerAU EZ3R16 100 02
FabrikantVerderflex
€ 315,13
Each
Aantal stuks
Peristaltic Electric 0.375L/min 20m 1 bar - - - EZ3R1 +40°C Polyamide 12 V dc 17W -
RS-stocknr. 667-9104
FabrikantnummerD3135H7011AR
FabrikantXylem Flojet
€ 287,06
Each
Aantal stuks
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-stocknr. 493-1920
Fabrikantnummer7043 RS
€ 212,68
Each
Aantal stuks
Drum Electric 40L/min 12m - - 3/4 in Plain - - - - 12 V dc - -
RS-stocknr. 705-6687
FabrikantnummerAU R2550015 RS1
FabrikantVerderflex
€ 184,46
Each
Aantal stuks
Peristaltic Electric 0.03L/min 10m 1 bar - - - R2550 +40°C ABS, PC 12 V dc 6VA -
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