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: reciprocating positive displacement pumps and rotary pumps.

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 Prix 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
N° de stock RS 667-9097
Référence fabricantR4300242A
MarqueXylem Flojet
419,60 €
Each
Unité
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 - -
N° de stock RS 705-9355
Référence fabricantR3521139A
MarqueXylem Flojet
231,70 €
Each
Unité
Diaphragm Electric 15.1L/min 41m 4.1 bar 1/2 in Hose Barb 1/2 in Hose Barb IP54 R352 +60°C PP 12 V 108W -
N° de stock RS 702-6894
MarqueRS PRO
53,80 €
Each
Unité
Diaphragm Electric 150ml/min - 1 bar - - IP50 D200 +100°C Nylon 1.5 → 4.5 V 0.48W Nitrile, Nylon, Silicone
N° de stock RS 702-6898
MarqueRS PRO
71,23 €
Each
Unité
Diaphragm Electric 380ml/min - 11 psi - - IP50 D250 +100°C Aluminium 1.5 → 5 V 0.48W Anodized Aluminium, Nitrile, Silicone, Stainless Steel
N° de stock RS 705-9383
Référence fabricant53041-2003-230
MarqueXylem Jabsco
849,62 €
Each
Unité
Impeller Electric 35L/min 16m - 1 in BSP 1 in BSP IP54 - - Bronze 230 V 300W -
N° de stock RS 121-8586
Référence fabricantBT4B1601PVT2000U1110000
MarqueProMinent
1.121,20 €
Each
Unité
- 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
N° de stock RS 705-9393
Référence fabricant53081-2003-230
MarqueXylem Jabsco
1.000,44 €
Each
Unité
Centrifugal Electric 80L/min 20m - 1-1/2 in BSP 1-1/2 in BSP IP55 - - Bronze 230 V ac 550W -
N° de stock RS 493-1920
Référence fabricant7043 RS
237,46 €
Each
Unité
Drum Electric 40L/min 12m - - 3/4 in Plain - - - - 12 V dc - -
N° de stock RS 705-9327
Référence fabricantRLF222201D
MarqueXylem Flojet
115,40 €
Each
Unité
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 -
N° de stock RS 705-6684
Référence fabricantAU R2550030 RS1
MarqueVerderflex
190,97 €
Each
Unité
Peristaltic Electric 0.06L/min 10m 1 bar - - - R2550 +40°C ABS, PC 12 V dc 6W -
N° de stock RS 144-844
Référence fabricantBL 5/D
193,68 €
Each
Unité
Diaphragm Electric 5L/h - 101.5 psi - - IP65 BL5/D - Glass Fibre Reinforced PP 220 V, 240 V 200W -
N° de stock RS 705-9321
Référence fabricantRLFP122202D
MarqueXylem Flojet
106,66 €
Each
Unité
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
N° de stock RS 446-3506
Référence fabricant416990
MarqueXylem Flojet
428,60 €
Each
Unité
Diaphragm Electric 10.8L/min 28m 15 bar 1/2 in NPT 1/2 in NPT IP44 AD550 +60°C - 230 V 33W -
N° de stock RS 705-9333
Référence fabricantR3711132A
MarqueXylem Flojet
160,56 €
Each
Unité
Diaphragm Electric 5.5L/min 69m 6.9 bar 3/8 in BSP 3/8 in BSP - R371 +60°C Glass Fibre Reinforced Nylon 12 V dc 108W -
N° de stock RS 705-6678
Référence fabricantAU EV EZ
MarqueVerderflex
1.261,38 €
Each
Unité
Peristaltic Electric 0.6L/min 20m 1 bar - - IP40 EV-EZ +40°C Polyamide 100 → 120 V, 220 → 240 V 100VA -
N° de stock RS 705-6659
Référence fabricantAU ES3R16
MarqueVerderflex
134,52 €
Each
Unité
Peristaltic Electric - 20m 1 bar - - - ES3R1 +40°C Polyamide - 20W -
N° de stock RS 667-9104
Référence fabricantD3135H7011AR
MarqueXylem Flojet
304,51 €
Each
Unité
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 - -
N° de stock RS 705-6671
Référence fabricantAU R2550120 RS1
MarqueVerderflex
190,97 €
Each
Unité
Peristaltic Electric 0.24L/min 10m 1 bar - - - R2550 +40°C ABS, PC 12 V dc 6VA -
N° de stock RS 121-8587
Référence fabricantBT4B1604PVT2000U1110000
MarqueProMinent
1.132,19 €
Each
Unité
- Electric 3.6L/h - 16 bar 3/4 in G 3/4 in G IP65 BT4B +20°C PVDF 100 to 230 V 15.2 (Consumption)W PVDF
N° de stock RS 619-4432
Référence fabricant156993
MarqueBurkert
183,43 €
Each
Unité
Diaphragm Electric 5ml/min - 200 mbar - - IP40 7604 +60°C PEEK 24 V dc 1.5W FFKM, PEEK