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.

...
Lees meer Lees minder

Filters

1 - 20 van 145 producten worden weergegeven
Resultaten per pagina
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. 702-6894
FabrikantRS PRO
54,69 €
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. 702-6898
FabrikantRS PRO
72,44 €
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. 667-9097
FabrikantnummerR4300242A
FabrikantXylem Flojet
339,83 €
Each
Aantal stuks
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-stocknr. 705-9355
FabrikantnummerR3521139A
FabrikantXylem Flojet
223,80 €
Each
Aantal stuks
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 -
RS-stocknr. 705-9383
Fabrikantnummer53041-2003-230
FabrikantXylem Jabsco
800,91 €
Each
Aantal stuks
Impeller Electric 35L/min 16m - 1 in BSP 1 in BSP IP54 - - Bronze 230 V 300W -
RS-stocknr. 705-9393
Fabrikantnummer53081-2003-230
FabrikantXylem Jabsco
926,04 €
Each
Aantal stuks
Centrifugal Electric 80L/min 20m - 1-1/2 in BSP 1-1/2 in BSP IP55 - - Bronze 230 V ac 550W -
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. 705-9327
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. 493-1920
Fabrikantnummer7043 RS
212,68 €
Each
Aantal stuks
Drum Electric 40L/min 12m - - 3/4 in Plain - - - - 12 V dc - -
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. 144-844
FabrikantnummerBL 5/D
187,08 €
Each
Aantal stuks
Diaphragm Electric 5L/h - 101.5 psi - - IP65 BL5/D - Glass Fibre Reinforced PP 220 V, 240 V 200W -
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. 446-3506
Fabrikantnummer416990
FabrikantXylem Flojet
404,20 €
Each
Aantal stuks
Diaphragm Electric 10.8L/min 28m 15 bar 1/2 in NPT 1/2 in NPT IP44 AD550 +60°C - 230 V 33W -
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. 121-8587
FabrikantnummerBT4B1604PVT2000U1110000
FabrikantProMinent
1.088,33 €
Each
Aantal stuks
- 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
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. 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. 705-6656
FabrikantnummerAU EZ3R16
FabrikantVerderflex
130,60 €
Each
Aantal stuks
Peristaltic Electric - 20m 1 bar - - - EZ3R1 +40°C Polyamide - 20W -
RS-stocknr. 705-6678
FabrikantnummerAU EV EZ
FabrikantVerderflex
1.224,64 €
Each
Aantal stuks
Peristaltic Electric 0.6L/min 20m 1 bar - - IP40 EV-EZ +40°C Polyamide 100 → 120 V, 220 → 240 V 100VA -
Related Products
The ProMinent Gamma/X series solenoid diaphragm dosing pump ...
Description:
The ProMinent Gamma/X series solenoid diaphragm dosing pump has a maximum flow rate of 24L/ hour and 4bar working pressure. It is suitable for all your liquid media metering needs. Integrated solenoid control protects from overloading and constantly measures backpressure. ...
The Verderflex peristaltic, electric operated, self-priming, positive displacement ...
Description:
The Verderflex peristaltic, electric operated, self-priming, positive displacement pump has a maximum flow rate of 2200ml/minute. It is a versatile and highly capable solution for your fluid transfer and dosing needs. The simplistic design ensures reliability and minimal maintenance costs. ...
The R3DC peristaltic pump is a versatile and ...
Description:
The R3DC peristaltic pump is a versatile and highly capable solution for your fluid transfer and dosing needs. Their simplistic design ensures reliability and minimal maintenance costs with damaged tube or tube elements easy to change within seconds, minimising downtime ...
The Xylem Flojet AD550 multi-chamber diaphragm positive displacement ...
Description:
The Xylem Flojet AD550 multi-chamber diaphragm positive displacement pump is designed for transfer, demand/delivery, filtration, high flow booster, carbonation, beverage dispense and continuous reverse osmosis applications. Its maximum flow rate is 10.8L/min. It has new multi-chamber technology with patented valve ...