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庫存編號 705-6687
製造零件編號AU R2550015 RS1
BrandVerderflex
HK$1,776.19
單位
Peristaltic Electric 0.03L/min 10m 1 bar - - - R2550 +40°C ABS, PC 12 V dc 6VA -
RS庫存編號 705-6671
製造零件編號AU R2550120 RS1
BrandVerderflex
HK$1,681.51
單位
Peristaltic Electric 0.24L/min 10m 1 bar - - - R2550 +40°C ABS, PC 12 V dc 6VA -
RS庫存編號 705-6659
製造零件編號AU ES3R16
BrandVerderflex
HK$1,008.00
單位
Peristaltic Electric - 20m 1 bar - - - ES3R1 +40°C Polyamide - 20W -
RS庫存編號 705-6656
製造零件編號AU EZ3R16
BrandVerderflex
HK$1,008.00
單位
Peristaltic Electric - 20m 1 bar - - - EZ3R1 +40°C Polyamide - 20W -
RS庫存編號 702-6894
BrandRS PRO
HK$397.90
單位
Diaphragm Electric 150ml/min - 1 bar - - IP50 D200 +100°C Nylon 1.5 → 4.5 V 0.48W Nitrile, Nylon, Silicone
RS庫存編號 705-9321
製造零件編號RLFP122202D
HK$721.11
單位
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庫存編號 705-6675
製造零件編號AU R2550060 RS1
BrandVerderflex
HK$1,539.81
單位
Peristaltic Electric 0.12L/min 10m 1 bar - - - R2550 +40°C ABS, PC 12 V dc 6VA -
RS庫存編號 667-9194
製造零件編號TEP50PTWD
BrandTecnomatic
HK$7,603.51
單位
Diaphragm Air 53L/min 70m - 1/2 in G 1/2 in G - TE53-PTW - PP - - -
RS庫存編號 121-8598
製造零件編號DF2A0208P00A10W1
BrandProMinent
HK$2,933.61
單位
Peristaltic Electric 0.8L/h - 1.5 bar - - IP65 DF2a +20°C - 230 V 5 (Consumption)W -
RS庫存編號 702-6898
BrandRS PRO
HK$526.95
單位
Diaphragm Electric 380ml/min - 11 psi - - IP50 D250 +100°C Aluminium 1.5 → 5 V 0.48W Anodized Aluminium, Nitrile, Silicone, Stainless Steel
RS庫存編號 705-9333
製造零件編號R3711132A
HK$1,246.82
單位
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 -
RS庫存編號 705-6678
製造零件編號AU EV EZ
BrandVerderflex
HK$10,402.15
單位
Peristaltic Electric 0.6L/min 20m 1 bar - - IP40 EV-EZ +40°C Polyamide 100 → 120 V, 220 → 240 V 100VA -
RS庫存編號 667-9182
製造零件編號TEP130-PX
BrandTecnomatic
HK$8,880.00
單位
Diaphragm Air 132L/min 80m - 1 in Push Fit 1 in Push Fit - TEP132 - PP - - -
RS庫存編號 446-3483
製造零件編號416989
HK$2,697.92
單位
Diaphragm Electric 3L/min 89m 20 bar - - IP44 AD4/90 +77°C - 230 V 55W -
RS庫存編號 705-9327
製造零件編號RLF222201D
HK$936.50
單位
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庫存編號 144-844
製造零件編號BL 5/D
HK$1,460.00
單位
Diaphragm Electric 5L/h - 101.5 psi - - IP65 BL5/D - Glass Fibre Reinforced PP 220 V, 240 V 200W -
RS庫存編號 705-6665
製造零件編號AU EZ3R16 060 02
BrandVerderflex
HK$2,699.29
單位
Peristaltic Electric 0.225L/min 20m 1 bar - - - EZ3R1 +40°C Polyamide 12 V dc 17W -
RS庫存編號 667-9097
製造零件編號R4300242A
HK$2,604.40
單位
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庫存編號 619-4432
製造零件編號156993
BrandBurkert
HK$1,646.45
單位
Diaphragm Electric 5ml/min - 200 mbar - - IP40 7604 +60°C PEEK 24 V dc 1.5W FFKM, PEEK
RS庫存編號 705-6684
製造零件編號AU R2550030 RS1
BrandVerderflex
HK$1,681.51
單位
Peristaltic Electric 0.06L/min 10m 1 bar - - - R2550 +40°C ABS, PC 12 V dc 6W -