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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กำลังดูสินค้า 1 - 20 รายการจาก 139 รายการ / Viewing 1 - 20 of 139 products
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รายละเอียดสินค้า / Description ราคา / 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 Stock No. 702-6898
Brand :RS PRO
THB2,601.75
Each
Units
Diaphragm Electric 380ml/min - 11 psi - - IP50 D250 +100°C Aluminium 1.5 → 5 V 0.48W Anodized Aluminium, Nitrile, Silicone, Stainless Steel
RS Stock No. 702-6894
Brand :RS PRO
THB1,964.54
Each
Units
Diaphragm Electric 150ml/min - 1 bar - - IP50 D200 +100°C Nylon 1.5 → 4.5 V 0.48W Nitrile, Nylon, Silicone
RS Stock No. 705-9349
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.R3811142A
Brand :Xylem Flojet
THB6,911.18
Each
Units
Diaphragm Electric 5.5L/min 105m 10.5 bar 3/8 in NPT 3/8 in NPT - R381 +60°C Glass Fibre Reinforced Nylon 12 V 108W -
RS Stock No. 144-866
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BL 15/D
THB7,742.74
Each
Units
Diaphragm Electric 15.2L/h - 14.5 psi - - IP65 BL15/D - Glass Fibre Reinforced PP 220 V, 240 V 200W -
RS Stock No. 705-9343
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.R3811342A
Brand :Xylem Flojet
THB6,886.66
Each
Units
Diaphragm Electric 5.3L/min 105m 10.5 bar 3/8 in NPT 3/8 in NPT - R381 +60°C Glass Fibre Reinforced Nylon 24 V 108W -
RS Stock No. 763-2480
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.G70K202A
Brand :Xylem Flojet
THB12,890.22
Each
Units
Diaphragm Air 18.9L/min - 100 psi 6 mm Hose 9.5 mm to 15 mm Hose - G70K +49°C PP - - -
RS Stock No. 667-9113
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.G573215A
Brand :Xylem Flojet
THB10,814.56
Each
Units
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 Stock No. 619-4432
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.156993
Brand :Burkert
THB7,736.79
Each
Units
Diaphragm Electric 5ml/min - 200 mbar - - IP40 7604 +60°C PEEK 24 V dc 1.5W FFKM, PEEK
RS Stock No. 667-9116
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.G575215A
Brand :Xylem Flojet
THB7,621.10
Each
Units
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 Stock No. 144-844
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BL 5/D
THB7,542.68
Each
Units
Diaphragm Electric 5L/h - 101.5 psi - - IP65 BL5/D - Glass Fibre Reinforced PP 220 V, 240 V 200W -
RS Stock No. 144-850
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BL 10/D
THB6,220.30
Each
Units
Diaphragm Electric 10.8L/h - 43.5 psi - - IP65 BL10/D - Glass Fibre Reinforced PP 220 V, 240 V 200W -
RS Stock No. 126-0254
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.PA5120-F04
Brand :SMC
THB26,468.71
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 121-8586
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BT4B1601PVT2000U1110000
Brand :ProMinent
THB37,097.66
Each
Units
- 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 Stock No. 185-6110
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.162.1103
Brand :Verderflex
THB14,025.00
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 121-8603
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DF4A0W003060P0U120001210
Brand :ProMinent
THB43,006.00
Each
Units
Peristaltic Electric 6L/h - 2.5 bar - - IP65 DF4a +20°C - 100 to 240 V 24 (Consumption)W -
RS Stock No. 705-6675
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.AU R2550060 RS1
Brand :Verderflex
THB7,385.20
Each
Units
Peristaltic Electric 0.12L/min 10m 1 bar - - - R2550 +40°C ABS, PC 12 V dc 6VA -
RS Stock No. 185-6155
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.169.6021
Brand :Verderflex
THB3,080.06
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 705-9321
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RLFP122202D
Brand :Xylem Flojet
THB3,390.45
Each
Units
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 Stock No. 705-6684
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.AU R2550030 RS1
Brand :Verderflex
THB7,495.98
Each
Units
Peristaltic Electric 0.06L/min 10m 1 bar - - - R2550 +40°C ABS, PC 12 V dc 6W -
RS Stock No. 121-8602
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DF4A0W004015P0U120001210
Brand :ProMinent
THB44,702.60
Each
Units
Peristaltic Electric 1.5L/h - 4 bar - - IP65 DF4a +20°C - 100 to 240 V 24 (Consumption)W -
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