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 81 รายการ / Viewing 1 - 20 of 81 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
THB2,239.89
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
THB1,727.33
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
THB5,886.08
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
THB6,554.77
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
THB6,988.89
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
THB11,991.15
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. 619-4432
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.156993
Brand :Burkert
THB6,893.92
Each
Units
Diaphragm Electric 5ml/min - 200 mbar - - IP40 7604 +60°C PEEK 24 V dc 1.5W FFKM, PEEK
RS Stock No. 667-9113
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.G573215A
Brand :Xylem Flojet
THB9,393.53
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. 144-850
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BL 10/D
THB6,526.85
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. 144-844
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BL 5/D
THB5,990.96
Each
Units
Diaphragm Electric 5L/h - 101.5 psi - - IP65 BL5/D - Glass Fibre Reinforced PP 220 V, 240 V 200W -
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. 121-8595
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DLTA1612PVT2000U11131EN0
Brand :ProMinent
THB97,167.88
Each
Units
- Electric 11.3L/h - 16 bar 3/4 in G 3/4 in G IP65 DLTa +20°C PVDF 100 to 230 V 78 (Consumption)W PVDF
RS Stock No. 180-9203
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.S1CBH07065PVTS070UA110S0EN
Brand :ProMinent
THB125,332.47
Each
Units
Diaphragm Electric 65L/h - 7 bar - - - S1Cb +100 °C @ 15 min (2 bar) PVDF 100 → 230 V ac - PVDF
RS Stock No. 667-9194
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TEP50PTWD
Brand :Tecnomatic
THB28,322.64
Each
Units
Diaphragm Air 53L/min 70m - 1/2 in G 1/2 in G - TE53-PTW - PP - - -
RS Stock No. 121-8596
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DLTA1020PVT2000U11131EN0
Brand :ProMinent
THB97,167.88
Each
Units
- Electric 19.1L/h - 10 bar 3/4 in G 3/4 in G IP65 DLTa +20°C PVDF 100 to 230 V 78 (Consumption)W PVDF
RS Stock No. 179-7498
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.PNDB0220PVT2000001
Brand :ProMinent
THB28,407.23
Each
Units
- Air 16.7L/h - 2 bar - - - - - PVDF - - -
RS Stock No. 121-8600
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DF2A0224P00A10W1
Brand :ProMinent
THB15,235.50
Each
Units
Peristaltic Electric 2.4L/h - 1.5 bar - - IP65 DF2a +20°C - 230 V 5 (Consumption)W -
RS Stock No. 667-9182
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TEP130-PX
Brand :Tecnomatic
THB32,443.98
Each
Units
Diaphragm Air 132L/min 80m - 1 in Push Fit 1 in Push Fit - TEP132 - PP - - -
RS Stock No. 180-9204
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.S1CBH04120PVTS070UA110S0EN
Brand :ProMinent
THB130,306.25
Each
Units
Diaphragm Electric 120L/h - 4 bar - 1 in G - S1Cb +100 °C @ 15 min (2 bar) PVDF 100 → 230 V ac - PVDF
RS Stock No. 121-8589
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BT4B0413PVT2000U1110000
Brand :ProMinent
THB39,767.37
Each
Units
- Electric 12.3L/h - 4 bar 3/4 in G 3/4 in G IP65 BT4B +20°C PVDF 100 to 230 V 15.2 (Consumption)W PVDF
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