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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Part Details Brand Stock Pump Type Drive Type Maximum Flow Rate Maximum Head Maximum Working Pressure Maximum Suction Flow Input Connection Output Connection IP Rating Series Maximum Fluid Temperature Body Material Supply Voltage Input Power Wetted Materials Input Connection Size Input Thread Standard or Connection Type Output Connection Size Output Thread Standard or Connection Type
Verderflex Positive Displacement Pump, 375ml/min, 1 bar, 24 V dc
  • $ 105.67
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- - 375ml/min Please note that the Stock level on this page is periodically updated during the day.

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86mm Please note that the Stock level on this page is periodically updated during the day.

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1 bar Please note that the Stock level on this page is periodically updated during the day.

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24 V dc Please note that the Stock level on this page is periodically updated during the day.

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Verderflex Positive Displacement Pump, 375ml/min, 1 bar, 24 V dc
  • $ 169.03
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- - 375ml/min Please note that the Stock level on this page is periodically updated during the day.

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86mm Please note that the Stock level on this page is periodically updated during the day.

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1 bar Please note that the Stock level on this page is periodically updated during the day.

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24 V dc Please note that the Stock level on this page is periodically updated during the day.

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1.6 X 1.6 SI 2 ROLLER REPLACEMENT CARTRI
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1.6 X 1.6 VP 2 ROLLER REPLACEMENT CARTRI
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3.2 X 1.6 VP 2 ROLLER REPLACEMENT CARTRI
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4.0 X 1.6 SI 2 ROLLER REPLACEMENT CARTRI
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4.0 X 1.6 VP 2 ROLLER REPLACEMENT CARTRI
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4.8 X 1.6 SI 2 ROLLER REPLACEMENT CARTRI
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4.8 X 1.6 VP 2 ROLLER REPLACEMENT CARTRI
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Miniload 1channel 4Roller 12vDC 125rpm P
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Miniload 1channel 4Roller 12vDC 240rpm P
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Miniload 1channel 4Roller 12vDC 51rpm Pu
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Miniload 1channel 4Roller 230vAC 125rpm
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Miniload 1channel 4Roller 230vAC 51rpm P
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Miniload 1channel 4Roller 230vAC 82rpm P
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Miniload 1channel 4Roller 24vDC 125rpm P
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Miniload 1channel 4Roller 24vDC 51rpm Pu
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Miniload 1channel 4Roller 24vDC 82rpm Pu
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Miniload 1channel 4Roller 24vDC Brushles
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ProMinent Peristaltic Positive Displacement Pump, 30L/h, 5 bar, 100 → 230 V
  • $ 2,663.78
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45W Please note that the Stock level on this page is periodically updated during the day.

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