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NRV is Non Return Valve which is prevents to liquid flood back to the suction line over the impeller or other else.

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Q: Why NRV directly after pump disch?
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If you double the speed of centrifugal pump?

Centrifugal pumps generally obey what are known as the pump laws. These laws state that the flow rate or capacity is directly proportional to the pump speed; the discharge head is directly proportional to the square of the pump speed; and the power required by the pump motor is directly proportional to the cube of the pump speed.


How do you control the control oil line vibrations in steam turbine?

If,clamp is not proper fitted in control oil line that time it may happen cause in control oil line pressure also more than main oil pump disch.


Why the centrifugal pump is called high discharge pump?

for a simple reason because it has high discharge than any other available pump. the centrifugal pump uses the centrifugal force to push out the fluid centrifugal force = (mass *velocity2)/radius. hence centrifugal force is directly proportional to the square of the velocity, in this case being the velocity of the fluid. power provided to pump proportional to the force exerted by the impeller.hence higher the power results in higher centrifugal force implying square of the velocity of the fluid. higher the velocity of the fluid higher the discharge of the pump.


Why reciprocating pumps are not coupled with motor?

In case of emergency, if the cylinder stops, the motor does not. So it can be harmful for motor. Designers couple the high power motor to the cylinder of pump by means of a clutch. so the motor can continue to rotate while the cylinder stops. Also in case of closing the outlet valve of a pump, the pressure in the cylinder can fail the cylinder or crankshaft and accessories. in this case the clutch can separate the power from motor to the pump and prevent failure of pump.


Types of positive displacement pump?

gear pump, crescent gear pump, axial-piston pump, radial-piston pump, linear-piston pump, & vane pump Also, fuel injection pumps such as linear piston pumps and rotary piston pumps.

Related questions

What is the birth name of Erik Disch?

Erik Disch's birth name is Erik Michael Disch.


When was Rolf Disch born?

Rolf Disch was born in 1944.


What has the author T Disch written?

T. Disch has written: 'Burn this'


In boiler feed water line whether a non return valve should precede or succeed the delivery valve of feed water pump?

In boiler feed water line the NRV is normally installed between Pump and stop valve if the line is short and an another NRV is installed at boiler entrance and after stop valve if the line is long or pump is 10 to 15 m away from the boiler.


When did George Disch die?

George Disch died on 1950-08-25.


When was George Disch born?

George Disch was born on 1879-03-15.


When did Thomas M. Disch die?

Thomas M. Disch died on 2008-07-04.


When was Thomas M. Disch born?

Thomas M. Disch was born on 1940-02-02.


When was Rolf Disch Solar Architecture created?

Rolf Disch Solar Architecture was created in 1969.


When and where was baseball player George Disch born?

George Disch was born March 15, 1879, in Lincoln, MO, USA.


What are baseball player George Disch's physical stats?

George Disch is 5 feet 11 inches tall. He throws right.


When and where did baseball player George Disch die?

George Disch died August 25, 1950, in Rapid City, SD, USA.