Q: What is the suction head of a centrifugal pump?
A: The height difference from the water absorption surface of the centrifugal pump to the center line of the pump shaft, plus the resistance loss of the water pump side valve and the pipeline of the centrifugal pump is the suction head of the centrifugal pump.
In the actual work of the pump, some are negative pressure water absorption (such as water pump than water absorption surface); some are positive pressure water (such as the pump top is lower than the water absorption surface, or the pump is taking water from the pressure pipe), positive pressure water The "sucking head" is a negative value.
Q: What is the relationship between the suction head of the centrifugal pump and the reading value of the vacuum gauge?
A: The suction head of a centrifugal pump is often expressed in terms of how many meters; and the reading of a vacuum gauge is often expressed in terms of how many millimeters of mercury or how many "pa". The pressure of 1 mm Hg is approximately equal to the pressure of 13.59 mm water column = 13.32 Pa. For example, the vacuum gauge on the water suction side of the pump is 150mmHg, and the actual suction stroke of the pump is 2.039m, and the negative pressure is about 2OkPa.
Q: What is the total water head of the centrifugal pump?
Answer: The height difference from the shaft centerline of the horizontal centrifugal water pump to the highest point of the outlet pipe, plus the resistance head loss of the outlet valve and the outlet pipe, plus the sum of the surplus heads at the highest point of the outlet pipe is the centrifugal pump. The total water head.
Q: What is the relationship between the discharge head of the centrifugal pump and the reading value of the outlet pressure gauge?
A: The discharge head of the centrifugal pump is also measured in meters; at present, some people are used to "kilograms". The legal unit of the pressure gauge is Pascal. The conversion ratio we currently use is "1 kg" which is equal to about 0.1 MPa. For example, if the pressure gauge indicates 58 MPa, then the lift of the pump is approximately equal to “5.8 kg” and the outlet of the pump is 58 meters. If it is precise, 0.1 MPa = 1.02 "kilograms".
Q: What do the letters "MPa" and "Pa" on the pressure gauge mean?
A: The letter on the pressure gauge: "MPa" means "megapa". +M stands for “Million”, which is “Mega”; “Pa', here stands for “Pascal”.
