Prevention of self-priming centrifugal pump intake of eight measures

2019 - 12 - 27

self-priming centrifugal pump inlet prevention measures: 1, the installation position of self-priming centrifugal pump should be close to the surface as far as possible, ensure not breathe in the air when the water level is falling. 2, installing a suction pipe, water horizontal tube should have water direction slightly tilted downward or horizontal installation, any point shall not be higher than the pump inlet, pressure pipe or tube air out. 3, to prevent the stuffing box leak. Stuffing box of elastic should be appropriate, if too loose, should be to tighten the packing gland; Packing damage or failure, should be replaced in a timely manner; Packing covers the dip pipe plugging and fever, will cause the packing cover a flat, should be cleaning water pipe. 4, with inlet pipe before installation of flange connection, will be two flange contact plane is clean, with a 3 ~ 5 mm thick rubber gasket, symmetry, points several times to gradually tighten bolts. 5, self-priming pump submerged depth of the bottom valve will have enough, from the date the valve surface submerged depth should be equal to 1 of bottom valve diameter. 5 ~ 2 times, at least not less than 0. 5m。 If submerged too shallow, easy to form vortex, thus take in air and produce cavitation and damage to the impeller and the pump shell. If it is found that the pump runs into the water table has dropped down soon, you can put a few boards on the surface of the water, to reduce the vortex, prevent the air into the pump housing. 6, self-priming centrifugal water pump has deflated plug on pump body, to facilitate deflated, available instead of deflated screw thread sizes the same faucet, deflated when turn on the tap. 7, self-priming pump, water inlet of the vacuum degree is limited, the vacuum degree is too large, easy to make the pump in the inland waters boil, adverse to the self-priming pump work. So, the suction pump has its respective big allowed, suction is in 3 ~ 8. Between 5 m, when installation should be controlled in the range. 8, pay attention to the exhaust. Before start self-priming pump should add sufficient water diversion, to eliminate air in the self-priming pump; At ordinary times should be regularly open the vent screw on the pump cover, eliminate accumulation in the air inside.

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