The four factors of sewage pump without water

Cause a, the residual air pressure pipe and pump body: some users in sewage pump before the start of filling and not met enough water; Sometimes look of irrigation water from vent overflow, turn the pump shaft to hand in the air but not fully discharge, causing a little air also remain in inlet pipe and pump body.

Contact with sewage pump inlet pipe under horizontal flow direction of the application of more than 0.5% of the down slope, connect one end of the water pump imported as the highest, don't completely level. If up, cock would survive the air inlet tube, to reduce the vacuum in the pipes and pumps, water absorption.

Pump packing for long-term use have wear or too loose, causing a lot of water spewing from the clearance between the pump shaft sleeve and packing, as a result, the external air from entry to the interior of the pump, the clearance affects the water.

Inlet pipe because of long-term potential, underwater pipe wall corrosion holes, water pump the water falling after work, when the hole above the water, the air from the hole in the feed line.

Inlet pipe bend fractures, the junction between inlet pipe and the water pump in small clearance, are likely to make the air into the intake pipes.

Reason two, sewage pump speed is low

A fair number of users because of the original motor damage, casually and deserve to go up another electric motor drive, the result is that can't flow, head low, and even less water.

There are many big water pump with belt transmission, due to long-term use, belt wear and loose, also appear skid phenomenon, which reduces the water pump speed.

Two belt wheel center distance is too small or axis is not parallel, belt tension side mounted to the above, the Angle is too small, the two pulley diameter calculation errors and coupling transmission pump shaft eccentricity larger, etc., will result in changes of the water pump rotate speed.

Impeller and the pump shaft fastening nut loose or pump shaft bending deformation, move more, cause impeller directly with the pump body friction, or bearing damage, are likely to reduce the speed of the pump.

Motor winding burned, loss, and maintenance of winding turns, wire diameter, the change of the wiring method, or maintenance of the fault is not completely ruled out factors also can make water pump speed change.

Three reasons, ignore the allowable suction