Lihua self-priming pump sewage treatment - Sewage sludge pump priming pump sewage pump

Lihua self-priming sewage pump (water pump / sludge pump / suction sewage pump) operation, due to the high-speed rotation of the impeller, causing a vacuum at its inlet, the water in the suction tank atmospheres absolute pressure at the inlet of the impeller under the effect of poor water flows into the inlet end of the suction pipe from the impeller. CAUSE self-priming sewage pump cavitation is the partial pressure of the pump is lower than the saturation vapor pressure of the water, or vaporization is a prerequisite for the formation of cavitation. Self-priming sewage pump cavitation reasons generally have the following aspects: height too high self-priming sewage pump priming pump installation part. With the self-priming pump installation height increases, the vacuum pump inlet is increased so the pump pressure drop too low. Self-priming sewage pump priming pump operating conditions deviate from the actual design point farther. When the pump is running at off-design conditions, it may also have a bottom strip at the bottom of the vortex impeller. When the vortex center pressure drops when the saturated vapor pressure, the vortex becomes cavitation zone. When this vortex extends into the pump, not only to promote and increase the pump cavitation some parts, but also caused a strong vibration of the unit, and issued roar. Self-priming sewage pump priming pump inlet condition is not good due. Adopting elbow inlet channel pump, due to the uneven distribution of pressure velocity curve, causing the pump impeller inlet velocity distribution is not uniform, swirl into the pool of water will enter the pre-swirl or pump air into the same cause impeller inlet flow rate, pressure uneven, causing steam cave and the occurrence of cavitation. According to foreign cavitation test data indicate that the water-containing gas increases, the cavitation begin sooner. Since high-priming sewage pump installation site altitude, the water temperature is higher self-priming pump delivery. At high altitudes, the atmospheric pressure is low, it will pump suction pressure is correspondingly lower; and the higher temperature, saturated vapor pressure will be greater, the easier water vaporization. Shows the atmospheric pressure at different altitudes when head. ////////////////////////////////////////////////// ////////// Lihua rotor pump network www.lihuabengye.com Tel: 0575-83539901 Fax: 0575-83524822