Self Priming Sewage Pumps

Self priming sewage pumps are the pumps that can automatically absorb and discharge water without filling it with water. It is particularly suitable for treating sewage containing solid particles, fibers or sludge.
Self priming sewage pumps are suitable for basement drainage, industrial wastewater treatment, farmland irrigation and drainage, emergency pumping and ship sewage discharge, etc., which require automatic suction and discharge of sewage containing impurities.

Main performance parameters
● Pump outlet diameter Dn: 25~300mm
● Capacity Q: 8~800m3/h
● Head H: 8~70m
● Ambient temperature < 50°C, medium temperature ≤ 80°C
● Medium density ≤1050Kg/m³
● PH：5~9
● The self-priming height of self priming sewage pumps cannot exceed the specified value, and the total length of the suction pipe should be < 10 meters. (Water temperature 20℃, standard atmospheric pressure)
● Through capacity: the diameter of suspended particles is 60% of the pump diameter, and the fiber length is 5 times the pump diameter.
● When the medium temperature is high, the self-priming height and the length of the suction pipe need to be reduced.
● Users can also request design performance parameters.

Features
1.Strong self-priming ability: self priming sewage pump can automatically absorb water after the first filling (suction distance 4~6 meters), no bottom valve is required, suitable for intermittent operation.
2.Good flowability: the wide flow channel design can handle solid particles (such as sand, fiber), sludge and even small stones (depending on the model).
3.Corrosion and wear resistance: cast iron, stainless steel or engineering plastic materials can be selected to adapt to complex media such as sewage and corrosive liquids.
4.Automatic start and stop: some models are equipped with float switches to achieve unattended drainage.

Description Of Pump Type
For example：50ZW15-30 P B
50: The diameter of the inlet (mm)
ZW: Self Priming Sewage Pumps
15: Rated flow rate(m³/h)
30: Rated head(m)
P: Stainless steel material (if no mark is used, it is a cast iron pump)
B: Explosion-proof motor (if no mark is used, it is a normal motor)
Structure drawing

Summarize
The self priming sewage pumps have self-priming capacity of 4-6 meters, without the need for a bottom valve, and can automatically operate upon the first water injection. Adopting an anti blocking wide channel design, it can treat wastewater containing solid particles and fibers, and provide corrosion-resistant materials such as cast iron and stainless steel for selection. Easy to install and maintain, supports automatic control, suitable for intermittent sewage discharge scenarios in municipal, industrial, agricultural, etc., especially suitable for complex medium treatment needs.