Structure:
Self-priming pump consists of diesel engine and water pump which is driven by a same driving axle. The pump is fixed on a frame through-shock absorber device, so it is compact in structure and convenience for use of movement.
The pump consists of pump body, pump cover, flow guidance, impeller and seal part etc. The pump body and pump cover are made from high quality die-casting of aluminum alloy. The flow guidance and impeller are made from high strength cast iron, shaft sealing is machinery type sealing. The suction and discharge pipe connector are made from engineering plastic so it can be connected with rubber pipe.
The inlet of pump is higher than the inlet of impeller so that it can start which only need fill water into the body of the pump. The inlet of pump if fixed with a one-way calve to prevent liquid from being drained into water pool from the pump body which action by siphon after stop the machine it must guarantee store enough liquid in the pump body for next start.
The rotary direction is anticlockwise as viewed from inlet direction of impeller.
Main point of use
- The coupling of suction pipe to the pump must be tight, reliable and no leakage.
- A filter net must be added into the inlet of suction pipe as a protection, so as to avoid impurity be sucked into the pump and stick or damage the impeller.
- Prime the pump until the water overflow.
- Do not run it at high speed unless you prime it
- Drain off the pump for storage
Procedure of use
- Adding water
When start the pump for the first time, it only need to add a few water into the pump and self priming after start, so not necessary bottom valve.
- start the engine
Use and maintenance
- According to normal stipulation, the vacuum of pump by suction is expressed with allowable net positive suction head. When the pump work at the area of lower than 250m altitude. It can estimate suction head of pump which 10m minus allowable net positive suction head is it. Follow increasing with altitude, the atmosphere should be decreased , to the suction head of pump also be decreased. The value of decrease can be estimated which 10m minus local atmosphere value is it.
- Pipeline is better with short pipe and straight pipe and straight pipe, so it can decrease unnecessary loss of pipeline. The pipeline must be supported to avoid from vibrating and damaging the pump by oppressive. Before operation it must check connection part between pump and pipeline whether there is loose phenomenon and special pay attention to leakage of inlet pipeline.
- The filter net must keep a certain distance between river surface, river bottom and river bank , the net must dip into water not less than 0.3m to avoid suction air and to keep a distance which is not less than 0.2m from river bottom, river bank to avoid suction stone or weeds.
- If the gap between impeller and the surface of flow guidance is over 1mm, so that it can be continuous to be used after adding an adjustment shim on the shaft shoulder.
- When change machinery seal, be sure to apply adhesive to the connection between steel part #7 and pump cover. When fixed it, do not hit by force to prevent wear slice fracture.
- When the pump is used in winter, to screw off the drain cock under the p ump and draw off water thoroughly after stop the machine to prevent from being broken by ice of freeze
Technical date: |
