Good day sir.I got the problem with my PUMP. I don't know the name of manufacture or model code of  the pump. But I am sure  this is the piston axis  pump, diameter of piston maybe 25 mm.the number of piston are 9. The inlet port is larger than outlet port. The rotation of pump is clockwise.The swash plate is control by mean of hydarulic, but I don't know how exact it does. And the situation is:     At first, the pump done well     After, when the pressure is about 50 bar, oil has gone to tank by drain line.not go in the outlet line of the pump. So the pressure gradual decrease.Please help me to tell the name of Sweage pumps &Sludge pumps, code of the pump.And what problem with my pump. Thanks you very much.
I'm not sure exactly you are trying to say but sounds like you have a piston pump with some issue.  Sounds like the rings in your pistons have gone bad and are losing compression.  Since you don't know the pump manufacturer, a good bet may be to contact Flowserve.  They have taken over many pump companies over the years and that may be one that they cover or they may be able to tell you who made it.

2011-08-08

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