Hello gentlemen, I have onboard alfa laval pu150 lub oil separator, and following problem with it. After start from standstill the separator is running without any problem, is not leaking, keeps the pressure, but after first discharge it starts to loosing oil into the sludge but discharge process looks like this:
-change over valve changes the position to recirculation
-displacement and bowl closing water are delivered
-discharge, purifier shoots immediately without any problem or abnormal noise
-displacement and bowl closing water are delivered but I can hear that the bowl is not closing
-change over valve changes the position to feed but pressure (PT4) is not increasing
-after a few seconds change over valve goes back to recirculation and purifier is filling with displacement water for a few seconds
-change over valve goes to feed position and purifier starts to deliver but it´s leaking the oil into the sludge
I´ve checked and change all oring and sealing rings, checked pairing disc height, checked belt and clutch, water, air block also checked, water tank clean, and its still losing oil.
Have you ever experienced simmilar situation or have any experience with that type of purifier?
I am looking forward to hearing from you.