what are the draw backs of a water regulating valve installed in the outlet of a shell and tube condenser? I have a danfoss WVFX valve on the outlet of this type condenser and the system(12hp) has been working on cooling tower water but now it is tripping on on high head pressure. I can switch to town water and it runs great. I have two water cooled units side by side and they both have the same problem which seems to indicate a problem with the tower(which is cooling various peices of equipment, of which we service neither these nor the tower just the chillers) or a flow problem in the piping?
the town water is 67*F and 60 psi ...........outlet temp 80*F
cooling tower water is 74*F and 40 psi..............outlet temp 120*F
I opened wide the regulating valves for both systems and switched to cooling tower water and it was maintaing at 90*F outlet yesterday , today is cooler and they are 80*F, naturally cooler ambient + lower wet bulb = cooler tower water.