Results 14 to 18 of 18
11-19-2011, 06:48 PM #14Professional Member*
- Join Date
- Dec 2005
11-19-2011, 07:10 PM #15
11-19-2011, 10:41 PM #16
The valve will operate normally with a lower pressure differencial. At 225 psig head and a 60 psig suction it will close off, pump down like normal to 30 psig, compressor shuts off on low pressure control, and the valve does not leak by. But At 275/60 psig it stays wide open with no power to the coil. Even pulled the coil off the stem to be sure. Stays wide open and the only way to shut off the compressor is the main breaker, or closing the king valve. Like spaceman said, it makes no sence.
11-21-2011, 02:48 PM #17
Piped in new sporlan LLSV, no problems, works as it should. The alco valve removed is shiney, clean, no appartent damage of any kind. I will go out of my way to buy Sporlan in the future.
11-25-2011, 12:29 AM #18
The MOPD has nothing to do with whether the valve will close or not.
Barring a mechanical or contaminated problem, solenoid valve failure to close is commonly caused by an oversized valve. Oversizing results in too little pressure differential across the valve port....the pressure on top of the disc must be a minimum 1/2 lb greater than the pressure below the disc or the valve will be in danger of not closing.
Solenoid valves should be selected based upon capacity, not line size.