spring loaded hand valve problem

[msimeou]

Hi everyone.We install sping loaded hand valves on a remote Manitowoc ice machine so that we could isolate the condenser from the machine in case of trouble.After two week from installing them the ***** gouldnt pass throu the hand valve causing the high pressure switch to open.I had to remove them to make the ice machine work properly.Any idea why this happen?The supplier state that this wasnt sopposed to happen !

[Brian_UK]

Were the valves designed for the refrigerant being used?

Inner seals failed?

Valve installed backwards, pressure made valve close ?

What make of valve is it?

[msimeou]

Thanks Brian for replying.The valves installed correctly,chinise make,about the inner seals im not sure,dont seem do have any damage there.Anyway i want use again this kind of valve.i prefer a/c type,there more reliable.Thanks again for replying