Quick Release Couplings can be extremely useful for applications where you are frequently connecting and disconnecting hoses; however they can also present some serious problems.
I have experienced occasion ions where the coupling has become worn or damaged (often by being thrown about on the floor) and will either only partially open or in the worst case will not open at all.
These couplings rely on a mechanical valve being forced open when pushed together. By their nature they often have a high pressure drop and also are an ideal source for dirt and contaminant to enter the system.
There have even been occasions on some systems when they become hydraulically locked and will not open.
I have nothing personal against quick release couplings, all I say is use them only where absolutely necessary, protect them from damage and keep them scrupulously clean.
Very best
Bob
www.hydraulicbrain.com
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