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The final step in our pressure regulator calibration process is to verify that our shut off/regulating valve does not leak. To accomplish this task, we use a container of water and insert the swivel stem of the pressure regulator in the water. The regulator knob is turned on and a flow of air bubbles is seen in the water. The knob is then turned off while still keeping the stem in the water and we observe that the air bubbles stop completely. We do not allow a single air bubble to flow into the water after the initial flow stops. We have done this test since 1978 on all our products and have a proven field history to verify that we are doing this Quality Test correctly.

Best shut off/regulating valve in the industry.

We have an excellent shut off/regulating valve because we have designed our own soft, Buna-N valve seat and do not have tire valves which are prone to leak. All our competitors use low cost tire valves which have a low spring force for shutting off the valve. (Have you ever had your tire valves in your automobile leak?) Our shut off/regulating valve has a significantly higher spring compression rate to force the valve close.

You can have the best valve design but if you don't keep dirt away from the sealing surface, the valve will leak over a period of time. To correct for this we do a special cleaning process to eliminate dirt created by the screw machine manufacturing process. In addition we have special stainless steel filters to keep dirt from the rusty propane/MAPP® cylinders away from the valve sealing surface.