NITRA push-to-connect inline quick exhaust valves increase cylinder speed by venting exhaust air to atmosphere (the exhaust air does not have to travel back through the tubing and the valve). Normal flow is from inlet to outlet ports, while reversing flow from outlet is vented immediately to an exhaust port.
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Would you buy this item again? Undecided
Its a very nicely built Inline quick exhaust, However I intended to use it so I can speed up my actuator which unfortunately did not work out well. It might do well if your lines are extra ordinarily long and air volume is not too high. Beside that it is quite and well built