QDV is a quick closing oil drain valve, designed particularly for draining oil from systems containing refrigerant (ammonia) under pressure. The valve will close immediately on release of the handle, thus protecting user and environment against unnecessary refrigerant leaks. In order to prevent hydraulic pressure
building up between the stop valve and the QDV an integral relief device is included as part of the cone arrangement, which will open at approx. 5 bar g (363 psig). QDV is designed to meet the safety demands specified by national
and international authorities within industrial refrigeration.