MDMV means Dead Man's Valve. It is used for very fast oil or water drain. MDMV is specially designed to drain oil and water from closed loop refrigerant systems under pressure. The valve is self-closing on release of the handle, which provides protection to operator against refrigerant leaks which can release gas inadvertently into the atmosphere. To avoid hydraulic pressure build-up between the stop valve and the MDMV an essential relief component is included as part of the cone assembly, which will open at 25 bar (363 psi). MDMV is designed to conform to all the safety rules and regulations specified by national and international standards for industrial refrigeration.