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A · B · C · D · E · F · G · H · I · J · K · L · M · N · O · P · Q · R · S · T · U · V · W · X · Y · Z   entire Web this site reversing valve A component of a heat pump that reverses the refrigerant's direction of flow, allowing the heat pump to switch from cooling to heating or heating to cooling. The reversing valve is a heat pump's sole way of switching between heating and cooling modes. Although essential, reversing valves lower the efficiency of a heat pump for three main reasons: Heat transfer between the hot and cold gases flowing through the valve Pressure drops across the valve caused by bendsand sharp entrances and exits Refrigerant leakage from the high pressure sideto the low pressure side of the valve (throughclearance between the slider and seat) Related category    • HEATING Also on this site: Encyclopedia of Science Transport Concepts & Designs (partner site) BACK TO TOP