Disc Type Steam Trap

The working principle of the disc type drain valve is mainly based on the thermodynamic characteristics. When supercooled condensate flows in, the pressure difference between the upper and lower parts of the disc-shaped valve plate pushes open the valve plate, and the water is discharged through the annular groove. If the condensed water contains steam, the steam flows from the inlet hole to the outlet through groove B under the valve plate. When passing through the narrow channel between the valve plate and the valve seat, the pressure drops and the steam specific volume increases sharply, resulting in a decrease in static pressure under the valve plate. Steam is blocked at the B slot and outlet hole, and is forced to rush into the control chamber above the valve plate through the gap between the valve plate and the valve cover. Dynamic pressure is converted into static pressure, forming a higher pressure in the control chamber than below the valve plate, quickly closing the valve plate downwards and blocking steam. After the valve plate is closed for a period of time, the steam in the control room condenses and the pressure drops, which will cause the valve plate to open instantly, resulting in periodic steam leakage.