DN15-150

PN10-42

Overview

Power plant boiler or industrial boiler is definitely installed with vacuum exhaust steam valve, which is used to exhaust steam and adjust boiler steam temperature within specified range in time of boiler startup. During normal operation, when the pressure and temperature of boiler increase and boiler safety door is not required to be actuated, vacuum exhaust steam valve can be used to reduce pressure and temperature Thus it can be seen that the operating condition of vacuum exhaust steam valve is quite bad. Mixture of gas and water is usually exhausted in time of startup while what is exhausted is high temperature and pressure over heat steam under full pressure state in the operating state. lf all-purpose stop valve is adopted and used frequently under bad condition of large temperature and pressure difference, valve seat and valve core will produce crack or cavitation leakage, greatly shortening the service lifetime of valve. According to the above instances, Shanghai Power Plant Valve Co.,LTD Factory has specially designed and developed DJ961HY type vacuum exhaust steam valve, which is a new king of valve and can endure the high temperature no more than 540℃ and pressure difference no more than 32MPa.lt is applied to the occasions like over heat steam.

Features

DJ961HY type to the air discharge valve structure is characterized by the use of medium countercurrent (high into the low), with cut-off and check the dual function, the valve cover and the valve body is self-sealing structure, closed when the pressure to 100% sealed, Into the size of the double spool, to solve the problem of large pressure and difficult to open. Seat and spool welding special alloy wear resistance and toughness, the use of taper seal, linear sealing surface, in the temperature difference conditions, will not be deformed, easy to crack.

Working Principle

DJ961HY type to the air exhaust valve by the electric device and the air exhaust valve body composed of two parts. By the electric head to produce axial force, driven stem action, so that the valve is fully open or completely closed (can not be used for adjustment), to complete the system operation requirements. The electric device can be configured according to the requirements of the user system or the specified manufacturer.