Description:
A49Y-Pw542.55V DN200
用途Usage
主要用于电站锅炉、压力容器、减温减压装置等设备，防止压力超过允许zui高压力值，保证设备安全运行。
This valve is used for power plant boilers, pressure containers, pressure and temperature reducing devices and other facilities. It serves
to prevent the pressure from exceeding max. allowable value and ensure the safety of the device during working.
结构简述 Struture briefing
1.该阀门为单排汽、两端为法兰连接结构。主要由阀体、阀盖、活塞室、阀瓣、阀杆等组件。
2.阀座、阀瓣密封面均由铁基铬镍不锈钢焊条堆焊而成，提高了耐磨性和抗冲蚀性。
1.The structure of the valve is of single exhaust and both of its ends are connected with flange. It is mainly consisted of body , bonnet, cushion container, piston chamber, disc valve stem and other parts.
2.Both sealed surfaces of the seat and disc are overlaying welded with Fe base stainless steel welding rod so as to improve wear re-sistance and erosion resistance.
安装说明 Installation instruction
1、阀门应垂直安装在设备zui高位置
2、主安全阀紧固在支座上，支座承受主安全阀排汽时产生的反作用力。
3、排汽管应有专门吊架，排汽管重量不得加在主安全阀上。
4、主安全阀与排汽管之间的连接法兰应消除任何的附加预应力。
5、排汽管的zui低点应考虑疏水，以免排汽时产生水击。
1.The main safety valve shall be installed vertically in the highest position of the device.
2.The main safety valve shall be fastened upon the gallow,which sustains the counterforce produced in the steam discharging process of the main safety valve.
3.The exhaust pipe shall contain a special gallow to preventthe force of its weight directly applying on the main safety valve.
4.The connecting flang between the main safety valve andexhaust pipe shall eliminate any extra stress.
5.At the lowest point of the exhaust pipe. water drainage shall be taken into consideration to avoid producing water hammer while discharging steam.
