法兰安全阀

A49Y

用途 Usage

主要用于电站锅炉、压力容器、减温减压装置等设备，防止压力超过允许最高压力值，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、该阀主要有阀体、阀盖、阀瓣等零件组成，通过调节弹簧来调节冲量安全阀开启压力。
2、该阀带有用来开启或关闭的电磁铁，机械和电器动作互不干忧。 
3、阀座、阀瓣密封面均由铁基铬镍不锈钢堆焊而成。
1. The structure of the valve of  double exhaust and both of its ends are connected with flange. It is mainly consisted of boby,  bonnet,cushion container,  piston chamber,  disc, stem and other parts. 
2.When the medium pressure rises to the set  pressure, the impulse safety valve opens,  and the medium in the impulse pipe enters into the piston chamber of the main safety valve from impulse pipe, forcing the piston descend, and then the valve automatically opens; when the impulse safety valve closes, the disc will also automatically close.
3.The sealed surface is made of hard alloy of cobalt by overlaying welding. Through thermal treatment, the hardness of disc is improved.

安装说明 Installation instruction

1、脉冲安全阀A49H-PW5414V DN20应与A69Y-PW5414V DN100、脉冲安全阀A49H-PW542.55V DN25与A49Y-PW542.55V DN200型主安全阀配套使用。
2、脉冲安全阀安装时应严格垂直，阀杆向上，应将管路冲洗干净。
3、脉冲安全阀引出管与主安全阀的入口管之间的距离，电接点压力表和主安全阀入口管之间的距离，不得小于5倍主安全阀入口管径，以免主安全阀动作时，因排汽影响电接点压力表和脉冲安全阀工作的正确性。
4、该阀与电磁铁一起装在一个专门的支架上，阀门与电磁铁连接要灵活，不得有卡涩现象。
1.  The main safety valve shall  be installed vertically  at the highest position of  the deivce.
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 prevent  the force of its weight directly applying on the  main safety valve. The connecting lange between the main safety valve and exhaust pipe shall eliminate anyextra stress.
4.  At the lowest point of  the exhaust pipe,  water drainage shall  be taken into consideration to avoid producing water hammer while discharging steam.