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A69Y DN150主安全阀 (W)
Description:

主要外形及连接尺寸 Main external and connecting dimensions
Type DN Nominal diameter  Connecting dimensions                  
    L L1  H D D1  Dn' D' D1' D2' b'
A69Y-P.455.3V 150 560 638 698 220 165 150 300 250 204 30
A69H-P466.7V 150 560 638 698 220 165 150 300 250 204 30
A69H-P5410V 150 560 638 698 220 165 150 300 250 204 30
A49H-P5410.5V 150 560 638 698 220 165 150 300 250 204 30

A69Y  DN150

说明 Instruction

本装置供蒸汽压力P=10MPa,温度为t=540℃的电站锅炉上使用,防止锅炉介质压力超过允许值,以保证锅炉安全运行。
This device is  used power plant  boilers with steam conditions as: P=10MPa;  t=540 . Ist main function is to avoid the medium pressure inside the boiler  exceeding the allowable value to ensure that the boiler  run safely.

结构简述 Struture briefing

1、阀门为双排汽、两端为法兰连接结构。主要由阀体、连接管、缓冲容器、活塞室、阀瓣、阀杆等零件组件。
2、当介质压力升高至整定压力时,冲量安全阀打开,介质从脉冲管进入主安全阀的活塞室,推动活塞下降,使阀门自动打开,当冲量阀关闭时,阀瓣又自动关闭。
3、密封面用钴基硬质合金堆焊而成,阀瓣经热处理,提高了硬度。

1.  The structure of the valve is of  double exhaust and  both of its  are ends are  connected with flange.  It is mainly consisted of  body,  connecting pipe cushion container, piston chamber, disc,  valve 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 to descend, and then the valve automatically opens; whenthe 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 in improved.

安装说明 Installation instruction

1、主安全阀门必须垂直安装在设备的最高位置。
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,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。
4、排汽管的最低点应考虑疏水,以免排汽时产生水击。
1.The main safety valve shall  be installed vertically 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.

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