Product Description

A*8Y  type safety  valve  is  used  for  power  plant  boilers,  pressure  containers,  pressure  and

temperature reducing devices and other facilities.

Structure briefing

1.  This  safety  valve  is  noted  for  elegant  design,  no  leakage,  setting  pressure  precision,  greatly

discharge and easily adjusted.

2. Nozzle seat: It is the nozzle type seat, the stem reaches the velocity of sound when

passing  the  exit  way  of  the  seat,  the  sealing  surface  is  welded  by  cobalt  hard  alloy  with  great

corrosion resistance and long durability.

3. Thermo elastic disc: the disc is of thermo elastic structure, taking the advantage of its flexibility

to raise the seal ability, and solve the pre-discharge phenomenon effectively.

the sealed surface of the disc has adopted the advanced technology of heat harding to increase

the hardness and the ability of anti-friction and corrosion resistance.

4.  Adjusting  nut:  adjust  the  compression  amount  of  spring  by  using pet  nut  so  that  the  valve

can acquire appropriate set pressure rapidly and easily.

 Installation instruction

1. The safety valve shall be installed vertically and it would be better to install the valve directly

upon the adaptor of the container or pipe, the inside diameter of the adaptor shall be no less than

that of the inlet pipe.

2. To avoid the thermal stress which caused by the thermal expansion of the discharge pipe, the

exit  way  of  the  safety  valve  shall  be  expansion  with  appropriate  joint,  the  inside  diameter  of

discharge pipe should large than the exit way of valve, and the pipe length shall be as short as

possible and without bent.

3. The exit way of the muffer shall have enough area, in order to avoid producing back pressure to affect the discharge ability of the valve.