Installation instruction:

       1. The main safety valve, A49Y-PW54-10V,  DN125, and the impulse safety valve ,  A49Y-PW5410V,  DN20, should be installed together. The distance between the outlet pipe of the impulse safety valve and the inlet  pipe of the main safety valve should be maintained as relatively long and the distance between the electric contact  pressure meter and the inlet  pipe of the. main  safety valve should be no less than 5  times of  the diameter of  the inlet pipe,  for fear that the precision of the meter and the impulse safety valve may be affected by the steam discharging process of the main safety valve.
        2. Before the installation of the impulse safety valve, the pipelineshall be cleaned first.
         3. The main safety valve and the impulse safety valve must be positioned vertically, After  the installation and the welding the mainsafety valve, it  shall be under  partial hear treatment.
         4. The main safety valve shall be fastened upon the framework.which sustains the counter-reaction force produced in  the steamdischarging process of  the main safety valve. The exhaust  pipe of the main safety valve shall be supported with a special gallow lest the force of its weight and action  would be directly  apply to both the main safety valve and  the flange that is connecting them. At the lowext point of  the exhaust pipe water  drainage shall be taken into consideration to avoid producing water hammer when the main safety valve is discharging steam.
         5. The impulse  safety valve and the electromagnets shall be placed together on a special  gallow. The juncture of the upper  lever of the valve and the electromagnets shall  be flexible, with no phe-nomenon of seizure. The impulse safety valve shall be installed in a place with little dust, dry  air and convenient maintenance and de-bugging, and where no vibration occurs, Its ambient temperatur e shall not higher than 70 , and its relative humidity not  more than 80%.
         6. To ensure the ajile working of  the impulse safety valve, the distance between the circular  arc part of  the head of  the seat re-turning lever and the end of  the pressure bar  of the valve shall be adjusted to the length of  the actual traved of the valve adding 1 mm (adjusted by the M10X40 fastening screw at the top of the cap).