Detailed Product Description

A49Y Main safety valve
Model: A69Y/A49Y
Diameter: DN 150 mm
Medium: Steam, Water etc.
Pressure: ¡Ü10MPa
Applicable Temperature: ¡Ü540¡ãC
Body Materials: Stainless steel etc.
Applicable Industry: Urban
Construction,Chemical,metallurgy,Oil,Pharmaceutical,Food,Beverage,Environmental protection

Usage
This device is used for power plant boilers with steam conditions as: P=10Mpa; t=540℃. Its main
function is to avoid the medium pressure inside the boiler exceeding the allowable value to ensure that
the boiler run safely.
 
Structure briefing & Installation instruction 

   1、The structure of the valve is of double exhaust and both of its 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 tars into the piston chamber of the main safety valve from impulse
 pipe, forcing the piston to descend, and then the valve automatically opens; When the impulse
 safety valve closes, the disc will also automatically close.
   The sealed surface is made of hard alloy of cobalt by overlaying welding. Through thermal
 treatment, the hardness of disc is improved.
   The main safety valve shall be installed vertically at the highest position of the equipment.
   The main safety valve shall be fastened upon the support, which sustains the counterforce
 produced in the steam discharging process of the main safety valve.
   The exhaust pipe shall contain a special gallows to prevent the force of its weight directly
 applying on the main safety valve. The con-nesting Lange between the main safety valve and
 exhaust pipe shall eliminate any extra stress.
   At the lowest point of the exhaust pipe, water drainage shall be taken into consideration to avoid
 producing water hammer while discharging steam.