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Main safety valve

Diameter: DN 150~250 mm
Medium: Water, Gas
Pressure: ≤4MPa
Applicable Temperature: -29~550°C
Body Materials:Carbon steel, Stainless Steel, Cast iron etc.
Applicable Industry: Urban Construction,Chemical,metallurgy,Oil,Pharmaceutical,Food,Beverage,Environmental protection

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Main safety valve Characteristic use

Usage
This valve is used for power plant boilers, pressure containers, pressure and temperature reducing device and other facilities. It serves to present the pressure exceeding the highest allowable pres-sure value and ensure the safety of the device when working.

Structure briefing
1、When the medium pressure rises to the set pressure, the in-pulse 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 open-s; when the impulse safety valve closes, the disc will slash automatically close.
2、The sealed surface is made of Fe base stainless steel by over-laying welding. Through thermal treatment, the wear resistance and anti-erosion of disc so improved.

Installation instruction
1、The main safety valve shall be installed vertically at the highest. position of the device.
2、The main safety valve shall be fastened upon the gallows, which sustains the back-seat force produced in the steam discharging process of the main safety valve.
3、The exhaust pipe shall contain a special gallows to prevent the force of its weight directly applying on the main safety valve. The connecting Lange At the lowest point of the exhaust pipe, water drainage shall be taken into consideration to avoid producing water hammer while discharging set between the main safety valve and exhaust pipe shall eliminate any extra 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.

GA49H-40 Main safety valve
GA49H-40
GA49H-40 Main safety valve structure drawing
GA49H-40 structure drawing

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