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Detailed Product Description
Main Safety Valve (A49H-4)
900 Series DIN standard safety valves are mainly applied to such trades as petroleum & Natural
gas ,chemistry,electric,metallury and burning gas.As the super-pressure protecting equipment.With
high precision of action,good recyc ling function and fast turning back to seat,operating and
maintaining convenience.
Spring loaded low lift type safety valve
Model: A41H / A47H / A61H
Diameter: DN 25~200 mm
Medium: air, petroleum, water etc.
Pressure: 1.6~32MPa
Applicable Temperature: ¡Ü350¡ãC
Body Materials: Cast Carbon steel (WCB), Cast Stainless steel (1Cr18Ni9Ti, 1Cr18Ni12Mo2Ti)
Applicable Industry: Urban
Construction,Chemical,metallurgy,Oil,Pharmaceutical,Food,Beverage,Environmental protection
A 41 H is to be used in equipments or pipelines of air, petroleum, water and other mediums with
operation temperature no higher than 300℃, while A41Y 16/25/40P is to be used in equipments and
pipelines of corrosive medium with operation tem-premature no higher than 200℃. A47H is to be used
in equipments and pipelines of steam, air, water and other mediums with temper-nature no higher than
350℃. When the pressure in equipment or pipeline exceeds allowed value, the valve will open
automatically and fully discharge, then close again when the pressure lowered to the regulated value
so as to ensure the safe operation of the equipment or pipeline.
A61H Spring loaded low lift type safety valve
Model: A61H; A
Diameter: DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250,
DN300, DN350, DN400, DN450
Medium: Water
Pressure: 0.6MPa,1.0MPa, 1.6MPa
Applicable Temperature: -30¡ãC~80¡ãC
Body Materials: 304 stainless steel, 316 stainless steel cast steel, carbon steel,
Applicable Industry: Urban
Construction,Chemical,metallurgy,Oil,Pharmaceutical,Food,Beverage,Environmental protection
A61H/Y-160, A61H/Y-320 is to be used as over-pressure protection device in equipments and
pipelines of mediums like air, ammonia, petroleum and other mediums with operation temperature no
higher than 200℃, while A61Y-160P, A61Y-320P is to be used as a in equipments or pipelines of
corrosive gas or liquid with temperature no higher than 200℃.
Pilot operated safety valve
Model: A46F/Y;
Diameter: DN 25~200 mm
Medium: petroleum & natural gas, chemistry, electric, metallurgy & burning gas
Pressure: 1.6~10MPa
Applicable Temperature: ¡Ü425¡ãC
Body Materials: Carbon Steel WCB etc.
Applicable Industry: Urban
Construction,Chemical,metallurgy,Oil,Pharmaceutical,Food,Beverage,Environmental protection
Pilot operated safety valve, newly-structured, is mainly applied to such trades as petroleum & natural
gas, chemistry, electric, metallurgy & burning gas. It is the best super-pressure protecting equipment
on press equipment, container, or pipeline. It is mainly characterized by shifting direct function of spring
to indirect function of guide valve. What¡¯s more, main valve, applying for sleeve piston & double sealed
seat, is characterized by high precision of action, good recycling function, fast turning back to seat,
ability to high-pressure leaking, long working time & security, together with readjustment on line,
automatic turning back to seat after leaking again and again, tight closure, operating and maintaining
convenience.
Main safety valve
Diameter: DN 150~250 mm
Medium: Water, Gas
Pressure: ¡Ü4MPa
Applicable Temperature: -29~550¡ãC
Body Materials:Carbon steel, Stainless Steel, Cast iron etc.
Applicable Industry: Urban
Construction,Chemical,metallurgy,Oil,Pharmaceutical,Food,Beverage,Environmental protection
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.
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