Shanghai Valve Factory (SVF) Co. Ltd products

It`s used at power boiler, once-through boiler, reheater, superheater, and other steam equipment as overpressure protection device. It adopts double adjusting rings and back pressure jacket to adjust reseating pressure to achieve tiny blowdown, and elastic valve clack can ensure sealing performance at high temperature.

Carbon steel valve is used for equipment or pipelines containing such medium as air, petroleum gas, and liquid; stainless steel valve is used at equipment or pipelines containing corrosive medium, serving as overpressure protection device.

Safety valve for refrigerating machine is used for refrigerating equipment as overpressure protection device; when the operating pressure of equipment rises beyond the allowable value, the valve can open automatically and discharge a rated amount of medium according to the equipment`s operating requirements to prevent equipment pressure from further rising so as to protect the whole system; SFA-22C150T and SFA-22C300T series safety valves made by SVF are overpressure protection device matched with condenser and evaporator of refrigerating machine, and product test and performance meet the requirements of relevant standards as American ANSI B16.34, ANSI/ASHRAE15-78 and Chinese GB12241-12243;

SFNA-42B25C1 type safety valve adopts built-in structure, which occupies a small space, so it`s especially applicable to tank car and similar equipment as overpressure protection device. The working medium shall enter the product below the valve clack, and excess medium is directly discharged to the space. Spring is installed in the inner cavity of valve clack, and the valve has compact structure, small volume, and light weight. The opening pressure is adjusted by turning the adjusting nut, and it`s very easy to use and install.

Compact structure, beautiful appearance, precision casting, and smooth surface. Split type is adopted for valve seat and valve body to facilitate assembly/disassembly and maintenance. Reasonably designed disc holder and adjusting ring make the safety valve open rapidly and reseat timely; the valve seat and valve clack are coated with hard alloy by build-up welding to achieve good wear and erosion resistance and reliable seal, and prolong the service life. Spring is prestressed at constant temperature with stable rigidity and small deviation in set-pressure. Model: A21 A11 A27 A28 A41 A42 A47 A48 A61 A62 A67 A68.

The valve mainly used as overpressure protection device at pressure equipment, vessel or pipelines in such fields as petroleum and gas, chemical engineering, electric power, metallurgy, and urban gas .The valve characterized by transforming spring direct action to pilot valve indirect action; high reseating pressure, good sealing performance, and discharge under high back pressure.

Carbon steel valve is used for equipment or pipelines containing such medium as air, petroleum gas, and liquid; stainless steel valve is used at equipment or pipelines containing corrosive medium, serving as overpressure protection device.

Compact structure, beautiful appearance, precision casting, and smooth surface. The valve seat is separable to the valve body for easy maintenance. The umbrella-type disc holder works with valve seat adjusting ring for adjustment, which can effectively increase the lift force, so that the valve can be fully opened rapidly at a low overpressure to discharge media. The valve can rapidly reseat after overpressure relief to reach satisfactory blowdown.

With three-way runner design adopted, two safety valves with the same model are mounted at one position, in which one is running on line for overpressure protection and the other is standby for maintenance.