product overview

Used for gas pipelines in the sulfuric acid industry: inlet and outlet of furnace front blower, inlet and outlet of relay blower, series and connecting valves for electric mist removal, inlet and outlet of S02 main blower, converter adjustment, preheater inlet and outlet, etc., for regulating and cutoff gas volume.
Used in the sulfur burning, conversion, and dry absorption sections of sulfur based sulfuric acid systems, it is the preferred brand of valves for sulfur based sulfuric acid plants. It is widely regarded by users as a butterfly valve with good sealing performance, light operation, secondary corrosion, high temperature resistance, easy and flexible operation, and safe and reliable use. It has been widely promoted and used.
It is also widely used as a regulating and shut-off device in pipelines for media such as SO2, steam, air, coal gas, ammonia, CO2 gas, oil products, water, salt water, alkali solution, seawater, nitric acid, hydrochloric acid, sulfuric acid, phosphoric acid, etc. in industries such as chemical, petrochemical, smelting, pharmaceutical, and food.

Structural features:

① The unique design of three-way eccentricity ensures frictionless transmission between the sealing surfaces, extending the service life of the valve.
② Elastic sealing is generated by torque.
③ The clever wedge-shaped design enables the valve to have an automatic sealing function that becomes tighter as it is closed, with compensatory and zero leakage between the sealing surfaces.
④ Small size, light weight, easy operation, and convenient installation.
⑤ Pneumatic and electric devices can be configured according to user requirements to meet the needs of remote control and program control.
⑥ Changing the material of the parts can be applied to various media and can be used for lining anti-corrosion (lining F46, GXPP, PO, etc.).
⑦ Diversified continuous structures: clamps, flanges, and butt welds.

Execution standards:

① Design and Manufacturing: GB/T12238-89 "General purpose valve flange and clamp connection butterfly valve" JB/T8527-1997 "Metal sealed butterfly valve" JIS.
② Flange size:
PN=1.0MPa according to JB/T82.1-94 (original standard JB82-59) "Convex Welding Steel Pipe Flanges".
PN=1.6MPa according to GB9113.3-88 "Convex Integral Steel Pipe Flanges".
PN=2.5MPa according to GB9113.4-88 "Convex Integral Steel Pipe Flanges".
③ The structural length shall be in accordance with GB12221-89 "Structural Length of Flanged Metal Valves".
④ Inspection and testing shall be conducted in accordance with GB/T13927-92 "General Valve Pressure Test".