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Product Name:Pneumatic Hard Seal Butterfly Valve
Product Classification:Butterfly valves
Product Introduction: The butterfly valve, based on introducing the foreign advanced technology, using sophisticated J-shaped flexible seal ring and three eccentric multi-level metal seal structure, and is widely used in the petroleum, chemical industry, metallurgy, water, electricity and many other areas which media temperature ≤425℃.It is used to achieve piping system as an on-off and flow control components. The valve, using three-eccentric structure, valve seat and disc sealing surface are made of stainless steel with different hardness. And have good corrosion resistance and long life. It’s has the bi-directional sealing function and be in line with national GB/T 13927-92 valve press test standard.
Description Parameters Size Chart Application


1. Three eccentric seal structure, seat and disc almost no wear, with the Seal ring made of stainless steel, with dual benefits of metal seal and flexibility. No matter in the case of low temperature or high. Both with excellent sealing properties, resistant to corrosion, and long service life.
2. The seal ring is made of stainless steel, and having the dual advantages of metal seal and elastic seal.No matter in low temperatures or high, both with excellent sealing properties, resistant to corrosion, long service life.
3. Large size disc using lattice structure, high strength, flow area large, small flow resistance.
4.Disc sealing surface using cobalt-based alloy welding, sealing surface wear resistance and long service life
5. The valve has a two way sealing function, the installation media from the flow restriction are not subject to the impact of spatial location. Can be installed in any direction,
6. Drive can be multi-position(rotated 90°or 180°)to install. Easy to use.

Main parameter:

Main parts material:

Execution standard

D643H-10/16/25/The main external connection dimensions of pneumatic hard seal butterfly valve.(unit:mm)


 After the installation, regular maintenance is necessary. The maintenance scopes are mainly as follows:
(1)  the abrasion condition of sealing surface;
(2)  the abrasion condition of valve stem and its trapezoidal nut;
(3)  the abrasion condition of "O" rubber sealing ring;
(4)  Whether packing is effective;
(5) Whether there is dirt accumulation in cavity;
(6) Whether the trip switch and over torque protection device of the electric valve are in good condition;
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Butterfly Valves | Ball Valves -Beijing High & Medium Pressure Valves Co.,Ltd All Rights Reserved  Website Hotline400-666-1929
Tel:010-51293388  Phone:13901003528  Fax:010-51410308  E-mail:[email protected]
Sales Address: Fengtai District, Beijing West International Trade Building, Building 9, Room B2-1028
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