ZHRW series pneumatic triple eccentric butterfly valveDetailed product description：

ZHRW series pneumatic triple eccentric butterfly valve
Product Specifications
Product features: This butterfly valve adopts a three eccentric multi-level metal sealing structure, which has no mechanical wear and can achieve zero leakage. It has excellent bidirectional sealing function and is the best device for regulating flow, cutting off or connecting fluids in pipelines of different media such as petroleum, chemical, metallurgical, power, food, medicine, water supply and drainage, gas transportation, etc. By selecting different materials, it can be applied to media such as water, sewage, seawater, air, steam, coal gas, combustible gases, corrosive media, oil products, and food, with a maximum working temperature of up to 600 ℃.

ZHRW series pneumatic triple eccentric butterfly valve detailed introduction:
Triple eccentric structure: The axis of the valve stem is offset by a dimension A from the sealing surface of the butterfly plate, and offset by a dimension B from the axis of the valve body channel. The rotation axis of the valve seat forms an eccentric angle α with the axis of the valve body channel, thus forming triple eccentricity. When the butterfly valve is opened from 0 ° to 90 °, the sealing surface of the butterfly plate will immediately detach from the sealing surface of the valve seat at the moment of opening. When it is closed from 90 ° to 0 °, only at the moment of closing, the conical sealing surface of the butterfly plate will contact and press the conical seal of the valve seat. So there is no friction between the valve seat and the sealing surface on the butterfly plate, eliminating the possibility of wear and leakage.
Torque seal: The three eccentric structure causes the sealing pressure between the two sealing surfaces of the sealing pair to be generated by the driving torque applied to the valve stem when the butterfly valve is closed. Not only does it eliminate the decrease and disappearance of sealing pressure caused by aging, cold flow, and elastic failure of conventional elastic valve seat elastic materials, but it can also achieve arbitrary adjustment of its sealing pressure by changing the external driving torque, thereby improving the sealing performance of the three eccentric butterfly valve and greatly increasing its service life.
Soft hard laminated metal sealing structure: The butterfly plate sealing ring adopts a soft hard laminated stainless steel sheet and a flexible graphite plate sealing surface, which has the dual advantages of metal hard sealing and elastic sealing, and has excellent sealing performance under both low and high temperature conditions.
Bidirectional sealing: Due to the sealing surface cone angle being smaller than the friction angle of the sealing material, the butterfly plate immediately achieves self-locking when it is closed to the sealing position and can withstand a certain amount of reverse pressure impact.
Fireproof structure: The all metal structure itself has the characteristic of fire safety.
Valve body sealing surface: Made of welded hard alloy or stainless steel, the sealing surface has high strength, good hardness, wear resistance, and can be opened and closed continuously for more than 60000 times without damage.
Sealing ring: The sealing ring is clamped onto the butterfly plate by a pressure plate, making it easy to install, adjust, and replace.
The upper and lower parts of the valve stem are equipped with shaft sleeves to prevent wear and adhesion, thereby improving its service life.
This product is flexible, labor-saving, convenient, and reliable to operate. The connection methods include flange, clamp, butt welding, and lug clamp. It can cut off the medium and adjust the medium flow rate arbitrarily.