WESDUN D343H hard seal butterfly valve is a new generation of patented product which is independently researched and developed by our company, no pin connection is through a valve rod milling flat straight connected with the butterfly plate matched, It is fixed with countersunk bolts, makes assembly easier and the connection more secure and firm.
It use triple eccentric sealing structure, no mechanical wear, can achieve zero leakage, with bidirectional sealing function superior. this style valve is used as the best device in oil, chemical industry, metallurgy, electric power, building materials, food, medicine, water supply, and drainage, gas delivery of different media, such as adjust, cut off or connected to the fluid flow.
Application：
▪Potable water supply pipelines and treatment plants.
▪Transportation of filtered and recycled water.
▪Irrigation distribution networks.
▪Water-pumping stations and hydroelectric plants.
▪Reservoirs.
▪The triple eccentric butterfly valve is a kind of butterfly valve that the stem axis deviates from the center of the disc and the center of the body at the same time, and the rotation axis of the valve seat has a certain angle with the axis of the valve body.
▪Double safety structure design.
The triple eccentric butterfly valve is designed with double safety structure to prevent the deformation of the butterfly plate, the misalignment of the valve stem, and the biting of the sealing surface caused by the influence of fluid pressure and temperature. This valve is equipped with two independent thrust rings on the lower side of the butterfly plate, to ensure the normal operation of the triple eccentric butterfly valve under any working conditions.
▪No dead zone design, small opening torque.
The shape of the valve plate of the triple eccentric butterfly valve is an elliptical cone, and its surface is welded with hard alloy, which has excellent wear resistance. The floating U-shaped stainless steel seat has the function of automatically adjusting the center. When the valve is opened, the elliptical cone sealing surface valve plate first detaches from the U-shaped elastic valve seat, and then rotates.
▪Zero leakage, high temperature and high pressure resistance.
The biggest feature of triple eccentricity is that it fundamentally changes the sealing structure. It is no longer a positional seal, but a torsion seal, that is, it does not rely on the elastic deformation of the valve seat, but completely relies on the contact surface pressure of the valve seat to achieve the sealing effect.
