Tianjin flange butterfly valve design features!

Tianjin flange butterfly valve design features!

Flange butterfly valve has a small and lightweight, easy to disassemble and repair the point, but also in any position to install. Simple structure, compact, small operating torque, 90 ° turn open quickly. Flow characteristics of a straight line, good regulatory performance. The connection of the butterfly plate to the stem uses a pinless construction to overcome possible leaks. Butterfly plate cylindrical use of spherical shape, improve the sealing performance and extend the service life of the valve, with pressure to open more than 50,000 times still keep zero leakage. The seal can be replaced and the seal is reliable for bi-directional sealing. Butterfly plate can be sprayed according to user requirements, such as nylon or polytetrafluoroethane. The valve can be designed for flange connection and clamp connection. Drive mode can be selected manually, electric or pneumatic.

Flange butterfly valve is mainly butterfly valve and flange link, flange butterfly valve has some essential characteristics. The valve body material for the carbon steel, body, flange butterfly butterfly plate to accept the form of steel plate welding, the advantage is the whole light weight, and steel than the cast iron caused by high sealing, easy to ensure that the valve in high vacuum work. In order to prevent the welding stress deformation, welding, the stress treatment to ensure that the installation until the installation is not deformed to ensure the performance of the valve.

Here you tell the design features of the flange butterfly valve:

1. Two-way seal

Usually the traditional flange butterfly valve, because of its structural reasons, in the opposite direction (not conducive to the direction of sealing) working pressure, can not be a good seal, the relevant national standards are not mandatory for two-way seal, but the company designed the valve can be To ensure that the PN case to achieve the effect of two-way seal. Can be used through the bolts can also be used single-sided bolts were connected to facilitate the replacement, maintenance of the pipeline. Shaft and plate can be used taper pin, torque screw or no pin connection, to achieve opening and closing. Bilateral flange according to the connection standard will be made all the correction holes, easy to find in the installation process.

2. Self-sealing design concept

The valve seal is directly fitted with a rubber in a zigzag shape without the use of a compression ring or a bolt, thereby avoiding the use of a conventional bolt-type seal and the resulting unevenness of the seal, causing the bolt to fall off and the seal is prematurely damaged The The sealing ring in the opposite direction under the action of the pressure, resulting in self-sealing force, so that the seal pressure increases, the seal ring valve seat, the greater the pressure in the opposite direction, the greater the self-sealing force, so that the seal and the valve seat Combined with close, to achieve the effect of two-way seal.

3. Valve flap good, not easy to deformation

Flange butterfly valve DN300 above the valve flap for the double-plate truss flow structure, flow resistance is small, good rigidity, in the opposite direction of the working pressure, it is not easy to produce deformation, so that the valve ring will not be separated from the valve seat Sealing point, thus ensuring the sealing effect of the seal.

Tianjin Cinders Valve Manufacturing Co., Ltd. main products: Tianjin butterfly valve manufacturers, Tianjin high wear-resistant butterfly valve, Tianjin, copper butterfly valve, Tianjin flange butterfly valve, Tianjin desulfurization butterfly valve, Tianjin anti-corrosion butterfly valve, Tianjin folder butterfly valve. Tel: 13821219166

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