Flange rubber butterfly valve product overview:
Flange rubber butterfly valve is a conventional butterfly valve preferred for pipeline, which is suitable for water supply and drainage, sewage, food, heating, gas, ship, hydropower, metallurgy, energy system and light textile industries with temperature ≤ 120 ℃ or ≤ 150 ℃, nominal pressure ≤ 1.6Mpa. It has simple structure, small flow resistance coefficient, straight flow characteristics, and no debris. The utility model has the advantages of light weight, convenient installation and small driving torque. The valve can be used not only for cutting off medium, but also for regulating medium flow. According to the user's requirements, the driving device can be manually, electrically and pneumatically operated. Selecting parts of different materials and sealing rings of different materials can adapt to different media and working conditions, so as to achieve the best cost and performance.
flange rubber butterfly valve working principle:
The rotary center of the butterfly plate (i.e. the center of the valve stem) is located on the center line of the valve body and the sealing surface section of the butterfly plate. The butterfly plate can be opened and closed by rotating 90 degrees. The valve seat is made of synthetic rubber. When closing, the sealing surface of the outer circle of the butterfly plate compresses the synthetic rubber valve seat, which causes the elastic deformation of the valve seat and forms the elastic force as the sealing pressure ratio to ensure the sealing of the butterfly valve.
flange rubber butterfly valve features:
The driving mode can be manual, electric or pneumatic.
The flow characteristics tend to be straight and the regulation performance is good.
The seal can be replaced, and the sealing is reliable to achieve two-way sealing.
Small and light, easy to disassemble and repair, and can be installed at any position.
The structure is simple and compact, the operating torque is small, and the 90 ° rotary opening is fast.
The butterfly plate can be coated according to the user's requirements, such as nylon or polytetrafluoroethylene.
The connection between the butterfly plate and the valve rod adopts a pin free structure, which overcomes the possible internal leakage point.
The outer circle of the butterfly plate adopts the spherical shape, which improves the sealing performance and prolongs the service life of the valve, and keeps zero leakage for more than 50000 times of opening and closing under pressure.
Design and manufacture: gb12238 structure length: gb12221 (13 series) flange connection size: gb4216 d41j half lined rubber butterfly valve
Parts list: 1. Valve body 2. Valve seat 3. Butterfly plate 4. Valve rod