Vacuum butterfly valve，Vacuum valve，butterfly valve

Youdaoplaceholder0 The vacuum butterfly valve is a valve specifically designed for vacuum systems, featuring a compact and efficient design and excellent vacuum sealing performance ‌. Vacuum butterfly valves usually adopt a short structure design. The valve plate and the valve stem are coaxially connected. The overall volume is small, and the occupied space is only 1/3 to 1/2 of that of traditional gate valves or ball valves. This design not only saves pipe installation space, but also makes it convenient to use ‌ in narrow working conditions or dense equipment layouts

Structural characteristics

The valve plate of the vacuum butterfly valve is disc-shaped, thin, and the sealing contact surface with the valve seat is precisely machined to ensure full opening or full closing action can be completed by rotating 90°, short operating stroke, quick opening and closing (typical opening and closing time ≤10 seconds) ‌

one. The material selection for the valve body and valve plate takes into account both strength and lightweight. Common materials include stainless steel (such as 304, 316L), aluminum alloy, titanium alloy, etc. Stainless steel material has become the mainstream choice in vacuum environments due to its strong corrosion resistance and high strength. Aluminum alloy material, with the advantage of light weight and low cost, is suitable for low pressure vacuum systems with low load requirements ‌

Working principle

The vacuum butterfly valve achieves efficient sealing through multiple designs:

Youdaoplaceholder0 Sealing structure optimization ‌ : The sealing surfaces of the valve plate and the valve seat are designed with double or triple eccentricity. The double eccentric structure (axial and radial eccentricity) enables the valve plate to disengage from the valve seat at the initial stage of opening, reducing friction. The three-eccentric structure (with additional angular eccentricity) further enables frictionless opening and closing of the valve plate and valve seat, and the squeezing force generated by the eccentricity when the sealing surface is closed can form a hard metal seal or an elastic seal ‌

Youdaoplaceholder0 Differential pressure assisted sealing ‌ : In a vacuum system, the pressure difference on both sides of the valve plate (atmospheric side pressure > vacuum side pressure) naturally exerts a clamping force on the valve seat, enhancing the sealing effect. This characteristic makes the vacuum butterfly valve seal better under forward pressure (atmospheric to vacuum) than under reverse pressure (vacuum to high pressure), so pay attention to the medium flow direction indication ‌ when installing

Youdaoplaceholder0 The application fields of vacuum butterfly valve are very extensive, mainly including the following aspects ‌ :

Youdaoplaceholder0 Chemical Industry ‌ : In the chemical industry, vacuum butterfly valves are widely used in various process flows due to their advantages such as simple structure, strong conduction capacity and fast opening and closing speed. It is suitable for small bore vacuum pumping systems and large bore vacuum systems such as particle accelerators, fusion reactors, etc. ‌

Youdaoplaceholder0 Metallurgy, power, oil and gas industries ‌ : Vacuum butterfly valves are also commonly used in piping systems in these industries, especially when dealing with corrosive media. For example, in metallurgy, power, petroleum and chemical industries, vacuum butterfly valves are used to control the flow of gas and medium ‌

Youdaoplaceholder0 Air and gas systems ‌ : In air and gas systems, vacuum butterfly valves are used to regulate and control the flow and pressure of gases to ensure the stable operation of the system ‌

Youdaoplaceholder0 Water supply and drainage system ‌ : In the water supply and drainage system, vacuum butterfly valves are used to control and cut off the water flow to ensure the normal operation of the system ‌

Youdaoplaceholder0 Other industrial applications ‌ : In addition, vacuum butterfly valves are also used in pipeline systems of industries such as rubber, papermaking, and pharmaceuticals as devices for diverting, converging, or switching the flow direction of media ‌

Packing of Standard Packing: 

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 470 gallon liquid totes Special package is available on request. E FORUs’  is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.