The pneumatic butterfly valve is composed of a pneumatic actuator and a butterfly valve. The pneumatic butterfly valve is a pneumatic valve that uses a round butterfly plate that rotates with the stem to do the opening and closing to enable the action, mainly as a cut-off valve, can also be designed to have the function of regulating or breaking the valve and regulating, the butterfly valve is increasingly used in low pressure large and medium diameter pipelines.
Pneumatic butterfly valve classification:
Stainless steel pneumatic butterfly valve, hard seal pneumatic butterfly valve, soft seal pneumatic butterfly valve, carbon steel pneumatic butterfly valve. The main advantages of pneumatic butterfly valve, simple structure, small volume and light weight, low cost, pneumatic butterfly valve the characteristics are particularly significant, installed in the high altitude dark channel, after the two-position five-way solenoid valve control easy to operate, but also to regulate the flow of media.
Classification of pneumatic butterfly valve: pneumatic flange butterfly valve, pneumatic flange butterfly valve The product consists of rubber sealed butterfly valve and carbon steel or stainless steel valve plate and stem. Suitable for temperature ≤ 80 ~ 120 ℃ such as food, chemical, petroleum, electric power, light textile, paper and other water supply and drainage, gas pipeline for regulating the flow and intercepting the role of media.
Pneumatic adjustment butterfly valve is a kind of (valve plate) rotating around the fixed axis perpendicular to the channel, which is composed of piston type double-acting or single-acting (spring reset type) pneumatic actuator and butterfly valve, is a rotary high-performance type adjustment or cut-off valve class, with electric, gas valve positioner or solenoid valve, air filtration pressure reducer, limit switch (valve position back signal), can realize the proportional adjustment of fluid medium in the process pipeline and Two-bit cut-off control, so as to achieve automatic control of the flow, pressure, temperature, level and other parameters of the fluid medium.
Pneumatic butterfly valve, novel structure, valve body structure to meet the narrow space of the pipeline and the formation of a short distance to the clamping structure, external zero leakage, internal leakage in line with national standards.
Pneumatic rubber lined butterfly valve, the connection method has flange, butt clip, sealing lining has buna clear rubber, ethylene propylene rubber, heat resistant ethylene propylene rubber, natural rubber, neoprene, fluorine rubber, polytetrafluoroethylene, according to the chemical nature of the medium has a more reasonable choice.
Pneumatic fluorine lined butterfly valve, anti-corrosion fluorine lined butterfly valve using the combination of two pieces of valve body, the valve seat and body lining integration, when the valve is working, only the full plastic seat and plastic lined butterfly plate and media contact, the product can withstand “in addition to molten alkali metal and elemental fluorine” any media corrosion, which D71F46 stem and butterfly plate (forging) as one, The inner surface of the valve body channel is smooth, with low fluid resistance, high CV value, strong circulation capacity and moderate torque, and a four-stage sealing structure and a resilient gasket seat of temperature-resistant and anti-aging SI rubber outside the sealing surface to achieve zero leakage of the medium.
The main features of the pneumatic expansion butterfly valve are as follows: novel design, reasonable, unique structure, light weight, easy to operate, rapid opening and closing; expansion butterfly valve can be used in addition to the role of regulation and interception, compensate for the thermal expansion and contraction function produced by the temperature difference in the pipeline, but also for the installation of replacement, maintenance of the valve to provide convenience. The sealing part can be adjusted and replaced, and the sealing performance is reliable, etc.