Large diameter butterfly valve

Performance comparison of large diameter butterfly valve and gate valve:

The gate valve has large volume and takes up large space. It can bear great pressure.

The butterfly valve has small volume and occupies small space. Can withstand the pressure is relatively small.

Specific selection, but also consider the temperature of the medium, valve sealing and packing.

The specification stipulates that the butterfly valve with nominal diameter greater than 50cm shall be used.

Large diameter butterfly valve is a national key new product. High performance manual butterfly valve adopts a double eccentric and a special inclined cone elliptical seal structure. It solves the problem that the sealing surface of traditional eccentric butterfly valve is still in sliding contact friction at the moment of opening and closing from 0 ° to 10 ° and achieves the effect of separating the sealing surface at the moment of opening and sealing at the moment of closing, so as to prolong the service life and achieve the best sealing performance.

Application of large diameter butterfly valve:

It is used for gas pipeline in sulfuric acid industry: inlet and outlet of blower in front of furnace, inlet and outlet of relay fan, electric demister series valve and connecting valve, inlet and outlet of S02 main blower, converter regulation, inlet and outlet of preheater, etc. and cut-off gas volume. It is used in sulfur burning, conversion and dry absorption section of sulfur burning sulphuric acid system. It is the preferred brand of valves for sulfur burning sulphuric acid plant. It is considered by the majority of users as butterfly valves with good sealing performance, light operation, by-product corrosion, high temperature resistance, convenient and flexible operation, safe and reliable use, and has been widely used. It is also widely used in the pipelines of SO2, steam, air, gas, ammonia, CO2, oil, water, brine, alkali, seawater, nitric acid, hydrochloric acid, sulfuric acid, phosphoric acid and other media in chemical, petrochemical, smelting, pharmaceutical, food and other industries as regulating and intercepting devices.

Features of large diameter butterfly valve:

① The unique design of three-way eccentricity makes the sealing surface drive without friction and extends the service life of the valve.

② The elastic seal is produced by torque.

③ The cuneiform sealing surface has the function of zero leakage compensation.

④ Small volume, light weight, light operation and easy installation.

⑤ According to the requirements of users, pneumatic and electric devices can be configured to meet the needs of remote control and program control.

⑥ The material of replacement parts can be applied to all kinds of media, and can be used for lining anti-corrosion (F46, gxpp, Po, etc.).

⑦ Continuous structure diversification: clamp, flange, butt welding.