The performance of short glass fiber reinforced composites is not high. The upper limit of the working temperature of various FRP valves is generally 120~140 ℃, and the working pressure is 0.8~1.0MPa. This working pressure range is only equivalent to the working pressure range in the low-pressure area. The glass fiber reinforced plastic for pneumatic ball valve introduced in this paper is a composite material with continuous glass fiber cloth as reinforcement and vinyl ester resin as matrix material. FRP reinforced with continuous glass fiber cloth has the advantages of good impact strength, small creep, good heat resistance and small molding shrinkage. Similar to the application conditions of FRP pipes, vinyl resin has good temperature resistance, corrosion resistance and processing performance, and is often used for anti-corrosion protection of chemical equipment.

Introduction of hydraulic and pneumatic butterfly valve connector
Pneumatic butterfly valve (belonging to the category of high-pressure rubber hose) joints are classified into transition type pipe joint, ferrule type pipe joint, three-way pipe joint, non-standard pipe joint, flared pipe joint, right angle pipe joint, rotary pipe joint, quick joint, stainless steel pipe joint, copper joint.
The most significant difference between the hydraulic pneumatic butterfly valve connector and the ordinary hose connector is that the hydraulic pressure is amazing, and the impact of the sudden burst oil of the hydraulic oil pipe is great. In this way, we can't use ordinary special connectors for exchange. Because the hydraulic ones can accept a lot of pressure, the ordinary pressure of up to 0.5 air pressure used to be very poor. Now our hydraulic pipe connector technology is far behind that of foreign countries. The hydraulic talent website reminds all friends in the hydraulic industry to exchange and carry out China's own hydraulic pipe connector technology.