In this paper, the mechanical properties of continuous glass fiber reinforced glass fiber reinforced plastic (GRP) are studied experimentally at first, and the design points of GRP pneumatic ball valve are derived on the basis of known GRP material performance parameters.
3. Pneumatic ball valve materials are mainly made of epoxy resin and phenolic resin (including its modified varieties, such as polyvinyl butyral modified phenolic resin, xylenoldehyde modified phenolic resin, epoxy phenolic resin, etc.), which are currently used to manufacture valves in China. Polyacetate glass fiber reinforced plastic valves and modified xanthan resin glass fiber reinforced plastic valves are also produced in a small amount. The glass fiber as reinforcement material has different forms, but limited to the molding process, it is mainly reinforced by chopped fiber.

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