Chemical principle of pneumatic valve selection and variety

chemical description of pneumatic valves:
chemical pneumatic valve is a kind of important industrial pipeline flow control on the attachment, in the face of complex industrial systems and pneumatic valves are a great variety of different conditions, want to choose suitable for pneumatic valves, pipeline system and understand the performance of the pneumatic valve should grasp two steps of pneumatic valves and basis of the three should follow the principle of choosing pneumatic valves for petroleum, chemical industry.
chemical pneumatic valve is not only applicable scope is wide, and the dosage, chemical industry, of course, pneumatic valve to be higher than ordinary pneumatic valve requirements. Chemical pneumatic valves generally use media are relatively easy to corrosion, simple chlor-alkali industry, to large petrochemical enterprises, there are high temperature, high pressure, corrosion resistance, abrasion resistance, temperature, pressure difference is very big. Facing the high risk of pneumatic valves, shall be in strict accordance with the chemical industry in the process of selecting and using standard execution. A minister pneumatic valve co. , LTD. Is a professional chemical manufacturer, manufacturing in strict accordance with the standard of chemical manufacturing.
chemical pneumatic valve selection principle:
chemical industry generally choose port for straight-through type pneumatic valve, the flow resistance is small, usually choose as deadline and open media use pneumatic valve, easy to adjust flow as control flow with pneumatic valve, cock pneumatic valve and ball valve is suitable for reversing shunt, shut down along the sealing surface of sliding with wiping the pneumatic valves are best suited for medium with suspended particles. Common chemical pneumatic valves with pneumatic pneumatic ball valve, gate valve, globe pneumatic valve, safety valve, cock pneumatic valve, check valve, etc. Chemical pneumatic valve mainstream media with chemicals, acid and alkali corrosive medium containing various, a minister chemical manufacturer of pneumatic valve main L and material aspects, ordinary medium as the dominant material choice, the combination of many chemical fluid with alloy steel or rubber fluorine pneumatic valves.
chemical type pneumatic valve:
open-close type: cut off or communication pipe fluid flow;
external regulation: adjust the flow rate, flow velocity;
the throttle type: after making the fluid through the pneumatic valve produces a lot of pressure drop; Other type:
a. Automatic opening and closing b. To maintain a certain pressure c. Vapor barrier drainage.
chemical pneumatic valve before use notice:
1) pneumatic valve inside and outside surface defects such as sand holes, cracks;
2. Pneumatic seat and aerodynamic body joint is rigid, it fits the pneumatic valve seat, pneumatic valve core sealing surface with and without defects;
(3) pneumatic valve rod connected to the pneumatic valve core is flexible and reliable, pneumatic valve stem is bent, thread is damaged;
steel flange chemical industry standard:
chemical engineering construction technical specifications' HGJ - HGJ - 】
chemical standards; The European system' HG- HG- 】
chemical standards; The European system' HG- HG- 】