Applications petrochemical, power equipment, pharmaceutical machinery, chemical reagent factory, chemical analysis equipment, sewage treatment equipment, scientific instruments and other automatic control system of acid and alkali. The main technical parameters of structural principle: fluorine piston type Ambient temperature: -10--80 ℃ Control mode: normally closed normally open type fluid range: hydrochloric acid, sulfuric acid, solvents, acids and other chemical reagents, alkaline liquids and gases. Fluid temperature: -50 ℃ --150 ℃ standard voltage: AC220V, DC24V (other voltages can be customized) Body material: plastic lined carbon steel, stainless steel inner steel liner tetrafluoroethane plastic lined, stainless steel-lined tetrafluoroethane Spool Material: PTFE (polytetrafluoroethylene, commonly known as plastic king) Electrical connection: connection box (2, regardless of the positive and negative power supply terminal, a ground terminal) Degree of protection: IP54 international standard proof grade: DIIBT4, DIIBT6