Huiya’s pneumatic plastic valves are air-actuated shut-off and control valves for aggressive-media lines that would corrode metal or overwhelm a hand-operated valve. Each valve below pairs a corrosion-resistant thermoplastic body — UPVC, CPVC, PPH or PVDF — with a double-acting or spring-return pneumatic actuator, in true-union ball, flanged ball and butterfly patterns for automated dosing, isolation and process control.
Not sure a line needs automating at all? Start with manual vs pneumatic valves: when to automate. Ready to specify an air-actuated valve? Our complete engineering guide to selecting a pneumatic ball valve covers seat choice and fail-safe mode, and how to size a pneumatic actuator matches valve torque to actuator output so you order the right size the first time. A pneumatic plastic valve is a thermoplastic-bodied valve driven by a compressed-air actuator, typically at 4–7 bar supply, used where the medium would corrode a metal valve and the line needs remote or automated control.
To match the body material to your chemical and temperature, see our plastic valve material selection guide. In practice: UPVC pneumatic true-union ball valves for general water and dilute chemical dosing; CPVC where the same line runs hot; PPH for concentrated alkalis; and PVDF for strong acids, solvents and high-purity duty.
Choose the pattern by line size and duty: true-union ball valves for DN15–DN100 dosing and isolation where in-line servicing matters; flanged pneumatic ball valves for permanent DN50+ runs on tank farms and skids; and pneumatic butterfly valves for DN50–DN300 bulk isolation where cost and face-to-face length dominate. Or browse the full range of pneumatic valves below — send us your medium, line size and control signal, and our engineers will recommend the right body, actuator and seat.
The Huiya CPVC pneumatic true union ball valve is a true union, two-piece automated valve built for corrosive and high-temperature fluid control in chemical processing, water treatment, electroplating, and mining. Rated up to 93°C (200°F) and PN16, it combines CPVC’s chemical resistance with the fast, reliable on/off control of a pneumatic actuator — and a […]
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CPVC Pneumatic Butterfly Valve The Huiya CPVC pneumatic butterfly valve delivers automated on/off control for corrosive fluids in chemical processing, water treatment and mineral processing systems. The CPVC body resists acids, alkalis and chlorinated media, while the pneumatic actuator enables fast, reliable remote operation. Available from 2″ to 12″ in wafer and lugged styles, with
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