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.
PVDF Pneumatic True Union Ball Valve When a line carries 98% sulfuric acid, hydrofluoric acid, aqua regia or 18 MΩ ultra-pure water, an ordinary plastic valve is a failure waiting to happen. The Huiya PVDF pneumatic true union ball valve is built for exactly these duties — a two-piece automated shut-off valve moulded from 100% […]
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PVDF Pneumatic Flanged Ball Valve The Huiya PVDF pneumatic flanged ball valve brings PVDF’s extreme chemical resistance to larger-diameter, higher-pressure and high-vibration lines. Moulded from 100% virgin PVDF and rated to 120°C, it resists 98% and fuming sulfuric acid, hydrofluoric acid, aqua regia, halogens and aggressive solvents. Its one-piece flanged body bolts directly to ANSI,
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PVDF Pneumatic Butterfly Valve The Huiya PVDF pneumatic butterfly valve gives compact, automated isolation and flow control on large-bore lines carrying the most aggressive media. With a virgin-PVDF body and disc rated to 120°C, it resists concentrated acids, halogens and solvents, while the wafer design keeps weight and cost far below a solid PVDF ball
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PPH Pneumatic Butterfly Valve The Huiya PPH pneumatic butterfly valve is a large-bore automated valve for hot alkaline and corrosive media up to 85°C — built for the high-flow lines where caustic, effluent, and process slurries demand a material that won’t soften or corrode. Made from polypropylene homopolymer (PPH) in sizes DN40 to DN1000, its
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PVC Pneumatic Butterfly Valve The Huiya PVC pneumatic butterfly valve — UPVC in DIN markets — is a large-bore, wafer-type automated valve for ambient-temperature water, seawater, and wastewater, sizes DN40 to DN500. For pipes above DN100, it’s far lighter and more economical than a flanged ball valve, and its universal slotted-hole flange fits ANSI, DIN,
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PVC Flanged Pneumatic Ball Valve The Huiya PVC flanged pneumatic ball valve — UPVC in DIN-standard markets — is a large-bore, full-port automated valve for ambient-temperature water and chemical service, sizes DN15–DN200. Available in ANSI Class 150, DIN PN10, and JIS 10K flange standards, its one-piece molded flange eliminates root leakage — making it ideal
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PPH Flanged Pneumatic Ball Valve The Huiya PPH pneumatic flanged ball valve is a large-bore, full-port automated valve for hot alkaline and corrosive service in chemical, metallurgical, and wastewater applications. Available in ANSI Class 150, DIN PN10, and JIS 10K flange standards and sizes DN15–DN200, its one-piece molded flange eliminates root leakage — the ideal
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PVC Pneumatic True Union Ball Valve The Huiya PVC pneumatic ball valve — also known as a UPVC ball valve in DIN-standard markets — is a true union, full-port automated valve for ambient-temperature water, chemical dosing, and seawater service. Made from UPVC and rated to 60°C and PN16, it delivers excellent corrosion resistance at the
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PPH Pneumatic True Union Ball Valve The Huiya PPH pneumatic ball valve is a true union, full-port automated valve engineered for hot alkaline and corrosive fluids — the applications where PVC, CPVC, and even PVDF reach their limits. Built from polypropylene homopolymer (PPH) and rated to 85°C, it is the material of choice for caustic
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CPVC Flanged Pneumatic Ball Valve The Huiya CPVC flanged pneumatic ball valve is a large-bore automated valve for corrosive and high-temperature fluid control in chemical processing, water treatment, and mining. Available in ANSI Class 150, DIN PN10, and JIS 10K flange standards and sizes from DN15 to DN200, it pairs CPVC’s chemical resistance with a
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