Universal Flange — Compatible with ANSI, DIN & JIS

Unlike standard valves that require you to specify one flange standard, our CPVC pneumatic [valve type] features a universal slotted-hole flange design. The elongated bolt holes accommodate the bolt circle diameters (PCD) of ANSI Class 150, DIN PN10/16, and JIS 10K standards — meaning one valve fits all three systems.

This eliminates the risk of ordering the wrong flange standard and lets you standardize your inventory across projects in North America, Europe, the Middle East, and Asia.

Technical Specifications

Material	CPVC
Size Range	2" to 12" (DN50–DN300)
Standard	ANSI/ASTM Schedule 80, DIN (metric), JIS
Connection Type	Flanged
Pressure Rating	PN10 / 150 PSI
Working Temperature	0°C to 90°C
Seal / Diaphragm Material	EPDM, FKM (Viton)
Body Color	Light Grey
Manufactured By	Baodi
Minimum Order Quantity	1 pc (sample) / 10 pcs (order)
Lead Time	5 days (in-stock) / 20 days (custom)
Warranty	12 months

Dimensions

Dimensions of the Huiya CPVC pneumatic butterfly valve in both DIN and ANSI flange standards. All dimensions in mm.

L = face-to-face length　D = flange outside diameter　H1 = height from valve centre to actuator base　H2 = overall height with actuator. All dimensions in mm and for reference; certified drawings are available on request.

Product Overview

The Huiya CPVC pneumatic butterfly valve is an automated quarter-turn valve designed for the on/off control of corrosive and chemically aggressive fluids. The valve body and disc are manufactured from CPVC (chlorinated polyvinyl chloride) using domestic SOE resin with a chlorine content above 60%, giving it stronger temperature and corrosion resistance than standard PVC. It handles a wide range of acids, alkalis and chlorinated media at working temperatures up to 90°C, making it a reliable choice where metal valves would corrode or require costly alloy upgrades.

The valve uses a concentric, resilient-seated design with a one-piece liner that doubles as the body seal, providing bubble-tight shut-off and bi-directional sealing. Seat material can be specified in EPDM or FKM (Viton) to match the process chemical and temperature, while the stainless steel 304 stem ensures durable, low-torque operation. Wafer and lugged body styles are available from 2″ to 12″ (DN50–DN300), conforming to DIN, ANSI/ASTM and JIS standards with EN 558 face-to-face dimensions for easy integration into existing pipework.

Mounted on top is a rack-and-pinion pneumatic actuator in hard-anodised aluminium alloy, available in double-acting or spring-return (single-acting) configurations. Double-acting actuators suit systems with a continuous air supply, while spring-return units provide a fail-safe open or closed position if air pressure is lost. With an IP67 enclosure and an ISO 5211 mounting interface, the actuator accepts standard accessories such as solenoid valves, limit switch boxes and positioners, allowing the valve to be integrated into automated and remotely monitored process lines.

Pneumatic Actuator Options

The valve is driven by a rack-and-pinion pneumatic actuator, available in two configurations. The right choice depends on your air supply and what should happen to the valve if that air supply fails.

Both actuator types operate on a clean, dry air supply of 6 to 8 bar and are built with a hard-anodised aluminium alloy body rated to IP67 for outdoor and washdown environments. The ISO 5211 mounting interface and NAMUR accessory pad allow direct fitting of solenoid valves, limit switch boxes and positioners, so the valve can be configured for simple on/off duty or full remote monitoring and modulating control. Fail-safe direction (open or close) can be specified to match your process safety requirements.

Torque & Flow Data

The following data covers all standard sizes of the Huiya CPVC pneumatic butterfly valve. Use the operating torque values to confirm correct actuator selection for your application.

Kv / Cv values are at full open position. Operating torque is for reference selection of the actuator; final actuator sizing should include a safety factor for the actual service conditions. For large-diameter flow data or custom requirements, please contact our engineering team.

Applications

The Huiya CPVC pneumatic butterfly valve is trusted across industries where corrosive media, automation and reliability are essential.

Key Features & Advantages

Chemical Resistance

The chart below is a general guide for CPVC body and seat material selection. Compatibility depends on concentration, temperature and exposure time — contact our engineers to confirm the right configuration for your specific medium.

✓ Generally suitable　△ Suitable under limited conditions — confirm with our engineers　Ratings are for guidance only and depend on concentration, temperature and exposure.

CPVC Pneumatic Butterfly Valve

Optional Accessories

The valve can be supplied as a complete automated package with the following accessories pre-assembled and tested:

CPVC Pneumatic Butterfly Valve

Huiya CPVC pneumatic butterfly valves are manufactured under an ISO 9001 certified quality management system (Certificate No. 01724Q10514R4S) and an occupational health and safety management system. Valves are designed and tested to API 609 and EN 593, with pressure testing to EN 12266 and MSS SP-61. Every valve is inspected and pressure-tested before shipment.

This butterfly valve is also moulded in PVC for lighter-duty water service, PPH for hot alkalis, and PVDF for concentrated acids and solvents. When you need bubble-tight isolation or full-bore flow, choose the CPVC true union ball valve for serviceable lines or the CPVC flanged ball valve for higher pressure. Not sure which material? Our Material Selection Service will tell you, free. View all CPVC valves.

Standards & Certifications

Huiya CPVC pneumatic butterfly valves are manufactured under an ISO 9001 certified quality management system (Certificate No. 01724Q10514R4S) and an occupational health and safety management system. Valves are designed and tested to API 609 and EN 593, with pressure testing to EN 12266 and MSS SP-61. Every valve is inspected and pressure-tested before shipment.Manufactured by our partner Ningbo Baodi Plastic Valve Co., Ltd., established in 1979.

Product Gallery

Downloads

Frequently Asked Questions