CPVC Air Release Valve

A CPVC Air Release Valve is a valve made from Chlorinated Polyvinyl Chloride (CPVC) material that is designed to automatically release trapped air or gases from piping systems while preventing the escape of liquid. It is commonly installed in liquid pipelines to maintain system efficiency, prevent air locking, reduce pressure surges, and protect pumps and equipment. A CPVC Air Release Valve is a corrosion-resistant plastic valve used in piping systems to automatically remove trapped air and gases during operation.

CPVC Air Release Valve Manufacturer and Supplier in India. In pressurized piping systems, an automatic CPVC air release valve is essential. The air locked in the pipe will gradually rise upwards and accumulate at the highest points of the system. Pump breakdown, incorrect instrumentation measurements, malfunctions, flow problems, and pressure spikes can all be caused by trapped air. Unwanted air in the tube also makes the pump work harder, which uses more power.

CPVC Air Release Valve Details

d – Outside Diameter (mm),
DN – Nominal Diameter (Diameter Nominal),
PN – Nominal Pressure (Pressure Rating),
C – Face-to-Face / Length of Engagement,
H – Total Height,
L – Length,
L1 – Extended Length / Additional Length,
Z – Center-to-End Distance
g – Approx. Weight (grams)

d	DN	PN	C	H	L	L1	Z	g (Weight)
20	15	16	55	103	16	18	87	105
25	20	16	66	125	19	20	106	185
32	25	16	75	150	22	24	128	280
40	32	16	87	171	26	28	145	415
50	40	16	100	187	31	34	156	570
63	50	16	122	223	38	41	185	950

Parameter	Specification
Material	CPVC body, PTFE / EPDM seals, Stainless steel internal parts
Valve Type	Automatic Air Release Valve (Single/Double Orifice)
Size Range	½” to 2” (15 mm to 50 mm)
End Connection	Socket / Threaded (BSP / NPT)
Operating Pressure	0.5 – 10 bar (depending on model & size)
Maximum Temperature	0°C to 90°C
Function	Releases trapped air automatically from pipelines
Operation	Automatic float-operated mechanism
Sealing	PTFE or EPDM sealing for leak-proof operation
Standards	ASTM D1784, ASTM F1970
Maintenance	Easy to disassemble and clean
Flow Type	Air discharge only, liquid-tight during operation
Density	1.50 – 1.60 g/cm³
Tensile Strength	50 – 70 MPa
Impact Strength	High
Hardness	Rockwell R 110 – 120
Thermal Conductivity	~0.14 W/m·K
Coeff. of Thermal Expansion	6.7 × 10⁻⁵ /°C
Vicat Softening Temp.	~110°C
Water Absorption	< 0.1%
Chemical Resistance	Excellent (acids, alkalis, salts)
Corrosion Resistance	Non-corrosive
Electrical Insulation	Excellent

High Corrosion Resistance
Made from CPVC material, offering excellent resistance to chemicals, acids, and alkalis.
Automatic Operation
The float-type mechanism automatically releases trapped air without manual intervention.
High Temperature Capability
Suitable for hot water and industrial fluids up to approximately 90°C.
Pressure Resistant Design
Designed to handle typical industrial pressure ratings (PN10 / PN16 depending on model).
Leak-Proof Sealing
Equipped with EPDM or Viton seals to ensure tight shut-off.
Lightweight Construction
Easier handling and installation compared to metal air valves.
Durable & Long Service Life
Non-metallic body prevents rusting and scaling.
Low Maintenance Requirement
Smooth internal surface reduces clogging and buildup.
Compact Design
Space-saving structure suitable for vertical pipeline installation.
Chemical Compatibility
Suitable for water treatment, chemical processing, and industrial fluid systems.

Valve Size	Nominal Pressure (PN)	Working Pressure @ 23°C	Working Pressure @ 60°C	Working Pressure @ 90°C
½” (15 mm)	PN10 / PN16	10–16 Bar	6–10 Bar	4–6 Bar
¾” (20 mm)	PN10 / PN16	10–16 Bar	6–10 Bar	4–6 Bar
1″ (25 mm)	PN10 / PN16	10–16 Bar	6–10 Bar	4–6 Bar
1½” (40 mm)	PN10	10 Bar	6–8 Bar	4–5 Bar
2″ (50 mm)	PN10	10 Bar	6–8 Bar	4–5 Bar

If you are searching for customized product designs that meet your requirements, don’t worry. Petron Thermoplast also offers custom product manufacturing services to meet the unique needs of various industries. Work with our expert engineers to create custom designs suited for your application.

Benefits of Using CPVC Air Release Valve

Prevents Air Locking

Automatically releases trapped air, ensuring smooth fluid flow.

Improves System Efficiency

Eliminates air pockets that reduce pump performance and flow capacity.

Reduces Water Hammer

Minimizes pressure surges caused by trapped air, protecting pipelines.

Corrosion Resistant

CPVC material provides excellent resistance to chemicals, acids, and alkalis.

High Temperature Resistance

Suitable for hot water and process fluids.

Lightweight & Easy Installation

Easier to handle compared to metal air valves.

Low Maintenance

A non-corrosive body reduces scaling and internal damage.

Long Service Life

Durable construction ensures extended operational life.

Cost-Effective

Lower installation and maintenance cost compared to metal valves.

Chemical Compatibility

Ideal for chemical processing, water treatment, and industrial applications.

Types of CPVC Air Release Valve

1️.Single Orifice Air Release Valve

Releases small pockets of trapped air during system operation.
Suitable for pressurized liquid pipelines.
Commonly used in Oil, gas supply and chemical lines.

2️. Double Orifice Air Release Valve

Has two orifices:
- One for releasing small air pockets during operation
- One for releasing large volumes of air during pipeline filling
Provides better protection against air locking.
Ideal for long pipeline systems.

3️. Combination Air Release Valve

Combines air release and vacuum breaker functions.
Releases air and allows air intake during pipeline draining.
Prevents pipe collapse due to vacuum conditions.

4️. Automatic Float Type Air Release Valve

Operates automatically using a float mechanism.
Opens when air accumulates and closes when liquid reaches the valve.
Most common type in CPVC systems.

5️. Threaded CPVC Air Release Valve

Comes with BSP/NPT threaded connections.
Easy to install and remove.
Suitable for small diameter piping systems.

Applications of CPVC Air Release Valve

Process Industry

High Purity Applications

Electronic Industry

Electrical Industry

Semi-conductors Industry

Pharmaceutical Industry

Solar power panels

Sugar Industry

Paper & Pulp Industry

Nuclear Power Industry

Automotive Industry

DI water plants

Why Choose Petron Thermoplast?

At Petron Thermoplast, we understand the importance of quality fittings for your projects. That’s why we offer a comprehensive selection of CPVC Air Release Valves in various sizes from reputable brands. Choosing a CPVC Air Release Valve from Petron Thermoplast supplier can have several advantages over traditional fittings. Here are some reasons why:

Space Efficiency

CPVC Air Release Valves take up less space in tight environments, as they neatly connect different pipe sizes. This can be particularly beneficial in commercial areas where space is limited.

Fluid Flow Optimization

By allowing the smooth transition from a larger pipe to a smaller one, the CPVC Air Release Valve minimizes flow turbulence, making the system more efficient.

Cost-Effective Solutions

Using a CPVC Air Release Valve can often save you money in materials and labor, as you can eliminate the need for multiple fittings.

Versatility

CPVC Air Release Valve can adapt to various piping configurations, making it suitable for a variety of applications, from irrigation to industrial use.