Air Release Valve Manufacturer in India

The air release valve helps in releasing the air trapped inside the pressured pipes automatically and allows entry of air into the pipes when negative pressure is created. It is used to avoid the problem of air locking, flow restriction, and vacuum formation in the system. Specialty Valve produces Air Release Valve for water, wastewater, irrigation, and industrial pipeline systems. Selecting an Air Release Valve Manufacturer in India involves several factors, including pressure, temperature, material, air releasing capability, and application conditions.

How Does an Air Release Valve Work?

If there is air present at the high point in the pipe line, then due to this, the fluid level in the valve falls and as a result, the float opens the air vent.

Kinetic air valves may be used when the pipe line is being filled or drained as well as for discharging a large volume of air and admitting air.

Air Release Valve Types:

The current product range includes:

• Single Orifice Air Valve: Releases smaller amounts of accumulated air during normal pipeline operation.

• Double Orifice Air Release Valve: Provides continuous air release along with larger air discharge and admission.

• Double Orifice Kinetic Air Valve: Designed for high-volume air discharge during filling and air admission during draining.

Air Release Valve Construction:

An air release valve generally consists of:

• Body: Cast iron, ductile iron, carbon steel, or stainless steel, depending on application.

• Float: SS304 or SS316 for automatic air venting system.

• Orifice: Manages air evacuation and intake.

• Seat: Creates sealing effect once valve closes.

• Sealing Material: NBR, EPDM, or Viton, depending on fluid and temperature conditions.

• Bonnet or Cover: Houses internal working parts.

The float operates automatically through changes in liquid level and pipeline pressure, so no external power is normally required.

Technical Specifications and Material Details:

Additional material and construction options include:

• Carbon Steel: ASTM A216 WCB, WCC

• Low-Temperature Steel: ASTM A352 LCB, LCC

• Stainless Steel: CF8, CF8M, SS304, SS316

• Coating: Fusion Bonded Epoxy

• Thread Standards: NPT, BSP

• Temperature: Approximately -10°C to +120°C, depending on material and configuration

Applicable standards can include AWWA C512, ASME B16.34, ISO 5208, API 598 and EN 12266-1. Flanged connections can follow EN 1092 or ASME B16.5 according to the specified configuration.

Quality Control and Testing:

Quality control can include:

• Dimensional inspection

• Material verification

• Body pressure testing

• Seat leakage testing

• Float-operation checks

• Functional testing

• Coating inspection where applicable

• Material certification where specified

Testing can follow applicable API 598, EN 12266-1 and ISO 5208 requirements.

Key Benefits:

• Removes trapped air automatically

• Helps prevent air-lock formation

• Provides vacuum protection during draining

• Supports stable pipeline flow

• Helps reduce pressure fluctuations

• Operates without external power

• Available in different pressure and material configurations

• Supports reliable pipeline operation

Industries and Applications:

Air release valve is used in:

• Water Supply: Transmission and distribution pipelines

• Wastewater: Rising mains and sewage networks

• Irrigation: Agricultural and water-transfer pipelines

• Power Generation: Cooling-water and utility systems

• Oil and Gas: Compatible pipeline applications

• Desalination: Water transmission systems

• Mining: Water-transfer infrastructure

• Marine: Seawater and utility pipelines

• Chemical Processing: Compatible fluid-handling systems

• Fire Protection: Pressurized water networks

What Should You Consider When Choosing an Air Release Valve? 

Selection should consider pipeline diameter, operating pressure, air-release capacity, vacuum conditions, fluid characteristics, temperature, body material, float material, seal compatibility, end connection and installation location. The valve type should match whether the pipeline requires continuous small-volume air release, high-capacity kinetic air discharge or both.