Air Release Valve Manufacturer in India

Air release valves automatically discharge accumulated air pockets from pressurized liquid pipelines. Removing accumulated air helps maintain flow capacity, reduce flow disturbances and limit operating problems caused by trapped air. Depending on the pipeline duty, the required solution may be an air release valve, an air/vacuum valve or a combination valve. Speciality Valve offers configurations selected for the operating pressure, pipeline profile, air-flow requirement and service medium.

Types of Air Valves:

Air Release Valve: Automatically releases small quantities of accumulated air while the pipeline remains pressurized.
Air/Vacuum Valve: Discharges large volumes of air during pipeline filling and admits air during draining or vacuum conditions.
Combination Air Valve: Combines small-volume air release during pressurized operation with large-volume air discharge and admission during pipeline filling and draining.

Air Release Valve Components:

An air release valve generally consists of:

Body: Cast iron, ductile iron, carbon steel, or stainless steel, depending on application.
Float: Operates the venting mechanism in response to the liquid level; SS304 or SS316 may be used depending on the valve design.
Orifice: Provides the controlled passage for accumulated air to be discharged.
Seat: Provides sealing when the venting orifice closes.
Sealing Material: NBR, EPDM or FKM, depending on the fluid and temperature conditions.
Bonnet or Cover: Houses internal working parts.

The float mechanism operates automatically in response to changing liquid and air conditions inside the valve, without requiring external power.

Air Valve Sizing and Function Selection:

The pipeline profile determines the required air function. Pipeline diameter, profile, operating pressure, filling and draining conditions, required air-flow capacity and vacuum conditions help determine whether the line requires continuous small-volume air release, large-volume air admission/discharge or both.

Fluid temperature and material compatibility should be considered when selecting the valve body, float and sealing materials.

Air Release Valve Specifications:

Parameter	Technical Details
Size	Configuration-dependent
Inch Size	Configuration-dependent
Pressure Rating	Configuration-dependent
ASME Class	Configuration-dependent
Body Materials	Cast iron, ductile iron, carbon steel, stainless steel
Float Material	SS304, SS316
Seal Materials	NBR, EPDM, FKM
End Connections	Flanged, threaded
Operation	Automatic float-actuated
Body Materials / Grades	Cast iron, ductile iron, ASTM A216 WCB/WCC, ASTM A352 LCB/LCC, CF8/CF8M or specified stainless-steel grades, depending on design
Coating	Fusion-bonded epoxy where applicable
Thread Connections	NPT or BSP where applicable
Temperature Range	Configuration and material-dependent

Air Valve Standards and Testing:

Applicable standards can include:

AWWA C512: Air-release, air/vacuum and combination air valves for waterworks service.
ASME B16.34: Applicable valve design, pressure-temperature ratings, materials, testing and marking requirements.
ISO 5208: Pressure testing requirements where applicable.
API 598: Valve inspection and pressure testing where applicable.
EN 12266-1: Pressure testing requirements where applicable.

Flanged end connections may be supplied to the applicable EN 1092 or ASME B16.5 requirements, depending on the selected configuration.

The float and orifice assembly should be checked for:

Dimensional inspection
Material verification
Body pressure testing
Seat leakage testing
Float and functional operation checks
Coating inspection where applicable
Material certification where specified

Air Valve Applications:

Water Transmission Pipelines: Releasing accumulated air at suitable high points during pressurized operation.
Pipeline Filling and Draining: Large-volume air discharge or admission using the appropriate air/vacuum or combination valve.
Pump Discharge Lines: Air management at suitable locations downstream of pumping equipment.
Desalination Water Systems: Air release and vacuum protection in compatible water transmission piping.
Mining Water-Transfer Systems: Air management in long or changing-elevation water pipelines.
Marine and Seawater Systems: Air management in compatible seawater or utility-water piping where valve materials are suitable.
Wastewater Transmission Lines: Air-management duties in suitable pressurized wastewater pipelines where the valve design is compatible with the service.
Fire-Water Networks: Air-management duties at suitable locations where the approved system design permits an air valve.

Share the pipeline profile, line size, operating pressure and required air-discharge or admission capacity with Speciality Valve for air valve function and configuration review.