The air release valve continuously vents pocketed air under pressure, while the combination air valve also provides large-orifice air exhaust during pipeline filling and rapid air intake during system draining.
AVM · Pipeline Air Management
AVM · Pipeline Air Management
AVM Air Release and Vacuum Relief Valves
AVM Air Release and Vacuum Relief Valves
AVM Air Release and Vacuum Relief Valves
Expelling air during line filling, releasing air pockets under operating pressure, and enabling vacuum breaking during pipeline draining: three essential functions precisely engineered to match your pipeline's profile and operating conditions.
Expelling air during line filling, releasing air pockets under operating pressure, and enabling vacuum breaking during pipeline draining: three essential functions precisely engineered to match your pipeline's profile and operating conditions.
Expelling air during line filling, releasing air pockets under operating pressure, and enabling vacuum breaking during pipeline draining: three essential functions precisely engineered to match your pipeline's profile and operating conditions.
AVM · Explore Construction01 / 03
Combination Air Release Valve
Automatic air release, air intake, and vacuum relief.
Three functions
Three functions
Filling, pressure service, draining.
Filling, pressure service, draining.
DN50–400
DN50–400
Documented combined portfolio.
Documented combined portfolio.
Water and Wastewater
Water and Wastewater
Engineered configurations tailored to specific media.
Engineered configurations tailored to specific media.
Understanding the Technology
Understanding the Technology
The three functions of a combination air release valve.
The three functions of a combination air release valve.
The three functions of a combination air release valve.
Filling and Intake
During filling, the large orifice exhausts high volumes of air at low differential pressure. During draining or negative pressure conditions, it allows air intake to accommodate water withdrawal.
Pressurized purge
During pressurized operation, the small orifice continuously exhausts accumulated air. This automatic air release function operates independently from high-capacity venting.
Specify Application/Duty in Quotation
The English terms relevant for quotation purposes are air release valve, air/vacuum valve, and combination air valve. In this application, these refer to air venting within a water distribution system, rather than a steam condensate trap.
AVM drawing for compact air release valve DN50 PN16 • Example shown with ANSI Class 125 drilling. Specifications do not apply to all configurations.
AVM drawing for compact air release valve DN50 PN16 • Example shown with ANSI Class 125 drilling. Specifications do not apply to all configurations.
Technical Benchmarks
Technical Benchmarks
Select the appropriate construction for your process media.
Select the appropriate construction for your process media.
Select the appropriate construction for your process media.
| Design Point | Documented Information |
|---|---|
| Combination Air and Vacuum Release Valve for Water | Three air management functions. Available from DN50 to DN400 within the documented range. |
| Single-Orifice Air Release Valve | A pressurized air release function. DN25 threaded version referenced in the brochure, distinct from a combination air release valve. |
| Wastewater Service Model | Elongated chamber engineered to isolate media from the seat, featuring an optimized small orifice. Maintenance schedule to be determined based on effluent characteristics. |
| Body and Float | Ductile iron, welded steel, or stainless steel depending on the configuration. Features a polyethylene float and stainless steel guide mechanism as standard in the documented construction. |
| Pressure | Product line rated from PN10 to PN64 depending on the configuration. Availability for each diameter–pressure combination must be confirmed with our technical team. |
| Anti-Water Hammer Option | Device designed to restrict rapid air release. Must be coordinated with the network's hydraulic operation. |
| Normative Reference | AWWA C512 compliance confirmed via AVM declaration dated June 1, 2026. Applicable requirements to be verified for the offered part number. |
Pipeline diameter alone is not sufficient to size an air release valve. Inflow and exhaust curves, differential pressures, and filling or draining scenarios are required.
Pipeline diameter alone is not sufficient to size an air release valve. Inflow and exhaust curves, differential pressures, and filling or draining scenarios are required.
Additional Configurations
Additional Configurations
Clean water or wastewater: the chamber design adapts.
Clean water or wastewater: the chamber design adapts.
Clean water or wastewater: the chamber design adapts.
Water Distribution Networks
Water Distribution Networks
Water Distribution Networks
Determine the required airflow rates, operating pressure, and vacuum conditions.
Determine the required airflow rates, operating pressure, and vacuum conditions.
Wastewater
Wastewater
Wastewater
Account for solids, scaling, cleaning accessibility, and the protection of sealing components.
Account for solids, scaling, cleaning accessibility, and the protection of sealing components.
Prepare Your Request
Prepare Your Request
The insights that drive your product selection forward.
The insights that drive your product selection forward.
The insights that drive your product selection forward.
Pipeline Profile
Pipeline Profile
Pipeline Profile
Provide the high points, slopes, lengths, and isolation valve locations.
Provide the high points, slopes, lengths, and isolation valve locations.
Operating Scenarios
Operating Scenarios
Operating Scenarios
Specify filling and emptying flow rates, pump shut-off points, and allowable working pressures.
Specify filling and emptying flow rates, pump shut-off points, and allowable working pressures.
Installation and Maintenance
Installation and Maintenance
Installation and Maintenance
Ensure proper isolation, discharge evacuation, manhole ventilation, and maintenance access.
Ensure proper isolation, discharge evacuation, manhole ventilation, and maintenance access.
Technical Inquiries
Technical Inquiries
Your Questions About Air Release and Air Vacuum Valves.
Your Questions About Air Release and Air Vacuum Valves.
Your Questions About Air Release and Air Vacuum Valves.
AVM offers an extended body design engineered specifically for wastewater applications. Solid content, clogging risks, and maintenance requirements are key factors in our valve selection process.
This option controls air release. Sizing is determined using the pipeline profile and operational scenarios, along with system transient analysis.
Provide the pipeline profile, pipe diameters, filling and draining flow rates, operating pressures, and media. Manufacturer performance curves are then evaluated to verify intake and exhaust capacities.
Related Solutions
Related Solutions
Continue your selection.
Continue your selection.
Continue your selection.
Check Valves
Check Valves
Check Valves
Shut-off technology is just as critical as valve diameter. Compare AVM designs to select a reliable solution tailored to your media, flow velocities, and pump shutdown conditions.
Shut-off technology is just as critical as valve diameter. Compare AVM designs to select a reliable solution tailored to your media, flow velocities, and pump shutdown conditions.
Explore the Solution →
Explore the Solution →
Water and Wastewater
Water and Wastewater
Water and Wastewater
The operating demands of municipal networks and treatment plants.
The operating demands of municipal networks and treatment plants.
Explore the Solution →
Explore the Solution →
AVM Valves
AVM Valves
AVM Valves
Equipment designed for pipeline isolation, pumping support, and waterworks control. VAMECA delivers the technical expertise to help you select the right AVM solutions for your projects across Quebec and Canada.
Equipment designed for pipeline isolation, pumping support, and waterworks control. VAMECA delivers the technical expertise to help you select the right AVM solutions for your projects across Quebec and Canada.
Explore the Solution →
Explore the Solution →
AVM expertise. Your dedicated VAMECA partner.
AVM expertise. Your dedicated VAMECA partner.
AVM expertise. Your dedicated VAMECA partner.
Technology selection, system compatibility, and technical submittals: let's move forward using your quote, drawings, or existing equipment specs.
Technology selection, system compatibility, and technical submittals: let's move forward using your quote, drawings, or existing equipment specs.