Air Check Valves

Air Check Valves feature a spring-loaded design and sit on the outlet side of the meter. In most Liquid Controls meter systems, installers pair an air eliminator with either an Air Check Valve or a differential valve. During installation, technicians pipe the air eliminator and the valve together so they operate as one integrated unit.

In normal operation, the Air Check Valve stays closed. So, when the pump starts and pushes product into the system, the flow pressure overcomes the spring force and opens the valve. However, when the air eliminator expels air, the system routes that air to the back of the valve spring. So, this extra pressure, combined with the spring’s strength, keeps the valve closed until the system removes all air.

These valves are widely used in:

• Fuel delivery systems – ensuring accurate measurement of petroleum products

• Chemical processing – preventing contamination and maintaining product integrity

• Water and wastewater treatment – supporting consistent, air-free flow

• Food and beverage production – maintaining quality and accuracy in liquid handling

High-quality Air Check Valves deliver:

• Improved accuracy – by removing air pockets before measurement

• Enhanced system protection – reducing strain on pumps and meters

• Operational efficiency – keeping flow steady and predictable

• Lower maintenance costs – avoiding damage caused by trapped air

• Air actuated check valves.
• For use with M7, M0, M15, M25, as well as M30 Meters.
• Designed to stop the flow whenever air or vapour is present thereby assuring accurate measurement.
• Available in aluminium or stainless steel 2″ or aluminium 3″ and 4″.
• Rated to 150psi.