![](https://www.fluidcontrol.com.au/wp-content/uploads/2015/10/apco-vacuum-reliefair-inlet-valves-avr.jpg)
Design Features:
Vacuum Relief/Air Inlet Valves are normally closed valves and when the System Pressure becomes Negative -IT OPENS IMMEDIATELY- allowing air into the system to prevent a vacuum forming. When system pressure returns to positive, the Vacuum Relief/Air Inlet Valve closes air tight. Standard Vacuum Relief/Air Inlet Valves are designed to open with a minimal, 1/4 PSI, pressure differential across the orifice. Higher or lower relief settings are available to suit the application. Rated 125# and 250# class.
Vacuum Relief/Air Inlet Valves (AVR) Specifications
SIZE RANGE:
3 – 36″