D-040.IOM.ENG0
2
Installation, Operation & Maintenance
COMBINATION AIR VALVE
MODEL D-040
The following is a step by step narrated description of the A.R.I. D-040 Combination Air Valve installation,
operation and maintenance processes.
The D-040 series Combination Air Valve has the features of both an air release valve and an air & vacuum
valve. The air release component is designed to automatically release small pockets of air to the
atmosphere as they accumulate along a pipeline or piping system when it is full and operating under
pressure. Please consult A.R.I. for the pressure and temperature framework of this model specifications
table and for other products designed for hazardous liquids systems.
