|Air Valve Recommendations|
Freely dissolved air exists in all fluid transmission systems.
The principal sources for this air are:
The lack of control over the air present in a fluid system can result in damage:
Control of Air in Wastewater Systems Using A.R.I. Air Valves
There are three main types of air valves installed in wastewater supply systems: air & vacuum, automatic air release and combination (double) valves.
Air & Vacuum valves discharge large quantities of air from non-pressurized pipes and are used mainly when filling a line. Air & vacuum valves also make it possible to admit large quantities of air when lines are drained and when the pressure drops suddenly. Air & vacuum valves are also known as: kinetic valves; large orifice air valves, vacuum breakers, low-pressure air valves and air-relief valves.
Automatic air release valves continuously release relatively small quantities of air from a pressurized line. The automatic air release valve is also known as a small orifice air valve and as a pressure air valve.
Combination air valves fulfill the tasks required of both types of valve – air & vacuum and automatic. In other words – they discharge or intake large volumes of air when filling or emptying a system and continuously release small volumes air when the line is pressurized.
Combination air valves are also known as double orifice air valves.