• Ductile Iron Body
• Stainless Steel Trim and Float
• Easily serviced without removal from pipeline
• Working pressures to 800 psi
• Engineered for drip tight seal at low pressures
Cla-Val Series 34 Air Release Valves are designed to vent entrained air
that collects at high points in a pipeline. This valve continuously
eliminates air from a system by releasing small quantities of air before
large air pockets can occur. In many installations, continuing
accumulations of air in the pipeline (lacking air release valves); cause
flow capacity to slowly decrease; power consumption slowly increases;
unnoticeable at first, until flow drops dramatically, even stopping due to
air blocks in the piping. Another problem resulting from excessive air
accumulation is unexplained pipeline rupture. These ruptures are
passed off as the result of ground settling or defective pipe, Where as
in reality its large air pockets that greatly increase pressure surges
(normally occurring) when flow stops and starts causing the rupture.
During normal pipeline operation, air accumulation at the high point will
displace the liquid within the air valve and lower the water level in relation
to the float. As level of the liquid lowers, where the float is no longer
buoyant, the float drops and opens the valve orifice seat and permitting
accumulated air to be exhausted to atmosphere. After air is released, the
liquid level in the air valve rises and closes the valve orifice seat. This
cycle automatically repeats as air accumulates inside the air release valve,
thereby preventing the formation of air pockets.