Inline Check Valves


HVAC systems require many kinds of valves and pumps to keep
the system running properly. Check valves are one of the most common valves
that may malfunction in these heating and cooling units and other appliances.
The check valve is responsible for keeping the HVAC system balanced properly.
The “door” of this valve is opened when the system first begins running, and it
closes when the unit shuts off. When the HVAC is on and running, these systems
allow the air to flow through providing you with the heating or air
conditioning you need to keep you feeling comfortable indoors. There are many
different kind of check valves that can be found in other appliances and
systems. Two examples of these check valves include an inline check valve and a
lift-check valve.


The inline check valve and lift-check valve are very similar
in that they both move to create a balance of the pressure in these systems.
When the upstream pressure is on the upstream side of the valve, the in line
check valve will lift and overcome the pressure, which is called the “cracking
pressure.” In the case of the door metaphor, the inline check valve is like an
open door. The door closes when the cracking pressure is reduced to prevent


These inline check valves are an essential part of the HVAC
system and can be expected to wear out over time. To properly keep them
maintained, it’s recommended to hire an HVAC specialist to come in and check the
efficiency of all the in line check vales to ensure that they are in proper
working order. The “door” section of the valve is continually under a great
deal of pressure that, if not properly maintained, will leave you with an
inefficient system and a high utility bill. Because of the nature of these
valves, they cannot be sealed using tape or other kinds of sealers and will
often require a full replacement of the faulty and leaky in line check valve.


To keep your HVAC system running properly, stay on top of
maintenance and make the proper repairs as soon as necessary. Hiring an HVAC
specialist is the first step in keeping your system up to date. These workers
should check the system at least once a year to check all valves and ensure
that the system is fully operational with no leaks. A leaky HVAC system will
only increase your utility bills and leave you with a faulty heating and
cooling system.