Liquid drainers go by many names. They are also known as
Compressed air drains
Condensate drainers
Air traps
Water traps
Dump valves
Float traps
Compressed air traps
Provision for automatic drainage is sometimes not included in the original
system. It is possible to discharge liquid manually through a valve that
has been cracked open. However, an open drain also continuously wastes
air or gas.
Liquid drainers installed at appropriate points will remove liquid
continuously and automatically without wasting air or gas. In addition
to drainage of the system, liquid drainers should provide
Trouble-free operation with minimal need for adjustment or maintenance
Reliable operation even in the presence of dirt, grit and oil