1) Firefighting equipment
Found on
https://www.crosswordclues.com/clue/check-valve
A check valve, clack valve, non-return valve or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide v...
Found on
http://en.wikipedia.org/wiki/Check_valve
or clack valve, from the noise it makes. A non-return valve where the feedwater enters the boiler drum. They are usually mounted halfway along the boiler drum, or else as a top feed, but away from the firebox, so as to avoid stressing it with the shock of cold water.
Found on
http://en.wikipedia.org/wiki/Glossary_of_boiler_terms
see backflow preventer
Found on
http://en.wikipedia.org/wiki/Glossary_of_firefighting_equipment
Means a plumbing fitting designed to allow water flow in one direction only.
Found on
http://www.encyclo.co.uk/local/20844
a valve that permits flow in one direction only. if the gas or liquid starts to reverse, the valve automatically closes, preventing reverse movement. Commonly referred to as a one-way valve.
Found on
http://www.encyclo.co.uk/visitor-contributions.php
a spring-loaded ball or piston valve that allows flow only in one direction.
Found on
http://www.horizonsunlimited.com/gear-up/motorcycle-terms-and-glossary
A valve that permits passage through a pipe in only one direction.
Found on
https://operations.fs.cornell.edu/info/ir_glossary.cfm
A valve that permits the passage of a liquid or gas in one direction only. It stops, or checks, reverse flow.
Found on
https://www.encyclo.co.uk/local/20687
A plumbing fitting designed to allow water flow in one direction only.
Found on
https://www.encyclo.co.uk/local/20822
A safety valve which allows fuel, air or a vacuum to flow in only one direction.
Found on
https://www.encyclo.co.uk/local/22335
a type of backflow preventer installed on a pipe so that water is allowed to only flow in one direction.
Found on
https://www.encyclo.co.uk/local/22545
A one-way valve, commonly used on the gas outlet of a CO2 regulator to prevent beer from flowing back into the regulator and damaging it.
Found on
https://www.encyclo.co.uk/local/22622
a valve permitting liquids or gases to flow in one direction only.
Found on
https://www.infoplease.com/dictionary/check-valve
[Ammonia Refrigeration] a valve allowing flow in one direction only.
Found on
https://www.osha.gov/SLTC/etools/ammonia_refrigeration/glossary.html
No exact match found.
