FM-Approved Check Valves
Check valves are a means of preventing a reverse flow and are to be installed in the gas line where air ix mixed with fuel gas prior to combustion, as with gas/air brazing torches, jewelery torches, and many types of industrial burners. Check valves should also be fitted in the corresponding air line where there is a possibility of the pressure falling below that of the gas, a condition frequently encountered when starting up. Larger sizes of check valves can be fitted on the outlet side of the gas meter to give general protection, and smaller sizes should be fitted on the inlet pipe to any appliance where gas and air are mixed.
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Model 590 Rollchek
Description : The FM Approved Series 590 is designed to prevent reverse flow of gas or air in a pipeline and provdes a positive seal with very low differential pressure.
| Threaded Size |
: 2", 3" |
| Pressure |
: Up to 100 PSIG on all sizes |
| Flanged Sizes |
:3", 4", 6" |
View the 590 Rollchek's FM Approval
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 Download
Technical Manual |
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