Under certain conditions, the original regulator main exhaust valve, 310-065, used in the REX® regulator assembly, 505-278 could be susceptible to low exhaust flow oscillations, or “Honking”. Several variables have been found to cause this. A solution to this issue has been found by making a slight modification to the shape of the valves. The new part number is 510-777 and the parts are easily distinguished by the change in color from orange/red to medium GRAY. No change to associated procedures for maintenance of the valve are necessary.
Note: This valve is not for use on the EXO® 26 or EXO® BR Full Face Masks. The EXO® Masks will continue to use 310-065 exhaust valve.
2011 U.S. Retail Price: $15.00
Please contact your local KMDSI dealer or e-mail KMDSI at [email protected] for more information.