Lockout valve. It is easily identifiable by its yellow body and red handle for ON/OFF control. Full-size exhaust ports equal to or larger than the supply provide rapid exhaust of downstream air and are threaded for silencers or remote exhaust lines. Its design allows the valve to be locked only in the OFF (closed) position. Features include fluorocarbon slipper seals for easy shifting, even after long periods of inactivity.
