1122 Butterfly Valves feature a knurled knob locking device that prevents accidental shifting of valve setting. It is easily released, then relocked, if a new setting is desired.
To discourage unauthorized tampering with the valve setting, the knob can be replaced with a socket head screw as the locking device. The socket head screw is conveniently supplied in the side of the knob.
Valves can be used on gas as well as air.
Maximum pressure is 15 psig, maximum temperature 400 F.
For fluid temperatures up to 700 F* an 1122- -H “Hi-Temp.” model is available.