CleaverBrooks CFC-500 Operation, Service And Parts Manual page 256

V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves
Fig. 1: V4730C/V8730C Gas Valves, 1/2 in. (13 mm) and 3/4 in. (19 mm) size, dimensions in in. (mm).
Fig. 2: V4730C/V8730C Gas Valves, 1 in. (25 mm) size, dimensions in in. (mm).
4 EN2R-9074 0612R1-NE