The Johnson Controls P47GA-9C STEAM Pressure Control; 4-WIRE 2-CIR 0/150#; W/STEAM Trap
P47 steam pressure controls are for high limit or operating control applications. A typical use is a limit control on steam heating systems. Models that close on a pressure increase are used on steam unit heaters to avoid blower operation when steam pressure is below the point required for adequate heating.The P47 can be used with steam, water, air, or noncombustible gases which do not harm iron or copper.