Watts Boiler Pressure Relief Valve, 6,340,000 BtuH, 150 psi - LF174A-150-1-1/4" Nominal Size-18 " X 1.5" or for fuels blending

or for fuels blending

Cross Reference: Gem EM680

The ring has a trapezoidal shape

The motor's shaft also turns a cooling fan to help pull air through the motor

The distance between the holes is 7-1/2 inches from side to side and 5-1/4 inches from the top row to the bottom

Watts Boiler Pressure Relief Valve, 6,340,000 BtuH, 150 psi - LF174A-150-1-1/4" Nominal Size-18 " X 1.5" or for fuels blendingBoiler Pressure Relief Valve; Inlet Type: FNPT; Outlet Type: FNPT; Inlet Size: 1 1 4 in; Outlet Size: 1 1 4 in; Body Height: 8 3 8 in; BtuH: 6,340,000; Factory Set Pressure: 150 psi; Max. Temp.: 250 Degrees F; Auto Re Seating: No; Body Material: Lead Free Copper Silicon Alloy; Spring Material: Stainless Steel; Body Width: 4 3 4 in; Standards: ASME, MIL V 18634B