AJAX Boiler, Model No. SRN-40, 40 HP Water Tube Steam Boiler, 150 psi. Includes the following: Boiler Blow down valves-One Quick Opening and one Slow Opening, Surface Blow down Valve (Needle Valve), Boiler Feedwater Check Valve. See below equipment schedule minimum specifications: 150 psi design 1,750,000 BTU input 1,400,000 BTU output 40 HP boiler rated horsepower with 212 degree F entering feed water temperature 4300 lbs shipping weight dry