Lunkenheimer Non-Return Valves cut out a boiler automatically when inside pressure drops suddenly or when heat is withdrawn. External spring is reversed and valve acts as a spring-loaded stop-chock valve. Spring may be adjusted from the outside while valve is under pressure to compensate for excessive steam pulsations. Valves may be installed in either vertical or horizontal position.
Bodies and Bonnets Cast Iron. ASTM A-126 Trim Seat, disc, back seat bushing and yoke bushing is S1 steam bronze, ASTM B-61.
Seating SurfacesRegrindable. Seat disc and all other parts renewable. Installation Note Connection should be made directly to boiler outlet nozzle. Intervening pipe ...