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Non-Return Valves

 

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Cast Iron Non-Return Valves

250 lb SP Cast Iron Non-Return Valves

(4)
Lunkenheimer Non-Return Valves cut out a boiler automatically when inside pressure drops suddenly or when heat is withdrawn.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 Surfaces
Regrindable. Seat disc and all other parts renewable.

Installation Note
Connection should be made directly to boiler outlet nozzle. Intervening pipe ...
Cast Steel Class 300 Non-Return Valves

Class 300 Cast Steel Non-Return Valves

(4)
Lunkenheimer Non-Return Valves cut out a boiler automatically when inside pressure drops suddenly or when heat is withdrawn.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-check 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
A2I6 WCB, Cast Steel


Trim
A216 WCB. 410 St. St.


Seating Surfaces
A216 WCB 13CR with facing


Installation Note
Connection should be made directly to boiler outlet nozzle. Intervening pipe should be kept as short as possible. Normally shipped with external ...