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Class 300 Cast Steel Non-Return Valves

 
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Lunkenheimer Non-Return Valves cut out a boiler automatically when inside pressure drops suddenly or when heat is withdrawn.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 spring positioned for vertical installation. The external spring should be reversed when the valve is installed with the stem horizontal. Complete Information for installation and operation is attached to valve when shipped.


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Item #

Item Name

Size

Dim. B

Dim. D

Dim. E

Dim. F

Dim. H

Weight (Angle)
1409-3 3" Class 300 Cast Steel Non-Return Valve 3 in 12 1/2 in 6 1/4 in 19 in 18 7/8 in 10 in 136 lb
1409-4 4" Class 300 Cast Steel Non-Return Valve 4 in 14 in 7 in 22 5/16 in 22 1/16 in 14 in 226 lb
1409-6 6" Class 300 Cast Steel Non-Return Valve 6 in 17 1/2 in 8 3/4 in 27 3/8 in 27 1/4 in 18 in 413 lb
1409-8 8" Class 300 Cast Steel Non-Return Valve 8 in 21 in 10 1/2 in 35 1/2 in 34 15/16 in 22 in 782 lb
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