Non Return Boiler Angle Valve, Fig 1409
Lunkenheimer Non Return Angle Valve, Outside screw and yoke
Fig 1409
Lunkenheimer Fig 1409 non-return valves cut out a boiler automatically when inside pressure drops suddenly or when heat is withdrawn.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 A216 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.
Alternatives
Fig 1408 Cast Iron 250 lb SP
Fig 1409
