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“ purposd ofBack Check Selector Valve ”

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What is the valve on the back of a 4041/4040XP closer used for?
The valve on the back of a 4041/4040XP closer is a "Back Check Selector Valve" that needs to be turned in on "Parallel Arm" mount applications ONLY. If a 4041/4040XP closer mounted "Top Jamb", or "...
BACKCHECK SELECTOR VALVE
Valve used to provide proper backcheck location for 4040XP and 4050A parallel arm mounting
How do you adjust a door closer?
How to:  What are the steps to adjust a door closer?Facts: All LCN and FALCON door closers will have 3 regulating valves and a spring adjustment.  All closers with a "Delay" feature ...
How are the solenoid air valves in the 7900 series control boxes marked?
The part number for the solenoid air valve in the 7900 Series control boxes are: 7901/ES7901 - part# 941 - marked A 7902(S)/ES7902(S) - part# 942 - (2 valves) marked A and B 7949/ES7949 - part...
Is there adjustment limits on the regulation valves of LCN manual closers?
The regulation valves are designed to adjust the flow the hydraulic fluid in the closer which regulates the door closing speed through various phases of the closing cycle. The regulation valves h...