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“
where is Back Check Valve
”
RELATED FAQS
Question
Answer
What is the valve on the back of a 4041/4040XP closer used for?
Resolution:
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. :
How do you adjust a door closer?
Resolution:
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 "Del...:
How are the solenoid air valves in the 7900 series control boxes marked?
Resolution:
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?
Resolution:
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 valv...:
BACKCHECK SELECTOR VALVE
Resolution:
Valve used to provide proper backcheck location for 4040XP and 4050A parallel arm mounting:
What is the delay time adjustment on a Delayed Action closers?
Resolution:
Regular LCN closers have "3" regulating valves for General Speed, Latch Speed, and Backcheck. If the LCN closer has "4" regulating valves, then the closer has the Delayed Action feature. De...:
What does AVB mean in a closer and which closers are available with this option?
Resolution:
AVB stands for Advanced Variable Backcheck. It is a cylinder option when ordering, that allows backcheck to start at about 45 degrees instead of the normal 75 degrees. 4110, 4210...:
What is a LCN 1040 or 1050 closer?
Resolution:
The 1040 and 1050 are obsolete closers made in the 50's, 60's, and 70's. The 1260 or 1460 will work as replacements, but they are not direct replacement.:
What size Allen wrench is used for Closer adjustment?
Resolution:
LCN does not supply Allen wrenches. The size allen wrenches that LCN uses, are standard sizes that every installer will have in their tool kit. 3/32" Allen wrench for adjusting&...:
What would cause a door closer to slam?
Resolution:
There are a few things that can cause a closer to slam. The closer could be adjusted incorrectly. Turn all regulating screws clockwise until they stop. Then open each valve 1 and 1/2 turns. If t...: