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Which valve is back check valve
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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 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 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 the minimum and maximum PSI applied to a 4800 operator?
Resolution:
The pneumatic operators are designed to function with an input air pressure to the 7901/7902 Series control box of 80 (min) 100 (max) PSI, and an output pressure of 60 to 80 PSI to the pneumatic (2...:
What is the difference between the 4040, 4010, 4020, and 4110 series closers?
Resolution:
4040XP Series (4040 DEL) is a universal closer. *(see note) Non Handed closer. Can be mounted on a RH or LH door. 4041XP - Adjustable size 1 to 6. Can mount push side or pull side of the doo...:
How can you tell the hand of a door closer?
Resolution:
First you need to determine if the closer is handed. A handed door closer will only have a single shaft on one side of the closer for the arm to attach to. If the closer is handed...:
How do you slow down the closing speed of the 4600 series operator?
Resolution:
The hydraulic closer underneath the control box has 3 regulating valves (like any 4040 series hydraulic closer). Main Speed - adjust closing speed from 90° open down to 10°. Latch Speed - adju...:
Is the 4111 closer handed?
Resolution:
The 4110 closer is handed, and will have an "RH" and "LH" on the casting next to the closer shaft. The regulating valves are going to be on the same side as the hand of the closer.:
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...: