Yale 3301 DL Delayed Action Slim Cover Door Closer
Click Here
Please let us know if there is anything else we can help with.
From the 3301 catalog:
Series 3301 and 3501 door closers are designed to comply with requirements of the Americans with Disabilities Act (A.D.A.) and ANSI standard A117.1. All series 3301/3501 are ANSI/BHMA A156.4 Grade 1 certified. All Yale® series 3301/3501 closers with non-hold open arms are listed by Underwriters Laboratories for labeled fire doors. This includes compliance to UL10C for 3-hour assemblies. The product is manufactured in an ISO 9001 facility.
Step 11 on page 4 here:
Download File
Is where the spring adjustment is made (where you can increase and reduce the sping power) but keep in mind - less spring power equals less closing force - so you will have to fing a happy medium for this control.
Is there a follow up question that we can perhaps attempt to answer? We take pride in our technical expertise, as we know it separates us from our competition, so don't hesitate to ask.
Please reply to this email or contact our sales department here:
if we can assist you by answering further questions or with entering this order and please let us know if there is anything else we can help with.