[PDF] Untitled - Quality Engineered Products Co.
For use on heavy doors or doors where high frequency is expected such as ... stores, public buildings and corridor entrance doors to offices .... FUNCTIONS - Functions are field selectable except for the .... Advanced Variable Backcheck ( AVB) optional ... The D-4550/D-4551 Series Door Closers are designed to have.
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qepco's website is qepco.biz