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FAQs

Are the letters engraved on the D271 indicator deadbolt?

Resolution: The indicator sign for the B571/D271 is an engraved aluminum plate. :

What is the leading edge of a door with respect to door bottoms ?

Resolution: With respect to mortised automatic door bottoms (ADB) , door will sometimes be specified with a clean leading edge. This is specified for aesthetics. For mortised automatic do...:

What does "LBS" mean in my Von Duprin exit device description?

Resolution: This means Less Bottom Strike in Von Duprin nomenclature:

Can the Von Duprin 996L-NL Rigid Lever Trim be converted to "classroom" Active Lever Trim (996L)?

Resolution: No, the 996 L NL Rigid Lever Trim has a different spindle and different internal parts than the "active" lever trim, 996L. A new 996L lever trim must be obtained.:

Is the Von Duprin 88 EO ready to accept a rim cylinder for NL function?

Resolution: Yes, the 88 EO device has a "drive" cam on the backplate that will retract the latch when turned by a rim cylinder tailpiece. The 88 EO device is also "NL" function. :

Will the PS800 circuit boards work in the newer PS900 power supplies?

Resolution: No, the PS900 power supplies MUST use the newer PS900 circuit boards. The obsolete PS800 circuit boards will NOT work in the PS900 power supplies. :

How do I select an Ives architectural butt hinge?

Resolution: As a starting point, the Ives catalog will answer most questions regarding architectural (butt) hinges. Click HERE for the catalog. Note: These are general GUIDELINES o...:

Does the A501-567 housing sleeve work on both a 7/8" or 1" diameter latch?

Resolution: The A501-567 can be used on both a 7/8" and a 1" latch. When using on a 1" latch the sleeve must be slightly stretched to fit. :

How do I troubleshoot continuous geared hinges?

Resolution: Below are observations that may be reported regarding Ives continuous aluminum geared hinges, follwed by common solutions. Symptoms reported for aluminum geared hinges: ...:

Can I replace the brass nut for Zero automatic door bottoms?

Resolution: If a Zero automatic door bottom is installed as directed per intallation instructions and still needs a small amount of additional actuation, a longer brass nut can be installed onto the do...: