**Aluminum Alloy Housing
**Closer bodies are constructed of a specialaluminum alloy, carefully selected toaccommodate interactive steelcomponents and operating conditions.
**Rack & Pinion Operation
**Provides a smooth constant control of thedoor through its full opening and closingcycle. 180 Degree door swing can be achievedwhen door, frame, hardware and armfunction do not interfere.
**Standard Molded Covers
**Molded of high-impact U.L. listed material. These covers are non-handed for allapplications.
1-1/4" (32mm) diameter piston
5/8" (16mm) diameter pinion journals
2-1/8" (54mm) projection (standard covers)
*Compliance Standards
*
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 3300/3500, 3301/3501 are ANSI/BHMA Grade 1 certified.
All Yaleseries 3300/3500, 3301/3501 closers with non-hold open arms are listed by Underwriters Laboratories for labeled fire doors. This includes compliance to UL10C and UBC-72 (1997) for 3-hour assemblies. The product is manufactured in an ISO 9001 facility. These closers are also listed with the New York City Materials and Equipment Acceptance Division.