International Door Closers D311-S Adjustable ADA OHC 105 NHO Back Stop

International Door Closers D311-S Adjustable ADA OHC 105 NHO Back Stop is designed for superior performance in both residential and commercial settings. This concealed overhead closer features a non-hold open function, ensuring doors close securely without compromising accessibility. With an adjustable spring power ranging from 5 to 8.5 pounds, it meets ADA requirements for barrier-free operation, complying with federal accessibility standards. The D311-S is equipped with a robust top arm assembly, available in multiple loading configurations, making it versatile for various installation needs. It includes a dual-purpose bottom pivot set, accommodating both floor and threshold mounting options. The closer's advanced design incorporates a leak-free hydraulic system, featuring a heavy-duty spindle seal and steel end caps for enhanced durability. Adjustment valves for closing and latching speeds are fully adjustable post-installation, ensuring precise control over door movement. With a maximum opening of 105 degrees, the D311-S facilitates easy access, while its compact design allows for installation in headers or transom bars as small as 1 3/4" x 4". Overall, the International Door Closers D311-S is an ideal solution for professionals seeking reliable, compliant, and efficient door control.

Adjustable ADA OHC 105 NHO Back Stop

Complete units for aluminum doors and frames are furnished with top arm assembly (adjustable ‘S’ side loading, "A" end loading, "K" end loading or "PT" end loading), adjustable dual purpose 3010-DP bottom pivot set for floor or threshold mounting (side or end loading) and 3010-FS anchor set with all fasteners. "S" type side loading, "A" type, "K" type, or "PT" type end loading top arms are available for center pivoted applications. "A" type, "K" type or "PT" type end loading and "JO" or "VO" type offset arms are optional, but must be specified. "G" and "GE" type pivot sets are available, but must be ordered separately.

Features:

• I.D.C. provides leak-free guaranteed performance under the most demanding conditions.
• Steel spring cap is now on top of closer body utilizing a new high performance O-ring and epoxy sealed threads for double protection.
• New automotive type heavy duty spindle seal replacing old standard O-ring technology.
• Adjustment valves now with two high performance O-rings for double protection.
• Steel end caps incorporating new high performance O-rings and also epoxy sealed threads for double protection.
• ADA closer with adjustable spring power for a range of sizes from 5lb to 8.5lb light and medium spring tension, fully adjustable after installation.
• Barrier free operation to comply with federal accessibility standards (ADA): complying with ANSI A117.1 (4.13.11) available for center pivoted applications.
• Built-in positive back stop and hold-open positions available:
• D310: 105° Back stop with hold-open
• D311: 105° Back stop - no hold-open
• D312: 90° Back stop with hold-open
• D313: 90° Back stop - no hold-open
• Suitable for both center hung (double or single acting) and offset doors.
• Two control valves: Closing speed and latching speed, fully adjustable after installation.
• Fits in an aluminum header or transom bar as small as 1 3/4" x 4".
• Stable hydraulic door check fluid for any climatic operation and constant lubrication
• Optional 3/4" spindle available.

Resources

• Cut Sheet
• Installation Sheet