International Door Closers 231-S Medium OHC 105 Degree NHO Back Stop

International Door Closers 231-S Medium OHC 105 Degree NHO Back Stop is engineered for reliability and performance in aluminum door applications. This concealed overhead closer seamlessly integrates into your door system, providing a robust solution with adjustable ‘S’ side loading and end loading options, ensuring flexibility based on your installation needs. One of the standout features is the built-in positive back stop at a 105-degree angle, which enhances door control without the hold-open function. The unit accommodates ADA compliance with adjustable spring tensions, offering a 5 lb. opening force for interior doors and 8-1/2 lb. for exterior doors, making it suitable for a variety of environments. The hydraulic door check fluid ensures stable operation in any climate, while the two speed control valves allow for precise adjustments to closing and latching speeds, ensuring smooth functionality. This closer fits within aluminum headers or transom bars as compact as 1-3/4" x 4", making it a versatile choice for various architectural styles. Complete with a dual-purpose 3010-DP bottom pivot set and 3010-FS anchor set, the 231-S is ready to enhance your door’s performance right out of the box, with optional pivot sets available for specialized configurations. Choose the International Door Closers 231-S for a dependable, high-quality solution tailored to your security and accessibility needs.

Medium OHC 105 Degree 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. 3010-G and 3010-GE bottom pivot sets are available, but must be ordered separately.

Features:

• Built-in positive back stop and hold-open positions available:
• 230: 105° Back stop with hold-open
• 231: 105° Back stop - no hold-open
• 232: 90° Back stop with hold-open
• 233: 90° Back stop - no hold-open
• ADA spring tensions available for use on center pivoted applications:
• 5 lb. opening force (interior door)
• 8-1/2 lb. opening force (exterior door)
• Standard spring tensions available: Light, medium & heavy
• Two speed control valves
• Closing and latching speeds controlled by separate regulating valves, fully adjustable after installation.
• Fits in an aluminum header or transom bar as small as 1-3/4" x 4".
• Positive centering for alignment and to hold door closed against any normal wind or draft.
• Stable hydraulic door check fluid for any climatic operation and constant lubrication.
• "S" type side loading top arms and 3010-DP adjustable dual purpose pivot set and 3010-FS anchor set will be furnished unless otherwise specified.
• "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.