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PDQ 7101 BC DS Heavy Duty Door Stop Closer Closer - Parallel Stop Arm with Backcheck Adjustment
*** Retrofits LCN 4040XP and 4041 closer (Same Hole Pattern & Closer Arms) ****
The PDQ 7101 BC DS is an industrial-grade Surface Mounted Door Closer engineered for the most demanding high-traffic environments. As a Grade 1 certified hardware solution, this closer is designed to withstand millions of cycles in schools, hospitals, and retail centers. Notably, this unit retrofits LCN 4040XP and 4041 closers, utilizing the exact same hole pattern and closer arms, making it the ultimate solution for seamless facility upgrades.
The DS (Dead Stop) parallel arm is a critical security and maintenance solution, featuring a built-in mechanical stop that prevents the door from swinging past a set angle. This eliminates the need for unsightly floor or wall stops and protects the door, frame, and adjacent hardware from damage caused by wind gusts or abusive "over-swinging." Constructed with a heavy-duty cast aluminum body and high-performance all-weather fluid, the PDQ 7101 ensures consistent closing speeds in temperatures ranging from -35°C to 49°C.
DS Parallel Arm & Backcheck Function Summary
The Dead Stop (DS) and Backcheck (BC) features work in tandem to provide complete control over the door's opening and closing arc:
- Dead Stop (DS) Parallel Arm: Specifically designed for "Push Side" mounting. It incorporates a physical stop within the arm assembly that halts the door at a predetermined point (usually 90° or 110°). It is the premier solution where floor stops are impractical.
- Adjustable Backcheck (BC): This hydraulic function begins at approximately 70° of the opening cycle. It creates resistance to slow the door down as it reaches the end of its swing, preventing the door from being slammed with excessive force.
- Closing and Latching Speed: Dual independent valves allow for the fine-tuning of the "Closing" speed (from fully open to 10°) and the "Latching" speed (the final 10°), ensuring a quiet and secure close.
Technical Specifications
| Feature | Details |
| Model | PDQ 7101 BC DS |
| Retrofit Compatibility | LCN 4040XP and 4041 (Same Hole Pattern & Arms) |
| ANSI/BHMA Grade | Grade 1 (Tested to 2 Million+ Cycles) |
| Body Material | Heavy Duty Cast Aluminum |
| Arm Type | DS (Dead Stop) Heavy Duty Parallel Arm |
| Spring Power | Adjustable Size 1–6 (Meets ADA requirements) |
| Function | Backcheck (BC), Closing, and Latching Valves |
| Finish | 689 (Satin Aluminum) |
| Certifications | UL 10C 3-Hour Fire Rated; ADA Compliant |
Engineered Solutions for Facility Protection
The PDQ 7101 BC DS addresses common mechanical failures in commercial door openings:
- Seamless Retrofit Upgrades: Because this unit matches the footprint of the LCN 4040XP/4041, maintenance teams can swap out failing units without drilling new holes, saving significant labor time and preserving the integrity of the door.
- Eliminates Wall and Frame Damage: The Dead Stop arm prevents the door from over-extending, which would otherwise pull hinges from the frame or damage drywall in high-wind or high-traffic zones.
- Meets ADA Accessibility Standards: With adjustable spring power from Size 1 to 6, this closer can be set to a low opening force for interior compliance while maintaining the strength to close heavy exterior doors.
- Fire Safety Compliance: This closer is UL listed for use on fire-rated doors, ensuring the door returns to the latched position every time to maintain fire barriers.
- All-Season Reliability: Utilizing temperature-stable fluid, the PDQ 7101 ensures consistent operation regardless of whether it is a freezing winter or a scorching summer.
| General - US Finishes | 689 - Spray Alumimun or 693 - Spray Black or 695 - Spray Dark Bronze or 696 - Spray Gold |
| Brand | PDQ |
| Closer Arm Type | HD Positive Stop |
| Series | PDQ - 7100 Series |
| Hold Open | Non-Hold Open |
| Closer Body Hole Pattern | 1"/3"/1" x 2 1/4" (LCN 4040) |
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