Norton Rixson Q51 Series 3/4" Offset Floor Closer with Quick Install Design - 250 lbs Door Weight Capacity

Norton Rixson Q51 Series 3/4" Offset Floor Closer with Quick Install Design - 250 lbs Door Weight Capacity

Professional Shallow-Depth Floor Closer Solution

The Norton Rixson Q51 Series floor closer delivers professional door control for interior doors weighing up to 250 lbs with a space-saving 3/4" offset-hung design. This shallow-depth floor closer accommodates 1-3/4" doors and includes a 180° top pivot and M19 intermediate pivot for complete installation. Constructed with robust materials and a rust-proof cement case, this single-acting closer provides enhanced control through separate independent valves for closing speed, latch speed, and backcheck adjustment.

Professional Features & Benefits

• Door Weight Capacity: Supports doors up to 250 lbs with professional-grade performance for commercial interior applications.
• Shallow Depth Design: 3/4" offset-hung configuration ideal for upper levels of multi-story buildings where space is limited.
• Complete Installation Package: Includes 180° top pivot and M19 intermediate pivot for doors up to 90" in height with additional pivots available for taller doors.
• Enhanced Control System: Separate independent valves provide precise adjustment of closing speed, latch speed, and backcheck for optimal door operation.
• Vandal-Resistant Construction: Concealed in-floor installation with robust materials and internal components provides security and durability.
• Quick Install Removable Design: Surface-attached bottom arm allows closer removal without demounting door, with increased cement case depth for easy service access.
• Flexible Door Compatibility: Accommodates door widths up to 4'0" and heights up to 90" with standard intermediate pivot included.
• Manufacturer Warranty: 2-year limited warranty for added confidence and protection.

Technical Specifications

• Commercial/Residential: Commercial
• Cover Type: Cycolac, rust-proof cement case
• Delay Function: Yes
• Department: Door Hardware
• Door Swing: Single Acting
• Door Weight: 250 lbs.
• Duty Level: Standard Duty
• Fire Rating: Yes
• Hang Type: Offset Hung
• Hold Open Feature: No
• Mounting Method: Offset
• Product Category: Door Controls
• Product Group: Door Controls
• Product Model: Q5103NBC
• Product Subgroup: Door Closers - Floor
• Product Type: Floor Door Closers - Shallow Depth
• Series: Q51 Series
• Spring Type: Fixed Size
• Subcategory: Floor Closers
• UL Listing Type: Certain models UL Listed (F prefix)
• Warranty: 2 Year Limited

Installation & Operation

1. Review manufacturer specifications and verify door preparation requirements including door thickness of 1-3/4", door weight up to 250 lbs, and door width up to 4'0".
2. Use manufacturer-provided templates to mark floor pocket location and mounting hole positions for the 3/4" offset configuration.
3. Prepare floor pocket to accommodate the shallow-depth cement case and ensure proper drainage if required by local conditions.
4. Install the floor closer in the prepared pocket and secure the rust-proof cement case per manufacturer specifications.
5. Mount the 180° top pivot and M19 intermediate pivot to door and frame using provided hardware and thru bolt attachment method.
6. Adjust the separate independent valves for closing speed, latch speed, and backcheck to achieve desired door operation and test throughout full 5° beyond hold open point range.

Professional Applications

• Commercial Office Buildings
• Educational Facilities
• Healthcare Institutions
• Multi-Story Building Upper Levels
• Retail Establishments
• Government and Municipal Buildings
• Industrial and Warehouse Facilities

Why Choose Norton Rixson Quality?

Norton Rixson Q51 Series floor closers deliver professional-grade reliability with robust materials and internal components designed for demanding commercial applications. The 2-year limited warranty and UL listing availability (F prefix models) demonstrate the manufacturer's commitment to quality and code compliance. Engineered with vandal-resistant concealed installation and enhanced control valves, this closer provides dependable performance where professional door control is essential.