Norton Rixson Q51 Series 3/4" ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$3,662.00
$3,519.88
Norton Rixson Norton Rixson Q51 Series - 3/4" Offset Quick Install Removable Shallow Depth Floor Closer with Floor Plate, 250 lbs. Door Weight RIX-Q51

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

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Model: Q5103-90NBC-RH-626
$3,662.00
$3,519.88
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$3,662.00
$3,519.88
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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.

Product Specs

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

Norton Rixson Q5103-90NBC-RH-626 – Frequently Asked Questions

1) Will the Norton Rixson Q51 floor closer work on a 300 lb door?
No. The Q51 Series is rated to 250 lbs of door weight, and it is a standard duty, fixed-size spring closer, so there is no spring adjustment to compensate for a heavier leaf. It is also built around 1-3/4 inch doors up to 4'0 wide and 90 inches tall. A door over 250 lbs needs a heavier-capacity floor closer.
2) What does 3/4 inch offset hung mean for my door prep on the Q51 closer?
Offset hung means the pivot centerline sits 3/4 inch in from the face of the door rather than on the door's centerline, so the door hangs on a top pivot, an intermediate pivot and the closer spindle in the floor rather than on butt hinges. The Q51 is offset hung only, so the frame and door have to be prepped for pivots, not hinges, and the floor pocket has to be laid out from the manufacturer's template for the 3/4 inch offset dimension.
3) Do I have to order a left hand and right hand version of the Q51 floor closer?
Handing is a required choice. The Q51 is a single acting closer built left hand or right hand, so the door swings one direction only and the closer must be ordered to match. Get it wrong and the closer will not work in the opening. Confirm the hand from the outside of the door before ordering.
4) Can I get a hold open version of the Q51 floor closer, and can it also be fire rated?
Both arm functions are offered, automatic hold open and non-hold open, but fire rating applies to the non-hold open build only. If the opening is in a fire rated assembly, order non-hold open. If you want the door to stand open at the swing stop, order automatic hold open and accept that it is not the fire rated configuration.
5) Can the Q51 floor closer be serviced without taking the door down?
Yes, that is the point of the Quick Install removable design. The bottom arm is surface attached, so the closer body lifts out of the cement case with the door still hanging, and the case is made deeper than standard to give room to get at it. For a property manager with floor closers across a lobby, it means a rebuild is a service call rather than a door removal.
6) What pivots come with the Q51 floor closer and do I need anything else for a tall door?
The package includes a 180 degree top pivot and an M19 intermediate pivot, which covers doors up to 90 inches tall. Above 90 inches you need additional intermediate pivots, ordered separately. Order those at the same time so the opening does not sit half hung waiting on parts.
7) Should I pick 90 or 105 degree swing on the Q51 closer?
Pick the degree the opening can physically reach. 90 degrees is the common choice where a return wall, adjacent door or furniture stops the leaf at square; 105 degrees gives extra clearance for carts, gurneys and deliveries where nothing blocks the swing. The closer's stop is built into the unit, so this is set at order time, not adjusted later.
8) What door speed adjustments does the Q51 floor closer have?
Three separate independent valves: closing speed, latch speed and backcheck. That lets you slow the main sweep for an accessible entry, speed up the last few degrees so the latch catches, and cushion the door before it slams into a wall or stop. There is also a delay function on the Q51.
9) Will a floor closer hold up in a lobby where people abuse the hardware?
A concealed floor closer like the Q51 is the usual answer to that problem. The body sits in the floor under a cover plate with nothing overhead to hang on, kick or pry, which is why it gets specified in schools, transit lobbies, municipal buildings and healthcare corridors instead of a surface overhead closer. The case is a rust-proof cement case with a Cycolac cover.
10) Why choose a shallow depth floor closer for an upper floor instead of a standard one?
Depth of pocket is the whole issue. On an upper level you are cutting into a structural slab with a limited topping thickness, and a full depth cement case often will not fit without hitting deck or post-tension cable. The Q51 is a shallow depth design for exactly that condition. On slab-on-grade at ground level, where you can cut as deep as you need, a standard depth closer is usually the simpler choice.
11) Is the Q51 floor closer suitable for an exterior entrance door?
It is specified for commercial interior doors. The description calls out interior applications and the unit is standard duty rated to 250 lbs, which suits lobby, vestibule and corridor leaves rather than a heavy exterior entrance taking wind load. For an exterior opening, look at a heavier duty floor closer sized for the door weight and wind conditions.
12) Which door width do I select when ordering the Q51 floor closer?
Three widths are offered, 36, 42 and 48 inches, and the closer is built for the leaf width you specify because a wider door puts more leverage on the spindle. Measure the actual door leaf, not the rough opening, and select the matching size. The series tops out at 4'0 wide.
13) Can I match the Q51 floor closer cover plate to the rest of my door hardware finish?
Thirteen finishes are offered, covering the brass and bronze range (605 bright brass, 606 satin brass, 611 bright bronze, 612 satin bronze, 613 oil rubbed bronze, 613E dark oxidized satin bronze), nickel (618 bright, 619 satin), chrome (625 bright, 626 satin), 622 black painted, plus BSP black suede powder and WSP white suede powder. For a building standardizing on 626 satin chrome or 613 oil rubbed bronze, the floor plate will match the lever and closer trim on the rest of the openings.
How fast can I get the Norton Rixson Q5103-90NBC-RH-626 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Norton Rixson Q5103-90NBC-RH-626 come with a warranty?
Absolutely. The Norton Rixson Q5103-90NBC-RH-626 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Norton Rixson Q5103-90NBC-RH-626?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Norton Rixson Q5103-90NBC-RH-626 from ZenSupply?
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