Norton Rixson 427 Series Heavy Duty Floor Closer with 3/4" Offset Design for 250 lb Doors

Norton Rixson 427 Series Heavy Duty Floor Closer with 3/4" Offset Design for 250 lb Doors

Professional Floor Closer Solution for Deep Reveal Applications

The Norton Rixson 427 Series is a heavy-duty 3/4" offset-hung floor closer engineered for deep reveal door frame installations supporting interior or exterior doors weighing up to 250 lbs. This Grade 1 certified closer features a robust Cycolac rust-proof cement case construction and accommodates doors from 60" to 90" in height with door widths up to 4'0". The unit includes separate independent valves for closing speed, latch speed, and backcheck control with built-in positive dead stop functionality.

Professional Features & Benefits

• Heavy-Duty Weight Capacity: Supports doors up to 250 lbs with robust internal components designed for consistent long-term operation in demanding applications.
• 3/4" Offset Design: Specifically engineered for deep reveal and alcove door frame installations where standard closers cannot accommodate the frame depth.
• Precision Speed Control: Separate independent valves for closing speed, latch speed, and backcheck provide enhanced operational control and smooth door movement.
• Built-in Dead Stop Protection: Heavy-duty hardened one-piece steel spindle with positive dead stop prevents doors from swinging beyond desired opening degree (specify 85°, 90°, 95° or 105°).
• Versatile Door Compatibility: Accommodates doors 60" to 90" in height and up to 4'0" in width for interior or exterior single-acting applications.
• Weather-Resistant Construction: Cycolac rust-proof cement case provides durability for both interior and exterior door installations.
• Grade 1 Certification: ANSI/BHMA A156.4 Grade 1 rating ensures commercial-grade performance and reliability standards.
• Manufacturer Warranty: 10-year limited warranty provides long-term protection and confidence in product durability.

Technical Specifications

• ANSI/BHMA: ANSI/BHMA A156.4, Grade 1
• 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: Heavy Duty
• Grade: Grade 1
• Hang Type: Offset Hung
• Hold Open Feature: No
• Mounting Method: Offset
• Product Category: Door Controls
• Product Group: Door Controls
• Product Model: 427N
• Product Subgroup: Door Closers - Floor
• Product Type: Floor Door Closers
• Series: 427 Series
• Subcategory: Floor Closers
• Warranty: 10 Year Limited

Installation & Operation

1. Review manufacturer specifications and verify door preparation requirements including door thickness, weight capacity up to 250 lbs, and deep reveal frame compatibility for this offset-hung design.
2. Use manufacturer-provided templates to mark mounting hole locations accurately on floor and door frame surfaces, ensuring proper alignment for 3/4" offset installation.
3. Prepare floor and frame by drilling required holes and routing as specified in manufacturer instructions for the 427N model configuration.
4. Install 180 x 102 top pivot (included) and 119 intermediate pivots (order separately) according to door height requirements - doors 60" to 90" require one intermediate pivot with additional pivots for each 30" increment.
5. Mount floor closer unit and secure all mounting hardware per manufacturer torque specifications, ensuring proper vertical door adjustment capability.
6. Adjust separate independent valves for closing speed, latch speed, and backcheck to achieve desired door operation and set built-in dead stop to specified degree (85°, 90°, 95° or 105°).
7. Test closer operation throughout full range of motion and verify proper weight support and smooth operation. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

• Commercial Office Buildings with Deep Reveal Entrances
• Educational Facilities with Alcove Door Installations
• Healthcare Institutions Requiring Heavy-Duty Door Control
• Retail Establishments with Wide Door Applications
• Industrial and Warehouse Facilities with Exterior Access
• Multi-Tenant Residential Properties with Commercial-Grade Requirements
• Government and Municipal Buildings with Specialized Frame Configurations

Why Choose Norton Rixson Quality?

Norton Rixson 427 Series floor closers deliver professional-grade reliability with heavy-duty hardened one-piece steel spindle construction and robust internal components engineered for consistent long-term operation. ANSI/BHMA A156.4 Grade 1 certification and 10-year limited warranty ensure dependable performance in demanding commercial applications. The unique 3/4" offset design and Cycolac rust-proof cement case construction provide specialized solutions for deep reveal installations where standard closers cannot accommodate frame requirements.