Round Duct

Technical Data

Tested to 20" WG positive pressure, withstood 10" negative pressure with no leakage noted.

Features and Advantages

Quick Installation. No measuring (self-adhesive cut-around template provided). No frame to install and seal. Effortless opening and closing. No tools required. Conical springs and plastic hand knobs make operation easy. Air tight seal. Due to the design and neoprene gasket. Reduced friction. The inside surface of the door is smooth.

Installation

Installation instructions are available in the Spec Data file for this product. Please refer to the Ductmate Library.

• Remove protective backing from template and adhere to duct wall in desired location.
• Cut opening around perimeter of template.
• Install door in opening (insert at an angle).
• Tighten knobs finger-tight (do not overtighten).

Guarantees

The Sandwich Access Doors are guaranteed against defective material.

Technical Services

Detailed installation instructions illustrating easy step-by-step procedures are available from the manufacturer and shipped in each box of access doors.

Availability

All Ductmate products are available through its global manufacturing and distribution network.

Access Doors for Grease Duct and Hi-Temperature Applications

Gasket

Hi-Temperature Fiberglass Rope (1000 F. max) or Ceramic Fiber Gasket (2300 F. max - meets NFPA 96 standards) is permanently bonded to front (top) plate of access door to eliminate leakage. Conical Springs are installed over the bolts, between the inner and outer door to facilitate opening. Hi-Temperature Access Door application approval resides with authority having jurisdiction.

Template

Duct opening cut-out template is provided for exact size of Duct opening required.

Inside Door

The two layers of metal are spotwelded together at the rim. Inside surface of Access Door is smooth, to reduce friction.

Knobs

Zinc coated wing nuts are easily turned by hand, no wrenches required.

Observation Doors

Description

This high-pressure access door contains a 4" x 2-5/8" viewport, allowing the user to easily inspect the inside of the ductwork without having to remove the door.

Panels

The observation Access Door consists of two layers of precision stamped, hot-dipped galvanized steel.

Gasket

Closed cell neoprene gasket is UL94HF1 listed with a service temperature range of (ASTM D 746) -20°F to 200 °F. The gasket is permanently bonded to the inside panel to eliminate leakage.

Springs

Zinc plated conical springs are installed, between the inner and outer door, to facilitate opening.

Knobs

Red polypropylene molded knobs have threaded metal inserts to eliminate thread stripping. Knobs are easily turned by hand. Knobs are UL94HB listed.

Bolts

Zinc plated carriage bolts are clinched and sealed to the inner door.

Glass

Safety glass (1/4") is permanently sealed with silicone. Plexi-glass may be installed if requested.

Clips

Hot-dipped galvanized steel clips mechanically fasten the safety glass in place.

Template

Self adhesive template is provided for the exact size of duct opening required.