Seal-tite 1728-16 Spin-in Collar 16 in Tab Mount with Damper

Product Description

The SEAL-TITE 1728-16 is a round duct board spin-in collar designed to create a 16-inch branch connection in duct board HVAC systems. The collar installs into a field-cut opening in duct board and locks in place using integral mounting tabs that grip the duct board surface. An integrated damper blade at the collar throat provides on-site airflow control, allowing technicians to balance air distribution across multiple branch runs. This fitting is a standard component in low-pressure residential and light commercial supply air systems where duct board is the primary trunk material.

This collar is used in duct board trunk-and-branch layouts where a 16-inch round branch connection is required for round rigid pipe or flexible duct. It is well suited to residential construction and light commercial HVAC installations where duct board plenum or trunk systems feed multiple zones. The tab-mount design eliminates the need for screws or adhesive at the collar body during rough-in, and the built-in damper removes the need for a separate volume control damper at the takeoff point. HVAC installers and sheet metal mechanics are the primary trades that work with this fitting.

Key Features

• 16-inch round collar for duct board branch takeoff connections
• Tab-mount design secures to duct board without additional fasteners at the collar flange
• Integrated damper provides airflow volume control at the branch connection point
• Accepts round rigid pipe or flexible duct at the collar outlet
• Supports balanced air distribution across multi-branch supply systems

Compatibility

Designed as an OEM-style replacement and standard installation fitting for duct board trunk systems requiring a 16-inch round spin-in collar with integrated damper.

Installation Notes

Installation is performed by licensed HVAC technicians or qualified sheet metal mechanics. Shut down the air handling unit and de-energize the system before cutting into the duct board or installing any fittings. Use a proper hole saw or duct board cutting tool sized for a 16-inch opening to ensure a clean, tight fit. Secure all downstream flex duct or rigid pipe connections with approved clamps and seal per local mechanical code requirements.

Technical Specifications

• Connection Size: 16 inches
• Mount Type: Tab Mount
• Damper: Integrated
• Duct Type Compatibility: Duct Board
• Branch Connection: Round Pipe or Flex Duct

Standard Information

• Brand: SEAL-TITE
• Manufacturer Part Number: 1728-16