Dwyer A-158 Pitot Tube Clamp

Product Description

The DWYER A-158 is a pitot tube clamp designed to secure pitot tubes in place during air velocity and airflow measurements in HVAC duct systems. Pitot tube clamps provide a stable, leak-resistant mount point in duct walls, allowing technicians to hold the pitot tube at the correct insertion depth without drift or movement during traverse readings. This clamp is installed by HVAC technicians and balancing professionals who perform duct traverses, commissioning work, or air balancing on commercial and industrial ventilation systems.

The A-158 is suited for use in commercial and industrial HVAC applications where accurate, repeatable pitot tube positioning is required. It is commonly used during air balance procedures, TAB (Testing, Adjusting, and Balancing) work, and duct performance verification. The clamp fits into a drilled access hole in the duct wall, allowing the pitot tube to be inserted and held securely at a consistent position across multiple traverse points.

Key Features

• Secures pitot tube at a fixed insertion point in duct walls
• Prevents tube movement during air velocity traverse readings
• Compatible with standard pitot tube outside diameters used in HVAC measurement
• Supports consistent, repeatable positioning across multiple test points
• Suitable for commercial and industrial ductwork applications

Compatibility

Designed as an accessory for use with DWYER pitot tubes in standard HVAC duct traverse and air measurement applications.

Installation Notes

Installation is typically performed by licensed HVAC technicians or certified TAB professionals. Before installing the clamp, ensure the duct system is de-energized and fan equipment is shut down. A properly sized access hole should be drilled in the duct wall to accept the clamp body. Follow applicable SMACNA and ASHRAE guidelines for duct penetration and sealing practices.

Technical Specifications

• Application: Pitot tube retention for HVAC duct traverses

Standard Information

• Brand: DWYER
• Manufacturer Part Number: A-158