Westinghouse 921691 Two Stage Natural Gas Valve

Product Description

The WESTINGHOUSE 921691 is a two-stage natural gas valve designed for use in gas-fired heating equipment. A two-stage valve delivers low-fire ignition followed by full-fire operation, allowing the burner to start at a reduced capacity before stepping up to full output. This staged firing approach improves combustion stability, reduces thermal shock to the heat exchanger, and supports more consistent temperature control. The 921691 is installed by licensed gas technicians or HVAC technicians during new installations or as a direct replacement when a faulty valve is identified during service.

This valve is suited for residential and light commercial gas furnace applications where two-stage firing is required. Two-stage heating systems are common in mid- to high-efficiency gas furnaces that pair with two-stage thermostats or modulating controls. The valve is a direct-replacement-style component used when the original valve fails to open, fails to regulate properly, or shows evidence of leakage or electrical fault at the coil.

Key Features

• Two-stage operation provides low-fire and high-fire output for improved combustion control
• Configured for natural gas service
• Direct OEM-style replacement for gas furnace applications
• Compatible with standard gas valve wiring harness configurations found in residential furnace platforms
• Supports staged firing for reduced heat exchanger thermal stress

Compatibility

Designed as an OEM-style replacement two-stage natural gas valve for residential and light commercial gas furnace systems. No specific model compatibility data was provided in the product input.

Installation Notes

Gas valve replacement must be performed by a licensed gas technician or HVAC technician in accordance with local codes and the IFGC. Shut off the manual gas supply and disconnect electrical power to the unit before beginning work. After installation, test all gas connections with an approved leak-detection solution before restoring power and firing the system. Do not attempt to repair or modify the valve body.

Technical Specifications

• Gas Type: Natural Gas
• Stage Configuration: Two Stage

Standard Information

• Brand: WESTINGHOUSE
• Manufacturer Part Number: 921691