Honeywell v88a1691/u 1.5 in Diaphragm Gas Valve 24V

Product Description

The HONEYWELL v88a1691/u is a 1.5-inch diaphragm gas valve designed for 24 VAC low-voltage service in gas-fired heating systems. The valve uses a diaphragm that is both weight-loaded and spring-loaded, ensuring a firm, positive close on every cycle. Maximum closing time is two seconds. On loss of power, the valve closes automatically, making it suited for final shutoff service. Opening time is field-adjustable using various sized bleed orifices or an adjustable bleed valve. The body is cast aluminum in a straight-through valve pattern. Licensed HVAC technicians and gas-fitting professionals are the primary installers of this valve.

The v88a1691/u is rated for use with natural gas, LP gas, and manufactured gas, making it a versatile fit across residential and light commercial heating applications. The 24 VAC control signal aligns with standard low-voltage thermostat and control-board wiring used in forced-air furnaces and similar gas appliances. The straight-through body pattern simplifies in-line installation in gas train piping. A valve position indicator is available as an accessory for installations where visual confirmation of valve status is required.

Key Features

• 1.5-inch valve body in a straight-through pattern for direct in-line installation
• Diaphragm is both weight-loaded and spring-loaded for a firm, positive close
• Two-second maximum closing time for fast shutoff response
• Closes automatically on power failure — suitable for final shutoff service
• Field-adjustable opening time via bleed orifice selection or adjustable bleed valve
• Compatible with natural gas, LP gas, and manufactured gas
• Cast aluminum body for lightweight, corrosion-resistant construction

Compatibility

Designed for 24 VAC low-voltage gas-fired heating system service. Valve position indicator is available for the 1.25-inch model V48A2227. The V88 series is the 24 VAC counterpart to the V48 series, which is rated for line-voltage service.

Installation Notes

Installation must be performed by a licensed HVAC technician or qualified gas-fitting professional in accordance with local codes and the applicable provisions of the International Fuel Gas Code (IFGC). Shut off the manual gas supply and de-energize the 24 VAC control circuit before removing the existing valve. Verify gas type, inlet pressure, and flow direction before installing the replacement valve. Leak-test all connections with an approved gas-leak detection solution after installation and before returning the system to service.

Technical Specifications

• Control Voltage: 24 VAC
• Valve Size: 1.5 inches
• Valve Pattern: Straight-through
• Closing Mechanism: Weight-loaded and spring-loaded diaphragm
• Maximum Closing Time: 2 seconds
• Compatible Gas Types: Natural gas, LP gas, manufactured gas
• Body Material: Cast aluminum
• Fail Position: Closes on power failure

Standard Information

• Brand: HONEYWELL
• Manufacturer Part Number: v88a1691/u