Hydrotherm BM-7989 Gas Valve

The Hydrotherm BM-7989 Gas Valve is an industrial-grade 3/4" 2-stage combination gas control engineered for high-capacity intermittent pilot appliances. Serving as the direct replacement for VR8304Q4511, this valve manages fuel flow with a 300,000 BTU/hr capacity, making it a critical component for Hydrotherm boiler service and commercial furnace maintenance. This unit features a straight-through body pattern and is designed for 24 Vac systems, pulling 0.5A with both operators energized.

The BM-7989 dual stage valve includes a built-in pressure regulator with factory settings of 1.7" w.c. on low fire and 3.5" w.c. on high fire. For technicians working on site, the included natural gas to LP conversion kit and 3/4" x 1/2" reducer bushings provide the necessary flexibility for varying field requirements. The assembly incorporates a solenoid-operated first automatic valve and a diaphragm-operated second valve to ensure precise natural gas flow regulation and safety shutoff. All electrical connections utilize 1/4" quick-connect male terminals, while the pilot outlet is a standard 1/4" compression fitting, allowing for streamlined integration into existing intermittent pilot ignition systems.

Key Benefits

• Precise 2-Stage Firing: Maintains appliance efficiency by switching between low and high fire modes based on demand.
• Broad Compatibility: Functions as a drop-in replacement for the VR8304Q4511 gas valve, commonly found in Hydrotherm and Mestek heating systems.
• Field Versatility: Ships with a Liquid Propane (LP) kit and reducer bushings for rapid adaptation to different fuel types and pipe sizes.
• Compact Design: Small footprint with a 0 to 90-degree mounting range simplifies installation in tight equipment cabinets.
• Standardized Service: Top-accessible adjustments for the pilot and regulator ensure efficient maintenance and pressure tuning.

Common Questions

No, this is a 24 Vac low-voltage control valve. Ensure the transformer and control module output matches these electrical ratings before installation.

Yes, while configured for natural gas, it includes a conversion kit for Liquid Propane applications to meet specific fuel requirements.

No, this valve is specifically designed for intermittent pilot ignition systems and should be used with compatible control modules like the S8600 series.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.