3/4" Threaded Straight-Angle Flow Control

Bell & Gossett 107034 Flo-Control Valve – 3/4" Straight-Angle Flow Regulation for Hydronic Heating Systems

The Bell & Gossett 107034 Flo-Control Valve is engineered to maintain proper zoning and flow control in closed-loop hydronic heating systems. Designed as a straight-angle valve with 3/4" NPT connections, this unit plays a vital role in preventing gravity circulation and eliminating unwanted heat migration between inactive zones. It provides dependable flow management in both horizontal and vertical piping applications.

Ideal for residential and light commercial heating systems, this cast iron valve incorporates a vertical lift disc with a manual operating lever and a removable cap for easy internal access. It is designed to enhance zone isolation and improve the overall efficiency of multi-zone heating applications using zone valves or multiple circulators.

Performance Features

• Flow Control: Prevents unwanted circulation due to gravity or back pressure when zones are inactive.
• Manual Override: Integrated lever allows for temporary gravity flow when needed—useful during system fill, purge, or power outages.
• Serviceability: Top access cap permits cleaning or servicing the internal disc without removing the valve from the line.
• Directional Flexibility: Suitable for vertical or horizontal installations based on system design.
• Isolation Capability: Supports heating system zoning without the need for additional check valves.

Technical Specifications

• Model: B&G 107034 (Flo-Control Valve)
• Size: 3/4" NPT Straight-Angle
• Pressure Rating: Up to 125 PSI
• Max Temperature: 250°F
• Body Material: Cast Iron
• Disc Type: Vertical lift, springless

Installation Notes

The 107034 Flo-Control Valve is intended for professional installation in closed-loop systems. It should be installed with the arrow aligned to the system’s flow direction. For optimal performance and long-term reliability, all threaded connections should be sealed with appropriate pipe compound or tape, and care should be taken to ensure alignment and support to avoid strain on the valve body.

Application Insights for Contractors

This valve is a workhorse in traditional hydronic setups—whether integrated with zone circulators or zone valve configurations. Its passive control design reduces call-back risk and improves control over heated zones. The manual lever provides flexibility during system startup and diagnostics, while the removable cap design simplifies in-place maintenance without system drainage.

System Benefits

• ? Reliable zone isolation and backflow prevention
• ? Helps eliminate overheating in inactive zones
• ? Reduces energy waste from uncontrolled thermal siphoning
• ? Field serviceable without full system shutdown

The Bell & Gossett 107034 is a dependable flow control solution for hydronic contractors looking to improve system zoning, control unwanted heat migration, and maintain service access. Its durable construction, flexible installation, and proven performance make it a staple in quality heating installations.