3/4" Isolation Flow Control Flange, Lead-Free, Thread x Flange

Efficient Isolation & Backflow Control – Bell & Gossett Check-Trol™ 3/4" Flow Control Flange

The Bell & Gossett Check-Trol™ 3/4" Flow Control Flange offers a compact, all-in-one solution for circulator pump installation and maintenance. Designed for use with hydronic heating and cooling systems, it combines an isolation valve, spring check valve, and companion flange into one streamlined component—saving time, space, and labor on the job site.

This valve enables quick pump removal without draining the entire system, making service and replacement work far more efficient. The built-in spring-loaded check valve also prevents unwanted gravity circulation, helping to optimize system performance.

Why Contractors Trust Check-Trol™

• Three Functions in One Body – Integrates an isolation valve, spring check, and flange for maximum efficiency.
• Quick Pump Replacement – Easily isolate the circulator for service without system drainage.
• Anti-Gravity Circulation – Spring check mechanism eliminates unwanted reverse flow when the pump is off.
• Solid Construction – Lead-free brass with chrome plating offers strength, corrosion resistance, and potable water safety.
• High-Temperature and Pressure Ratings – Operates up to 200°F and 150 PSI for demanding hydronic systems.

Technical Specifications

• Connection: 3/4" NPT x Flanged Outlet
• Pressure Rating: 150 PSI max
• Temperature Rating: 200°F max
• Material: Lead-free brass with chrome finish
• Application: Compatible with most standard circulators, including Bell & Gossett ecocirc® models

Professional Installation Notes

This flange is engineered to streamline pump installation, but it requires standard system shutdown and re-pressurization procedures. Alignment with mating flange and correct torque on flange bolts are key to leak-free operation. Use isolation valves upstream and downstream if additional control is needed beyond the integrated shutoff.

Built for the Field

For contractors working in tight mechanical rooms or retrofit scenarios, the Check-Trol™ simplifies both layout and labor. Its multi-functionality eliminates the need for separate flow check valves and isolation unions—helping reduce material costs and installation time.

Key Performance Features

• Integrated Spring Check – Prevents thermal siphoning and ghost flow
• Isolation Valve Functionality – Allows service without draining
• Free-Floating Flange – Aligns easily with circulator pump flanges
• Low-Lead Compliant – Safe for potable systems
• Compact Footprint – Ideal for confined piping spaces

Optimize Your Circulator Install

Whether you're installing new equipment or upgrading a hydronic system, the Bell & Gossett Check-Trol™ Flow Control Flange provides an efficient, code-compliant solution with fewer components and less downtime. Built to meet the demands of modern HVAC systems, it’s the professional’s choice for reliability and performance.