The Bell & Gossett Circuit Setter Plus® is a calibrated balance valve designed for pre-set proportional system balance. Since its introduction to the HVAC industry in 1968, the Bell & Gossett Circuit Setter has set the standard for proportionally balancing hydronic HVAC systems. This system balance method, developed by Bell & Gossett, assures optimum system flow balance at minimum pump operating horsepower. Valves can simply be pre-set using the B&G Circuit Setter Balance Valve Calculator, curve booklet G10091, or the System Syzer application for iPhone, iPad, or PC.
Product Features & Benefits
Cost-Saving Advantages
The Bell & Gossett Circuit Setter Plus calibrated balance valve has been designed, manufactured and tested to provide the cost saving advantages of pre-set proportional balance. Each valve is a three function precision instrument providing flow balance, flow metering and shut-off.
Velocity Head Recovery
Changes in fluid velocity through the valve orifice are as illustrated. Actual pressure drop imposed against the pump (∆P from C to D) is on the order .7 to .9 of the value as read across the read-out ports A-B. These differences are significant enough to require two different sets of ∆P data to be shown on the Circuit Setter Balance Valve Calculator.
Circuit Setter Balance Valve Calculator
The Circuit Setter Calculator is the result of rigorous laboratory tests. Side 1 plots actual system imposed head loss versus flow for various valve settings. This scale is used for pre-set balance determination. Side 2 is used when taking gauge readings across the Circuit Setter balance valve using the valve as a flow meter.
System Syzer Desktop Application
The Circuit Setter System Syzer desktop application is a convenient and easy way to utilize the information on a Circuit Setter Balance Valve Calculator. The application can determine either flow rate based on head loss and valve setting, or the valve setting necessary based on head loss and flow rate across the valve. The unit of measurement can be changed between SI and English units, and fluid makeups of water, Ethylene Glycol, Propylene Glycol, or a custom fluid composition are available.
System Syzer Phone App
Available for iPad, iPhone, or Android operating systems, the Circuit Setter System Syzer phone application is a convenient and easy way to utilize the System Syzer app while out in the field. This application can perform all the same duties as the desktop application, but is perfect for setting a valve out in the field, or determining flow rates based on pressure drop and valve setting.
Variable Orifice Flow Meter
Circuit Setter balance valves can be used as a variable orifice flow meter. A differential pressure meter is applied directly across the valved read-out ports. Determine flow rate by using Side 2 of the Circuit Setter Calculator.
Sizes & Styles
Circuit Setters are available in a wide range of sizes and styles to meet all your system demands. Brass valves, in sizes ½” through 3”, utilize a full port ball valve with calibrated nameplate and feature a memory stop and two integrated pressure/temperature ports for easy ∆P measurement. Additionally, All brass Circuit Setters are CSA certified to be in compliance with the low lead requirements of California, Vermont, Maryland, Louisiana, and NSF//ANSI 372.
For larger sized systems, Circuit Setters are available in ball style (2½” – 4”) and globe style (4” – 12”). Our globe style valves include a multi-turn stem, calibrated nameplate, memory button for easy re-setting of the valve position after shut-off/isolation, and integrated pressure/temperature ports.
Bell and Gossett Distributors
As authorized Bell and Gossett distributors, we ensure prompt access to Bell and Gossett’s industry-leading solutions, which meet the various demands of clients across the areas of Austin, Houston, and San Antonio, Texas.
