Description
The Reznor 257665 is a precision-engineered valve and actuator assembly designed for demanding commercial and industrial HVAC hydronic control applications. Featuring a 1/2″ NPT connection and an 11.7 Cv flow coefficient, this two-way equal percentage flow ball valve delivers accurate, repeatable modulation for heating and cooling coil control, fan coil units, and air handling equipment.
Valve Body & Trim
- Brass body construction for durability and corrosion resistance
- Plated brass trim ball valve for long service life
- 1/2″ NPT end connections for easy installation
- Two-way equal percentage flow characteristic for precise control
- 11.7 Cv flow coefficient
Actuator & Control Signals
- 24 Vac power supply
- Accepts 0–10 Vdc control signal
- Accepts 2–10 Vdc control signal
- Accepts 4–20 mA control signal (with included 500 ohm resistor)
- Non-spring return design
- Direct coupled actuator — no linkage required
Operating Modes
- Modulating control
- Floating (tri-state) control
- Two-position (on/off) control
- SPDT auxiliary switch included
Key Benefits
- Versatile signal compatibility supports BAS/DDC integration
- Equal percentage flow characteristic ensures stable loop performance across the full stroke
- Non-spring return saves energy when valve position must be maintained during power interruptions
- Factory-assembled valve and actuator reduces installation time and eliminates field coupling errors
- Compact direct-coupled design fits tight mechanical spaces
The Reznor 257665 is an ideal replacement or upgrade valve assembly for Reznor unit heaters, cabinet unit heaters, and other hydronic heating equipment requiring precise flow control. Order from Jackson Systems for expert support and fast fulfillment.
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