The VC7936 Fail Safe Modulating Control Valve provides proportional control of hot or chilled water in commercial heating and cooling applications, such as unit ventilators. On a power failure, this patented actuator design drives the valve to the fail safe position, either fully open or closed, according to the installerТs wiring connections. The VC7936 uses a microprocessor-controlled, low voltage stepper motor with a supercapacitor-based power supply capable of storing enough power to drive the valve to its fail safe position when 24V power is removed from the actuator. DIP switches are used to select actuator response time, flow characterization, motor timing, and control signal.
Features
2-way straight-through or 3-way mixing/diverting body configurations
Fast acting 2-position actuator with soft close technology
Position indicator/manual override lever standard
Replaceable cartridge rebuilds valve to factory specifications without removing valve body from piping
300 psi operating pressure
Combination position indicator/manual flush-and-fill manual lever on all actuators
Product Specifications
Maximum Safe Operating Pressure (psi)
300 psi
Maximum Safe Operating Pressure (kPa)
2068 kappa (20 Bar)
Includes
Cartridge changing tool
Comments
characterized cartridge for use with floating and modulating actuators. Can be controlled by either a low or a line voltage SPDT or SPST or floating controller
Approvals, Canadian Standards Association
CSA Certified
Timing
When used with VC series Actuator--Installer-selectable 60 or 120 seconds
Ambient Temperature Range (F)
32 F to 150 F
Ambient Temperature Range (C)
0 C to 65 C
Connection Type
Sweat
Body Pattern
Three-way A-AB-B
Pipe Size (inch)
1 in.
Pipe Size (DN)
DN25
Fluid Temperature (C)
1 C to 95 C
Fluid Temperature (F)
34 F to 203 F
Maximum Differential Pressure Ratings (Close-off) (psi)
60 psi
Maximum Differential Pressure Ratings (Close-off) (kPa)
