Overview
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 installer’s 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
- Corrosion resistant, engineered plastic actuator housing
- 60 psid close-off on all models
- 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 kPa (20 Bar)
- Includes
- Cartridge changing tool
- Comments
- characterized cartridge for use with non-fail safe floating and modulating actuators
- Approvals, Canadian Standards Association
- CSA Certified
- Ambient Temperature Range (C)
- 0 C to 65 C
- Ambient Temperature Range (F)
- 32 F to 150 F
- Connection Type
- Sweat
- Timing
- When used with VC series Actuator--Modulating within 165s/50Hz or 140s/60Hz
- Body Pattern
- Two-way, Straight-through
- Pipe Size (inch)
- 1/2 in.
- Pipe Size (DN)
- DN15
- 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)
- 414 kPa (4 bar)
- Capacity (Cv)
- 3.5 Cv
- Capacity (Kv)
- 3.1 kvs
- Valve Action
- Stem up to close A port
- Valve Type
- Cartridge Cage Valve
- Controlled Fluid
- Chilled or hot water with up to 60% Glycol
- Materials (Body)
- Bronze
- Materials (Seat)
- EPDM O-ring seals on Noryl piston
- Materials (Stem)
- Stainless Steel
- Materials (Cartridge)
- Ryton™, Noryl™ engineering plastic
- Flow Characteristic
- Linear
- Actuation
- Modulating/Floating/PWM fail-safe
- Stem Travel (in.)
- 0.4 in.
- Stem Travel (mm)
- 10 mm
- Materials (Packing)
- EPDM rubber
There is no literature attached to this product, please try another material search. If you believe that there should be literature for this product, please contact Customer Care for website support.