Overview The Fail Safe VC6936 Floating and VC7936 Modulating Control valves 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. These actuators use a microprocessor-controlled, low voltage stepper motor with a super capacitor-based power supply capable of storing enough power to drive the valve to its when 24V power is removed from the actuator. A VC hydronic valve consists of a valve body, a replaceable characterized cartridge assembly and a Honeywell VC6900 or VC7900-series actuator, providing proportional flow control. Three-way bodies may be used in either diverting or mixing applications. VC valves use cam-operated cartridge travel to resist water hammer. Limit switches prevent motor overrun. For best control, outdoor temperature compensation of supply water temperature is recommended. Product Specifications Maximum Safe Operating Pressure (psi)300 psi Maximum Safe Operating Pressure (kPa)2068 kappa (20 Bar) Commentscharacterized cartridge for use with non-fail safe floating and modulating actuators Approvals, Canadian Standards AssociationCSA Certified TimingWhen used with VC series Actuator--2 minutes Ambient Temperature Range (F)32 F to 150 F Ambient Temperature Range (C)0 C to 65 C Connection TypeFemale NPT Body PatternThree-way A-AB-B 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)3.7 Cv Capacity (Kv)3.2 kvs Valve ActionStem up to close A port Valve TypeCartridge Cage Valve Controlled FluidChilled 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 CharacteristicLinear ActuationFloating (24V SP3T) fail-safe Stem Travel (in.)0.4 in. Stem Travel (mm)10 mm Materials (Packing)EPDM rubber