Overview Two-way on-off low voltage valves consist of an actuator and valve assembly for controlling the flow of hot water. Features Manual opener (on all models except straight-through normally open valves) for valve operation on power failure valve returns to automatic position when power is restored. All models may be installed without disassembling the valve. Compact construction for easy installation. Complete powerhead may be removed or replaced without breaking plumbing line connections or draining the system. Actuator motor may be replaced without removing the valve body or draining the system. Product Specifications ApplicationHydronic ControlDimensions (in.)4 in. high x 4 11/16 in. wide x 2 3/8 in. deepDimensions (mm)102 mm high x 118 mm wide x 60 mm deepIncludesWith 2 straight 3/4 in. sweat adapters.Commentswith (2) 3/8 in. flare to 3/4 in. sweat adapters. Valve designed for cycling (not constantly powered on) applications.Frequency50 Hz 60 HzApprovals Canadian Standards AssociationCSA Certified: File 1322Operating Humidity Range (% RH)5 to 95% relative humidity non-condensing.Voltage24 Vac Power Consumption--7.7 VATimingNominal Open--15 secAmbient Temperature Range (F)125 F MaximumAmbient Temperature Range (C)52 C MaximumConnection TypeFlareBody PatternTwo-way Straight-throughPipe Size (inch)3/8 in.Pipe Size (DN)DN10Current Draw0.32AFluid Temperature (C)5 C to 93 CFluid Temperature (F)40 F to 200 FMaximum Differential Pressure Ratings (Close-off) (psi)20 psiMaximum Differential Pressure Ratings (Close-off) (kPa)138 kPaElectrical Connections (in.)18 in. leadsElectrical Connections (mm)457 mm leadsCapacity (Cv)3.5 CvCapacity (Kv)3 KvValve Action Spring return to open Valve Type Zone Valve Materials (Body) Brass Materials (Seat) Brass Materials (Stem) Stainless Steel Actuation Two position De-energized Position Normally Open Static Pressure Rating (psi) 125 psi Static Pressure Rating (kPa) 862 kPa Materials (Plug/Ball/Disc) Buna-N (NBR) Rubber Ball Materials (Packing) EPDM rubber Manual Opener No