Motorized spring-return 2-port hydronic zone valves Honeywell V4043C 2-port hydronic valves are used in domestic and small commercial heating and cooling applications to control the flow of hot or cold water Port diameter: 3/4 inch Medium type: water or water-glycol mixture according to VDI 2035 Port connection: internal threads Maximum operating pressure: 8.6 bar Max. differential pressure for close-off: 0.55 bar Media temp.: 5 ... 88 oC Ambient temperature: ... 50 oC Materials: Brass valve housing, zinc-plated steel actuator cover and base Valve type: 2-way Power supply: 220-240V, 50Hz Input signal: SPST Cable length: 1000 mm Type of terminals: flying lead Kvs value: 6.9