VD220-2.5

VD215-VD232 Single-seated 2-way valves for modulating control of hot / chilled water in heating, ventilating, and air conditioning systems. These valves are designed especially for flow control in hydraulic systems with high temperatures and pressures, such as district heating systems. It can also be used in combination with M31C150 (heating) actuators as well as with M41A15 (domestic hot water) actuators. Tehnical data: • Action: valve is closed by its spring • Nominal pressure rating: PN25 • Rangeability: 50:1 • Leakage rate: max. 0.05% of kVS • Characteristic: split characteristic / linear - equal percentage • Stroke: 6.5 mm • Close-off pressure: 0...1600 kPa with 300 N actuator; 0...2500 kPa with 400 N actuator • Valve body: • End connections: external thread per ISO 228/1 • Material: red bronze (DIN 1705) • Trim: • Seat: stainless steel (W.-No. 1.4305) • Plug: stainless steel (W.-No. 1.4305) • Stem: stainless steel (W.-No. 1.4305) • Packing: EPDM, O-ring • Medium: water; glycol/water mixture (max. 50% glycol per VDI 2035) Medium temperature: 2...130 °C