Industrietechnik
VFD250-40 VFD2, 2-Way Control Valves with Internally Thread Union Connection, DN15–50
2 way valves, DN15-50, kvs 0.25-40, 20 mm stroke. Designed for control of cold, hot or glycol-mixed water. For use in domestic water systems or district heating within the temperature range -5°C...+150°C. They are pressure balanced (from DN20-50, not DN15) and can therefore handle high differential pressure with low force. The valves are intended to be used together with SE5 actuators.
Specifications
| Connection | Internal G 2" on union end |
|---|---|
| Actuator connection | Standard for RVAN5.../RVAN10... actuators |
| Rangeability | 100:1 |
| Nominal diameter | DN50 |
| Kvs | 40 m³/h |
| Max. diff. pressure | 1600 kPa |
| Media temperature | -5…150 °C |
| Nipple | DZR brass CW511L |
| Valve Type | 2-Way |
| Application | Heating, Cooling, Ventilation, District heating, District cooling |
|---|---|
| Pressure rating | PN16 |
| Connection types | BSP externally threaded according to ISO 228/1 |
| Flow characteristics | Equal percentage |
| Leakage | 0.0 % of Kvs (PTFE gasket, carbon-filled 25 %, no leakage) |
| Media | Hot water, Glycol-mixed water (max. 50 % glycol) |
| Stroke | 20 mm |
| Closing direction | When stem is pushed inward |
| Media temperature | -5…150 °C |
| Body | Gunmetal CC491K |
| Seat | Stainless steel 1.4301 |
| Plug | Stainless steel 1.4305 |
| Stem | Stainless steel 1.4305 |
| Seat packing | PTFE (carbon filled 25 %) |
| O-rings | EPDM |
| Stuffing box | Dezincification resistant brass CW511L |
| Bonnet | Gunmetal CC491K |
| Gasket | EPDM |
| Nut | Galvanized malleable cast iron |
| Fitting seal | Novatec Premium 2, Nitrile bonded aramid fibre with graphite |
Software & documentation
Product sheet
Other documentation