VTTB20-4,0 VTTV / VTTR / VTTB - 2-way, 3-way and 3-way (bypass) zone valves DN15-20, kvs 0.25-6.0
Valves for control of heating and cooling in fan-coil or chilled beams applications. The valves are intended to be used together with the thermal RTAN and RTAOM actuators. They are available as 2- and 3-way versions, as well as bypass versions. The valves have linear flow characteristics. The adapter for RTAOM…actuators is delivered with the valve.
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Specifications
| Nominal diameter | DN20 |
|---|---|
| Connection | G3/4" |
| Kvs, A-AB | 4.0 m3/h |
| Kvs, B-AB | 2.5 m3/h |
| Max. diff. pressure | 80 kPa |
| Actuator | RTAN140, RTAOM125 |
| Application | Heating systems, cooling systems, fan-coil units, ventilation systems |
|---|---|
| Pressure rating | PN16 |
| Connection | BSP externally threaded according to ISO 228/1 |
| Flow characteristics | Linear |
| Max. leakage | 0 % of the kvs value |
| Media | Hot water, cold water, glycol-mixed water |
| Media temperature | 2…95°C |
| Stroke | 2.5mm |
| Adapter | Included for RTAOM…actuators. No adapter is needed for RTAN… actuators. |
| Body | Brass CW614N |
| Plug | PA + GF |
| Stem | PA + GF |
| Spring | Stainless steel |
| Packing box | PPO + GP |
| O-rings | FKM |
