Siemens VXI46 3-Way Zone Valve, Female Thread, PN16
Siemens VXI46 Internally Threaded 3-Way Zone Valve PN16
The Siemens VXI46 series are 3-way zone valves with internal thread connection. In sizes DN15–DN25 with kvs values of 2.15–5 m³/h, they are used for mixing or diverting (bypass) control in fan coil, radiator group, underfloor heating zone and small air handling unit circuits. Body material: brass. Medium temperature range is 1…110 °C.
The valve body does not work on its own: an actuator is mounted on it, and the actuator is controlled by a room thermostat or a building automation system. The list below shows the actuators verified for this series according to Siemens compatibility data.
Models and order codes
| Model | DN | kvs | PN | Connection | Stroke | Order code |
|---|---|---|---|---|---|---|
| VXI46.15/2 | DN15 | 2,15 m³/h | PN16 | Rp ½" | 2.5 mm | S55249-V109 |
| VXI46.20/2 | DN20 | 3,5 m³/h | PN16 | Rp ¾" | — | S55249-V110 |
| VXI46.25/2 | DN25 | 5 m³/h | PN16 | — | — | S55249-V111 |
Technical specifications
| Specification | Value |
|---|---|
| Number of ways | 3 |
| Connection type | Internal thread |
| Body material | Brass |
Compatible products
- Siemens STA Thermal (Thermoelectric) Valve Actuator — STA161.65L10, STA321.65L10
- Siemens SUA21/3 Electromotive Zone Valve Actuator 230 V — SUA21/3
- Siemens GDB / GLB Rotary Actuator for Ball Valves 5–10 Nm — GDB341.9E
This list is verified compatibility information based on Siemens product matching data; it is not a list of similar-product suggestions. You can make the final selection with our engineering team based on your project conditions (differential pressure, stroke, control signal).
Selection and installation notes
- The kvs value is selected according to the required pressure drop across the valve at the design flow rate; an oversized kvs reduces control quality.
- When selecting the actuator, choose an actuating force suited to the valve's stroke and close-off differential pressure.
- For glycol-water mixtures or special media, verify the valve's media compatibility in the datasheet.
Technical documents
You can find them on the manufacturer's website by searching for the Siemens document number:
- A6V10432003 — Datasheet (English)
- A6V10432011 — Datasheet (German)
- A6V10425171 — Datasheet (English)
- A6V10432013 — Datasheet (English)
- A6V16098211 — Environmental product declaration (EPD) (English)
For the right model selection and wholesale or project pricing, contact the Novus Energy engineering team on our WhatsApp line.