Siemens VAI61 2-Way Control Ball Valve, Female Thread, PN40
Siemens VAI61 Internally Threaded 2-Way Control Ball Valve PN40
The Siemens VAI61 series are 2-way ball valves with a DZR (dezincification-resistant) brass body and internal thread (Rp). In sizes DN32–DN50, with kvs values of 16–63 m³/h and pressure rating PN40, they are used for modulating flow control in heating, cooling and air conditioning circuits. Valve characteristic: equal-percentage. Medium temperature range is -10…120 °C.
The quarter-turn (90°) ball valve is driven directly by Siemens GDB/GLB rotary actuators; on/off (2/3-position) or DC 0…10 V modulating control depends on the actuator selected. Compatible actuators are listed below.
Models and order codes
| Model | DN | kvs | PN | Connection | Order code |
|---|---|---|---|---|---|
| VAI61.32-16 | DN32 | 16 m³/h | PN40 | Rp 1¼" | BPZ:VAI61.32-16 |
| VAI61.50-63 | DN50 | 63 m³/h | PN40 | Rp 2" | BPZ:VAI61.50-63 |
Technical specifications
| Specification | Value |
|---|---|
| Number of ways | 2 |
| Connection type | Internal thread |
| Body material | DZR brass |
| Rotation angle | 90° |
| Medium temperature | -10…120 °C |
| Medium type | Water |
| Valve characteristic | Equal percentage |
Compatible products
- Siemens GDB / GLB Rotary Actuator for Ball Valves 5–10 Nm — GLB161.9E, GLB341.9E
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:
- A6V10218248 — Datasheet (English)
- A6V10218242 — Datasheet (German)
- A6V11484534 — Data sheet (German)
- A6V10339710 — Datasheet (English)
- A6V10932088 — Test report (EN 10204) (German)
For the right model selection and wholesale or project pricing, contact the Novus Energy engineering team on our WhatsApp line.