Siemens VBF21.80 Flanged 3-Way Rotary Valve DN80 PN6
Siemens VBF21.80 Flanged 3-Way Rotary Slipper Valve DN80 PN6
The Siemens VBF21.80 is a flanged 3-way rotary slipper valve with pressure rating PN6. With size DN80 and a kvs value of 100 m³/h, it is used in boiler circuits, mixing circuits and return temperature boost applications. Body material: cast iron EN-GJL-250. Medium temperature range is 1…120 °C.
The valve is motorized with the SAL31.00T10 rotary actuator and the ASK31N mounting kit.
Ordering information
| Model | DN | kvs | PN | Order code |
|---|---|---|---|---|
| VBF21.80 | DN80 | 100 m³/h | PN6 | BPZ:VBF21.80 |
Technical specifications
| Specification | Value |
|---|---|
| Nominal size (DN) | DN80 |
| Pressure rating (PN) | PN6 |
| kvs value | 100 m³/h |
| Number of ways | 3 |
| Connection type | Flanged |
| Body material | Cast iron EN-GJL-250 |
| Rotation angle | 90° |
| Medium temperature | 1…120 °C |
| Valve characteristic | Linear |
| Medium type | Hot water |
Compatible products
- Siemens SAL31.00T10 Rotary Valve Actuator 10 Nm, 230 V — SAL31.00T10
- Siemens ASK31N Rotary Valve Mounting Kit (for SAL…T10) — ASK31N
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:
- A6V10964787 — Data sheet (English)
- A6V10331088 — Mounting instructions (German)
- A6V10341182 — 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.