Siemens VFW41.250 Wafer-Type Butterfly Valve DN250
Siemens VFW41.250 Wafer-Type Butterfly Valve DN250
The Siemens VFW41.250 is a wafer-type butterfly valve with a ductile iron body. In size DN250 with a kvs value of 4,550 m³/h, it is used for shut-off and control in chillers, cooling towers, main distribution and large heating lines. Medium temperature range is -20…120 °C. The wafer-type body is clamped between two flanges; it is a compact, lightweight solution.
90° rotary valve; can be motorized with SQL341 series butterfly valve actuators.
Ordering information
| Model | DN | kvs | PN | Order code |
|---|---|---|---|---|
| VFW41.250 | DN250 | 4.550 m³/h | PN6 | S55235-V146 |
Technical specifications
| Specification | Value |
|---|---|
| Nominal size (DN) | DN250 |
| Pressure rating (PN) | PN6 |
| kvs value | 4.550 m³/h |
| Connection type | Flanged |
| Body material | Ductile iron EN-GJS-400-18-LT |
| Rotation angle | 90° |
| Medium temperature | -20…120 °C |
| Medium type | Water-glycol mixture |
Compatible products
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:
- A6V12677477 — Datasheet (English)
- A6V101089189 — Datasheet (German)
- A6V12649797 — Mounting instructions (German)
- A6V11918391 — EU declaration of conformity (German)
- A6V12692262 — EU declaration of conformity (English)
- A6V16250460 — 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.