Danfoss VS2 DN20 reguliavimo vožtuvas
- DN: 20 (Rp 3/4" female thread)
- Kvs: 6.3 m³/h
- PN: 25 bar
- Temperature: 2 → 150 °C
Applications
Medium-load heating loops in multi-unit residential and small commercial substations, DHW branches with higher flow. Kvs 6.3 fits flows up to ~80-100 kW (ΔT 20 °C, Δp 0.3 bar). Paired with AMV 435 driven by ECL Comfort. Delivery across the EU.
Technical specifications
| Parameter | Value |
|---|---|
| Code | 065F2120 |
| Type | Two-way seat control valve |
| DN | 20 |
| Kvs | 6.3 m³/h |
| PN | 25 bar |
| Connection | Rp 3/4" female thread |
| Temperature | 2 → 150 °C |
| Media | Heating water, glycol up to 50 % |
| Stroke | up to 15 mm |
| Characteristic | Equal percentage |
| Leakage class | IV (0.05 % Kvs) |
| Body material | Red bronze |
| Compatible actuators | AMV 20, AMV 25, AMV 30, AMV 435 |
Sizing
Q = Kvs × √Δp; P = Q × ΔT × 1.163. Example: Δp 0.3 bar → Q ≈ 3.45 m³/h; ΔT 20 °C → P ≈ 80 kW.
Notes for the designer
Valve authority β ≥ 0.5 — size by design flow and loop Δp, not by DN. With an AVP differential-pressure controller VS2 keeps stable control independently of neighboring branches.
DN20 vs DN15/DN25 — when to choose
- Heat load 30-100 kW at design Δp
- DN15 Kvs 2.5 would give excessive Δp across the valve
- DN25 Kvs 10 would yield too-low authority — poor control
B2B delivery and logistics
- Delivery across the EU (from warehouse in Vilnius, LT)
- Competitive B2B pricing
- 30-day payment terms for companies
- Free consultation on valve sizing
Official Danfoss catalog: store.danfoss.com/065F2120
FAQ
Which actuator?
AMV 435 by default. AMV 20/25/30 for 3-point control.
Compatible with the VS2 DN20 Kvs 4.0 version?
Same physical connection (Rp 3/4"), different Kvs. Choose per design flow.
VS2 vs VF/VFS?
VS2 has simpler construction and PN 25 bar. VF/VFS offer higher Kvs and flanged connections from DN25 upwards.
