Higher-load heating loops, multi-unit substation mains, higher-flow DHW sections. Kvs 10 fits design flows up to ~150 kW. Beyond that use VM2 DN25/32/40 or VFS. Delivery across the EU.
| Parameter | Value |
|---|---|
| Code | 065F2125 |
| Type | Two-way seat control valve |
| DN | 25 |
| Kvs | 10 m³/h |
| PN | 25 bar |
| Connection | Rp 1" female thread |
| Temperature | 2 → 150 °C |
| Media | Heating water, glycol up to 50 % |
| Stroke | up to 15 mm |
| Characteristic | Equal percentage |
| Compatible actuators | AMV 20, AMV 25, AMV 30, AMV 435 |
Q = Kvs × √Δp; P = Q × ΔT × 1.163. Example: Δp 0.3 bar → Q ≈ 5.48 m³/h; ΔT 20 °C → P ≈ 127 kW.
Verify authority β ≥ 0.5 before choosing DN25. If design flow is less than 50 % of Kvs, the valve is oversized — use DN20 instead.
Official Danfoss catalog: store.danfoss.com/065F2125
VS2 DN25 Kvs 10 has a single-stage characteristic at PN 25. VM2 DN25 offers higher Kvs (16) for larger flows.
AMV 435 (400 N) — sufficient up to Δp 4-5 bar. Higher Δp calls for AMV 55.