Danfoss measuring orifice DN 250 PN 25 — fixed calibrated orifice fitted in the pipe to create a defined pressure drop for flow measurement in hydronic balancing circuits, used with a balancing instrument to read circuit flow. Kvs 1219 m³/h. Suitable for PN 16/25/40 flange systems. OEM designation "Measuring orifice DN250 (PN25)". OEM P/N 003Z2281. EAN 5702421551196. Technical data quoted verbatim from store.danfoss.com (code 003Z2281).
| Code number | 003Z2281 |
| Type | Measuring orifices |
| Product group | Manual balancing |
| Description | Measuring orifice DN250 (PN25) |
| Size | DN 250 |
| Kvs value | 1219 m³/h |
| Pressure class | PN 25 |
| Contains batteries | No |
| EU RoHS compliance | Yes with exemptions |
| China RoHS compliance | Out of scope |
| REACH Candidate List substances | Lead (CAS no. 7439-92-1) |
| Net weight | 6.35 Kilogram |
| Gross weight | 7.35 Kilogram |
| Volume | 4.446 Liter |
| EAN | 5702421551196 |
| HS code | 9026.90 |
| EU RoHS exemption clause | 6(c) |
| Kvs values [m³/h] | 1219 m³/h |
| Pressure rating | PN 25 |
| Standard size | Measuring orifice |
| MOQ | 1 |
Select the orifice by pipe size (DN 250); the Kvs value fixes the flow/pressure-drop relation used to compute circuit flow with a differential-pressure measuring instrument. For large-diameter risers and mains where a measuring balancing valve is not fitted. Confirm DN and flange class before ordering.