Danfoss AF-range impulse tube set (OEM designation "Impulse tube set AF G1/4, fi10x1,5m"). The impulse tubes connect the diaphragm chamber of a Danfoss self-acting AF-range pressure/flow controller actuator to the pressure-sensing tapping(s) on the pipework, transmitting the pipe pressure to the actuator so it can hold the set differential pressure or flow. This set is matched to the AFP(Q)/B controller. Tube outer diameter 10 mm; union connection G 1/4; material Copper CW 024A. Permissible medium: District heating/cooling circulation water. OEM P/N 003G1391. EAN 5702421812419. Technical data quoted verbatim from store.danfoss.com (code 003G1391).
| Code number | 003G1391 |
| Type | Impulse tubes |
| Product group | Accessories - SAC |
| Gross weight | 0.574 Kilogram |
| Net weight | 0.433 Kilogram |
| Volume | 3.538 Liter |
| Connection size | G 1/4 |
| Contains batteries | No |
| Description | Impulse tube set AF G1/4, fi10x1,5m |
| Diameter [mm] | 10 mm |
| EU RoHS compliance | Yes with exemptions |
| For product type | AFP(Q)/B |
| For valve size | Universal |
| Length [mm] | 1500 mm |
| Material | Cooper CW 024A |
| Permissible media | District heating/cooling circulation water |
| REACH Candidate List substances | Lead (CAS no. 7439-92-1) |
| SCIP dossier no. | 7c43cb77-911c-4b9f-aed9-1ac41d81c831 |
| Suitable for valve of diameter [mm] [Max] | 250 mm |
| Suitable for valve of diameter [mm] [Min] | 15 mm |
| EAN | 5702421812419 |
| HS code | 8481.90 |
| Material | Cooper CW 024A |
| Standard size | Impulse tubes |
| Thread standard | G 1/4 |
| MOQ | 1 |
Impulse tubes are ordered to match the controller Type and the valve size/pressure class. This set fits AFP(Q)/B controllers. Confirm the controller Type, valve DN and PN against the AF-range data sheet before ordering — impulse tube length and fittings differ between controller families (AFQ, AFP/AFPB, AFPQ, AFPQ4/AVPQ).