| Product(s): | Hevacomp Mechanical Designer | ||
| Version(s): | V8i | ||
| Environment: | N/A | ||
| Area: | Netsys | ||
| Subarea: | N/A |
Overview
K values for fittings are considered when pressure drop per meter is calculated for pipe or duct sections.
Pipe fittings
| Fitting name | K value type | Single K value | 15mm | 25mm | 50mm | > 50mm |
| Gate valve | banded | - | 0.5 | 0.3 | 0.2 | 0.1 |
| Globe valve | banded | - | 12.0 | 7.0 | 5.0 | 4.0 |
| Oblique valve | banded | - | 3.0 | 1.8 | 1.3 | 1.0 |
| Offset | banded | - | 3.2 | 3.2 | 2.8 | 2.4 |
| Non-return valve | single | 2.0 | - | - | - | - |
| Butterfly valve | single | 0.3 | - | - | - | - |
| Plug valve | single | 1.0 | - | - | - | - |
| Cock | single | 10.0 | - | - | - | - |
| Diaphragm valve | single | 2.5 | - | - | - | - |
| Strainer | single | 2.0 | - | - | - | - |
| Commissioning set | user defined | - | - | - | - | - |
| Automatic valve | user defined | - | - | - | - | - |
| Radiator/Emitter | user defined | - | - | - | - | - |
Duct fittings
| Fitting name | K value type | Single K value |
| Damper - Normal | single | 0.5 |
| Damper - Streamlined | single | 0.2 |
| Damper - Motorised | single | 0.2 |
| Damper - fire | none | 0.0 |
| Attenuator | user defined | - |
| Heater | user defined | - |
| Cooler | user defined | - |
| Filter | user defined | - |
| Mesh obstruction | single | 1.0 |
| Perforated sheet | single | 2.0 |
| Depression down | single | 0.4 |
| Depression up | single | 0.4 |
| Offset down | single | 0.3 |
| Offset up | single | 0.3 |
| Diffuser | user defined | - |