DH1S Danmuff metal expansion joint
Shop links for mobile
Click image to enlarge
| Item | Description |
|---|---|
| 1 | Bellows |
| 2 | Outer casing / shroud |
| 3 | Internal liner |
| 4 | Cone section |
| 5 | Stop ring |
| 6 | Guide ring |
| 7 | Torsion protector |
| 8 | Media / line pipe |
DH1S Danmuff
metal expansion joint
Features
- Untied metal expansion joints mainly for district heating applications.
- External shroud with torsion protection, for district heating.
- Can be installed in series.
- Designed for large axial movements.
Advantages
- No significant pressure drop - reduced need for pumps and general power consumption for moving media, compared to pipe loops.
- Less space required around the joint - compared to pipe loops.
- Less supporting structure required – compared to pipe loops.
- Lower erosion rate (for abrasive media lines – compared to pipe loops with elbows).
- Multiply bellows with low spring rate and high cycle life.
Operating range
Diameter: DN 40 ... DN 600 (1.75" ... 24”)
Temperature: ... 120 °C (248 °F)
Pressure: 16 barg (232 PSIG), 25 barg (362 PSIG)
Materials
- Bellows: 1.4541 (AISI 321)
- Connections: 1.0345 – (P235GH)
Other materials are available on request.
Standards and approvals
Design code:
EJMA, 1,000 Cycles
NDT and documentation:
Can be provided per customer request e.g.,
material certificates and NDT test reports.
Recommended applications
- Power plant technology
- Building services industry
- District heating & cooling
- Water cooling systems
- Air and steam transport lines
Notes
Custom designs and sizes are available on request. Untied metal expansion joints require guide and support. DH type expansion joints are delivered 100 % preset (extended) using shear bolts, which are activated during startup / first cycle.
