HRS DTI Series: Industrial double tube heat exchanger.
The DTI type heat exchanger is a double tube heat exchanger (tube within a tube). The inner tube is corrugated for increasing
the heat transfer. The product flows through the inner tube and the service fluid through the annulus between the inner
and outer tube. Because of its geometry, the DTI heat exchanger is a true counter current heat exchanger. An expansion joint
(bellow) is fitted in the shell to allow for differential expansion of the inner and outer tube during operation.
Applications.
Due to the interior cross section, the HRS DTI Series heat exchangers are suited for:
- Fluids containing fibers or other solids.
- Fluids of low to high viscosities and non Newtonian fluids.
Materials.
- Shell side: AISI 304 stainless steel.
- Tube side: AISI 316L stainless steel.
Connections.
- Shell side: DIN flange.
- Tube side: DIN flange.
Finishing.
- Shell side: Externally matt.
- Tube side: Unpolished.
Design conditions.
- Shell side: 10 barg / 185 °C.
- Tube side: 10 barg / 185 °C.
An expansion bellow is fitted in the outer shell for absorbing the differential expansion between the shell and the inner
tube.
For large duties, multiple units can be interconnected and mounted in a frame.
| Model | Length (m) | Area (m2) | Shell side connection | Tube side connection | Max flow shellside (m3/hr) | Max flow tubeside (m3/hr) | Volume shellside (l) | Volume tubeside (l) |
|---|
| DTI 51/25 | 3,0 - 6,0 | 0,4 | DN40 | DN15 | 13 | 4 | 8,2 | 2,5 |
| DTI 64/38 | 3,0 - 6,0 | 0,6 | DN40 | DN25 | 17 | 10 | 10,3 | 5,7 |
| DTI 76/51 | 3,0 - 6,0 | 0,9 | DN40 | DN40 | 18 | 18 | 14,1 | 11,0 |
| DTI 104/64 | 3,0 - 6,0 | 1,1 | DN65 | DN50 | 43 | 29 | 29,7 | 16,9 |
| DTI 104/76 | 3,0 - 6,0 | 1,3 | DN65 | DN65 | 33 | 41 | 21,5 | 24,8 |
| DTI 129/104 | 3,0 - 6,0 | 1,8 | DN80 | DN80 | 37 | 77 | 26,0 | 46,4 |
| DTI 168/129 | 3,0 - 6,0 | 2,4 | DN100 | DN100 | 55 | 120 | 45,4 | 73,6 |
The surface area and volumes shown are for 6,0 meter lengths models.