| ■ Laser Semi-Welded Module |
| •Background |
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In the past no satisfying solution was offered using gasketed plate heat |
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exchangers for special process conditions or aggressive media. |
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The limitation was always the gasket material. For this reason, the |
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complete ThermoLine-plate heat exchanger program was also made |
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available in a laser welded configuration. Thus, a new field of |
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application was opened for special process conditions, also taking into |
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account environmental and safety requirements. |
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| •Advantages |
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•Compact design, low weight. |
•High flexbillty. |
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•Quick and low cost installation.
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•Low hold-up volume. |
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•Excellent heat transfer coefficient. |
•High corrosion resistance. |
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•Minimm risk for leakages. |
•Flexible capacity extension. |
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•Gasketed heat transfer surface easy to clean. |
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| •Working Principle |
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Two heat exchanger plates are welded together to a gas-tight module by means of laser technology .By doing this, a |
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flow channel for the aggressive (or the gasket attacking media) is built, which is hermetically closed to the outside. |
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Only two ring gaskets, made of high resistant material located in the port holes between two welded modules, are in |
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contact with the aggressive media. |
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The other flow channel for the non-aggressive media is sealed by various elastomer gaskets, depending on the |
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individual application. The gaskets are normally fixed without the need for glue but are also available in the glued-on |
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version. Interleakage between the two media is prevented by a double weld, and a double ring gasket in the port |
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holes. If a leakage occurs for any reason, the leak will be external and easily detected. |
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In spite of the use of welded modules, the proven flexibillty of plats heat exchangers is maintained. By adding or |
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changing modules, the heat exchanger capacity can be adjusted to the individual requirements. |
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The laser welded modules can be used for temperatures from -40oC + 170oC, and for pressures up to 25 bar. |
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| •Plate Structures |
PLATE TYPE |
CORRUGATION DEPTH tp (mm)
PLATE THICKNESS S (mm)
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CORRUGATION ANGLE A |
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Power Line PL |
2...2.5 |
0.5...0.8 |
30° |
- |
Standard Line SL |
3.5...4 |
0.5...0.8 |
30° |
60° |
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| • Laser Semi-Welded Plate Types |
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Plate type TL
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90 |
150 |
400 |
250 |
500 |
650 |
850 |
Port hole (DN)
|
40 |
40 |
80 |
100 |
100 |
200 |
200 |
Length (mm)
|
721 |
981 |
1383 |
1014 |
1495 |
1495 |
2034 |
Width (mm)
|
244 |
244 |
369 |
437 |
437 |
586 |
586 |
| Length / Width |
2.95 |
4.02 |
3.75 |
2.32 |
3.42 |
2.55 |
3.47 |
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| •Laser Semi-Welded in R22 / R134a |
| Refrigeration Application |
R22 / R134a |
TEMPERATURE RANGE |
GASKET MATERIAL |
Evaporator |
-30°C to -20°C
> -20°C |
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Condenser |
< 130°C |
CR-HT |
Desuperheater |
< 130°C |
CR-HT |
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| •Laser Semi-Welded in NH3 Refrigeration |
| Application |
Ammonia |
TEMPERATURE RANGE |
GASKET MATERIAL |
Evaporator |
-40°C to -20°C
> -20°C |
| NBR-LT / CR-LT |
| CR-NT / CR-HT |
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Condenser |
< 130°C
130°C to 150°C |
CR-HT
HNBR |
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Oil Cooler |
< 110°C
110°C to 150°C |
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| •Laser Semi-Welded Plate Material |
STANDARD MATERIALS |
THICKNESS |
1.4301( AISI304 )
1.4404( AISI316L )
1.4571( AISI316Ti ) |
0.5mm∼0.8mm |
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| •Laser Semi-Welded Plate Material |
SPECIAL MATERIALS |
THICKNESS |
1.4529
1.4539(UNS N08904)
1.4541(AISI 321)
1.4547(SMO 254)
2.4068 Alloy 201
2.4602 Hastelloy C-22
2.4610 Hastelloy C-4
2.4819 Hastelloy C-276
2.4858 Alloy 825
3.7025 Titanium Gr.1 |
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0.6mm ∼ 0.8mm |
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Gasket Plate Heat Exchanger 
