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Applications
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Semi-Welded Module
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Gasket Plate Heat Exchanger
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Laser Semi-Welded Module
Background
In the past no satisfying solution was offered using gasketed plate heat
exchangers for special process conditions or aggressive media. The
limitation was always the gasket material. For this reason, the complete
ThermoLine-plate heat exchanger program was also made available in
a laser welded configuration. Thus, a new field of application was opened
for special process conditions, also taking into account environmental
and safety requirements.
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Advantages
  • Compact design, low weight.
  • Quick and low cost installation.
  • Excellent heat transfer coefficient.
  • Minimm risk of leakages.
  • Gasketed heat transfer surface easy
    to clean.
  • High flexbility.
  • Low hold-up volume.
  • High corrosion resistance.
  • Flexible capacity extension.
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Working Principle
Two heat exchanger plates are welded together to a gas-tight module by means of laser technology .By doing so, a flow channel for the aggressive (or the gasket attacking media) is built, which is hermetically closed to the outside. Only two ring gaskets, made of high resistant material located in the port holes between two welded modules, are in contact with the aggressive media. The other flow channel for the non-aggressive media is sealed by various elastomer gaskets, depending on the individual application. The gaskets are normally fixed without the need for glue but are also available in the glued-on @ version. The leakage between the two media is prevented by a double weld, and a double ring gasket in the port holes. If a leakage occurs for any reason, the leak will be external and easily detected. In spite of the use of welded modules, the proven flexibility of plats heat exchangers is maintained. By adding or changing modules, the heat exchanger capacity can be adjusted to the individual requirements. 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)
CORRUGATION ANGLE A
Power Line PL 2...2.5 0.5...0.8 30X -
Standard Line SL 3.5...4 0.5...0.8 30X 60X
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Laser Semi-Welded Plate Types
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Plate type TL
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 -30XC to -20XC > -20XC
CR-LT
CR-NT / CR-HT
Condenser < 130XC CR-HT
Desuperheater < 130XC CR-HT
Laser Semi-Welded in NH3 Refrigeration
Application
Ammonia TEMPERATURE RANGE GASKET MATERIAL
Evaporator -40XC to -20XC > -20XC
NBR-LT / CR-LT
CR-NT / CR-HT
Condenser < 130XC 130XC to 150XC CR-HT
HNBR
Desuperheater < 130XC 130XC to 150XC CR-HT
HNBR
Oil Cooler < 110XC 110XC to 150XC NBR
HNBR
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Laser Semi-Welded Plate Material
STANDARD MATERIALS THICKNESS
1.4301( AISI304 )
1.4404( AISI316L )
1.4571( AISI316Ti )
0.5mm0.8mm
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
0.6mm 0.8mm
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