Our line of Schmidt SIGMAWIG all-welded plate heat exchangers represents the most compact, rugged and cost-effective means of transferring heat in many industrial applications.
Built entirely without gaskets or with an O-ring type gasket between the all-welded plate pack and frame, they provide exceptional corrosion resistance. The exchanger features corrugated plates that produce highly turbulent flow in a true counter-current flow. The result is high efficiency in a very compact design. Due to the smaller size and reduced material content, welded plate heat exchangers can be the most economical heat transfer choice.
Reduced Liquid Volume
The standard design has all piping connections located on one end of the heat exchangers. This simplifies installation and maintenance costs. Many times, the piping alone is all that is required to adequately support the heat exchanger, thus eliminating support considerations and labor costs in packaged equipment.
API Heat Transfer welded plate heat exchangers have narrow flow channels and reduced liquid volume needs. Due to their efficiency, they can be selected to use less coolant.
Reliable Heavy-Duty Construction
The exchanger design features plates with computer-designed corrugations in a "chevron pattern" that is alternated from plate to plate. This leads towards strong and simplified construction. There are two options to connect the welded plate pack to the pressure frame. The plate pack connections are welded to the nozzles with a specially designed compensator allowing for frequent temperature fluctuations. Another solution to withstand sudden temperature gradients is to link the plate pack to the pressure frame using a standard O-ring seal in materials such as EPDM or by a special high resistant material like Viton or Kalrez. All other gaskets are elliminated.
-40°C - 300°C
Vacuum to 35bar
up to 50m³/h
DN 25 to DN 150 studded or flanged
AISI 304 Stainless Steel (1.4301)
AISI 316L Stainless Steel (1.4404)
AISI 904L Stainless Steel (1.4539)
Nickel Alloy, Ti, and Ti-Pd Alloy
Painted Carbon Steel, or Stainless Steel
AISI 316TI (1.4571)
Nickel alloys, Titanium
Codes and Standards
ASME, PED, GOST, GB
Sigmawig Series Numbers
SigmaShell Series Numbers
- SIGMASHELL SP 3
- SIGMASHELL SP 5
- SIGMASHELL SP 7
- SIGMASHELL SP 9
- SIGMASHELL SP 12