Semi-Welded Plate

Schmidt® SIGMADUAL Semi-Welded Plate Heat Exchangers

API Heat Transfer SIGMADUAL semi-welded plate heat exchangers feature plates that are welded using advanced laser welding techniques. Two plates are welded together and can be fitted with a Viton® O-Ring and/or Teflon® gasket liner. The resulting plate pack has every other plate fully serviceable, while maintaining integrity of the welded plate pair. This is especially suitable for critical fluids and gases, such as ammonia or caustic process chemicals where fluid loss is not acceptable. In the case of ammonia refrigeration, the reduced volume results in significant savings.

*Teflon is a registered trademark of E. I. du Pont de Nemours and Company Semi-Welded Plate Pair with *Teflon Gasket

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Applications

  • Industrial Markets
  • Automotive plants
  • Oil and Gas
  • Process Industries
  • Chemical
  • Metal processing
  • Petrochemical
  • Refrigeration
  • Wastewater treatment
Temperature-40°F - 320°F (-29°C - 200°C)
PressureVacuum to 460 psig (35bar)
Capacitiesup to 3500 GPM (2000m³/h)
Connections3" to 14"- Studded or Flanged
Plates
StandardAISI 304 (1.4301), AISI 316L (1.4404), AISI 316Ti (1.4571)
ExoticsAISI 904, SMO 254, Nickel Alloy, Ti, and Ti-Pd Alloy
Thickness0.6 mm to 0.8 mm
Gaskets
StandardNitrile Rubber Gasket, EPDM Rubber, Chloroprene Rubber
ExoticsHNBR, NBR-HT, FPM/FKM, Butyle, PTFE coated (SIGMACOAT),Food Industry Certified Gaskets
Attachment MethodSIGMAFIX Adhesive-free Gasket, or Glued Gasket
FramePainted Carbon Steel
Connections
StandardStudded with optional 304/316 liner, flange, FPT
ExoticsTi, SMO, Hastelloy, and 904L
Codes and StandardsASME, PED, ABS, LRS, GL, BV, GOST

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