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 is serviceable every other plate, whilst maintaining the integrity of a 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.
Specifications
Operating Parameters
Temperature:
Pressure:
Capacities:
Connections:
-29°C - 200°C
Vacuum to 35bar
up to 2000m³/h
DN80 to DN350 - Studded or Flanged
Technical Parameters
Plates
Standard:
AISI 304 (1.4301)
AISI 316L (1.4404)
AISI 316Ti (1.4571)
Exotics:
AISI 904
SMO 254
Nickel Alloy, Ti, and Ti-Pd Alloy
Thickness:
0.6 mm to 0.8 mm
Gaskets
Standard
Nitrile Rubber Gasket, EPDM Rubber,
Chloroprene Rubber
Exotics:
HNBR, NBR-HT, FPM/FKM, Butyle, PTFE coated (SIGMACOAT),
Food Industry Certified Gaskets
Attachment Method
SIGMAFIX Adhesive-free Gasket, or Glued Gasket
Frame
Painted Carbon Steel
Connections
Standard:
Studded with optional 304/316 liner,
flange, FPT
Exotics:
Ti, SMO, Hastelloy, and 904L
Codes and Standards
ASME, PED, ABS, LRS, GL, BV, GOST
*Teflon Gasket
SigmaDual Series Numbers
- SIGMADUAL M 25
- SIGMADUAL M 35
- SIGMADUAL M 106
- SIGMADUAL M 136
- SIGMADUAL M 156
- SIGMADUAL M 229