Special Products · GAB Neumann
Annular Groove Graphite Heat Exchangers
GAB Neumann annular groove heat exchangers heat or cool highly corrosive liquids — hydrochloric and sulphuric acid, halogenated solvents — in fused, gasket-free impervious graphite. Made in Germany by GAB Neumann, a member of the Mersen group.
GAB Neumann · Mersen · Maulburg, Germany
Authorised distributor in Thailand — selection, supply and on-site service. Official site: mersen.com ↗
Product range
Models we supply
Each card links to the GAB Neumann page for curves, dimensions and options.
Series
RA series
Corrosion resistant on one side: the corrosive product in graphite, a non-corrosive utility such as cooling water, steam or thermal oil on the other.
−1/+6 (+10) bar · −30 (−60) to +180 (+200) °C
WA series
Corrosion resistant on both sides: heat transfer and heat recovery between two corrosive liquids.
−1/+6 (+10) bar · −30 (−60) to +180 (+200) °C
Sizes — data sheet RN-12
RA/WA-7.4
Smallest disc, for small duties.
2–8 discs · 0.6–2.8 m² · DN 25/50 · H 330–570 mm
RA/WA-7.3
Small and medium duties.
2–10 discs · 1.0–5.5 m² · DN 50/80 · H 370–855 mm
RA/WA-7.2
Medium duties; carbon-fibre reinforced for 6/3 and 6/6 bar.
2–16 discs · 1.6–15.2 m² · DN 50/80 · H 430–1,735 mm
RA/WA-7.1
Largest standard disc; carbon-fibre reinforced for 6/3 and 6/6 bar.
2–30 discs · 2.0–34.5 m² · DN 50/80/100 · H 470–3,685 mm
How it is built
Fused graphite discs
Grooves machined into impervious graphite discs, fused into one stack — no gaskets, no leak paths.
GAB GPX1 / GPX1T · GPX2 low resin
Spiral or wavy groove
1 to 21 parallel grooves in three widths; the optional wavy groove adds turbulence.
Self-cleaning · resists fouling
Process and service channels
Product and utility run in separate groove channels; heat passes through the graphite wall.
Graphite nozzles on both sides
Tie rods and helical springs
Pressure plates, stainless tie rods and springs take up the thermal expansion of the stack.
Carbon steel or stainless pressure plates
Applications
Typical duties
- Heating or cooling hydrochloric and sulphuric acid
- Halogenated solvents
- Thermal oil heating of corrosive products
- Heat transfer and heat recovery between two corrosive liquids
- Feed preheater for a column sump
- Biofuel production (wavy groove)
Design
Materials & standards
- Phenolic resin-impregnated graphite GAB GPX1 / GPX1T; GPX2 with low resin content (optional)
- Pressure plates and flanges: carbon steel (stainless optional); tie rods, nuts, springs: stainless steel
- AD 2000 Merkblatt / PED 2014/68/EU, or ASME Code
- Options: carbon-fibre reinforcement, ATEX version
- Resin-free surfaces — no black particle release
Downloads
Brochures & documents
- Product information RA/WA (RN-12)PDF
- Data sheet RA/WA (RN-12) — sizes and dimensionsPDF
- Mersen heat exchangers brochurePDF
- 3D animation of the annular groove heat exchangerWEB
- Product page at mersen.comWEB
Product information and images: GAB Neumann — mersen.com. Downloads open the manufacturer's own files.
Related
Related products
Talk to an engineer
Send us your duty
Medium, flow, head, temperature and pressure — we select the right model and quote from Bangkok or Rayong.