SGL Carbon (SGL Carbon SE): DIABON graphite heat exchangers, columns, pumps and furnace parts

DIABON and SICABON heat exchangers, columns, quenches, pumps and HCl units from SGL Carbon, plus furnace parts in SIGRABOND, SIGRATHERM and SIGRAFINE. Design selection and a quotation for your project.

DIABON shell and tube heat exchangers

DIABON impregnated graphite tubes reach 70 W/mK heat conductivity, and monolithic tubesheets are made up to 1600 mm in diameter. CARBOGUARD carbon fiber reinforcement protects tubes at critical operating conditions. SICABON silicon carbide tube units serve highly oxidizing media.

Tube conductivity 70 W/mK
Tubesheets up to 1600 mm
CARBOGUARD reinforcement
20 bar air test

DIABON block and groove heat exchangers

DIABON block heat exchangers come in standardized cylindrical, cubical and mono-block designs for heating and cooling corrosive media. Groove units are built from machined graphite plates connected by cementing, with no gaskets between the plates. The design lowers the risk of leaks.

Cylindrical blocks
Cubical and mono-block designs
Gasket-free groove units
Cemented graphite plates

DIABON plate heat exchangers

The DIABON plate heat exchanger was developed by SGL Carbon together with Alfa Laval. Four sizes and three materials are available, with modular expansion and corrosive media on both sides, for example in heat recovery. The range includes type P90 and a SICABON plate unit.

Four sizes
Three materials
Type P90
More than 3000 references

DIABON columns and quenches

DIABON graphite columns, reactors and vessels are fully vacuum resistant, rated up to 3 bar and made up to 3500 mm in diameter. POLYFLURON PTFE lining of steel columns handles 16 bar and 250 °C. Graphite quenches with no moving parts treat gases at up to 1600 °C.

DIABON columns up to 3500 mm
Column pressure up to 3 bar
PTFE lining up to 250 °C
Quenches up to 1600 °C

DIABON centrifugal and axial pumps

DIABON type NG centrifugal pumps are designed to ISO 2858 and ISO 5199 and handle corrosive liquids at up to 200 °C. Three standardized mechanical seal sizes and a magnetic drive option are available. For phosphoric acid there are axial flow pumps and pumps in titanium and zirconium.

ISO 2858 and ISO 5199
Media up to 200 °C
Three seal sizes
Magnetic drive option

HCl synthesis and absorption units

Standard hydrochloric acid synthesis units cover 2.0 to 155 t/d of 100 % HCl, with less than 1 ppm free chlorine in the acid. HCl absorption units cover 0.5 to 400 t/d with product concentrations of 25 to 38 %. Systems for phosphoric acid are also available.

Synthesis 2.0 to 155 t/d
Absorption 0.5 to 400 t/d
Free chlorine below 1 ppm
Uptime above 98 %

SIGRABOND and SIGRATHERM furnace parts

For vacuum and inert gas furnaces SGL Carbon makes heating elements and furnace linings in SIGRABOND carbon fiber-reinforced carbon, charging racks and heat shields. Insulation includes SIGRATHERM GFA soft felt for up to 2000 °C and rigid felt for service beyond 800 °C.

SIGRABOND Standard heaters
SIGRABOND Performance racks
Soft felt up to 2000 °C
Rigid felt beyond 800 °C

SIGRAFINE isostatic graphite parts

SIGRAFINE isostatic graphite is pressed in a cold isostatic press and graphitized at roughly 3000 °C, with purity down to below 5 ppm. It is used for heaters, crucibles and heat shields in crystal growing. The SiC coating is applied by CVD at 1200 to 1300 °C.

Purity below 5 ppm
Graphitized at about 3000 °C
SiC coating 100 µm
CVD at 1200 to 1300 °C

How to choose SGL Carbon equipment

Selection starts with the medium and the duty. For corrosive media SGL Carbon makes heat exchangers, columns, reactors and vessels, centrifugal and axial pumps and quenches; the main material is DIABON graphite, phenolic resin impregnated or fluoroplastic bonded.

The Process Technology unit has more than 70 years of experience with such media.

High-temperature furnaces use other ranges: SIGRABOND carbon fiber-reinforced carbon, SIGRATHERM felts and SIGRAFINE isostatic graphite. Material grade, dimensions and design are stated in the quotation for each project.

Graphite heat exchangers

DIABON shell and tube units suit medium to large flow rates: tubes with 70 W/mK heat conductivity, monolithic tubesheets up to 1600 mm and CARBOGUARD reinforcement. Block units come in cylindrical, cubical and mono-block designs, and groove units are built from cemented plates without gaskets.

DIABON plate heat exchangers were developed together with Alfa Laval: four sizes, three materials and corrosive media on both sides. SICABON silicon carbide tube and plate units serve highly oxidizing media.

Columns, quenches and process units

DIABON columns, reactors and vessels are vacuum resistant, rated to 3 bar and made up to 3500 mm in diameter; PTFE-lined POLYFLURON steel columns handle 16 bar and 250 °C. Quenches with no moving parts treat gases up to 1600 °C, and SIGRABOND Chemical column internals work up to 1000 °C.

Standard HCl synthesis units cover 2.0 to 155 t/d, and absorption units cover 0.5 to 400 t/d with product concentrations of 25 to 38 %. Systems for phosphoric acid are also available.

Pumps, rupture disks and expansion joints

DIABON NG centrifugal pumps are designed to ISO 2858 and ISO 5199 for media up to 200 °C, with three standardized mechanical seal sizes and a magnetic drive option. For phosphoric acid there are axial flow pumps and pumps in titanium, zirconium and nickel alloys.

Rupture disks are made of DIABON, PFA, PTFE and SIGRAFLEX foil, and series HT works up to 300 °C. FLUROFLEX expansion joints cover DN 25 to DN 2500, from vacuum to 25 bar and up to 200 °C.

Materials for high-temperature furnaces

SIGRABOND Standard serves heating elements and furnace linings, Performance serves charging racks and Heatshield serves heat shields. SIGRATHERM GFA soft felt works up to 2000 °C in vacuum or inert gas, and rigid felt performs beyond 800 °C.

SIGRAFINE isostatic graphite is graphitized at roughly 3000 °C with purity below 5 ppm. The SiC coating is applied by CVD at 1200 to 1300 °C with a typical film thickness of 100 µm.

The manufacturer

SGL Carbon SE is a German company headquartered in Wiesbaden and founded in 1992, with around 3,800 employees at 27 sites in Europe, North America and Asia.

The Strongsville site in the USA has produced graphite heat exchangers and pumps since 1939 and joined SGL in 1996. POLYFLURON PTFE linings are made by Dr. Schnabel GmbH in Limburg, part of SGL Carbon since 2007.

SGL Carbon and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of SGL Carbon and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.