The new Silicon Carbide Shell and Tube Heat Exchangers Flowsic ® with triple steel tube plates (patent pending) have been designed taking into consideration every detail according to hi-tech standards. Silicon carbide's thermal conductivity is similar to graphite's and much greater than other corrosion-resistant materials as glass, compound special alloys, noble metals.

Wide range of materials

Depending on the process, the circulating fluids and the working conditions, the shell can be made in glass-lined steel, 304L or 316L stainless steel, zinc plated CS or E-TFE lined steel. Acid fluids can circulate either inside or outside the Silicon Carbide tubes.

Excellent Chemical Resistance with Hexoloy ® SA

Hexoloy ® SA is a fine-grain ceramic composed of micro-particles of silicon carbide (8 micron) that is inert to all known chemicals up to 205°C (400°F). The corrosion resistance of Hexoloy ® SA SiC permits superior performance in environments of hot gases and liquids including strong acids and bases, even at extremely high temperatures. Hexoloy ® SA has been proven for years in HF, bromine, high concentration nitric, mixed acid, bases, oxidant and chlorinated organics. Hexoloy ® SA is a basically pure silicon carbide with no free silicon, as it may react with the products it comes into contact with.

High thermal conductivity

Silicon carbide's thermal conductivity is similar to graphite's and much greater than other corrosion-resistant materials (PTFE, glass, compound special alloys, noble metals). This implies better efficiency, less exchange area and space needed.

Flowsic ® - a new concept of sealing with the Triple Tube Plate

The main tube plate is made of AISI 304L/ PFA lined to ensure the utmost protection against corrosive media. Each SiC tube is fitted with a sealing arrangement composed of double O-rings (Kalrez ® and
Viton ® ), distance ring and push sleeve contained in the secondary plate. The packages are simultaneously pressed on the seats using a tertiary plate. This sealing design (patent pending), ensures an unequalled and safe double seal on each end of the silicon carbide tubes.

More advantages of silicon carbide

• excellent resistance to erosion (silicon carbide is 50% harder than tungsten carbide)
• superb wear resistance and total impermeability at extreme temperature and pressure
• exceptional purity: Hexoloy ® contains no binders or fillers meaning that is basically pure silicon carbide
• outstanding mechanical properties: each tube is tested at 186 bar (2700 psi)

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