Wilk GraphiteGraphite Shell and tube heat exchangers, modular blocks and Cubic block heat exchangers are all competitively priced from Coidan Graphite Products. David Coidan has spent 25 years being involved in the design and manufacture of graphite heat exchangers and he will be pleased to be of assistance. We at Coidan Graphite work in partnership with Wilk Graphite to provide cost effective graphite heat exchangers and spares within the UK. Coidan Graphite – Corrosion Resistant Equipment for the CPI
Nantong Sunshine Graphite Equipment Technology Co. Ltd The impregnated graphite process equipment is produced by Nantong Sunshine Graphite Equipment Technology Co. Ltd, who is a market leader in China for impregnated graphite parts. Graphite equipment and heat exchangers have been manufactured by Sunshine since 1995. In addition to the production of high quality equipment Sunshine has developed its own research and technical engineering department, mainly focusing on acid recovery processes and HCL synthesis units. ISO - Certificate International Standards References Guarantee Impregnated Graphite
 CARBEX BF3 – Microphotograph of grain structure
Graphite made in China by Nantong Sunshine has a particle size of only 0,2 or 0,8 mm and a low surface roughness. The result is an excellent mechanical strength, thermodynamical performance and low fouling.
Block Heat Exchangers - Cylindrical Blocks
Both sides of the heat exchanger may be corrosion resistant, with different shell materials like stainless steel, rubber lining or other materials. Block heat exchangers are used for many applications because of their safe and robust operation. The compact design offers low space requirement and the modular construction allows easy maintenance, cleaning and supports the adaption of the units for changing process conditions. The Block heat exchanger are available in 2 different designs. The major difference of the type XYK and the type YKA is the way the service medium is distributed through the blocks.
Service
Applications
Columns and Column Internals
Columns and internals are available up 3000 mm diameter. Columns and column internals are designed individually according to the process conditions. Many different forms and designs result from the multitude of design solutions, therefore, we can only show some options here and we ask for your individual data which will allow us to design the most cost effective solution. 
Support grids Support grids are used in columns to support packing made of various materials suitable for the given process. The construction follows the maximum allowable flow rate, the required load and the size of the packing. It may either be flanged in between two column sections, or seated on a support ring. Liquid distributor Distributors for liquids are usually individually designed to match the process conditions. We aim to evenly distribute the process liquid and at the same time allow the gases to contact and pass with low pressure drop. Accordingly the distributors can be a multitude of different designs. Graphite columns Columns made of graphite up to a diameter of 3000 mm are manufactured and designed according to individual process conditions.
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Coidan Graphite stands for first class graphite equipment from one of the largest graphite heat exchanger producers.We provide technical service, an international network and the ability to serve our clients with high quality products. Coidan Graphite represent Wilk Graphite in the UK, a company that has been in the field of corrosion protection for many years.
The cylindrical block heat exchanger is based on round graphite blocks which may reach diameters of up to 1400 mm. It has pass way drillings for the product and the service medium. The size of the drilling varies according to the properties of the media from 10 to 24 mm. The hole sizes are optimised to achieve best results for each liquor. The individual blocks are sealed with PTFE gaskets against each other and the whole package is fastened by springs to compensate for thermal expansion. The sealing system works in the temperature range of the unit and has been established for many years. By innovative baffle positioning the service media can flow at the optimum velocity (to balance the thermal efficiency against allowable pressure drop.
Benefits
Graphite Column internals, support grids and liquid distributors are frequently used in packed columns. Graphites low weight, inert nature and easy machineability allows bespoke designs for many different processes.
