Gasket materials, exchangers

Table 12.8. Typical gasket materials for plated heat exchangers...

Table 12.8. Typical Gasket Materials for Plated Heat Exchangers...

Swider, K. E. and Rolison, D. R. (2000) Reduced poisoning of platinum fuel-cell electrocatalysts supported on desulfurized carbon. Electrochem. Solid-State Lett. 3,4-6 Tandon, R. and Pintauro, P. N. (1997) Divalent/monovalent cation uptake selectivity in a Nafion cation-exchange membrane experimental and modeling studies. J. Membr. Sci. 136, 207-219 Tan, J., Chao, Y. J., Van Zee, J. W. and Lee, W.-K. (2007) Degradation of elastomeric gasket materials in PEM fuel cells. Mater. Sci. Eng. A, 445-446, 669-675 Tawfik, H., Hung, Y. and Mahajan, D. (2(X)7) Meted bipolar plates for PEM fuel cell - A review. J. Power Sources 163, 755-767... 

A gasketed plate heat exchanger is usually significantly cheaper than a shell-and-tube heat exchanger for the same duty. This is especially the case if the shell-and-tube heat exchanger must be fabricated in more expensive materials such as stainless steel. 

The principal use of ethylene-propylene rubbers (ethylene-propylene-diene monomer (EPDM) or ethylene-propylene monomer (EPM) types) is in the manufacture of heat exchanger gaskets. When cured using peroxides, these materials can be used for extended periods at up to 150 °C. Normal conditions of service are high temperatures (<130 °C) and flow or static exposure to aqueous food. 

Figure 6.4. Gasketed plate and frame and double pipe heat exchangers, Time base mid-1998. Purchased cost = (bare cost from figure) x Material factor...

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