Cross-baffle, sealing

Figure 28.4 Detail showing portion of longitudinal cross baffle seal strips.

This looks good on paper. But the problem arises in sealing the cross-baffle to the interior of the shell. This is accomplished by means... 

Fig. 19. Vertical cross-section of the wiper-blade reactor. A, Sealing arrangement B, gas phase C, rotor D, sealing E, bearing F, excess gas flow G, gas collected from the liquid exit H, overflow vessel I, liquid exit J, rotor blades K, gas feed L, adjustable shaft M, baffles N, reactor shell O, cooling jacket P, cooling water feed and exit Q, sampling port R, grooves S, liquid phase T, gas-liquid interface U, top and bottom plates and V, liquid feed. (After Manor and Schmitz, 1984 also from Chaudhari et al., 1986, by courtesy of Marcel Dekker, Inc.).

This valve (Figure 8-6, p. 88) attaches to the main condenser. It permits attachment of a sample to the condenser without breaking the vacuum seal on the other sample holders. Samples also can be removed in the same way. The white valve stem on the front is turned to control the operation. The valve usually is made of a rather hard rubber with a plastic inner stem. It also includes an internal baffle to prevent cross contamination from one sample to another. It can be taken apart for cleaning. 

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