Straight Tube and Fixed Tube Sheet: Types BEM, AEM, NEN, etc
• Less costly than removable bundle designs
• Capable of multiple pass designs
Limitations:
• Shell side can only be cleaned by a chemical solution
• No ability to absorb thermal expansion between the outer shell and tube bundle
Removable Bundle and Externally Sealed Floating Tube sheet: Type AEW, BEW This design allows for the tube bundle to be removed for inspection and cleaning. With Basco’s OP design, thehead can be removed for inspection of the interior of the tubes, without releasing the pressure on the shellside process.