The plate and shell heat exchangers from Ram industries , a fully welded plate pack, laser/TIG welded together and mounted inside a traditional cylindrical shell. With a high thermal efficiency and lower purchase cost, plate and shell heat exchanger combines the benefits of a traditional shell & tube type heat exchanger but with the high efficiency provided for in a plate type exchanger. Advantages Small space requirement (only 30% of a traditional tubular heat exchanger) No gaskets Safe operation without leaking High working pressure Small liquid volume Laser welded plates