The Shand & Jurs Model 93603 Liquid Seal is used with liquid level gauges to retain tank vapor space pressure and vacuum. It is also used as a barrier to protect the gauge head from corrosive tank vapors or other effects. The construction of the liquid seal features aluminum housings, galvanized iron pipe, Delrin tape pulleys that rotate on teflon bearings and stainless steel shafts.
The 93603 requires a relatively simple installation which is shown at left. The seal assembly is installed within a piping configuration that runs from the top of the tank, along the side, to the bottom.