FIELD: pumping and filtering equipment. SUBSTANCE: unit has hermetically sealed vessel with two return valves, filter mounted within intake hose and drain hose. Stem with piston is secured on closure of hermetically sealed vessel so that piston effectuates reciprocating oscillatory motion within vessel to close stem openings. It allows different filtered liquids to be pumped from hermetically sealed vessel into higher positioned vessels. EFFECT: increased efficiency by continuous pumping process and enhanced reliability in operation. 1 dwg
Authors
Dates
1998-08-20—Published
1997-01-16—Filed