Fluid handling – Processes – Cleaning – repairing – or assembling
Patent
1986-08-15
1988-01-26
Cohan, Alan
Fluid handling
Processes
Cleaning, repairing, or assembling
137568, 417442, 152465, 134 21, B08B 912
Patent
active
047211270
ABSTRACT:
A method and apparatus are disclosed which may be used in removing contaminants from underground petroleum storage tanks. A positive displacement pump and piping manifold are used to withdraw contaminants from an underground tank and pump those contaminants into a receiving drum. A startup suction valve is utilized to control the rate at which withdrawal is initiated and a bypass valve controls the rate of withdrawal from the tank as the cleaning operation is performed. A sample connection at the pump discharge provides means for determining the contaminant-to-product ratio of fluid being withdrawn from the underground tank. The bypass valve may be adjusted to maximize the contaminant-to-product ratio and minimize the loss of petroleum product.
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"tankleenor.TM." brochure, The Gorman-Rupp Company, .COPYRGT.1983.
Cohan Alan
Rivell John
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