Overfill protection device (OPD)

Details Overfill protection device (OPD) Overfill protection device (OPD)

2011-06-28

2011-06-28

Fristoe, Jr., John K (Department: 3753)

Fluid handling

Liquid level responsive or maintaining systems

By float controlled valve

C251S251000, C137S434000, C137S413000

Reexamination Certificate

active

07967025

ABSTRACT:
An overfill protection device includes a piston (5) comprising a main seal or semi-sphere packing (3) on its tip and a V-shaped packing (4) on its side, a retracting spring (2) for pushing the piston back to its original position, a main valve (7) with an o-ring that drops into the inner hole of the retainer (10) to block off the gas flow, a level arm consisting of a rising faced section (28) and a U-shaped section (29), whereby no gas will be allowed to flow through the overfill protection device when the gas reaches the predetermined 80 percent level.

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