Fluid level controller

Details Fluid level controller Fluid level controller

1989-01-02

1989-07-04

Walton, George L.

Fluid handling

Liquid level responsive or maintaining systems

60527, 60528, 62 492, 73295, 236 68B, 251 11, F16K 3168

Patent

active

048441171

ABSTRACT:
A fluid level controller having a thermal expansion element in the form of cylinder made from polytetrafluoroethylene. The cylinder is located in a container which is connected to a supply of cryogenic fluid by a ball valve. When the cryogenic fluid in the container reaches the level of the cylinder and cools it, the cylinder shrinks and causes a lever to close the ball valve. When the cryogenic fluid falls below the level of the cylinder, the cylinder expands and the lever opens the ball valve and permits cryogenic fluid to flow through the valve and into the container. The cylinder has a heating element disposed in its interior to hasten the response of the cylinder to a change in the fluid level.

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