US PATENT SUBCLASS 137 / 505.2
.~.~.~ With protective separator

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

455  DF  LINE CONDITION CHANGE RESPONSIVE VALVES {11}
494  DF  .~ With separate connected fluid reactor surface {8}
505  DF  .~.~ With opening bias (e.g., pressure regulator) {13}
505.2.~.~.~ With protective separator

DEFINITION

Classification: 137/505.2

(under subclass 505) Devices relating to the control of gas or vapor and having a distinct reactor surface chamber and connecting passage to the flow line whereby a liquid seal is provided which prevents line gas or vapor from directly contacting the reactor surface.

SEE OR SEARCH THIS CLASS, SUBCLASS:

505.19, for liquid level type reactor surfaces which inherently protect the valve actuator.