Control valve trim for high-pressure fluid flow

  • US 6,394,134 B1
  • Filed: 08/06/1999
  • Issued: 05/28/2002
  • Est. Priority Date: 07/14/1998
  • Status: Expired due to Term
First Claim
Patent Images

1. A fluid flow control device that comprises:

  • (1) a valve body with a fluid inlet and outlet, and a flow path between the inlet and the outlet;

    (2) a plug movable in the flow path;

    (3) a flow resister within the flow path cooperating with the plug for reducing the pressure and noise of the fluid passing through the valve body, wherein the flow resister is defined by a plurality of labyrinthine passages comprising rectangular sectional elbows formed by protrusions in alternating wall members in the flow resister wherein the openings for fluid inlet and outlet are opposed to the protrusions to produce tortuous flow paths for the fluid passing through the resister; and

    (4) a seat for closing the fluid outlet when the plug is brought into contact with the seat.

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