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Pneumatic reset relief valve

  • US 20030029505A1
  • Filed: 08/08/2002
  • Published: 02/13/2003
  • Est. Priority Date: 08/08/2001
  • Status: Active Grant
First Claim
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1. A pressure regulator valve assembly for connection to the output of a pressure varied supply source, the assembly comprising:

  • (a) a valve body having an inlet port and a discharge port, wherein the supply source output is delivered through the inlet port;

    (b) a pressure chamber between the inlet and outlet ports, the pressure chamber defining a cap;

    (c) a load piston in the pressure chamber for modulating flow between the inlet and outlet ports;

    (d) a rod coupled to the load piston and penetrating the cap;

    (e) a pneumatic control chamber mounted to the cap;

    (f) a top piston connected to the rod and positioned within the pneumatic control chamber; and

    (g) a pneumatic control valve connected to the pneumatic control chamber, the pneumatic control valve adapted to set the pressure of the supply source at which valve assembly opens.

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