Dresser, Inc.

Paul Talmage Tirrell

Harold Randall Smart

Anatoly Podpaly

Jonathan Fredric Cohen

Lei Lu

Jagadish Gattu

Jagdish Gattu

A controller for a valve assembly that is configured to meet requirements for use in hazardous areas. These configurations may regulate flow of instrument air to a pneumatic actuator to operate a valve. The controller may comprise enclosures, including a first enclosure and a second enclosure, each having a peripheral wall forming an interior space, and circuitry comprising a barrier circuit disposed in the interior space of one of the enclosures that power limits digital signals that exits that enclosure. In one example, the peripheral wall of enclosures are configured to allow instrument air into the interior space of the first enclosure but to prevent instrument air from the interior space of the second enclosure.

Constructing valve positioners for hazardous areas

Some embodiments of a valve flushing kit used in temporarily flushing a globe valve can include a flushing bonnet assembly that includes a circular disk adapted to be received in the upper opening of an internal valve cavity of a valve when a closure bonnet and a closure member of the valve are removed and a plurality of bonnet clamps each having at least one opening therethrough, wherein the opening can be adapted to be received on one of the threaded studs protruding from the upper exterior surface of a body of the valve and the bonnet clamps can be held in place by the threaded nut.

Valve flushing kit

Growing community of inventors

Plymouth, MA, United States of America

Paul Talmage Tirrell