In-line back pressure fluid regulators

摘要

In-line back pressure fluid regulators are described. An example in-line fluid regulator includes a regulator body defining a sensing chamber and an outlet of a fluid flow path of the fluid regulator. The outlet is in fluid communication with the sensing chamber via a first flow passageway in the regulator body. A bonnet is coupled to the regulator body and defines an inlet of the fluid flow path and a loading chamber disposed between the sensing chamber and the inlet. The loading chamber is substantially sealed relative to the fluid flow path of the fluid regulator. A pressure sensor is disposed between the inlet and the sensing chamber, where the pressure sensor defines a second flow passageway to fluidly couple the inlet and the sensing chamber.

主权项

1. An in-line back pressure regulator, comprising:
a regulator body defining a sensing chamber and an outlet of a fluid flow path of the back pressure regulator, the outlet being in fluid communication with the sensing chamber via a first flow passageway in the regulator body; a bonnet coupled to the regulator body, the bonnet defining an inlet of the fluid flow path and a loading chamber disposed between the sensing chamber and the inlet; a pressure sensor disposed between the inlet and the sensing chamber, the pressure sensor having a first end defining a first pressure sensing surface in fluid communication with the sensing chamber and a second end defining a second pressure sensing surface opposite the first pressure sensing surface in fluid communication with the inlet, the pressure sensor having a pressure sensor body extending through the loading chamber, the pressure sensor body having an aperture formed between the first end and the second end to define a second flow passageway to fluidly couple the inlet and the sensing chamber; wherein the pressure sensor defines a retainer cavity; and a flow control assembly received within the retainer cavity, the flow control assembly comprising:
a retainer positioned within the retainer cavity of the pressure sensor, the retainer to define a portion of the first pressure sensing surface of the pressure sensor when the retainer is coupled to the pressure sensor;a flow control member coupled to the pressure sensor via the retainer, the flow control member to slide relative to the pressure sensor, the flow control member to move relative to a valve seat to control fluid flow through the fluid flow path of the back pressure regulator; anda guide positioned within the retainer cavity and having a fluid flow guide portion and a spring seat portion, the fluid flow guide to direct fluid flow from the second flow passageway toward the sensing chamber.