Regulators having an isolated loading chamber and blowout prevention apparatus

摘要

Fluid regulators are described. An example regulator includes a regulator body defining a sensing chamber between an inlet and an outlet of a fluid flow passageway of the fluid regulator. A bonnet is coupled to the regulator body and defines a loading chamber disposed adjacent the sensing chamber. The loading chamber is substantially sealed relative to the sensing chamber and an environment surrounding the fluid regulator. A sensor guide is disposed between the sensing chamber and the loading chamber and has at least one seal to fluidly isolate the loading chamber from the sensing chamber. The sensor guide has a vent flow path between the sensing chamber and the loading chamber to vent the sensing chamber during a failure condition of the at least one seal.

主权项

1. A fluid regulator, comprising:
a regulator body defining a sensing chamber between an inlet and an outlet of a fluid flow passageway of the fluid regulator; a bonnet coupled to the regulator body, the bonnet defining a threaded aperture and a loading chamber disposed adjacent the sensing chamber, the loading chamber is sealed relative to an environment surrounding the fluid regulator, the loading chamber to receive a biasing element, the loading chamber not to be subject to a reference pressure; a sensor guide disposed between the sensing chamber and the loading chamber, the sensor guide having a first seal to fluidly isolate the loading chamber from the sensing chamber, the sensor guide having a vent flow path between the sensing chamber and the loading chamber to vent the sensing chamber during a failure condition of the first seal, the regulator body defining a transverse bore between an interior surface of the regulator body and an exterior surface of the regulator body, the transverse bore to align with the vent flow path to enable fluid communication therebetween, the exterior surface of the regulator body defining a groove that is partially defined by the transverse bore; a second seal or a filter disposed in the groove to cover an outlet of the transverse bore; a cap covering at least a portion of the bonnet; a third seal positioned between the cap and the bonnet, the third seal to enable the loading chamber to be sealed relative to the environment surrounding the fluid regulator; a biasing element adjuster to extend through and threadably engage the threaded aperture, the biasing element adjuster being movable to change a load imparted by the biasing element; and a fourth seal positioned around the biasing element adjuster immediately adjacent an end of the bonnet and an opening of the threaded aperture, the fourth seal to enable the loading chamber to be sealed relative to the environment surrounding the fluid regulator.