BALANCED REGULATOR WITH TARGETED BOOST SENSING TUBE

摘要

A balanced port pressure regulator includes a valve body having a fluid inlet and a fluid outlet connected by a fluid passageway, an orifice being disposed between the fluid inlet and the fluid outlet. A valve seat is disposed within the fluid passageway. A valve plug is also disposed within the fluid passageway. A piston is disposed within the valve body, the piston separating the fluid passageway from a balancing chamber. A sleeve extends away from the piston, the sleeve forming a balancing passage that fluidly connects the fluid passageway with the balancing chamber. The sleeve includes an open end that terminates within the orifice. By terminating within the orifice, the open end of the sleeve generates boost only towards the end of a valve opening cycle when the valve plug approaches a fully open position, which is where boost is most needed.

主权项

1. A balanced port pressure regulator, comprising:
a valve body having a fluid inlet and a fluid outlet connected by a fluid passageway, an orifice being disposed between the fluid inlet and the fluid outlet, the orifice being the most restrictive portion of the fluid passageway; a valve seat disposed within the fluid passageway; a valve plug attached to a movable valve stem, the valve plug and the valve stem being disposed within the fluid passageway, the valve plug interacting with the valve seat to selectively open or close the fluid passageway; a diaphragm retainer disposed within the valve body, the diaphragm retainer separating the fluid passageway from a balancing chamber; a sleeve extending away from the diaphragm retainer, the sleeve circumferentially surrounding the valve stem, a space being formed between the sleeve and the valve stem, the space forming a balancing passage that fluidly connects the fluid passageway with the balancing chamber; wherein the sleeve includes an opening that is located within the orifice.