Patent ID: 8281803

Claim:
A fluid regulating device, comprising: a valve having an inlet, an outlet, and a valve port disposed between the inlet and the outlet; an actuator coupled to the valve and comprising a valve disc, the valve disc adapted for displacement between a closed position engaging the valve port and an open position disposed away from the valve port; a Pitot tube having a first end in fluid communication with the outlet of the valve and a second end in fluid communication with an interior of the actuator to place the interior of the actuator in fluid communication with the outlet of the valve, wherein the actuator is configured to cause the valve disc to move toward the valve port when the pressure at the outlet increases and to cause the valve disc to move away from the valve port when the pressure at the outlet decreases to maintain a pressure downstream of the fluid regulating device approximately equal to a setpoint pressure; and a balanced port housing disposed in the valve and comprising a generally cylindrical first portion disposed proximate the actuator, a generally cylindrical second portion disposed proximate the valve port, and an opening through a sidewall of the second portion and disposed between the valve port and the outlet of the valve; and a partial obstruction disposed within the opening of the second portion of the housing, wherein a flow of fluid through the valve port passes through the partial obstruction and to the outlet of the valve; wherein the valve disc is slidably disposed within the second portion of the balanced port housing.