# US 2014/0150874 A1 · Gas line control system and modular variable pressure controller > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0150874 A1 - Document ID: US20140150874A1 - Status: Published application - Kind: A1 - Application number: 13/899,013 - Filed: 2013-05-21 - Published: 2014-06-05 - Earliest claimed: 2012-05-21 - Assignees: VRG Controls, LLC - Applicants: VRG Controls, LLC - Inventors: James Michael Garvey; Vladimir Rimboym - Web page: https://patentgrep.com/patent/US20140150874A1 ## CPC - F16K 17/105: {using choking or throttling means to control the fluid operation of the main valve} - G05D 16/166: {using pistons within the main valve} - Y10T 137/0318: Processes - Y10T 137/777: Spring biased - Y10T 137/86919: Sequentially closing and opening alternately seating flow controllers - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} - G05D: SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A pneumatically controlled assembly, system, method and device for the regulation of pressure of a gas as it flows in a pressurized line and including at least one loading valve which is set to respond to variations in pressure in conjunction with a pneumatically actuated process control valve so as to effectively regulate and maintain pressure of the gas in the pressurized line. ## Claims ### Claim 1 A pneumatic valve pressure controller system comprising: a fluid supply line having an inlet end and an outlet end; a process process control valve fluidly connected to the fluid supply line between the inlet end and the outlet end; a supply regulator fluidly coupled to the fluid supply line upstream of the process process control valve; an actuator operably connected to the process process control valve and having a first pressure chamber and a second pressure chamber; a sensing diaphragm connected to the fluid supply line for determining a relative pressure in the fluid supply line on the outlet end side of the process process control valve; a first loading valve fluidly coupled to the first pressure chamber and responsive to the sensing diaphragm; and a second loading valve fluidly coupled to the second pressure chamber and responsive to the sensing diaphragm; wherein the first loading valve and the second loading valve open and close in response to the sensing diaphragm to change a position of the actuator and thereby operate the process process control valve. ### Claim 2 (depends on 1) The system of claim 1, wherein the first loading valve and the second loading valve are normally closed valves. ### Claim 3 (depends on 2) The system of claim 2, wherein the first loading valve and the second loading valve move between a closed position and an open position independent of one another. ### Claim 4 (depends on 2) The system of claim 2, wherein the first loading valve and the second loading valve move synchronously between a closed position and an open position. ### Claim 5 (depends on 3) The system of claim 3, wherein a pressure rise in the fluid supply line determined by the sensing diaphragm opens the first loading valve which changes the position of the actuator to move the process process control valve toward a fully closed position. ### Claim 6 (depends on 3) The system of claim 3, wherein a pressure drop in the fluid supply line determined by the sensing diaphragm opens the second loading valve which changes the position of the actuator to move the process process control valve toward a fully open position. ### Claim 7 (depends on 2) The system of claim 2, further comprising a first adjustable orifice fluidly in-line with the first loading valve and a second adjustable orifice fluidly in-line with the second loading valve, the supply regulator and the first adjustable orifice. ### Claim 8 (depends on 4) The system of claim 4, wherein a pressure threshold in the fluid supply line determined by the sensing diaphragm opens the first and second loading valves which changes the position of the actuator to operate the process process control valve toward a position to adjust fluid flow. ### Claim 9 (depends on 1) The system of claim 1, wherein the first loading valve and the second loading valve are normally open valves. ### Claim 10 A method for controlling a fluid supply through a delivery line having a process control valve therein to maintain a supply side pressure and a delivery side pressure, and a pneumatic actuator having a first pressure chamber and a second pressure chamber and used to operate the process control valve, the method comprising the steps of: setting a delivery side target pressure range for the fluid supply; sensing the delivery side pressure; operating the pneumatic actuator in one of the following ways: maintaining the actuator in a static state when the delivery side pressure is within the target range; moving the actuator to open the process control valve when the delivery side pressure is below the target range; and moving the actuator to close the process control valve when the delivery side pressure is above the target range; wherein, the first and second pressure chambers of the actuator are responsive to a first loading valve fluidly coupled to the first pressure chamber and a second loading valve fluidly coupled to the second pressure chamber, and the first loading valve and the second loading valve open and close in response to the delivery side pressure to change a position of the actuator and thereby operate the process process control valve. ### Claim 11 A variable pressure controller for use in a fluid delivery system, the controller comprising: a first fluid interface for coupling to a fluid line upstream of a process control valve; a sensing mechanism positioned at the first fluid interface and responsive to a pressure in the fluid line upstream of a process control valve; a first internal loading valve responsive to the sensing mechanism; a second internal loading valve responsive to the sensing mechanism; a first manifold comprised of two outlet ports, wherein one outlet port is coupled to a first channel fluidly coupled to the first internal loading valve and one outlet port is coupled to a second channel fluidly coupled to the second internal loading valve; and a second manifold comprised of two outlet ports, wherein one outlet port is coupled to a first channel fluidly coupled to the first internal loading valve and one outlet port coupled to a second channel fluidly coupled to the second internal loading valve. ### Claim 12 (depends on 11) The controller of claim 11, further comprising at least one module capable of interfacing with at least one of the first manifold and the second manifold. ### Claim 13 (depends on 11) The controller of claim 11, wherein the first internal loading valve is one of either a normally-closed loading valve and a normally-open loading valve. ### Claim 14 (depends on 13) The controller of claim 13, wherein the second internal loading valve is one of either a normally-closed loading valve and a normally-open loading valve. ### Claim 15 (depends on 14) The controller of claim 14, wherein the first internal loading valve and the second internal loading valve are similar valves. ### Claim 16 (depends on 14) The controller of claim 14, wherein the first internal loading valve and the second internal loading valve are dissimilar configurations. ### Claim 17 (depends on 11) The controller of claim 11, wherein the sensing mechanism comprises an adjustable pressure set-point screw, a sensing diaphragm, and a control spring. ### Claim 18 (depends on 11) The controller of claim 11, wherein the channels of the first and second manifolds further comprise at least one adjustable orifice. ### Claim 19 (depends on 11) The controller of claim 11, further comprising at least one sensitivity adjustment.