The disclosure generally describes a method for venting pressurized hydrogen gas from a device for simulating a refueling operation for a fuel cell electric vehicle (FCEV).

A pressure gauge includes a housing defining a fluid path and a bleed path. An inlet is mounted on the housing and a pressure sensor is disposed within the housing. A bleed valve is disposed along the fluid path and selectively opens or closes the bleed path. An actuator moves the bleed valve between a closed position and an open position. A control module is coupled to the pressure sensor and the actuator and includes a memory and a processor. A target fluid pressure is stored in the memory and the processor receives pressure data from the pressure sensor. When the pressure data is greater than the target fluid pressure, the processor controls the actuator to place the bleed valve in the open position. When the pressure data is equal to the target fluid pressure, the processor controls the actuator to place the bleed valve in the closed position.

A pressure-regulating valve for a fluid medium that is at system pressure, e.g., for system pressures >1000 bar, has a valve housing with an inlet channel and at least one outlet channel. A valve seat arranged in the valve housing has a conical recess holding an axially mobile valve body with a lateral outer surface at least part of which is conical. The interaction of the valve body and valve seat regulate throughflow of medium from the inlet channel to the outlet channel. The valve seat, adjacent to the lateral outer surface of the valve body, includes a first pressure chamber from which there extends, in the direction of movement of the valve body, a throttle gap along the lateral outer surface of the valve body. The conical lateral outer surface of the valve body extends, in the direction of movement of the valve body, on either side of the pressure chamber through the conical recess of the valve seat.

An inflation control system for an inflatable device may comprise: a compressed fluid source; a solenoid valve connected to the compressed fluid source and configured to control a flow of gas to the inflatable device; and a control circuit comprising a power source, a pressure switch, and an electrical switch, the control circuit configured to energize, via the power source, the solenoid valve in response to both the pressure switch and the electrical switch being in a closed state, the pressure switch configured to open and de-energize the solenoid valve in response to being exposed to a pressure at or exceeding a pressure threshold.

A pressure capsule/header assembly for a process fluid pressure transmitter is provided. An isolator plug has an isolation diaphragm at a first end thereof and a second end spaced from the first end. The isolator plug has a fill fluid passageway fluidically coupling the first end to the second end. A header has a first end configured to carry a pressure sensor and a second end spaced from the first end. The header has at least one electrical interconnect extending from the first end to the second end. A biaxial support ring is disposed about an outer surface of the header. The biaxial support ring and the header define a tapered interference interface therebetween. The header is welded to the isolator plug at a first weld and the biaxial support ring is welded to the isolator plug at a location that is spaced from the second end of the header.

Implementations described herein relate to pressure control for vacuum chuck substrate supports. In one implementation, a process chamber defines a process volume and a vacuum chuck support is disposed within the process volume. A pressure controller is disposed on a fluid flow path upstream from the vacuum chuck and a flow restrictor is disposed on the fluid flow path downstream from the vacuum chuck. Each of the pressure controller and flow restrictor are in fluid communication with a control volume of the vacuum chuck.

A rate-of-change flow measurement device is provided including first pressure sensor, a position control valve with a valve position sensor, a second sensor position and a chamber comprising a part of the flow path of the device, and an isolation valve, arranged in this order along the flow path of the device. The device receives valve position data from the valve position sensor and pressure data from the pressure sensors, and calculates a volume of the chamber at least in part using the valve position data when a calibration of a device-under-test is performed by decreasing a pressure of the chamber or increasing the pressure of the chamber while opening the position control valve to maintain the pressure reading of the first pressure sensor constant to stay at a pressure set point.

A column packing apparatus includes a tubular structure, a packing material supplier disposed on one end of the tubular structure for permitting a packing material slurry formed by a packing material dispersed in a solvent to be packed into the tubular structure, and a packing controller disposed on the other end of the tubular structure for determining the flow rate and pressure of the packing material slurry formed by the packing material being packed so that they can be maintained at predetermined flow rate and pressure level. A column packing method includes the steps of providing a packing controller disposed on the other end of the tubular structure, and permitting the packing controller to variably adjust the flow rate and pressure of the packing material slurry so that they can be maintained at the predetermined flow rate and pressure level.

A valve control system and a valve control method can improve working efficiency and security of the operator. The valve control system includes: a regulating valve, mounted to a pipeline to control the opening or closing of the pipeline; an driving device, connected to the regulating valve and configured to control the regulation of the regulating valve; a detector, mounted to the pipeline and configured to detect fluid pressure in the pipeline; a first controller, connected to the driving device and the detector and configured to control the driving device; and a second controller which can perform data interaction with the first controller, wherein the first controller can perform corresponding regulation according to an instruction from the second controller.

A structural body includes: a three-dimensional net shaped body including a plurality of net lines that form a three-dimensional net shape; and a plurality of objects respectively present in two or more of a plurality of spaces partitioned by the plurality of net lines. The plurality of objects are each a mobile object that moves within one of the plurality of spaces or moves over two or more of the plurality of spaces.