A high pressure container system is equipped with an upstream side pressure sensor that measures an internal pressure of high pressure containers upstream of a pressure regulating valve, a plurality of downstream side pressure sensors that measure the pressure of the fluid downstream of the pressure regulating valve, and a control device. At a normal time of the downstream side pressure sensors, a control device monitors the internal pressure of the high pressure containers on the basis of the measured values of the downstream side pressure sensors, and at an abnormal time when any one of the downstream side pressure sensors is abnormal, the control device monitors the internal pressure of the high pressure containers on the basis of the measured values of the downstream side pressure sensors, and the measured value of the upstream side pressure sensor.

Blocking device for pressurized gas pipelines includes: a blocking valve, which includes: a connection body; a movable shutter; a stem carrying the shutter; a fluid-dynamic actuator, configured to translate the stem; thrust means to bring the shutter from an operating position of opening to an operating position of complete closure; a control system for controlled actuation of the fluid-dynamic actuator, having a by-pass group for equalizing upstream pressures in an upstream chamber and downstream pressures in a downstream chamber, and a pressure reducer group interconnected with the bypass group, the pressure reducer group configured to receive a motorization fluid at a supply pressure as input, and to supply the fluid-dynamic actuator with a motorization pressure through a motorization line, the control system having a pressure differential selector that detects a signal of the upstream pressure and a signal of the supply pressure.

A pressure reference resetting structure of an inflatable mattress, the inflatable mattress contains a valve connected with an end of the inflatable mattress, an inflatable air pump connected with the valve, and the valve being connected with a pressure detection pipe which is coupled with a pressure sensing element. The valve includes an air orifice communicated with the pressure detection pipe so that the pressure sensing element detects a pressure of an external environment via the pressure detection pipe and the air orifice, and a reference pressure of the inflatable mattress is reset to inflate the inflatable mattress based on the reference pressure.

Embodiments of a fuel system are disclosed. The fuel system includes a bypass valve (BPV), a fuel metering valve (FMV), a flow sense valve (FSV), and an actuator regulating valve (ARV). The BPV includes a BPV valve member that regulates fuel flow from a BPV inlet to a BPV outlet. The position of the BPV valve member is controlled by pressures at an inlet and an outlet of the FMV. The FSV includes an FSV valve member that regulates fuel flow from an FSV inlet to an FSV outlet. The ARV includes an ARV inlet that is in fluid communication with the FSV outlet, and fuel flow through an ARV outlet regulates downstream actuators. The position of the FSV valve member to produce fuel flow through the FSV outlet to the ARV inlet is controlled at least in part by a pressure at the BPV outlet.

A fuel cell arrangement has an anode connected to an H2 inflow and a cathode connected to an O2 inflow. A differential pressure control device is arranged between the H2 inflow and the O2 inflow for controlling a differential pressure between the H2 inflow and the O2 inflow. The differential pressure control device has a fluid connection between the H2 inflow and the O2 inflow, in which a deflectable diaphragm is arranged, to which a pin is coupled, which, when the diaphragm is deflected, opens a valve arranged in the H2 inflow.

A material processing apparatus including a processing chamber, an external pressure source, a pressure reducer, a temperature regulator, and a controller is provided. The processing chamber has an internal space. The external pressure source is connected to the processing chamber to pressurize the internal space. The pressure reducer is connected to the processing chamber to depressurize the internal space. The temperature regulator is arranged in the processing chamber to adjust the temperature in the internal space. The controller is configured to control the external pressure source and the temperature regulator to respectively increase the temperature to a first predetermined temperature and the pressure to a first predetermined pressure, and to control the pressure in the processing chamber to rise continuously before the temperature in the processing chamber rises to the first predetermined temperature. An operating method of a material processing apparatus is further provided.

The present invention discloses a load-sensing multi-way valve with a variable differential pressure, where each valve group uses a new element: an electro-hydraulic pressure compensation valve, so as to implement continuous real-time adjustment and control of compensated differential pressure and real-time position feedback and monitoring of a compensation valve trim, and overcome a flow mismatch problem of a conventional LS system in a flow saturation working condition and problems of a fixed shunting proportion of an LUDV system and poor operation coordination of actuators. The load-sensing multi-way valve with a variable differential pressure disclosed in the present invention has advantages such as strong working condition applicability, high flow distribution accuracy, and strong technicality.

A flow rate control device (100) comprises: a pressure control valve (6) provided in a flow path; a flow rate control valve (8) provided downstream side of the pressure control valve; and a first pressure sensor (3) for measuring pressure on the downstream side of the pressure control valve and on the upstream side of the flow rate control valve. The flow rate control valve has a valve element (13) seated on/separated from a valve seat (12); a piezoelectric element (10b) for moving the valve element so as be seated on/separated from the valve seat; and a strain sensor (20) provided on a side surface of the piezoelectric element. The pressure control valve (6) is configured to control the pressure control valve (6) on the basis of a signal output from the first pressure sensor (3), and to control the driving of the piezoelectric element of the flow rate control valve (8) based on a signal output from the strain sensor (20).

A fluid delivery system includes a first pressure sensor disposed on or near a spray gun and configured to monitor a first fluid, and a second pressure sensor disposed on or near the spray gun and configured to monitor a second fluid. The fluid delivery system further includes control system comprising a processor configured to receive a first signal from the first pressure sensor and to receive a second signal from the second pressure sensor. The processor is further configured to derive a pressure difference between the first and the second pressure sensor representative of a fluid pressure difference between the first fluid and the second fluid and to control one or more pumps to obtain a desired pressure difference.

A pressure regulator for controlling flow of a fluid therethrough is provided. An upper housing member and a primary diaphragm define an upper chamber and a lower housing member and the primary diaphragm define a lower chamber. The pressure regulator further includes: a valve assembly provided within the upper chamber for controlling the flow of the fluid from an inlet body into the upper chamber; a secondary diaphragm provided within the lower chamber and defining a secondary diaphragm driving chamber; and a passageway connecting the inlet body and the secondary diaphragm driving chamber. During operation, the secondary diaphragm driving chamber is filled with the fluid at the inlet pressure, thereby subjecting the secondary diaphragm to the inlet pressure and generating the force for actuating the valve's disengagement from the inlet body. The pressure regulator functions to maintain the outlet pressure at a value that is a predetermined fraction of the inlet pressure.