A vacuum regulator device having a vacuum regulator and a vacuum gauge on a housing line that is configured to be in fluid communication with a patient include an electronic valve that selectively opens and closes the housing line. The vacuum gauge is located between the vacuum regulator and the patient and includes an electronic flow sensor upstream. The electronic flow sensor provides feedback to the vacuum regulator.

A method for bending a flexible panel includes first, providing an airbag assembly; second, inflating the airbag assembly; next, abutting against the bending area with the airbag assembly; and lastly, bending the flexible panel by pivoting on the airbag assembly so that a bent portion of the flexible panel tightly contacts a surface of the airbag assembly, and the terminal area is located behind the flexible panel. The airbag assembly includes a housing and an elastic film. The housing includes at least one outlet and at least one inlet. The elastic film wraps the housing to form a gas chamber. The outlet and the inlet communicate with the gas chamber.

A valve device including an outlet port, a first valve unit with a first valve element for setting a first throttle opening for influencing a first airflow of pressurised air which is to be output at the outlet port or is to be released via the outlet port, a first throttle control loop for the closed-loop control of the first throttle opening according to a first setpoint, a pressure control loop for the closed-loop pressure control of an outlet pressure present at the outlet port to a pressure setpoint amid the use of a first throttle control loop as a subordinate control loop, wherein on closed-loop pressure control the pressure control loop specifies a first throttle setpoint to the first throttle control loop as the first setpoint, wherein the valve device is further configured to provide a throttle setting function and, within the throttle setting function, to limit the first throttle opening to a first limitation value and/or within the throttle setting function to specify a first direct setpoint which does not come from the closed-loop pressure control, to the first throttle control loop as the first setpoint.

A device including: a sensor for monitoring a pressure of a fluid system to produce pressure signals over a period; and a controller configured for: receiving the pressure signals over the period; establishing an operating pressure zone corresponding to the pressure signals over the period, the operating pressure zone is representative of a normal operation zone of the fluid system, the normal operation zone defined by an area bounded by a low pressure level and high pressure level, wherein the high pressure level is disposed at a level at least at a maximum pressure of the pressure signals over the period and the low pressure level is disposed at a level at most at a minimum pressure of the pressure signals over the period.

A fluid pressure control apparatus includes a proportional solenoid valve operatively connected between a fluid inlet and a fluid outlet and a pressure sensor fluidically coupled to the fluid outlet, wherein an electronic controller generates and outputs a control signal to the solenoid valve in dependence on a first signal from the pressure sensor and a second signal corresponding to a pressure set point, where the solenoid valve has a rest position between opened and closed, and the electronic controller is further adapted to generate the control signal with either of opposite polarities to move the valve in either of opposite directions from its rest position in order to reduce power consumption and heat generation, in particular for use in gas analysis equipment located in hazardous areas.

A safety device for hydrodynamic pressure regulating pipe network includes a gate valve, which comprises at least a valve body and a gate. A water inlet of the gate valve is used to be connected to a water inlet pipeline. A hydraulic driving device, which comprises a hydraulic cylinder, is also included. The hydraulic cylinder includes a cylinder body, a piston and a piston rod. The piston rod is connected to the gate. The lower part of the inner cavity of the cylinder body is connected to the water inlet pipeline through a gate opening power pipelines. The upper part of the inner cavity of the cylinder body is connected to a gate closing driving device, which is used to drive the gate and close the gate valve.

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.

An apparatus, method and computer program is described for: receiving, over a period of time, a signal indicative of a pressure measured by a pressure sensor of an earpiece, the earpiece comprising an ear tip configured for insertion into an ear canal of a user, wherein the pressure sensor is arranged to measure a pressure within the ear canal whilst the ear tip is inserted into the ear canal; determining one or more characteristics of the signal; and determining a measure of a quality of a seal between the earpiece and the ear canal based on the one or more characteristics.

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.

The invention relates to a hot water storage system, in particular for mobile applications, comprising a water reservoir (6), a pump (10), a heat exchanger (20) and a hot water storage tank (40), characterized in that the hot water storage tank (40) has a variable storage volume and in that a drain line (60) is provided which connects the hot water storage tank (40) to the water reservoir (6).