A piezoelectric ring bender servo valve assembly reduces mechanical wear by removing mechanical components used in prior art servo valves. The assembly does not use torque motor, flapper, and feedback spring. In this manner, no moving parts are required, which reduces maintenance and costs. A pair of piezoelectric ring benders mount adjacently to a pair of nozzles. The piezoelectric ring benders independently regulate the flow of fluid through the nozzles by moving between an open position to enable flowage, and a closed position to restrict flowage. A linear position sensing device measures and provides feedback about the spool position to a valve controller. The valve controller allows the spool valve to move until valve position achieves command position and the force on the spool valve is in equilibrium with pressure difference across spool valve. An H-bridge operable to switch the polarity of a differential pressure applied across to a load.

The invention relates to a pressurization unit for use in processing equipment handling high pressure fluid, where the pressurization unit comprises at least one inlet and an outlet, the pressurization unit being adapted to receive a feed fluid at a feed pressure level at the inlet, being adapted to isolate the received feed fluid from the inlet and from the outlet and being adapted to increase the pressure of the fluid to a higher predetermined level and further being adapted to output the fluid through the outlet into the high pressure process while still isolated towards the inlet.

Embodiments described herein are directed to regulating pressure and/or fluid flow within a system. In one scenario, a system for regulating pressure includes a controller, a pneumatic pressure regulator with a dome that adjusts pressure within the system, a current-to-pneumatic converter that converts an electrical current signal to a pneumatic pressure signal, and a pressure transducer. The controller receives an outlet pressure signal from the pressure transducer indicating a current level of system pressure, compares the current system pressure level to a desired system pressure level and, upon determining that the current system pressure level is above or below the desired system pressure level, sends an electrical current signal to the current-to-pneumatic converter that converts the electrical current signal to a pneumatic pressure signal that is sent to the dome of the pneumatic pressure regulator to raise or lower system pressure to the desired system pressure level.

A valve (1) having a valve housing (2) with at least one supply connection (P), a working connection (A) and an outlet opening (T), as well as a valve piston (3) that is arranged and able to move axially within the valve housing (2). The outlet opening (T) provided in the valve housing (2) has at least first and second control edges (4, 5).

An example valve includes a main stage and a pilot stage. The pilot stage includes a pilot poppet that is axially movable, a pilot piston, and a pilot spring applying a biasing force on the pilot poppet. The valve further includes a pilot seat member disposed between the main stage and the pilot stage and configured to form a pilot seat for the pilot poppet. When a pilot pressure fluid signal is received through a pilot port, the pilot pressure fluid signal applies a pressure on the pilot piston causing the pilot piston to move axially, thereby reducing the biasing force applied by the pilot spring on the pilot poppet.

A pressure regulator has a pressure chamber connected to an inlet flow area which receives liquid flow. As liquid flows into a forward chamber of the pressure chamber, pressure is exerted on the forward face of the piston, which in turn causes the piston to slide longitudinally through the pressure chamber. A bypass fluidically connects the forward pressure chamber and rear pressure chamber such that as the piston slides into the rear pressure chamber pressure increases at the rear pressure chamber, which in turn forces the piston to move forwardly, thus regulating flow out of the pressure chamber. A hand wheel is configured to turn a movable plate located inside the pressure chamber, with the movable plate configured to impede the piston from moving rearwardly. Pressure sensors and vents with a pressurized air source may be used to keep the pressure within a desired range.

An electronic device and a method are disclosed. The electronic device includes a sensor, a memory, a processor, and a communication interface. The sensor is configured to detected vibrations of a gas pressure regulator. The memory is configured to store the detected vibrations. The processor is configured to record the detected vibrations caused by the gas pressure regulator at a predetermined time interval. The processor is also configured to generate a report of the recorded vibrations caused by the gas pressure regulator to indicate the operational status of the gas pressure regulator, wherein the generated report includes at least two recorded vibrations. The communication interface configured to transmit the generated report.

Animal drinking troughs have pressure reducers for reducing the higher pressure of the liquid supply to a low liquid pressure for supplying the animal drinking troughs. For various reasons, it is desired to change the reduced pressure. This takes place by adjustment of the pressure reducers. It is known to undertake such an adjustment with compressed air. This requires a separate compressed air source and a corresponding pipe system. The invention makes provision to adjust the pressure reducer hydraulically by means of the higher pressure of the liquid of the liquid supply. The energy required for adjusting the pressure reducers thereby provides the liquid pressure of the liquid supply. As a result, the pressure reducers according to the invention operate autonomously. A separate energy source for adjusting the pressure reducers is not required.

A system includes a pre-assembled, modular valve assembly configured to be coupled to both an industrial gas appliance and a fuel supply system for the industrial gas appliance. The system includes a manual isolation valve, a first block valve, and a bleed valve. The modular valve assembly is configured to be disposed at a location separate from the industrial gas appliance.

The invention provides a pneumatic circuit for supplying air to at least one discharge valve that is pneumatically actuated and to at least one depressurizing device for depressurizing an oil enclosure in a turbine engine, the pneumatic circuit comprising: a pneumatic control unit having at least one solenoid valve supplying compressed air to a discharge valve of a compressor of the turbine engine; at least one depressurizing device for depressurizing an oil enclosure of the turbine engine, the device including a compressed air ejector for depressurizing the oil enclosure; and a pneumatic bistable member that is supplied with air by different first and second compressed air sources and that is suitable for supplying the pneumatic control unit and the depressurizing device with air coming from the first or the second compressed air source as a function of the operating speed of the turbine engine.