Embodiments of the invention provide a relief valve body arranged between an inlet and an outlet. The relief valve body includes an expanding nozzle extending along an axis, a first ramp extending in an arcuate path from an apex to a first terminal point, and a second ramp extending in an arcuate path from the apex to a second terminal point. The first ramp and the second ramp define an expanding flow area for a fluid flow between the inlet and the outlet.

Systems and methods described herein provide a pilot-operated oscillating valve including a diaphragm. The valve is configured such that when the diaphragm is in a closed position, pressure of a fluid supply opens the valve, and when the diaphragm is in an open position, the pressure of the fluid closes the valve. The oscillating valve may further include an actuator that can cause the valve to be arrested selectively in the open position or the closed position depending on a state of the actuator. The state of the actuator is switchable with a small expenditure of energy, enabling an extended duty cycle for a battery or other power source associated with the actuator. In some implementations, energy from the oscillating movement of the diaphragm may be captured to recharge the battery for the actuator.

Concepts and technologies disclosed herein for relief valves (relief valves). A relief valve can include a flow path, a primary valve poppet that is urged or biased into a closed position by a tensioned spring, and a pilot valve in communication with a valve compartment of the relief valve. When an exterior space pressure overcomes the tensioned spring, the primary valve poppet can be overcome and pressure between an interior space and the exterior space can equalize, at least partially. When the pressure within the interior space increases beyond a defined threshold, which can be defined by a spring of the pilot valve, the pilot valve can open, the valve compartment can vent, and the tensioned spring again can be overcome and can open to allow at least partial equalization of pressures within the interior space and the exterior space.

A vent valve comprises a valve housing defining a vent port and a valve member mounted within the housing so as to define a fluid system chamber and an activation chamber with the housing. The valve member is biased towards a closed position, in which fluid communication between the fluid system chamber and the vent port is prevented, by fluid pressure within the fluid system chamber acting on the valve member. The valve member is biased towards an open position, in which there is fluid communication between the fluid system chamber and the vent port, by fluid pressure within the activation chamber acting on the valve member. The vent valve further comprises a pressure limiting arrangement associated with the activation chamber to limit pressure therein to a predetermined pressure value.

Embodiments of the invention provide a relief valve body arranged for connecting to a pressure vessel. The relief valve body includes an inlet configured to connect to a pressure vessel and an integrated nozzle downstream from the inlet and extending along an axis. The integrated nozzle includes a nozzle exterior surface, a nozzle bulb, and a valve seat and defines a nozzle expansion region. The relief valve body further includes a redirecting pallet, a valve interior surface having at least one ramped portion downstream from the integrated nozzle and redirecting pallet, and an outlet downstream from the at least one ramped portion.

Systems and methods described herein provide a pilot-operated oscillating valve that uses a battery. The valve is configured such that when a diaphragm is in a closed position, pressure of a fluid supply opens the valve, and when the diaphragm is in an open position, the pressure of the fluid closes the valve. An actuator causes the diaphragm to be arrested selectively in the open position or the closed position. The state of the actuator is switchable with a small expenditure of energy, enabling an extended duty cycle for a battery or other power source associated with the actuator. In some implementations, energy from the oscillating movement of the diaphragm may be captured to recharge the battery for the actuator.

An oscillating diaphragm valve is provided. The valve is configured such that, when the diaphragm is in a closed position, pressure of a fluid supply opens the valve, and when the diaphragm is in an open position, the pressure of the fluid closes the valve. The valve internals are formed as a single, enclosed piece, with openings provided only for supply and consumption. The pilot-operated diaphragm-type valve uses a return spring for the diaphragm that applies a biasing force to an outside surface of the valve internals. Additionally, an actuator is provided to selectively arrest the diaphragm in an open or closed position by applying force to a different outside surface of the valve internals.

An oscillating diaphragm valve is provided. The valve is configured such that, when the diaphragm is in a closed position, pressure of a fluid supply opens the valve, and when the diaphragm is in an open position, the pressure of the fluid closes the valve. The valve internals are formed as a single, enclosed piece, with openings provided only for supply and consumption. The pilot-operated diaphragm-type valve uses a return spring for the diaphragm that applies a biasing force to an outside surface of the valve internals. Additionally, an actuator is provided to selectively arrest the diaphragm in an open or closed position by applying force to a different outside surface of the valve internals.

The invention relates to a throttling valve comprising a fluid inlet (29) and a fluid outlet (27). The throttling valve is arranged to control a flux of a fluid stream flowing via a flow path from the fluid inlet (29) to the fluid outlet (27). The flow path comprises a plurality of openings (330) which, in use, create a pressure reduction over the throttling valve and thereby a cooling effect of the fluid. The openings (330) widen in a downstream direction.

Valve arrangement for ensuring different amount of medium flow-through comprising at least two chambers (6,7) separated by a limiting wall (3) provided with a through-opening (1). An insertion piece (2) in the through-opening (1) is able to move transversally and the cross-section of its elongated middle portion (4) corresponds to that of the through-opening (1). At least at one end of the insertion piece (2) a closing head (5) is provided. A form-fitting (8) between the closing head (5) and the limiting wall (3) ensures a first closed state thereby a first amount of flow-through from a chamber (6) being on one side of the through-opening (1) to the chamber (7) being on the other side of it when the longitudinal movement of the insertion piece (2) is limited as the closing head (5) abuts against the limiting wall (3) at the through-opening (1).