A fluid flow regulator comprises a body, an actuatable switch, and valve structure. The valve structure is disposed within the body and has at least a portion movable between an actuating position and a non-actuating position. The actuating position actuates the switch. The non-actuating position does not actuate the switch.

A fluid flow regulator comprises a body, an actuatable switch, and valve structure. The valve structure is disposed within the body and has at least a portion movable between an actuating position and a non-actuating position. The actuating position actuates the switch. The non-actuating position does not actuate the switch.

A safety arrangement of at least one of a marine and an offshore application includes a control device and a valve arrangement configured to be positioned in a flow path between a hydraulic cylinder and a pressure accumulator. The control device is configured to control the valve arrangement according to at least one function, in particular a safety function. The valve arrangement includes a main valve that is operable to control a flow along the flow path. A method of controlling the safety arrangement includes controlling the valve arrangement with the control device.

A safety arrangement of at least one of a marine and an offshore application includes a control device and a valve arrangement configured to be positioned in a flow path between a hydraulic cylinder and a pressure accumulator. The control device is configured to control the valve arrangement according to at least one function, in particular a safety function. The valve arrangement includes a main valve that is operable to control a flow along the flow path. A method of controlling the safety arrangement includes controlling the valve arrangement with the control device.

A vacuum-based energy-saving large-capacity precision pressure regulation valve includes a base valve seat, a middle valve seat, and a pressure regulation seat. The base valve seat includes a main channel that receives a primary-side pressure and a secondary-side pressure to flow therein and includes a valve port piston arranged in the base valve seat to form a valve port opening. The valve port piston is rotatably coupled to a sealing straight rod that is coupled to a main diaphragm. The main diaphragm is clamped between the middle valve seat and the base valve seat to form a vacuum pressure chamber. A balance diaphragm is clamped between the middle valve seat and the pressure regulation seat. An atmosphere passage is connected to a space below the balance diaphragm. A guide passage and a feedback passage are in communication with the vacuum pressure chamber and the main channel.

A pressure relief module, such as a rupture disk module or a burst panel module, is disclosed. A pressure relief module may comprise a first membrane (10) configured to seal an opening of a contained system and configured to burst open when a pressure in the contained system reaches a predetermined burst pressure. A second membrane (20) may be joined to the first membrane to form a membrane interspace (30) with the first membrane. The membrane interspace (30) may be configured to prevent a backpressure in the contained system from changing the burst pressure required to burst open the first membrane (10). A pressure relief module may provide advantages for a low-pressure enclosure and/or to provide temperature stability and/or backpressure stability.

A three-way valve assembly, including a valve body having a fluid flow path and a valve member movable in the fluid flow path between a supply port and a work port, and between a load sense passage and a pressure relief port. The valve member may move between a first position and a second position for controlling flow and regulating fluid pressure differences sensed in the flow path; and for limiting fluid pressure in the flow path to a predetermined pressure level set by a pilot-operated pressure limiter valve when the valve member is in the second position. The valve member may move between the second position and a third position to open the flow path from the load sense passage to the pressure relief port for relieving fluid pressure in the flow path when the fluid pressure from an over-loaded actuator exceeds the predetermined pressure level set by the pressure limiter valve.

A three-way valve assembly, including a valve body having a fluid flow path and a valve member movable in the fluid flow path between a supply port and a work port, and between a load sense passage and a pressure relief port. The valve member may move between a first position and a second position for controlling flow and regulating fluid pressure differences sensed in the flow path; and for limiting fluid pressure in the flow path to a predetermined pressure level set by a pilot-operated pressure limiter valve when the valve member is in the second position. The valve member may move between the second position and a third position to open the flow path from the load sense passage to the pressure relief port for relieving fluid pressure in the flow path when the fluid pressure from an over-loaded actuator exceeds the predetermined pressure level set by the pressure limiter valve.

A relief valve device includes: a valve housing that includes a communication passage, which communicates between a first pressure chamber and a second pressure chamber, and a relief chamber, which is configured to communicate with the second pressure chamber; a partition wall that is formed in an inside of the valve housing and partitions between the communication passage and the relief chamber; a first valve member that is configured to block and enable flow of fluid between the first pressure chamber and the communication passage; a first urging member that urges the first valve member; a second valve member that is configured to block and enable flow of the fluid between the second pressure chamber and the relief chamber; and a second urging member that urges the second valve member.

A relief valve device includes: a valve housing that includes a communication passage, which communicates between a first pressure chamber and a second pressure chamber, and a relief chamber, which is configured to communicate with the second pressure chamber; a partition wall that is formed in an inside of the valve housing and partitions between the communication passage and the relief chamber; a first valve member that is configured to block and enable flow of fluid between the first pressure chamber and the communication passage; a first urging member that urges the first valve member; a second valve member that is configured to block and enable flow of the fluid between the second pressure chamber and the relief chamber; and a second urging member that urges the second valve member.