The valve device includes: a valve casing that includes a valve casing main body, in which an inlet flow path, an intermediate flow path, and an outlet flow path are formed, and a lid portion that closes an external opening portion formed in the valve casing main body; an intermediate valve seat portion that is detachable from the valve casing main body; a strainer that extends in a direction connecting the lid portion and the intermediate valve seat portion and is disposed between the lid portion and the intermediate valve seat portion; and an energizing member that is disposed between the strainer and the intermediate valve seat portion and is energized the intermediate valve seat portion toward the valve casing main body. The strainer is disposed with the energizing member pressed toward the valve casing main body.

An actuation trigger for a device, comprising or including, A dose chamber to hold a charge of high pressure working fluid, received from a high pressure source, A dose valve, biased closed to seal the dose chamber off from a working chamber, and hold the charge in the dose chamber, A hammer operated by a piston with a driven chamber on a first side of the piston, and a trigger chamber on a second side of the piston, sealed from the first side, the driven chamber receiving high pressure working fluid directly or indirectly from the high pressure source, A trigger valve to selectively supply high pressure working fluid to the trigger chamber, or to release high pressure working fluid from the trigger chamber, Such that when the hammer has high pressure working fluid in both the driven chamber and the trigger chamber it is held by a force imbalance in a first position, and when the high pressure working fluid is released from the trigger chamber, the hammer is driven to, or towards a second position towards the trigger chamber, The hammer, when driven to, or towards the second position strikes the dose valve, unseating the dose valve to unseal the dose chamber and the working chamber thus allowing the charge to enter the working chamber to do work therein.

An actuation trigger for a device, comprising or including, A dose chamber to hold a charge of high pressure working fluid, received from a high pressure source, A dose valve, biased closed to seal the dose chamber off from a working chamber, and hold the charge in the dose chamber, A hammer operated by a piston with a driven chamber on a first side of the piston, and a trigger chamber on a second side of the piston, sealed from the first side, the driven chamber receiving high pressure working fluid directly or indirectly from the high pressure source, A trigger valve to selectively supply high pressure working fluid to the trigger chamber, or to release high pressure working fluid from the trigger chamber, Such that when the hammer has high pressure working fluid in both the driven chamber and the trigger chamber it is held by a force imbalance in a first position, and when the high pressure working fluid is released from the trigger chamber, the hammer is driven to, or towards a second position towards the trigger chamber, The hammer, when driven to, or towards the second position strikes the dose valve, unseating the dose valve to unseal the dose chamber and the working chamber thus allowing the charge to enter the working chamber to do work therein.

In a valve (10) having a pneumatic or hydraulic drive unit (20), the drive unit (20) includes a cylinder (22), a piston (24), a spindle unit (26) mounted for axial movement in the cylinder (22), and a housing cover (28), the piston (24) dividing the interior of the cylinder (22) into a cover-side space (42) and a valve seat-side space (40), and a duct (66) within the spindle unit (26) leading to the valve seat-side space (40). Formed in the housing cover (28) are a fluid intake (44) and a fluid exit (46) as well as a pressure fluid duct (48) in fluid communication with the fluid intake (44) and an outlet duct (50) in fluid communication with the fluid exit (46). The pressure fluid duct (48) branches into two partial ducts (54, 56), a first partial duct (54) extending through the spindle unit (26) into the valve seat-side space (40) and opening out there, and a second partial duct (56) opening out into the cover-side space (42), and a closure body (68) being provided which seals either the first partial duct (54) or the second partial duct (56) in a fluid-tight manner. Furthermore, a modular system (70) and a method for manufacturing valves (10) are indicated.

In a valve (10) having a pneumatic or hydraulic drive unit (20), the drive unit (20) includes a cylinder (22), a piston (24), a spindle unit (26) mounted for axial movement in the cylinder (22), and a housing cover (28), the piston (24) dividing the interior of the cylinder (22) into a cover-side space (42) and a valve seat-side space (40), and a duct (66) within the spindle unit (26) leading to the valve seat-side space (40). Formed in the housing cover (28) are a fluid intake (44) and a fluid exit (46) as well as a pressure fluid duct (48) in fluid communication with the fluid intake (44) and an outlet duct (50) in fluid communication with the fluid exit (46). The pressure fluid duct (48) branches into two partial ducts (54, 56), a first partial duct (54) extending through the spindle unit (26) into the valve seat-side space (40) and opening out there, and a second partial duct (56) opening out into the cover-side space (42), and a closure body (68) being provided which seals either the first partial duct (54) or the second partial duct (56) in a fluid-tight manner. Furthermore, a modular system (70) and a method for manufacturing valves (10) are indicated.

A sub-plate mounted valve for installation in a sub-plate or manifold for controlling hydraulic systems, such as subsea blowout preventers. A spool (123) disposed within the valve is movable between an open position in which fluid flow is permitted from a supply port (108) of the manifold to a function port (106) of the manifold, and a closed position in which fluid flow is permitted between a return port (110) of the manifold and the function port (106). The spool (123) is moved between the open and the closed position by supplying pressurized fluid to a piston (126) disposed on the outside surface of the spool. One or more springs (130) may also act on the piston to bias the spool into the open or the closed position. To facilitate proper alignment of the valve within the manifold, the valve may be rotated within the manifold to align indicators (450, 452) corresponding to particular features of the manifold and the valve.

A hydraulic actuator to which a limit-adjustable mechanical lock device is applied, comprising: a housing having a first hole; side covers coupled at both sides of the housing, and having holder insertion holes formed to be opened toward the first hole side of the housing, and plugs; a first holder of which one side of the outer peripheral surface is inserted into the holder insertion hole at the plug side of the side cover by screw coupling; a second holder fitted and coupled to the inner peripheral surface of the side cover and having one end thereof screw-coupled to the second hole of the first holder; a locking means into which a rod is inserted so as to be movable in an axial direction at a predetermined distance across the second hole of the first holder and the third hole of the second holder.

A powered actuating assembly configured for mounting on a tubular valve body. The actuating assembly includes: (a) an actuator unit configured to impart torque to the valve stem; (b) an actuator mounting plate with a first surface supporting the actuator unit and a second surface configured to engage and resist movement relative to the valve body; and (c) securing links configured to extend around a valve body surface opposite the mounting plate and secure the mounting plate to the valve body.

A valve device includes: an opening and closing section capable of being switched between an open state and a closed state, and a drive section having a rectilinearly moving mechanism configured to move a rectilinearly movable member in forward and backward directions; a transmission section configured to bring the opening and closing section to the closed state when the rectilinearly movable member is moved forward and to bring the opening and closing section to the open state when the rectilinearly movable member is moved backward; and a switching section capable of being switched between a connected state in which the movement of the rectilinearly movable member in the forward and backward directions is able to be transmitted to the transmission section and a disconnected state in which the movement of the rectilinearly movable member in the forward and backward directions is unable to be transmitted to the transmission section.

A valve device includes a body having a fluid passage formed therein, a valve element configured to open and close the fluid passage, a stem arranged to be configured to move toward and away from the valve element to cause the valve element to open and close the fluid passage, an actuator having a casing coupled to the body, and drive unit arranged in the casing to drive the stem by an operating fluid supplied from outside, and a valve mechanism provided at the casing and configured to open and close a passage of the operating fluid to the drive unit.