A flow direction restriction valve mechanism unit includes a pressure decreasing valve assembly that is located to freely advance or retract in a combination valve cassette attached to an in-outlet secondary side flow path formed on the side of an outlet with respect to an intermediate transmission member in a flow path, and retracts by a pressure of gas; a first coil spring urging the pressure decreasing valve assembly in a retracting direction; a check valve that is located to be freely advance or retract with respect to the pressure decreasing valve assembly, and retracts by a pressure of the gas; and a second coil spring urging the check valve in an advancing direction. A gas induction passage is formed in which the gas flows and acts on the pressure decreasing valve assembly such that the pressure decreasing valve assembly moves in the advancing direction.

A hydraulic striking device that is mounted on construction equipment such as an excavator and breaks solid rocks in the grounds using a rod that is hit by a piston is proposed. Particularly, a hydraulic striking device that can automatically switch stroke modes by sensing the intensity of pressure of an upper chamber formed at an upper portion between a piston and a cylinder in accordance with the statuses of rocks in the ground is proposed.

A valve assembly and fluid arrangement for continuous delivery of volumetrically proportioned gases or like fluids includes a valve assembly and a volumetric fluid storage bank, which has first and second sets of fluid storage chambers. The valve assembly alternately supplies a consumer with a blend of gases from the first set of fluid storage chambers while charging the second set of fluid storage chambers from pressurized gas sources, and, upon a threshold depletion of gases from the first set of chambers, supply the consumer with a blend of gases from the second set of fluid storage chambers while charging the first set of fluid storage chambers from the gas sources. Upon the threshold depletion of gases from the second set of chambers, the valve assembly again supplies mixed gases from the first set of chambers while charging the second set of chambers, and the process repeats.

Embodiments described herein relate to a flow meter assembly. The inline flow meter assembly includes a housing, an elongated flow member, and a piston. The housing includes a fluid passage. The elongated flow member has a shaft portion and an opposite fluid flow portion. The fluid flow portion has an outer peripheral surface. The shaft portion is coupled to the housing. The piston has a plate. The plate has a plate orifice. The piston and the plate move axially between a no flow position where the outer peripheral surface of the fluid flow portion is engaged with the plate orifice to prevent a fluid flow and a full flow position where the outer peripheral surface of the fluid flow portion is disengaged with the plate orifice such that the fluid flow enters the plate orifice and passes through the fluid passage in the axial direction of movement of the piston.

A time delay valve includes a switching valve that switches between a first position and a second position; an urging member that urges the switching valve toward the first position; a driving mechanism that urges the switching valve toward the second position located opposite the first position in the presence of the pressure of a pilot fluid being supplied; a pilot flow channel that introduces the pilot fluid to the driving mechanism; and a delaying mechanism that delays the switching timing of the switching valve. The delaying mechanism includes a first throttle valve provided on the pilot flow channel, a compensation mechanism that urges the switching valve toward the first position in the presence of the pressure of the pilot fluid being supplied, and a compensation flow channel that is branched from the pilot flow channel to introduce a portion of the pilot fluid to the compensation mechanism.

A valve for hydraulic control of fluid flow rate, comprising: a body provided with an inlet opening, an outlet opening and an actuating opening; a rotating hollow shutter rotatively housed inside said body, said rotating shutter being configured to be crossed by a fluid and to change the passage cross-section inside the valve, in which the rotating shutter comprises at least one first opening rotatively cooperating with at least one mated second eccentric opening, said rotating shutter being configured to be manually actuatable inside the body so that a rotation of said first opening with respect to said second opening is matched by a variation of the fluid passage cross-section in a direction substantially coinciding with the rotation axis.

The present invention is a flow-rate adjustable valve for adjusting a flow rate of liquid flowing through a flow path. The flow-rate adjustable valve includes: a main valve body; a back pressure chamber; an inlet hole; an outlet hole; a pilot valve body for opening and closing an end of the outlet hole on a side of the back pressure chamber; an elongated member holding the pilot valve body; and a lifter rotatable and also movable in the axial direction of the elongated member by the rotation of the rotatable member. The lifter and the elongated member are integrally movable in the axial direction. The elongated member is connected to the lifter under a condition in which the elongated member is biased to the lifter in a one-way direction of the axial direction by a biasing-connecting member.

A pressure-operated check valve assembly for a fuel tank inerting system includes a valve body having a fluid flow path between an inlet and an outlet, a plurality of poppets arranged in series in the fluid flow path, and an actuator in the valve body that is movable in response to fluid pressure in the valve body to actuate open the poppets or enable the poppets to close. Each poppet may be movable in the flow path independent of the other poppets to thereby provide independent and redundant functionality. The poppets may be normally biased toward closed, and activation of the actuator in response to fluid pressure being greater than a predefined threshold level may cause the actuator to overcome the biasing force of the poppets to urge the poppets to open. A flow restrictor downstream of the poppets may facilitate buildup of upstream pressure to enable low cracking pressure.

A hydraulic control unit (4) includes a valve bush (12), a valve cover (15) partially closing the valve bush (12) on an end face (S1), a valve slide (13) guided in a longitudinal direction (L) within the valve bush (12), and a housing part (6). The housing part (6) includes a recess (8) matching an external contour of the valve bush (12). An intermediate plate (7) is configured to partially cover the valve cover (15). A spring (14) is arranged within the valve bush (12) and preloads the valve slide (13) in a starting position. The valve bush (12) is inserted, together with the valve cover (15), the valve slide (13), and the spring (14), into the recess (8) of the housing part (6) and jointly form a hydraulic valve (9). The valve bush (12) forms an inlet (19), and the valve cover (15) forms an outlet (31).

A hydraulic striking device that is mounted on construction equipment such as an excavator and breaks solid rocks in the grounds using a rod that is hit by a piston is proposed. Particularly, a hydraulic striking device that can automatically switch stroke modes by sensing the intensity of pressure of an upper chamber formed at an upper portion between a piston and a cylinder in accordance with the statuses of rocks in the ground is proposed.