A first opening and closing mechanism, which includes a first cam groove and a first cam roller and which causes a valve assembly to reciprocate between an intermediate position and a first closed position, and a second opening and closing mechanism, which includes a second cam groove and a second cam roller and which causes the valve assembly to reciprocate between the intermediate position and a second closed position, are provided so as to be operable separately, the first and second opening and closing mechanisms being disposed adjacent to each other in a thickness direction D of a gate valve.

Particle scattering is suppressed only by controlling the gate valve in opening the gate valve with the internal pressure of the chamber being matched to the atmospheric pressure. A method of controlling a gate valve is characterized in that, in a gate valve that presses its valve body to an opening of a chamber by detecting a torque of a motor that drives the valve body, the method comprises the following steps: acquiring in advance a local maximum of the torque at the time of decompressing the inside of the chamber with the valve body closed under the atmospheric pressure, detecting the torque when a vent gas is being introduced into the chamber before returning the inside of the chamber to the atmospheric pressure for opening the valve body, opening the valve body when the torque exceeds the local maximum of the torque so that a clearance is created between the valve body and the opening of the chamber, and opening fully the valve body after the particles are discharged together with the gas inside the chamber.

Aspects of the disclosure relate to an overload protection valve for automatic release of a load. The valve may include an outer housing having an end wall, a cam, and inner slide, and an overload spring. The inner slide may include a side wall, a shelf area, an inlet and an outlet. Each of the inlet and outlet may include an opening through the side wall, and the inlet and the outlet may be separated by the shelf area. The overload spring may be arranged between the end wall and the shelf area, and may define a load on the valve which will cause the valve to open. The cam may be configured such that when the valve is closed, the defined load will cause the cam to rotate thereby allowing the openings of the inlet and outlet to be in fluid communication with one another and open the valve.

A bidirectional gate valve including: a blade (200) installed in a valve housing (100) having first and second passage holes (110, 120) to open/close the first and second passage holes (110, 120); a shaft (300) coupled to a lower portion of the blade (200); a first driving block (400) including: a first cylinder (410) which is provided under the valve housing (100) and into which the shaft (300) is inserted; a first piston (420) installed inside the first cylinder (410) and coupled to a lower portion of the shaft(300) to vertically move the shaft (300) according to pressure change inside the first cylinder (410).

A valve actuating assembly A valve actuating assembly for actuating an internal valve between a closed position and an open position is provided. The valve actuating assembly comprises a cam holder stem securely connected to a valve body of the internal valve; a cam holder operably coupled to the cam holder stem; a cam operably mounted to the cam holder; an actuating shaft extending through at least a portion of the valve body, rotation of the actuating shaft causing rotation of the cam holder and the cam; and a locking ring configured to rotatably secure the cam holder to the cam holder stem, wherein the actuating shaft is removably coupled to the cam holder such that the actuating shaft can be removed from the valve body while the cam and cam holder remain coupled to the valve body.

A water control system including a showerhead and a tub faucet. The faucet has a valve configured to automatically restrict fluid flow through the faucet and direct fluid to the showerhead as a function of a parameter, such as a predetermined water temperature. The faucet has many modes of operation, including a Reset Mode, an Auto-Divert Mode, a Bypass Mode, and a Cold Mode. A flow control device generates minimal back-pressure when in the Reset Mode such that water does not undesirably back flow to a shower head.

A rotary disc valve includes a guide assembly having a ring-shaped member having a groove disposed in an inner surface thereof, and a valve disc assembly rotatably coupled to the guide assembly. The valve disc assembly includes a valve disc, a projection received within the groove of the guide assembly, and a chimney support coupled to the guide assembly. The chimney support includes a seal member for selectively sealing against the valve disc. The groove has a main portion perpendicular to a longitudinal axis of the rotary disc valve, and an angled portion at an oblique angle with respect to the longitudinal axis. When the valve is moved between a closed and open positions the valve disc assembly is rotated and moves the projection along the angled portion of the groove, thereby moving the valve disc toward and away from the seal.

A thermal management control valve includes a first housing defining a first fluid chamber, a second housing coupled to the first housing and defining a second fluid chamber, a rotary actuator having a drive shaft that defines a drive axis, a cam coupled to the drive shaft and having a cam slot, and a louver plate sealed between the first housing and the second housing and having a plurality of louver slots extending through the louver plate along a louver flow direction. The louver plate is coupled to the cam slot so that rotation of the cam selectively moves the louver plate along a radial direction relative to the drive axis. The radial direction is perpendicular to the louver flow direction.

Disclosed are a water softener valve and a water softener. The water softener valve includes a valve body, a spacer group, and a piston assembly, the piston assembly including a piston body and a piston rod. The piston assembly defines a water passage through two ends of the piston assembly, the outer peripheral surface of the piston body is alternately defined with a plurality of sealing surfaces and communicating grooves along a press-in direction; the spacer group and the inner peripheral surface of an valve cavity of the valve body forms a plurality of gate grooves arranged along the press-in direction; the valve cavity is defined with a proximal cavity and a distal cavity respectively adjacent to the proximal end and the distal end of the spacer group along the press-in direction.

Disclosed are a water softener valve and a water treatment apparatus. The water softener valve includes: a valve body, a multi-way valve, a saline solution suction and water injection valve and a driving mechanism, the saline solution suction and water injection valve including a first valve rod, the driving mechanism including a mounting seat and a cam, the end of the first valve rod extending out of the valve body being transmission cooperated with the cam, wherein, the mounting seat is defined with a sliding connection structure, the outer end of the first valve rod is sliding fit with the sliding connection structure along the longitudinal direction, and the outer end of the first valve rod is position-limiting cooperated with the sliding connection structure along the lateral direction; the longitudinal direction coincides with the length direction of the first valve rod.