A gate valve that opens or closes opening parts of a valve box with a valve plate includes a valve rod that moves upward or downward and tilt inside the valve box; a drive mechanism that moves the valve rod upward or downward by a predetermined stroke and tilts the valve rod; a stopper mechanism that includes a spring return type stopper pin, and in which, when compressed air is supplied, a pin rod of the stopper pin moves forward in a horizontal direction, and a cam plate connected to the valve rod or a load receiving roller attached to the cam plate collides with the pin rod to regulate an upward movement of the valve rod. When the supply of the compressed air is stopped, the pin rod moves backward in the horizontal direction due to a reaction force of the spring, so that the cam plate or the load receiving roller does not collide with the pin rod and the regulation on the upward movement of the valve rod is released; and a vibration reducing device that reduces vibration.

A valve system includes a cam that has a shaft portion with an opening configured to receive a motor shaft, where the opening is off-center within the shaft portion. The system also includes a connecting rod assembly mounted to the shaft portion of the cam, where the connecting rod assembly includes a flexible one-piece connecting rod. The system further includes a valve mounted to an end of the flexible one-piece connecting rod such that rotation of cam results in translation of the 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.

A pair of air cylinders that cause a valve plate to perform an opening/closing operation each include a head-side air cushion mechanism and a rod-side air cushion mechanism. Each head-side air cushion mechanism includes a head-side communication path and a head-side restricting flow path that connect a head-side pressure chamber and a head-side main flow path in parallel, and a blocking mechanism that blocks the head-side communication path when a piston approaches a retreat stroke end, and each rod-side air cushion mechanism includes a rod-side communication path and a rod-side restricting flow path that connect a rod-side pressure chamber and a rod-side main flow path in parallel, and a blocking mechanism that blocks the rod-side communication path when the piston approaches an advance stroke end.

A valve (1), in particular a vacuum valve, with at least one closure member (2) which has a wedge-shaped closure region (3), and with at least one valve seat (5) which surrounds a valve opening (4) of the valve (1), wherein, in a closed position of the closure member (2), the wedge-shaped closure region (3) bears sealingly against the valve seat (5) and closes the valve opening (4) and, in an open position, opens up the valve opening (4) so that fluids and/or solids can be transported through the valve opening (4), wherein the closure member (2) with the wedge-shaped closure region (3) is mounted so as to be movable back and forth between the closed position and the open position along a movement path (6), wherein the movement path (6) is angled-off and/or bent.

A compact vacuum gate valve capable of reducing a kink and sliding between a seal material and a seal surface, achieving a low occurrence of particles, stably and reliably performing valve-body open-close movements, restricting impulsive sound and vibrations, and also having high durability. The vacuum gate valve includes housing bodies, a valve-body open/close driving body, and a stem provided with a valve body. Each of the housing bodies has therein a piston rod and a cam member with a cam groove. On each side of the valve-body open/close driving body, a cam roller and a fulcrum roller are provided. On an inner side of the housing body, a vertical movement guiding part and a stopper part are provided. A spring for causing the valve-body open/close driving body to ascend is provided between the valve-body open/close driving body and a fixed base part on a fixed side.

The invention relates to a device (1) for aligning a solar panel (20) with respect to an installation rail which is attached to a base, in particular a roof, prior to installation. The invention also relates to an assembly comprising at least one solar panel (20) and at least one such device (1) which is coupled to a frame (21) of the solar panel (20). The invention furthermore relates to a method for aligning a solar panel (20), with respect to an installation rail attached to a base, in particular a roof, prior to installation by using at least one such device (1), optionally followed by the installation of the at least one solar panel (20) to the support rail.

The present invention relates to a vacuum valve, and more particularly, to a vacuum valve including a valve housing with a blade, a main shaft, a vertical moving part, a horizontal moving part, a horizontal moving unit, and a main body bracket. Opening and closing guide holes are obliquely formed in both side surfaces such that cam rollers, having passed through the vertical moving guide grooves, are inserted into the grooves so as to guide the fore and aft movement of the blade according to the vertical movement of the horizontal moving unit.

A valve actuating assembly is provided that comprises a cam holder positioned within a valve body of an internal valve, a cam operably coupled to the cam holder and configured to engage a valve stem of the internal valve for moving the internal valve between a first position and a second position, and 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, wherein the actuating shaft is removably coupled to the cam holder such that the actuating shaft can be decoupled from the cam holder and removed from the valve body, the cam holder and the cam being configured to remain positioned within the valve body when the actuating shaft is decoupled from the cam holder and removed from the valve body.

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.