A valve for a hydrogen tank of a fuel cell vehicle includes a first open hole for communicating with a tank-side flow passage, a blocking body for blocking the tank-side flow passage, and a second open hole that allows the tank-side flow passage to communicate with a pipe-side flow passage formed at a pilot plunger. As the pilot plunger ascends in the state in which the first open hole communicates with the tank-side flow passage, the tank-side flow passage is blocked by the blocking body and subsequently communicates with the pipe-side flow passage via the second open hole, thereby reducing the size of a section in which a pressure difference occurs between the flow passages and reducing the time taken to eliminate the pressure difference, thus securing stable supply of hydrogen from a hydrogen tank to a fuel cell.

A valve comprising a body with an inlet, an outlet and a passage fluidly interconnecting the inlet and outlet; a shut-off device of the passage, with an actuating member movable along a longitudinal axis; a hand operating device of the actuating member, for selectively opening or closing the passage, and comprising a support element and a rotating element with at least one contact surface configured for sliding along at least one ramped surface on the support element, or vice versa, so as to convert rotation of the rotating element into a translation of the actuating member; wherein the body comprises two arms extending longitudinally and diametrically opposed relative to the longitudinal axis, with distal ends holding the support element.

A valve for a hydrogen tank of a fuel cell vehicle includes a first open hole for communicating with a tank-side flow passage, a blocking body for blocking the tank-side flow passage, and a second open hole that allows the tank-side flow passage to communicate with a pipe-side flow passage formed at a pilot plunger. As the pilot plunger ascends in the state in which the first open hole communicates with the tank-side flow passage, the tank-side flow passage is blocked by the blocking body and subsequently communicates with the pipe-side flow passage via the second open hole, thereby reducing the size of a section in which a pressure difference occurs between the flow passages and reducing the time taken to eliminate the pressure difference, thus securing stable supply of hydrogen from a hydrogen tank to a fuel cell.

A rigid piston assembly for use in a conventional flush valve includes a rigid piston and a solenoid configured to fixedly engage within the valve body. A flush valve for a plumbing fixture as well as a method of retrofitting a piston valve into a diaphragm flush valve body which includes a rigid piston and solenoid configuration.

A rigid piston assembly for use in a conventional flush valve includes a rigid piston and a solenoid configured to fixedly engage within the valve body. A flush valve for a plumbing fixture as well as a method of retrofitting a piston valve into a diaphragm flush valve body which includes a rigid piston and solenoid configuration.

A rigid piston assembly for use in a conventional flush valve includes a rigid piston and a solenoid configured to fixedly engage within the valve body. A flush valve for a plumbing fixture as well as a method of retrofitting a piston valve into a diaphragm flush valve body which includes a rigid piston and solenoid configuration.

A flushometer valve includes a hollow body and a piston assembly disposed inside the hollow body for controlling operation of the flushometer valve. The piston assembly and hollow body define an inlet chamber, an outlet chamber and a pressure chamber. The piston assembly includes a flow guide, a piston top, and an insert. The flow guide is movable relative to the hollow body between an open position, in which the outlet chamber is fluidly connected to the inlet chamber, and a closed position, in which the outlet chamber is fluidly disconnected from the inlet chamber. The piston top is coupled to the flow guide, includes a first material, and has a bleed passage that fluidly connects the pressure chamber and the inlet chamber. The insert is disposed within the bleed passage, includes a second material, and has a bore that fluidly connects the bleed passage and the pressure chamber.

A rigid piston assembly for use in a conventional flush valve includes a rigid piston and a solenoid configured to fixedly engage within the valve body. A flush valve for a plumbing fixture as well as a method of retrofitting a piston valve into a diaphragm flush valve body which includes a rigid piston and solenoid configuration.

A rigid piston assembly for use in a conventional flush valve includes a rigid piston and a solenoid configured to fixedly engage within the valve body. A flush valve for a plumbing fixture as well as a method of retrofitting a piston valve into a diaphragm flush valve body which includes a rigid piston and solenoid configuration.

A rigid piston assembly for use in a conventional flush valve includes a rigid piston and a solenoid configured to fixedly engage within the valve body. A flush valve for a plumbing fixture as well as a method of retrofitting a piston valve into a diaphragm flush valve body which includes a rigid piston and solenoid configuration.