The present invention discloses an electronic flush valve system for tankless water fixtures, comprising a valve housing and a replaceable flush valve module removably secured within the valve housing. The flush valve module is comprised of an independent, self-contained flush valve configured as a replaceable flush valve cartridge.

The present invention discloses an electronic flush valve system for tankless water fixtures, comprising a valve housing and a replaceable flush valve module removably secured within the valve housing. The flush valve module is comprised of an independent, self-contained flush valve configured as a replaceable flush valve cartridge.

A valve (1), in particular a piston valve, including a stationary housing part (2) and an actuating element (3) which can be adjusted relative to the housing part (2) and is in, or can be brought into, an operative connection with a valve body (4). The valve body (4) can be adjusted by way of actuation of the actuating element (3) between an open position which opens an outlet (5) and a closed position which closes the outlet (5). The valve (1) has a damping device (6) for extending a closing time of the valve (1), by an adjusting force which is applied for the closure of the valve (1) being opposed by a damping force which is produced by way of the damping device.

A flush valve has a valve body having an inlet and an outlet, and a piston disposed in the valve body between the inlet and the outlet. A surface is disposed in the valve body for seating the piston. The surface tapers inwardly as it passes into the outlet wherein the taper improves the flow characteristics of fluid passing by the taper thereby minimizing water hammer and leakage therethrough.

A flush valve has a valve body having an inlet and an outlet, and a piston disposed in the valve body between the inlet and the outlet. A surface is disposed in the valve body for seating the piston. The surface tapers inwardly as it passes into the outlet wherein the taper improves the flow characteristics of fluid passing by the taper thereby minimizing water hammer and leakage therethrough.

There is provided a flush water tank apparatus capable of returning to a state where next toilet flush operation can be started in a short time while opening a discharge valve using a water supply pressure. A flush water tank apparatus (4) includes a reservoir tank (10), a discharge valve (12), a discharge valve hydraulic drive portion (14) configured to drive the discharge valve using a water supply pressure, and a discharge/vacuum break valve device (30) provided on an upstream side of the discharge valve hydraulic drive portion and configured to supply the water supplied from the upstream side to the discharge valve hydraulic drive portion on a downstream side. The discharge valve hydraulic drive portion includes a cylinder (14a) into which the water from the discharge/vacuum break valve device flows, and a piston (14b) configured to be moved by a pressure of the water flowing into the cylinder to move the discharge valve. The discharge/vacuum break valve device includes a valve body that operates to discharge the water flowing backward from the discharge valve hydraulic drive portion while opening the upstream side to an atmosphere when the supply of the water from the upstream side is stopped.

There is provided a flush water tank apparatus capable of returning to a state where next toilet flush operation can be started in a short time while opening a discharge valve using a water supply pressure. A flush water tank apparatus (4) includes a reservoir tank (10), a discharge valve (12), a discharge valve hydraulic drive portion (14) configured to drive the discharge valve using a water supply pressure, and a discharge/vacuum break valve device (30) provided on an upstream side of the discharge valve hydraulic drive portion and configured to supply the water supplied from the upstream side to the discharge valve hydraulic drive portion on a downstream side. The discharge valve hydraulic drive portion includes a cylinder (14a) into which the water from the discharge/vacuum break valve device flows, and a piston (14b) configured to be moved by a pressure of the water flowing into the cylinder to move the discharge valve. The discharge/vacuum break valve device includes a valve body that operates to discharge the water flowing backward from the discharge valve hydraulic drive portion while opening the upstream side to an atmosphere when the supply of the water from the upstream side is stopped.

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.