Proposed are directional control hydraulic valves and a system including the same, the system including: a first valve controlling a flow of a fluid flowing thereinto from a first input port by being interlocked with a solenoid valve that is switched to an excited (on) state or non-excited (off) state; and a second valve connected to the first valve and controlling a flow of the fluid flowing thereinto from the first valve by a fluid flowing thereinto from a second input port or a third input port, wherein at least a part of the fluid having been passed through the first valve is discharged through a first output port and then flows into the second input port or the third input port. In addition, the system including at least two directional control valves may be provide, whereby multiplexing of the system may be implemented.

The invention relates to a 3-port valve for passing fluids therethrough, having a valve body, a port, a first sub-port and a second sub-port, with the port being adjoined by a main line which ends in a connecting region, said first sub-port having a first sub-port line that is connected to the connecting region, said second sub-port having a second sub-port line that is connected to the connecting region, with at least one valve member being arranged in the connecting region, which valve member can be displaced along a valve member axis between an opening position and a closed position thereof in the connecting region, so that, in a first valve position, the port is fluidically connected to the first sub-port, in a second valve position, the port is fluidically connected to the second sub-port, in a third valve position, the port is fluidically connected to both the first and second sub-ports, in a fourth valve position, the port is fluidically connected neither to the first sub-port nor to the second sub-port. The invention is characterized in that the valve body is formed from a high-tempered steel, or other suitable material, with the valve body being produced from a solid ingot and with the connecting region, the main port, the first sub-port line and the second sub-port line having been machined into the steel ingot. Heat transfer medium lines for passing a HTM therethrough are also machined into the same valve body to regulate the temperature of the fluid. Simultaneously or alternatively, electric heating cartridge receptacles may be machined into the valve body ingot.

A servo valve for precisely controlling a position of a pneumatic cylinder does not require a servo amplifier and a small sized and/or high durability servo valve unit. The servo valve comprises a unit body having first and second portions, first and second valve portions, first and second seal members that open and close the first and second valve portions, respectively, first and second drive mechanisms that drive first and second seal members by first and second electric pulses, respectively, a supply flow path between the first end and first valve, an exhaust flow path between the second end and second valve, a common flow path connected to the supply and exhaust flow paths via first and second valve portions, and a drive flow path connected to the pneumatic actuator. First and second drive mechanisms are arranged in a drive mechanism arrangement portion located between first and second end portions.

A servo valve for precisely controlling a position of a pneumatic cylinder does not require a servo amplifier and a small sized and/or high durability servo valve unit. The servo valve comprises a unit body having first and second portions, first and second valve portions, first and second seal members that open and close the first and second valve portions, respectively, first and second drive mechanisms that drive first and second seal members by first and second electric pulses, respectively, a supply flow path between the first end and first valve, an exhaust flow path between the second end and second valve, a common flow path connected to the supply and exhaust flow paths via first and second valve portions, and a drive flow path connected to the pneumatic actuator. First and second drive mechanisms are arranged in a drive mechanism arrangement portion located between first and second end portions.

A valve device having a valve housing (10), in which fluid ports (P, A, T) are provided and in which at least one valve piston (12, 14) can be moved longitudinally, which valve piston either separates at least two of the fluid ports (P, A, T) from one another or interconnects them as a function of its travel position, and having at least one latching device (16, 18) for each valve piston (12, 14) for the detachable fastening of the respective valve pistons (12, 14) in one of its travel positions, which latching device has at least one latching means (20), which can be brought into a latching position (22), which is characterized in that, as part of the respective latching devices (16, 18) for detachably fastening the respective valve pistons (12, 14), at least one control body (24) that can be moved independently of the respective valve pistons (12, 14) is provided, which control body is set up such that, in at least one blocking position, it prevents the relevant latching means (20) disposed in the latching position (22) from leaving the latching position (22) by blocking the latching means (20) is disclosed.

A valve device having a valve housing (10), in which fluid ports (P, A, T) are provided and in which at least one valve piston (12, 14) can be moved longitudinally, which valve piston either separates at least two of the fluid ports (P, A, T) from one another or interconnects them as a function of its travel position, and having at least one latching device (16, 18) for each valve piston (12, 14) for the detachable fastening of the respective valve pistons (12, 14) in one of its travel positions, which latching device has at least one latching means (20), which can be brought into a latching position (22), which is characterized in that, as part of the respective latching devices (16, 18) for detachably fastening the respective valve pistons (12, 14), at least one control body (24) that can be moved independently of the respective valve pistons (12, 14) is provided, which control body is set up such that, in at least one blocking position, it prevents the relevant latching means (20) disposed in the latching position (22) from leaving the latching position (22) by blocking the latching means (20) is disclosed.

A valve block includes a fluid-transfer plate with multiple inlet bores connecting to a common inlet channel, and multiple outlet bores connecting to a common outlet channel. The inlet bores and the outlet bores are arranged in a curved shape. The valve block also includes a pressure plate and diaphragm aligned and connected to the fluid-transfer plate in a way that allows pressurized material in the pressure plate to control the state of the channels formed by the inlet and outlet bores.

A valve block includes a fluid-transfer plate with multiple inlet bores connecting to a common inlet channel, and multiple outlet bores connecting to a common outlet channel. The inlet bores and the outlet bores are arranged in a curved shape. The valve block also includes a pressure plate and diaphragm aligned and connected to the fluid-transfer plate in a way that allows pressurized material in the pressure plate to control the state of the channels formed by the inlet and outlet bores.

A hydraulic multi-way valve with independent oil-port control, includes a multi-way valve body, an A valve core and a B valve core. The multi-way valve body has an A oil port and a B oil port, and includes an A cavity and a B cavity independent from each other therein. The A oil port, a P high-pressure oil port and a T high-pressure oil port are all in communication with the A cavity, the B oil port, the P high-pressure oil port and the T high-pressure oil port are all in communication with the B cavity. The A valve core is arranged in the A cavity, and the B valve core is arranged in the B cavity.

A hydraulic multi-way valve with independent oil-port control, includes a multi-way valve body, an A valve core and a B valve core. The multi-way valve body has an A oil port and a B oil port, and includes an A cavity and a B cavity independent from each other therein. The A oil port, a P high-pressure oil port and a T high-pressure oil port are all in communication with the A cavity, the B oil port, the P high-pressure oil port and the T high-pressure oil port are all in communication with the B cavity. The A valve core is arranged in the A cavity, and the B valve core is arranged in the B cavity.