What does hydraulic circuit mean? A constituent part of a hydraulic device with a certain function composed of various hydraulic components.

What does circuit diagram mean? A hydraulic circuit diagram represented by hydraulic graphic symbols.

What does hydraulic power unit mean? A hydraulic source device composed of a hydraulic pump, a drive motor, an oil tank, a relief valve, etc., or a hydraulic device including control valves.

What does rated pressure mean? The highest pressure that can be continuously used.

What does back pressure mean? The pressure acting on the return side of a hydraulic circuit or in the opposite direction of the pressure acting surface.

What does impact pressure mean? The maximum value of the rising pressure during the transition process.

What does opening pressure mean? For components such as check valves or relief valves, the pressure at which the valve begins to open and a certain flow rate is reached when the pressure rises.

What does closing pressure mean? For components such as check valves or relief valves, the pressure at which the inlet pressure of the valve drops and the valve begins to close and the flow rate decreases below a specified amount.

What does rated flow mean? The flow rate ensured under certain conditions.

What does flow mean? Generally refers to the volume of liquid output by a hydraulic pump per unit time.

What does displacement mean? The volume of liquid output (or input) per revolution of a positive displacement hydraulic pump (or motor).

What does fluid power mean? The power possessed by a fluid. For hydraulics, it is actually represented by the product of flow rate and pressure.

What does pipeline mean? A conduit and piping system for conducting working fluid.

What does main pipeline mean? Includes suction pipelines, pressure pipelines and return pipelines.

What does drain pipeline mean? Refers to the return oil pipeline for drainage or the pipeline that leads it back to the oil tank.

What does passage mean? A channel through which fluid is conducted inside or through an element. An opening at which fluid is conducted in a passage of an element.

What does throttling mean? An institution that reduces the flow cross-sectional area and creates resistance inside a pipeline or channel. There are long-channel throttling and thin-edge throttling.

What does spool-type spool (cylindrical spool) mean? A part that cooperates with a cylindrical sliding surface and opens and closes the flow path when it moves axially.

What does drain oil mean? Oil returning from a channel (or pipeline) in a hydraulic component to an oil tank or collector, or the phenomenon of such oil returning.

What does oil leakage mean? A small amount of oil flowing out from a part that should be sealed under normal conditions.

What does static seal mean? Used for stationary parts to prevent fluid leakage.

What does dynamic seal mean? Used for sealing relative sliding parts.

What does fluid jamming phenomenon mean? Inside a spool valve or the like, due to the non-uniformity of flow, an unbalanced pressure distribution on the central axis is generated, pressing the spool against the valve body (or valve sleeve), making it unable to move.

What does cavitation phenomenon mean? The pressure of flowing liquid drops to the saturation vapor pressure or air separation pressure in a local range, and bubbles are generated due to the generation of steam and the separation of dissolved air, etc. This is the cavitation phenomenon. When bubbles collapse during flow, ultra-high pressure will appear locally and noise will be generated.

What does flow jump phenomenon mean? In a speed control valve (a flow control valve with pressure compensation), when fluid begins to flow, there is a phenomenon that the flow momentarily exceeds the set value.

What does chatter mean? A higher frequency vibration added to reduce the influence of friction and fluid jamming phenomena on spool valves and improve their characteristics.

What does hydraulic balance mean? Use hydraulic pressure to balance the load (including the equipment itself).

What does fluid power transmission device mean? A device that uses fluid as a medium to transmit power.

What does inlet throttling mode mean? A throttling valve is installed in the pipeline on the inlet side of the actuator to adjust the operating speed by throttling.

What does outlet throttling mode mean? A throttling valve is installed in the pipeline on the outlet side of the actuator to adjust the operating speed by throttling.

What does bypass throttling mode mean? A part of the flow flowing to the actuator is returned to the oil tank through a throttling valve installed in the bypass pipeline to adjust the operating speed of the actuator.

What does electro-hydraulic mode mean? A mode in which electrical components such as electromagnets are combined into a hydraulic manipulator.

What does pilot control mode mean? A control mode by pressure introduced by a pilot valve or the like.

What does hydraulic transmission device mean? A device that uses the pressure energy of fluid to transmit power. In this device, positive displacement hydraulic pumps and hydraulic actuators (hydraulic cylinders or hydraulic motors) are used.