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    Hydraulics Glossary – B

    A condition or state whereby pipe connections are on normally unexposed hydraulic equipment surfaces.

    The level of pressure on the downstream or return side of a system or component.

    A fabric or plastic device used with an o-ring or other gasket to prevent the o-ring or gasket being forced out into an adjacent space or crevice.

    A plate or mechanical device designed to restrain or regulate the flow of a fluid. A separator found in a reservoir, tank or chamber to divert fluid flow in specific direction(s) for de-aeration of moving fluid. 

    A hydraulic valve that uses a spherical obstruction to stop and start hydraulic flow or divert the flow of fluid in a passage. A ball valve is usually rotated 90 degrees; to open and close. Provides a rugged and reliable sealing surface. Metal to metal sealing resist injury from contamination.

    The measure of pressure in the metric system. One bar = 14.5 psig.

    The portion of fitting inserted into a hose, usually comprised of two or more radial serrations or ridges designed to form a redundant seal between the hose and fitting.

    The radius of the bent section of the hose measured to the innermost surface of the curved portion. Often referred to as the minimum bend radius.    

    A separator or diaphragm, usually found in a chamber to aid the separation of two fluids or gases. 

    A device for removal of pressurized fluid. Used for the removal of air from an oil system.

    To divert a controlled, specific portion of a pump delivery directly to the hydraulic reservoir.  

    Other nomenclature “female half”, “coupler”, “socket”. The receptacle portion of a quick-action coupling which normally includes the mechanism to lock the two quick-action coupling halves together.

    A hydraulic component that converts low hydraulic pressure from a large linear actuator into high pressure in a small linear actuator. Also called intensifiers, boosters are usually two different-sized hydraulic cylinders connected by a common piston.

    The internal diameter of a tube, hose or pipe.

    A form of lubrication between two rubbing surfaces without the development of a full fluid lubricating film.

    A device used in the exhaust line of a hydraulic motor to prevent both over-speeding when an over-running load is applied to the motor shaft and also excessive pressure build-up when decelerating or stopping a load.

    The process of joining metals using a non-ferrous filler metal that has a melting point lower than that of the metals to be joined.

    Automatic separation of a quick-action coupling when an axial separation force is applied.

    A clamping device that holds the quick-action coupling sleeve, allowing the body to move forward upon disconnect within either a single-acting or double-acting sleeve or backward upon connection within a double-acting sleeve.

    A device permitting air movement between the atmosphere and the hydraulic component in which it is installed while preventing contaminants from entering the hydraulic component.

    Indentation marks (dimples) or grooves worn into the shoulder of the quick-action coupling male half by the locking (detent) balls in the female half.

    The measure of a hydraulic fluid’s resistance to compressibility.

    The pressure at which a device (pipe, tube or hose) fails, losing its ability to contain pressure. Normally 4 times working pressure.

    A secondary passage for the flow of fluid.

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    This is a system generated translation and as such will not be fully accurate. We are not responsible for incorrect or inaccurate translations and will not be held responsible for any damage or issues that may result from using this service.