Air Inclusion: The ambient atmosphere forced into the system during the connection of the quick disconnect halves.
Break-Away: Automatic disconnection of a coupling when an axial separation force is applied.
Brinelling: Dimples or grooves worn into the shoulder of a male half by the locking balls in the female half.
Burst Pressure: The pressure at which a device loses the capability to retain pressure.
Case Hardening: Hardening the surface of low carbon steel.
Cold Flow: Continued deformation under load.
Connect Under Pressure: Ability to connect coupling halves with internal line pressure applied to either both sides or one side.
Coupling, Female Half: Other nomenclature “coupler”, “socket”, “body”.
Coupling, Male Half: Other nomenclature “nipple”, “plug”, “adapter”.
Coupling, Quick Disconnect: A component which can quickly join or separate a fluid line without the use of tools or special devices.
Differential Pressure (ΔP): The difference in pressure between any two points of a system or a component.
Double-Acting Sleeve: Permits push-to-connect and pull-to-disconnect convenience on implement line when female half is clamp mounted and connected with a hose.
Dust Cap: Dust or dirt repelling enclosure for both halves.
Dust Plug: Dust or dirt repelling enclosure both halves.
Flow Checking: Occurs when a nipple valve closes during flow conditions, such as when quickly lowering a heavy implement.(Also called Check Off, Back Checking or Lock-up.)
Flush Position (Valve): When the coupler valve is fully open, allowing maximum oil flow.
Force to Connect: Axial and/or rotational force required to make a complete connection.
Force to Disconnect: The reverse of the above.
Induction Hardening: Localized hardening of medium carbon steel.
Peak Pressure: Maximum momentary pressure encountered in the operation of a component.
Pressure Cap: Cap which incorporates a seal capable of withstanding the rated pressures on the male half.
Pressure Impulse Test: Subjecting a component to a specified pressure at a specified rate of increase or decrease for a specified time limit.
Pressure Operating: The pressure at which a system is operated.
Pressure Plug: Plug which incorporates a seal capable of withstanding the rated pressures on the female half.
Proof Pressure: The non-destructive test pressure in excess of the maximum rated operating pressure.
Push To Connect (Auto Lock): Locking arrangement which permits one handed connection by pushing the nipple into the coupler
Rated Pressure: The maximum pressure at which a product is designed to operate.
Single-Acting Sleeve: Permits pull-to-disconnect convenience on implement line when female body is clamp mounted. Making connection requires manually pulling female body forward, inserting male tip, then allowing body and tip to return to original position in the clamp.
Sleeve Lock: Arrangement which provides an additional lock which must be actuated before the locking sleeve can be retracted.
Spillage: The fluid removed from the system due to disconnection of a coupling assembly. This is the fluid trapped between the mating seal and the valve seal of the coupling halves.
Surge Pressure: The pressure existing from surge conditions.
Surge Flows: A rapid increase in fluid flow.
Thermal Build-Up: Hydraulic pressure caused by expansion of the fluid due to heat from an external source such as sunlight.
Twist Lock: A locking arrangement which requires a rotational actuation to unlock the mating halves.
Types of Quick Disconnect Coupling Valve:
Straight-Thru (ST): This provides straight through flow.
Double Shut-off Valve (DSO): A valve in the female half and a valve in the male half.
Single Shut-off Valve (SSO): Generally, a valve in the female half with no valve in the male half.
Adapter: A component that connects two different types or sizes of couplings or fittings.
Ball Valve: A type of valve with a spherical closure unit that provides tight shutoff and control over fluid flow.
Breakaway Coupling: A safety device that automatically disconnects when a certain amount of force is applied, preventing spills and damage in emergency situations.
Coupler: The part of the quick coupling system that receives and locks the plug (nipple) to create a secure connection.
Disconnect: The process of separating the two parts of a quick coupling.
Dry Break Coupling: A type of quick coupling designed to prevent spillage and fluid loss during disconnection.
Female Coupling: The half of the quick coupling that has an internal thread or connection, typically referred to as the “socket” or “coupler.”
Hydraulic Coupling: A type of quick coupling specifically designed for use in hydraulic systems, allowing for easy connection and disconnection of hydraulic lines.
Interchangeability: The ability of different brands or types of couplings to connect with each other due to standardized dimensions and specifications.
Locking Mechanism: A feature of quick couplings that ensures the connection remains secure and prevents accidental disconnection.
Male Coupling: The half of the quick coupling that has an external thread or connection, typically referred to as the “plug” or “nipple.”
Nipple: The male part of the quick coupling that inserts into the coupler to form a connection.
Non-Spill Coupling: A type of quick coupling that minimizes fluid loss and spillage during connection and disconnection.
O-Ring: A circular sealing element typically made of rubber or other elastomeric materials used to prevent leaks at the connection points of couplings.
PSI (Pounds per Square Inch): A unit of pressure measurement commonly used to specify the operating pressure range of quick couplings.
Quick Coupling: A device that allows for the fast and easy connection and disconnection of fluid lines without the need for tools.
Quick Disconnect: A term often used interchangeably with quick coupling, emphasizing the ease of disconnection.
Self-Sealing: A feature of some quick couplings that automatically seals the fluid path when disconnected to prevent leaks.
Sleeve: The outer part of a quick coupling that is typically pulled back to release the plug and disconnect the coupling.
Thread Size: The specific measurement of the threads on the male and female parts of the coupling, crucial for ensuring proper fit and connection.
Valved Coupling: A quick coupling that incorporates valves to automatically open and close the fluid path upon connection and disconnection, respectively.
Working Pressure: The maximum pressure at which a quick coupling is designed to operate safely under normal conditions.
