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Glossary of Terms Appendices Air Inclusion: The ambient atmosphere forced into the system Pressure Impulse Test: Subjecting a component to a during the connection of the quick disconnect halves. specified pressure at a specified rate of increase or decrease for a specified time limit. Break-Away: Automatic disconnection of a coupling when an axial separation force is applied. Pressure Operating: The pressure at which a system is operated. Brinelling: Dimples or grooves worn into the shoulder of a male half by the locking balls in the female half. Pressure Plug: Plug which incorporates a seal capable of withstanding the rated pressures on the female half. Burst Pressure: The pressure at which a device loses the capability to retain pressure. Proof Pressure: The non-destructive test pressure in excess of the maximum rated operating pressure. Case Hardening: Hardening the surface of low carbon steel.. PushTo Connect (Auto Lock): Locking arrangement which Cold Flow: Continued deformation under load. permits one handed connection by pushing the nipple into the coupler. Connect Under Pressure: Ability to connect coupling halves with internal line pressure applied to either both sides Rated Pressure: The maximum pressure at which a product is or one side. designed to operate. Coupling, Female Half: Other nomenclature "coupler", Single-Acting Sleeve: Permits pull-to-disconnect convenience "socket", "body". on implement line when female body is clamp mounted. Making connection requires manually pulling female body Coupling, Male Half: Other nomenclature "nipple", forward, inserting male tip, then allowing body and tip to return "plug", "adapter". to original position in the clamp. Coupling, Quick Disconnect: A component which can Sleeve Lock: Arrangement which provides an additional quickly join or separate a fluid line without the use of tools or lock which must be actuated before the locking sleeve can special devices. be retracted. Differential Pressure (P): The difference in pressure Spillage: The fluid removed from the system due to between any two points of a system or a component. disconnection of a coupling assembly. This is the fluid trapped Double-Acting Sleeve: Permits push-to-connect and pull-to- between the mating seal and the valve seal of the coupling disconnect convenience on implement line when female half is halves. clamp mounted and connected with a hose. Surge Pressure: The pressure existing from surge conditions. Dust Cap: Dust or dirt repelling enclosure for both halves. Surge Flows: A rapid increase in fluid flow. Dust Plug: Dust or dirt repelling enclosure both halves. Thermal Build-Up: Hydraulic pressure caused by Flow Checking: Occurs when a nipple valve closes during expansion of the fluid due to heat from an external source such flow conditions, such as when quickly lowering a heavy as sunlight. implement. (Also called Check Off, Back Checking or Lock-up.) Trapped Pressure: Pressurized hydraulic fluid trapped behind Flush Position (Valve): When the coupler valve is fully open, closed coupling valve allowing maximum oil flow. Twist Lock: A locking arrangement which requires a rotational Force to Connect: Axial and/or rotational force required to actuation to unlock the mating halves. Appendices make a complete connection. Types of Quick Disconnect CouplingValves Force to Disconnect: The reverse of the above. Straight-Thru (ST): This provides straight through flow. Induction Hardening: Localized hardening of medium Double Shut-off Valve (DSO): A valve in the female half and a carbon steel. valve in the male half. Peak Pressure: Maximum momentary pressure encountered Single Shut-offValve (SSO): Generally, a valve in the female in the operation of a component. half with no valve in the male half. Pressure Cap: Cap which incorporates a seal capable of NOTE: Refer to Parker's Publication No.3800-B1.0: Safety Guide for Selecting withstanding the rated pressures on the male half. and Using Quick Action Couplings and Related Accessories. Parker Hannifin Corporation Quick Coupling Division IV-1 Minneapolis, MN 55427
Goodyear Rubber Products
