Before selecting a Air Quick Coupler, important questions must be answered regarding performance: How to Choose the Right Quick Coupling Product Quick Coupling Division
What are the functional requirements of the coupling?
What is the maximum working pressure of the application?
Which seals and body material are compatible with the system’s fluid?
Is the application static or dynamic?
What size coupler/hose is required?
What is the maximum pressure drop suitable for the application?
Does the application require the ability to connect and disconnect under pressure?
What is the media temperature and ambient temperature?
What end configurations are required?
Is an industry interchange coupler required?
Are air inclusion and fluid loss concern in the application?
Once these questions have been answered, a preliminary selection of coupling type can be made: one, two or no shutoff valves, and the type of connecting and disconnect mechanism. Keep in mind that one style may offer the greatest convenience in service, but a different model's lower pressure drop may be more desirable for the application.
Single shut-off couplings
Single shut-off couplings are primarily used for pneumatic or gas applications, connecting air tools, hoses or other implements to compressed air and gas supplies. In these applications, the coupler half (female) is valved while the nipple half (male) is un-valved or “straight-through.” Upon inserting the nipple, it opens the valving on the coupler, which allows flow. When disconnecting the nipple, the valve on the coupler automatically closes which stops the flow from the coupler.
Double shut-off couplings
Both coupling halves are frequently valved in the case of hydraulic applications. Double shut-off couplings minimize fluid leakage while limiting the amount of air, dirt, and water that can become trapped between valves during reconnection. To address these concerns, many manufacturers offer flat-faced couplings that reduce fluid spillage to a drop or less every time the coupling is disconnected.
The impact of employing quick connect couplings will make a difference in any operation where reliability, time and productivity are of the utmost importance. Parker’s Quick Coupling Division is the largest quick coupling manufacturer in the world, providing quick disconnects and accessories that are appropriate for use in countless applications across widespread markets where fluid lines are connected and disconnected. These markets include aerospace, subsea gas and oil exploration, agriculture, electromechanical, filtration, thermal management and all others that require reliable, safe connections.
Many of Parker’s coupling products are available with unique non-standard options well suited to very specific applications. Examples of unusual end-use applications might include: high temperatures (above 250° F), extremely caustic/corrosive solutions passing through the coupling, external/environmental corrosion situations or other high wear and tear situations such as dragging the product along the ground.