Fluid Gas Handling

Redefining Working Under Pressure with Screw-to-Connect Couplings

Redefining Working Under Pressure with Parker’s Screw-to-Connect Couplings Construction Equipment Quick Coupling DivisionThe performance of heavy equipment and machinery is dependent on the reliability of every component. Whether in the factory or out in the field, the failure of a single mechanical element means downtime for repair or replacement. If the fix requires connecting or disconnecting hydraulic lines under pressure—and without fluid loss—rendering the machine operational presents unique challenges. The solution? Screw-to-connect quick couplings.

Putting trust in strong and reliable coupling connections even under the most demanding conditions is vital to improved performance and the prevention of unnecessary maintenance. Parker’s screw-to-connect couplings are engineered to take the pressure and make even the most demanding applications manageable.

Screw-to-connect couplings

Redefining Working Under Pressure with Parker’s Screw-to-Connect Couplings Mining Equipment Quick Coupling DivisionParker has developed two coupling products that are changing the industry standard for reliability, ease of connection and safety: the FET Series and the 59 Series. Designed and built for use in high-pressure, high-impulse applications requiring secure, easy connection and the ability to connect and disconnect under pressure, these screw-to-connect couplers far outperform any standard coupler on the market today. Standard couplers are difficult to connect or disconnect if trapped pressure is present, so operators must first shut down their equipment to release all system pressure, which leads to undesired downtime in the field.

Screw-to-connect couplers thread together easily while under pressure by securely releasing oil and transporting it to an internal chamber. This allows for connections with pressure on both / either the nipple and coupler side up to 5,000 psi. Manufactured from high-grade materials with a durable design and stainless-steel valve, the FET Series is interchangeable with other similar thread-to-connect couplers with superior impulse resistance.


Let’s take a closer look at both of these products.

FET series

Designed to provide interchangeability with similar high-pressure thread-to-connect couplings by other manufacturers, FET Series features include non-spill valves, durability and high impulse resistance. Plus, they require only seven turns of the threaded sleeve to provide a full connection.  


59 series

Redefining Working Under Pressure with Parker’s Screw-to-Connect Couplings FEt and 59 Series Quick Coupling DivisionParker's 59 Series is the premiere thread-to-connect coupling for high impulse hydraulic applications. The rugged Acme threads are resistant to damage and have a double-start feature to quickly align the threads, which saves valuable time. As few as 2 ½ sleeve rotations will complete a full connection. The 59 Series features an integrated swivel function on the coupler body which eases the frustration of dealing with hose twist while under pressure. The Parker 59 Series is uniquely engineered to provide a faster, cleaner and easier connection for any heavy-duty application.

This coupler offers additional advantages such as the bright orange O-ring which is concealed by the sleeve when connected; you can also feel when the coupler and nipple are fully mated, giving both a visual and tactile confirmation of a secure connection. Truly engineered to perform, the 59 Series has an internal bearing to reduce hose twist and facilitate connection to pressurized fluid lines.


Working under pressure

Parker has redefined the phrase “working under pressure” by developing reliable, high-pressure couplers that enhance performance across a multitude of industrial applications with the added benefits of safety, reliability and easy installation.


Watch our video to learn more about connecting under pressure.



Learn more here about Parker's Screw-to-connect solutions.


Parker’s screw-to-connect couplings are available for purchase on www.parker.com. Simply add products to your cart for shipment within two days for in-stock items.


Redefining Working Under Pressure with Parker’s Screw-to-Connect Couplings Lori Aus Quick Coupling DivisionArticle contributed by Lori Aus, senior product sales manager, Quick Coupling Division, Parker Hannifin.






Related articles:

How to Choose the Right Quick Coupling

Check Valves Are the Unsung Heroes of Fluid Power

Screw-to-Connect Couplings Make Hard Work Easier



Have a question about Parker products or services? We can help: Contact Us!

Comments for Redefining Working Under Pressure with Screw-to-Connect Couplings

Please note that, in an effort to combat spam, comments with hyperlinks will not be published.

Leave a comment