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Quick Connect Couplings | Streamlining Connections

Applications and connection types

Quick connect couplings with hydraulic and pneumatic functions can be employed in a range of settings and applications. Further, they are used in construction equipment, forestry, mining, oil and gas, mobile equipment, agricultural machinery, automotive systems, hydraulic tools and systems, and military applications.

There are various quick connect coupler connectors, each with a unique function and layout.

• Manual connect:In hydraulic applications, these couplings can be connected and disconnected without the need for tools. When fastening, users need to draw the sleeve back; this is typically done with two hands.
• Push-to-connect:Users only need to push the two halves together to establish a straightforward connection with push-to-connect couplings. This can be done with one hand because the sleeve does not need to be pulled back during attachment. Applications requiring frequent connecting and disconnecting can use these connectors.
• Screw-to-connect couplings: sometimes called thread-to-connect couplings, are threaded in design. Thus, Screw-to-connect couplings are perfect for high pressure, high cycle applications because of the exterior threads on the male nipple and the receiving threads on the female coupler, which decrease the possibility of an inadvertent disconnection caused by vibration.

Types of hydraulic couplings include:

• General purpose
• Non-spill
• Connect under pressure
• High pressure
• High flow
• Miniature

Pressure ranges

Rated pressure for the MB Exports hydraulic couplings range from 30 to 15,000 psi, depending on the coupling series, size, and materials. Rated pressures are defined by ISO 5598 as “the qualified operating pressures which are recommended for a component or a system by the manufacturer.”

STAMP process

When choosing the proper quick-connect coupling, we recommend using the STAMP process:

• Size: Selecting the right connection depends on your system’s requirements as well as those of other parts, such as hoses, pipes, pumps, etc. Performance and proper flow are impacted by incorrect size.
• Temperature: When choosing a coupling, note the two temperatures: the media temperature (the temperature of the media being sent through the system) and the ambient temperature (the outside temperature).
• Application: Determine whether the application involves high vibration or impulse, indoor or outdoor use, dynamic or static pressure, etc. Selecting the ideal coupling set for your requirements is made easier by posing these queries up front.
• Media: The coupling type needs to be appropriate for the content it transmits. A media compatibility table available from MB Exports indicates which materials are suggested based on coupling.
• Pressure: It’s important to understand the functioning pressure of the system as well as any surges or spikes in pressure. Additionally, There are offered couplings rated at pressure so you can select the appropriate product for your system. “The qualified operating pressures which are recommended for a component or a system by the manufacturer” is how ISO 5598 defines rated pressure.

Choices consist of:

• Brass
• Steel
• Stainless steel
• Heat-resistant plastics
• Zinc-coated
• Carbon-based steel
• Plastic

It is essential to comprehend the fast connection coupling’s ratings and standards in order to choose the material that will work best for your system.

Evaluate the hydraulic, fluid, or pneumatic system parameters against these ratings and restrictions. This covers predicted connect/disconnect cycles as well as ranges and limits for pressures, temperatures, flow rates, volume, and pressure surges.

Since metal fittings have high pressure ratings, they are typically utilised in hydraulic systems. Plastics are less robust and long-lasting than metals, but they naturally resist corrosion better, which makes them less appropriate for hydraulic systems.

Carbon steel is strong and has a high temperature resistance. Thus, usually combined with other metals to enhance its strength, hardness, and other characteristics, carbon steel is an alloy made of iron and carbon.

Carbon steel fittings are occasionally given external protective coatings, such as zinc, phosphate, and cadmium, to increase their service life in hostile conditions.

Standard alternatives include brass fittings and stainless steel fittings for low-pressure applications. It is not advised to cover steel with zinc or another protective coating in situations where low toxicity and low corrosion are necessary, such as in food or beverage applications.

Lighter metals are available for lower-pressure applications, such as, aluminum for more lightweight applications needing corrosion resistance and brass fittings, which work best at lower temperatures and pressures.