Details

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A High Pressure Hydraulic Coupling is a quick-connect device designed for joining and disconnecting hydraulic lines under high pressure without significant fluid loss or air ingress.
It is widely used in construction, industrial machinery, oil & gas, and maintenance equipment where reliable, leak-free connections are essential in high-pressure systems.

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Construction

1. Main Components

   • Coupler (Female Half) – contains a valve mechanism and locking sleeve.

   • Nipple (Male Half) – mates with the coupler to complete the connection.

2. Valve Design

   • Poppet Valve – prevents fluid loss during disconnection.

   • Flat Face – minimizes fluid spillage and dirt ingress, easy to clean.

   • Ball or Pin Type – for heavy-duty and pulsating pressure applications.

3. Materials

   • Carbon steel (zinc plated), stainless steel (SS304/SS316), or brass.

   • Seals in NBR, Viton®, EPDM, or polyurethane, depending on fluid compatibility.

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Typical Specifications

• Size Range: 1/4" to 2" (DN6 – DN50).

• Working Pressure: 3,000 psi to 10,000+ psi (207 – 690+ bar).

• Burst Pressure: 4× working pressure (typical).

• Flow Capacity: Depends on size; measured in L/min or GPM.

• Temperature Range: –40 °C to +120 °C standard (higher with special seals).

• Connection Types: Push-to-connect, threaded sleeve, or screw-to-connect for extra security.

• Standards: ISO 7241-A, ISO 7241-B, ISO 16028, or manufacturer-specific high-pressure series.

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Applications

• Construction Machinery – excavators, loaders, hydraulic breakers.

• Industrial Presses – hydraulic tools, presses, and torque wrenches.

• Oil & Gas – high-pressure testing, hydraulic power units.

• Agriculture – hydraulic attachments and implements.

• Maintenance & Service – portable hydraulic equipment for field repairs.

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Advantages

• Quick & Safe Connection – minimizes downtime during equipment changeover.

• Leak-Free Operation – prevents oil loss and environmental contamination.

• Durable – resistant to vibration, pressure spikes, and heavy use.

• Versatile – available in multiple styles and materials for different applications.

• High Safety – screw-to-connect types handle residual pressure safely.