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.
Main Components
Coupler (Female Half) – contains a valve mechanism and locking sleeve.
Nipple (Male Half) – mates with the coupler to complete the connection.
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.
Materials
Carbon steel (zinc plated), stainless steel (SS304/SS316), or brass.
Seals in NBR, Viton®, EPDM, or polyurethane, depending on fluid compatibility.
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.
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.
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.
