Hydraulic Systems Monitoring
Detect internal leaks, cavitation, and valve issues before they cause downtime.
Hydraulic systems are a critical method of converting electrical power into mechanical energy. A motor-driven pump moves hydraulic fluid through a network that typically includes a reservoir, high-pressure lines, control and isolation valves, relief valves, and cylinders/actuators.
While pumps and motors often receive routine attention, many non-rotating hydraulic components are still maintained in a run-to-failure mode—despite their direct impact on uptime, safety, and process stability. Ultrasound inspection helps close this gap by providing a practical way to detect early-stage hydraulic defects in the field.
Common Hydraulic Failure Modes
- External leakage
- Internal leakage (bypass across seals)
- Blockages and restrictions
- Valve passing / malfunction
Ultrasound is effective because many hydraulic problems generate measurable signatures related to: friction, impacting, and turbulence.
What Ultrasound Can Detect in Hydraulic Systems
Friction indicators may include:
- Pump/motor bearing stress (supporting diagnosis)
- Rod-to-seal or piston-to-barrel rubbing (early wear indicators)
Impacting indicators may include:
- Cavitation on the inlet (vacuum) side of the pump
- Cavitation on the discharge (pressure) side
- Coupling or bearing-related mechanical impacts
Turbulence indicators may include:
- Fluid bypassing a piston seal or wiper seal
- Passing flow across valve bodies (leaking/“passing” valves)
- Bubble activity associated with internal leakage
External vs. Internal Leaks
External leaks are often identified through visual inspection—especially when they are large (ruptured hoses, fittings). However, slow seepage can remain unnoticed for long periods and gradually degrade system performance.
Internal leaks are frequently more detectable with ultrasound. For example, bypass across cylinder seals can create distinct turbulence patterns. Strategic placement of a contact sensor—often downstream of flow behavior—helps pinpoint and trend these issues.
Valve Health & Flow Control
Valves control where pressure and flow go within the system. When valves are blocked, passing, or unstable, system performance drops quickly. Ultrasound can help identify:
- Passing across directional control valves
- Isolation valves that should have no downstream flow
- Turbulence patterns that indicate leak-by or restriction
Comparing readings at multiple points (upstream/on-body/downstream) supports a clearer diagnosis and prioritization.
Rhein Global Approach
- Identify critical hydraulic assets and define inspection points
- Perform ultrasound checks and record baseline levels
- Detect anomalies and classify severity and risk
- Recommend corrective actions and verify after intervention (optional)
Deliverables
- Hydraulic inspection report with findings, severity ranking, and recommendations
- Asset list with inspection points and observations
- Optional re-check after repair/adjustments
- Optional training to help your team sustain the program
Why Rhein Global
Rhein Global is the SDT Ultrasound partner and local representative in Iraq, delivering ultrasound-based reliability services with practical field execution and clear reporting.
Contact Rhein Global to schedule a hydraulic ultrasound assessment and strengthen reliability for critical processes.