Hydraulic Proof Pressure Test Rig, rated to 700 bar / 10,000 psi.

Introduction

Every high-pressure system depends on components that must not fail under extreme hydraulic stress. A single weak link, such as a leaking connector or an under-strength valve, can compromise an entire assembly. The Neometrix Hydraulic Proof Pressure Test Rig eliminates such risks by verifying that each component can safely endure pressures far exceeding its rated operating level, subjecting the item under test to controlled overpressure -- typically 1.5 to 2.0 times its maximum operating pressure -- and holding that pressure for a defined dwell time.

Function & testing principle

The rig performs hydrostatic proof testing in accordance with international and defence-grade standards. It applies controlled hydraulic pressure using mineral oil or compatible test fluid and monitors the pressure decay or deformation response over time; the pressure ramp, dwell duration, and depressurization rate are fully programmable through a PLC-based control system. The rig's methodology aligns with:

• ISO 19879: hydraulic fittings and connectors.
• ISO 1402: rubber and thermoplastic hoses.
• SAE J343 / J517: hydraulic hose assemblies.
• EN 12266-1: valve pressure tests.
• ASTM E1003: hydrostatic leak test method.
• MIL-STD-810: environmental and structural qualification for defence hardware.

Each test cycle is logged automatically with time-stamped data, forming part of the component's quality record.

Mechanical & hydraulic architecture

Frame and enclosure:

• Fabricated steel frame with powder-coated finish for corrosion resistance.
• Stainless steel (SS304) test chamber with drain outlet and splash-proof lid.
• Integrated viewing window for safe operator observation.
• Door interlocks and safety switches prevent pressurization when open.
• Compact footprint with vibration-damped caster base for ease of movement.

Hydraulic power unit:

• Multi-pump configuration driven by three electric motors: a high-pressure pump for main proof testing, a low-pressure charging pump for prefill and flushing, and a return pump for circulation and cooling.
• Duplex filter assembly (10 µm and 3 µm) on pressure and return lines.
• Dual oil tanks (operational and clean return) with level gauges, breathers, and sampling ports.
• Stainless-steel manifolds, seamless tubing, and high-pressure fittings rated above 700 bar.
• Precision pressure control valves and mechanical relief valves for overpressure protection.

Control and instrumentation:

• Industrial PC (Advantech S10) integrated with an AOC industrial monitor for the human-machine interface.
• PLC-based automation for sequence control and interlocking.
• Real-time display of pressure, temperature, and flow parameters.
• Pressure transducers with ±0.25% FS accuracy, calibrated to traceable standards.
• High-precision analog gauge for redundant safety verification.
• Programmable test sequences: fill → ramp → hold → depressurize.
• Data logging software for generating automatic test certificates.

Test sequence

• Component installation: the test specimen is mounted using appropriate hydraulic connectors and adaptors.
• Filling and air purge: the low-pressure pump fills the component and removes trapped air.
• Pressure ramp: hydraulic pressure is increased smoothly to the set proof pressure.
• Dwell: the proof pressure is held for a specified time while the system monitors stability and leakage.
• Depressurization: the system automatically vents pressure in a controlled manner.
• Evaluation: data logs are analyzed and a digital report is generated indicating pass/fail results.

The process is fully automated to ensure repeatability and operator safety.

Safety features

• Mechanically interlocked and electrically monitored front door.
• Independent overpressure relief valve and rupture disc.
• Emergency stop circuit for instant depressurization.
• High-pressure rated fittings, hoses, and manifolds.
• Stainless-steel spill tray and drainage system.
• System grounded and fused as per IEC 61010 and CE guidelines.
• Operator protection through full enclosure and transparent observation window.

Optional features

• Dual-pressure range configuration for low- and high-pressure testing.
• Automatic data acquisition and certificate generation software.
• Integration with barcode or RFID-based test tracking.
• Remote monitoring capability via Ethernet or VPN.
• Temperature control for oil conditioning during proof test.
• Custom chamber dimensions and fixture designs for special components.

Documentation & deliverables

• Factory Acceptance Test (FAT) documentation and calibration certificates.
• Operation and maintenance manual with hydraulic schematics.
• IQ/OQ documentation templates.
• Recommended spares and fixture list.
• Electrical and PLC wiring diagrams.
• Risk and hazard analysis report in accordance with CE/PED directives.

Conclusion

The Neometrix Hydraulic Proof Pressure Test Rig is a precision-engineered, fully enclosed test system for verifying the pressure integrity of hydraulic components. Built with a dual-tank oil system, multi-stage filtration, and a PLC-controlled automation interface, it ensures safe and repeatable proof testing up to 700 bar, with real-time data logging, automatic certificate generation, and redundant safety features that comply with ISO, SAE, EN, ASTM and MIL-STD methodologies -- built for critical aerospace, defence, and industrial applications.