Multi-Functional Assembly Test Pump

The Multi-Functional Assembly Test Pump occupies a unique and critical role in the industrial manufacturing ecosystem. Every pressure vessel, heat exchanger, valve body, pipe fitting, pipeline section, hydraulic cylinder, aerospace actuator, and process instrument that leaves a factory requires verified proof of structural and functional integrity before it enters service — and that verification depends entirely on a reliable, accurate, and controllable source of pressurised fluid. The MAT series is engineered specifically to be that source, delivering precisely controlled pressure and flow across the widest operating envelope of any comparable test pump platform, with the instrumentation accuracy, safety system completeness, and operational flexibility required by the most demanding international testing standards.

What distinguishes the MAT series from a conventional industrial pump pressed into test service is its fundamental design philosophy: test-first, not process-first. A conventional process pump is designed to deliver a rated flow at a rated head continuously and reliably — its design optimises for those two steady-state parameters. A test pump must do something far more demanding: it must deliver precisely controlled pressure from near-zero to maximum test pressure, hold that pressure stable for extended periods regardless of specimen leakage compensation, ramp pressure at controlled rates for fatigue and proof testing cycles, generate the exact flow rates required by flow coefficient (Cv) testing standards, and do all of this while connected to test specimens whose internal volumes, compliance characteristics, and failure modes are unknown and variable. The MAT series is designed specifically to excel at this dynamic, variable, and precision-demanding duty.

The MAT series is built on a modular multi-pump circuit architecture that provides separately controllable high-pressure/low-flow and low-pressure/high-flow hydraulic circuits within a single integrated test bench unit. The high-pressure circuit — driven by a precision positive-displacement plunger or gear pump — provides test pressures from 0.1 MPa to 700 MPa (in the highest-range configurations) with pressure resolution of ±0.1% FS and flow rates from 0.01 L/min to 50 L/min, suited to proof testing of small-bore pressure vessels, instrument valves, hydraulic components, and aerospace actuators. The low-pressure/high-flow circuit — driven by a centrifugal pump stage — provides flows from 1 m³/h to over 500 m³/h at pressures up to 10 MPa, suited to hydrostatic testing of large-diameter pipelines, heat exchanger tube bundles, and storage vessel shells. Both circuits share a common fluid reservoir, filtration system, temperature control unit, and instrumentation data acquisition system, with a pneumatically actuated circuit selection manifold allowing either or both circuits to be connected to the test specimen simultaneously for complex multi-point test configurations.

Pressure control precision is the defining performance parameter of a test pump, and the MAT series addresses it through a closed-loop electro-hydraulic pressure regulation system. A high-resolution pressure transducer (0.05% FS accuracy, 10,000 Hz sampling rate) continuously monitors test pressure and feeds the measurement to a PID control algorithm in the MAT digital control unit (DCU). The DCU adjusts pump speed (via VFD for the centrifugal stage), proportional relief valve position, or servo-controlled needle valve orifice area to maintain pressure at the setpoint with a regulation accuracy of ±0.25% of setpoint from 10% to 100% of maximum test pressure. For pressure cycle testing (repeated pressure-hold-release cycles for fatigue qualification testing), the DCU executes pre-programmed pressure profiles with ramp rates from 0.01 MPa/s to 50 MPa/s, enabling both quasi-static proof testing per ASME VIII, EN 13445, and ISO 10380 standards, and dynamic fatigue cycle testing per ASTM E466, ISO 1143, and aerospace fatigue qualification schedules.

The test fluid management system is engineered to the same precision standard as the hydraulic circuits. The MAT series includes a stainless steel test fluid reservoir (capacity 200 L to 5,000 L depending on configuration), an inline fluid temperature control system (heating and cooling) that maintains fluid temperature at any setpoint from 5 °C to 95 °C (±1 °C accuracy), a multi-stage filtration system with particulate removal to 3 µm for hydraulic fluid cleanliness per ISO 4406, and a dissolved-gas management system that deaerates the test fluid before use — critical for accurate compressibility calculations in high-pressure testing and for eliminating cavitation damage in precision pump internals. For test applications requiring specific test fluids (petroleum products, glycol solutions, synthetic hydraulic fluids, or corrosive liquids), the MAT reservoir and wetted components are available in SS316L construction with PTFE-lined fittings to maintain fluid purity and prevent contamination of the test specimen.

Data acquisition and test documentation are integrated into the MAT design at the architecture level — not added as afterthoughts. The MAT Digital Control Unit (DCU) simultaneously acquires data from up to 64 channels of pressure, temperature, flow, displacement, and strain measurement at sampling rates up to 10,000 samples/second per channel. All test data is recorded in real time to the embedded industrial PC, with automatic test report generation in PDF and CSV formats at the conclusion of each test. Test reports include: time-stamped pressure-time and flow-time traces, pass/fail evaluation against user-defined acceptance criteria, calibration traceability data for all instruments used, operator identification, and specimen serial number — providing the complete audit trail required by quality management systems, pressure vessel safety regulations, and aerospace certification authorities.

Safety engineering is integral to the MAT design from first principles. The test pump operates at pressures that can store enormous amounts of hydraulic energy in test specimens and connecting pipework — energy that must be safely contained and controlled at all times. The MAT safety system provides three independent layers of overpressure protection: a software pressure limit in the DCU that cuts pump power if measured pressure exceeds the setpoint by more than 5%; a hardwired electronic pressure switch that operates independently of the DCU software on a separate safety relay circuit; and a calibrated mechanical relief valve set at 110% of maximum test pressure that provides final physical protection against any failure of the electronic systems. All three protection layers are tested at every start-up cycle, and any detected failure prevents the test from proceeding — ensuring that the safety system cannot be defeated by a single-point electronic failure.

Every MAT series test pump is manufactured under ISO 9001:2015 quality management certification, calibrated against NIST-traceable reference standards, and supplied with a complete calibration certificate covering all measurement channels. For applications subject to regulatory oversight (pressure vessel manufacturer qualification per ASME Section IX, pipeline hydrostatic testing per ASME B31.3/B31.8, or aerospace component qualification per MIL-STD-810), the MAT calibration documentation provides the instrument traceability evidence required by regulatory audit teams and third-party inspection bodies.