Pneumatic Test Rig, altitude simulation verified to 60,000 feet.

Why altitude simulation testing matters

The Vacuum Test Rig is a precision-engineered testing platform designed for simulating high-altitude conditions in controlled environments. Developed specifically for the aerospace sector, it replicates atmospheric pressures corresponding to altitudes up to 60,000 feet (18.2 km), enabling the rigorous evaluation of aerospace valves and components. It supports critical test procedures such as leakage detection, pressure response verification, and real-time flow-rate analysis. Its robust construction, integrated safety systems, and optional automation make it an indispensable tool for aerospace OEMs, MROs, and test labs.

1. Dual-chamber architecture & construction

The rig is built around two independent chambers — a cabin pressure chamber that simulates pressurized internal aircraft conditions, and an altitude chamber that mimics external atmospheric conditions. Both are constructed from SS304-grade stainless steel with a volume of ~0.55 ± 0.1 m³ each, allowing realistic inter-compartment pressure differentials to be simulated and measured.

2. Vacuum generation & flow control

• Vacuum pump: High-capacity system capable of achieving 72 mBar absolute pressure.
• Motor: 30 HP, 3-phase squirrel-cage induction motor, 415V, 50Hz.
• VFD: Enables precise pump control and altitude profiling.
• Modulating valves: Electro-pneumatically actuated for smooth flow adjustment.
• Manual valves: For isolation and safety control.
• Buffer tank: 1 ± 0.2 m³ vacuum accumulator for stable pressure control, feeding an adjustable flow range of 0.3–20 kg/min.

3. Instrumentation & control systems

The rig employs high-precision instrumentation for real-time monitoring and analysis:

• Pressure transmitters: 0–4 Bar (abs), 0–16 Bar (gauge), from WIKA, Bronkhorst, and Siemens.
• Differential pressure sensors: Up to 500 mBar.
• Manometers: Water-filled and mercury-filled.
• Flow meters: Digital, real-time measurement devices.
• Digital displays: Real-time pressure, flow, and vacuum readings, with manual controls for on-the-fly adjustments and safety interlocks that disable the system if unsafe conditions are detected.

4. Safety features

• Pressure relief valves: Auto-activation to prevent overpressure conditions.
• Emergency stop: Quick system shutdown in critical situations.
• Interlock systems: Ensure safe operation and prevent unauthorized testing.

5. Compliance & certifications

• Design compliance: ANSI B16.5 Class #150 piping and fittings.
• Valve integrity: ANSI/FCI Class IV leakage standards.
• Quality assurance: Manufactured in ISO 9001, ISO 14001, ISO 45001-certified facilities.
• Standards support: MIL-STD-810 (altitude testing), RTCA DO-160 (environmental conditions), ASTM F37 (gasket sealability), ISO 8573-1 (compressed air quality), ISO 12100/IEC 60204-1 (machinery safety). Custom certification packages available for CE, UL, or aerospace-specific validations on request.

Utility requirements

• Compressed air: 12 kg/cm² clean and dry air.
• Cooling water: 45 LPM continuous flow for vacuum pump cooling.
• Electrical supply: 415V, 3-phase, 50Hz.
• Installation space: Sufficient room for chamber access, maintenance, and ventilation.

Maintenance & support

Routine maintenance includes daily inspection of pump oil and belt tension, a cooling system check before each operation, functional testing of safety interlocks and actuators, and sensor calibration and valve responsiveness checks.

Documentation provided: Operation & Maintenance Manual, Electrical & Pneumatic Circuit Diagrams, Assembly & Layout Drawings, Calibration Certificates, Preventive Maintenance Schedule.

Spare parts availability: OEM parts for valves, sensors, pumps, and motors, with optional kits for pressure transmitters, actuator parts, seals, and relays.

Technical support: 24x7 remote engineering support, onsite commissioning and training, Annual Maintenance Contracts (AMCs), and recalibration services.

Optional integration & automation

SCADA-based control: HMI/PLC/SCADA remote control and monitoring, alarm/event logging, data trending, audit trails, and barcode/RFID integration for traceability.

Automated test sequences: Pre-programmed altitude/pressure profiles, fatigue and cyclic test programming, and multi-point test modes.

DAQ & connectivity: USB/Ethernet/cloud data export, compatibility with Industrial IoT systems, and SQL/CSV data logging.

Advantages over conventional systems

• Altitude simulation accuracy: True in-flight condition replication.
• Dual-chamber flexibility: Tests inter-compartment pressure control components.
• True mass flow measurement: Real-time data unaffected by pressure/temperature variations.
• Enhanced safety: Both mechanical and electronic fail-safes.
• Modular & customizable: Easily scalable for production or R&D environments.

Typical components tested

• Cabin pressure regulators
• Environmental Control System (ECS) valves
• Safety relief valves (SRVs)
• Altitude hold valves
• Interconnecting line valves (ILVs)
• Bleed air modulators
• Fuel tank inerting valves
• Emergency venting systems

Ordering & customization

Each unit is built to spec, based on your testing envelope and application. Available customization options include larger or smaller chambers, extended flow ranges, compatibility with helium, nitrogen, or other gases, environmental conditioning add-ons (humidity, temperature), and integration with client-specific software or automation systems.

Also known as

Depending on the application, this class of equipment is referred to across the industry as a Pneumatic Testing Bench, Air Pressure Test Rig, Compressed Air Test Stand, High-Pressure Pneumatic Testing Station, Industrial Pneumatic Test Platform, Leak Testing Pneumatic Bench, Pneumatic Valve Test Rig, Cylinder Function Test Unit, Actuator Pressure Test Rig, or Portable Pneumatic Test System. Related capability is also described as a Pneumatic Control System Test Bench, Calibration Test Rig for Pneumatics, Air-Operated System Test Stand, Multi-Port Pneumatic Tester, Endurance Test Bench for Pneumatics, Custom Pneumatic Test Platform, Automated Pneumatic Test Station, Pressure Decay Test Rig, Pneumatic Line Leak Detector, Air Flow Measurement Bench, Pneumatic Load Testing System, Dynamic Pneumatic Test Module, Modular Pneumatic Testing Station, PLC Controlled Pneumatic Rig, or High Flow Air Testing Bench. Neometrix's Pneumatic Test Rig (Vacuum) — also known as a Vacuum Test Rig or Altitude Test Rig — covers this range of pneumatic and vacuum test requirements in a single altitude-simulation platform, engineered and manufactured in India for aerospace, defence, and industrial customers worldwide.

Conclusion

The Pneumatic Test Rig (Vacuum) provides accurate, repeatable, and reliable testing for industrial and aerospace pneumatic systems. Its dual-chamber design, precision vacuum generation, adjustable flow control, and optional SCADA automation make it an indispensable asset for manufacturers, testing labs, and MROs validating aerospace valves and components before they reach service.