In the rigorous world of aviation and space exploration, component failure is not an option. Whether it is a commercial airliner cruising at 35,000 feet or a satellite orbiting in the vacuum of space, equipment must withstand extreme variations in pressure and temperature. At Wewon Environmental Chambers Co., Ltd., we specialize in the engineering of high-performance testing equipment designed to validate these critical technologies. Today, we are looking at the technical capabilities of our aerospace altitude test chamber, a system engineered to replicate the harsh environments found in the stratosphere and deep space.
The aerospace altitude test chamber is a vital tool for new product development, prototype trials, and final qualification. By combining deep vacuum capabilities with extreme thermal cycling, Wewon Environmental Chambers Co., Ltd. provides the assurance that your product will perform – whether it is 10 kilometers in the sky or orbiting in the vacuum of space. For more information on customizing a thermal vacuum chamber for your specific testing profile, Please contact our engineering support team.
| Technical Parameters | WEW-AAT-150L-1 | WEW-ATC-0225L-As15 | WEW-AACT-408L-sK2 | WEW-AKTA-1000L-MIL |
| est Room Volume | 150 Liters | 225 Liters | 408 Liters | 1000 Liters |
| Internal Dimensions | W500*H600*H500mm | W500*H750*H600mm | W600*H850*H800mm | W1000*H1000*H1000mm |
| External Dimensions | W1000*H1750*H1200mm | W1000*H1850*H1350mm | W1150*H1950*H1530mm | W1350*H2150*H1850mm |
| Equipment Weight | 625 KG | 755 KG | 985 KG | 1250 KG |
| Sample Load Capacity | 2 Layers (Fixed Structure), | Designed for 25KG Load per shelf. | M4/M6 mounting holes included. | Designed for 50KG Load per shelf. |
| Temperature Range | -40℃ (-60℃)~ +150℃ | -20℃(-40℃) ~ +160℃ | -80℃ ~ +120℃(+180℃) | -70℃ (-40℃)~ +150℃, +180℃ |
| Standard: Supports Avionics Environmental Testing Profiles. | ||||
| Extended Option: Cryogenic down to -100℃, -80℃, , or High Heat up to +1200℃, +900℃, +650℃ | ||||
| Temperature Stability | ≤ 0.5℃ Measured at Geometric Center Under Stable Conditions) for WEW-AAT-150L-1 & WEW-ATC-0225L-As15 | |||
| ≤ 1.0℃ Measured at Geometric Center Under Stable Conditions) for WEW-AACT-408L-sK2 & WEW-AKTA-1000L-MIL | ||||
| Temperature Uniformity | ≤ 3℃ (Varies Dynamically with Pressure/Vacuum Level) | ≤ 5℃ (Varies Dynamically with Pressure/Vacuum Level) | ||
| Heating Rate Speed | 2.5℃/min | 3.5℃/min | 3.5℃/min | 5.0℃/min |
| Rapid Heating Options: 5℃/min, 10℃/min, 30℃/min (linear/non-linear). | ||||
| Cooling Rate Speed | 1.0℃/min | 1.5℃/min | 2.5℃/min | 2.0℃/min |
| Liquid nitrogen (LN2) pressurization option: up to 20°C/minute during pressure testing. | ||||
| Using a Tecumseh compressor + semi-hermetic compressor solution can achieve rapid cooling rates of 3℃/min, 5℃/min, and 10℃/min (linear or non-linear). | ||||
| Humidity Range (%) | RH 20% ~ 98% | RH 10% ~ 90% | RH 5% ~ 50% | RH 20% ~ 95% |
| Control Precision | ± 2.0%RH | ± 2.5%RH | ± 5.0%RH | ± 5.0%RH |
| Pressure Range | 0.0001 Pa (1*10-4Pa) | 1*10-5Pa, 1*10-7mbar | 0.0001 Pa (1*10-4Pa) | 1*10-5Pa, 1*10-7mbar |
| 101 kPa to 1 kPa (Simulation of Altitude up to 30km) | ||||
| Ultimate Vacuum (Limit): 1.8 x 10^-4 Pa (Simulation of Space Environment >150km) | ||||
| Low Pressure 10KPA ~ Atmospheric Pressure 133.32 Pa (1.0 Torr) | ||||
| Atmospheric Pressure 133.32 Pa ~ 1 kPa | ||||
| Pull-down Time | The target low pressure will be reached within 2-10 minutes (depending on the set value). | |||
| Vacuum System Logic | Dual-Stage Configuration: | Dual-Stage Configuration: | Dual-Stage Configuration: | Dual-Stage Configuration: |
| 1. Primary Pump: High-efficiency Scroll Dry Pump for initial pull-down. | 2. Secondary Pump: Turbo Molecular Pump for deep vacuum (10 -4Pa) stability.} | |||
| Refrigeration System | Tecumseh Hermetic Compressor Unit (Imported from France). | Uses Cold Balance Technology for Precise Thermal Control. | ||
| Controller Architecture | 7-inch True Color Touchscreen PLC. | 7-inch True Color Touchscreen PLC. | 10-inch True Color Touchscreen PLC. | 10-inch True Color Touchscreen PLC. |
| Resolution: Temp 0.1℃ / Pressure High Precision Floating Point. | Supports 1000 Program Segments for Complex RTCA DO-160 Cycling. | |||
| Connectivity & Ports | Standard configuration: 1 KF25 vacuum test port (quantity/size customizable) | Interfaces: USB, RS-485/RS-232, Ethernet (for remote monitoring) | ||
| Safety Mechanisms | Rapid Decompression Valves, Overheat Protection, Phase Sequence Protection. | Explosion-proof Door Latch, Oil Pressure Monitoring. | ||
| Modern avionics and aerospace materials face a dual threat: rapid temperature changes and drastic pressure drops. As altitude increases, air density decreases, reducing the cooling efficiency of electronics and increasing the risk of material outgassing or structural deformation. | 1 The Critical Need for High Altitude Low Pressure (HALP) Test | |
| To ensure reliability, engineers utilize our aerospace altitude test chamber from Wewon Environmental Chambers Co., Ltd. simulating conditions up to 150km (10^-4 Pa). Precise temperature control (-70°C to +150°C) for aerospace components, avionics, and satellite parts. Fully compliant with RTCA DO-160, MIL-STD-810 Section 500.6 Low Pressure, IEC 60068-2-13, IEC 60068-2-40, IEC 60068-2-41. | ||
| This equipment is not merely a vacuum oven; it is a combined altitude & temperature chamber capable of running complex, synchronized environmental profiles. | ||
| As quality inspection engineers, we prioritize structural integrity. The Wewon aerospace altitude test chamber utilizes a robust, integrated structural design as below mentioned. This design allows for a thermal vacuum chamber (TVAC) capability, essential for testing heat dissipation in environments where convection cooling does not exist. | 2 Technical Architecture and the Design | |
| The main test volume is a heavily insulated, reinforced vessel designed to withstand high external pressure forces when the interior is under deep vacuum. | 2.1 Pressure-Bearing Chamber (Front): | |
| This section houses the cascade refrigeration system and the high-performance vacuum unit. | 2.2 Mechanical Unit (Rear): | |
| The electrical controller is ergonomically integrated into the chamber door, featuring a PLC touchscreen interface for immediate data visualization. | 2.3 Control System (Door-Mounted): | |
| The core advantage of Wewon’s technology lies in its intelligent control logic. The system operation follows a precise sequence: | 3 Working Principle: Achieving Deep Vacuum and Thermal Precision | |
| The user pre-sets the target vacuum level and temperature values via the touchscreen interface. This allows for custom “step-wise” slow heating or cooling ramp times. | PLC Programming: | |
| Upon initiation, the control system commands the solenoid valves to open. The primary vacuum pump engages first. Once a specific threshold is reached, the secondary vacuum pump automatically activates to pull the chamber down to high-vacuum levels (up to $1.8* 10^{-4}$ Pa). | Vacuum Staging: | |
| When the target pressure is achieved, the vacuum system stabilizes. The chamber then maintains the set temperature (cryogenic or elevated) while holding the vacuum. | Stabilization Features: | |
| The chamber is equipped with feedthroughs, allowing engineers to power on the device under test (DUT) to measure electrical performance parameters in real-time. | Live Electrical Testing: | |
| Safety is paramount during the rapid decompression test or standard venting. Our system offers two methods to return to ambient pressure: | 4 Controlled Pressurization and Venting | |
| The PLC unit for Wewon’s altitude simulation test chamber automatically manages the pressure return rate. | 4.1 Programmed Return: | |
| A pre-installed manual needle valve allows for a slow, controlled “breaking” of the vacuum, preventing physical shock to sensitive instruments. | 4.2 Manual Intervention: | |
| For suppliers to Boeing and Airbus, adherence to standards is mandatory. Our equipment is specifically designed to meet the rigorous requirements of the industry. | 5 Compliance with Global Aerospace Standards | |
| The Aerospace altitude test chamber from Wewon Environmental Chambers Co., Ltd. compliant with MIL-STD-810 Section 500.6 (Low Pressure) ensures that military equipment can survive rapid ascent, emergency descent, and high-altitude transport. This standard is the benchmark for aerospace & avionics testing in defense sectors. | MIL-STD-810 Compliance | |
| We specifically target compliance with RTCA DO-160 Section 4, which governs temperature and altitude. As many in the industry know, RTCA DO-160 is the standard that Boeing and Airbus suppliers must observe. Section 4 specifically addresses the combined effects of temperature and altitude, ensuring that cabin electronics do not arc or overheat during flight. | RTCA DO-160 for Civil Aviation | |
| At the heart of the combined altitude & temperature chamber is a sophisticated, imported controller designed for stability and data traceability. | 1. Advanced Control System (PLC & HMI) | |
| 7-inch True Color LCD Touchscreen (Resolution: 800 * 480, 65535 colors). | Interface: | |
| Uses a PLC architecture with multi-group intelligent PID control to manage Temperature and Pressure simultaneously. | Intelligent Logic: | |
| * Real-time display of Set Values (SV) and Process Values (PV). | Data Management: | |
| * USB interface for exporting historical data curves. | ||
| * PC connectivity for remote monitoring, data acquisition, and multi-machine synchronization. | ||
| Supports up to 1000 executable program segments (patterns), allowing for complex cycling required by avionics environmental testing. | Programming: | |
| Displays program lines, remaining time, cycle counts, and operational curves. | Visualization: | |
| To function as a high-performance thermal vacuum chamber (TVAC), Wewon utilizes top-tier global components to ensure rapid pull-down rates and thermal stability. | 2. Vacuum and Thermal Performance | |
| Equipped with French Tecumseh hermetic compressors. These imported units are selected for their high energy efficiency, low noise, and reliability during long-duration tests. | Refrigeration System: | |
| Uses USA Honeywell Genertron 407C, a non-ozone-depleting, environmentally safe refrigerant. | Eco-Friendly Refrigerant: | |
| Wewon’s unique cold Balance” technique reduces energy consumption while maintaining precise thermal stability, essential for stratosphere simulation. | Cold Balance Technology: | |
| The viewing window utilizes a double-layer vacuum tempered glass with an internal conductive film for heating, ensuring a clear view of the test subject by preventing frost buildup during low-temperature phases. | Heating & Defrosting: | |
| The aerospace altitude test chamber from Wewon Environmental Chambers Co., Ltd. is built with a focus on durability, hygiene, and thermal isolation. | 3. Construction and Structural Engineering | |
| High-grade SUS304 Stainless Steel (1.0mm thickness). The surface is smooth, corrosion-resistant, and easy to clean, featuring double-line silicone sealing strips to ensure vacuum integrity. | Interior Material: | |
| 1.2mm Cold-Rolled Steel with a baking paint finish (Dark Gray body / Deep Blue door). The sheet metal is processed via CNC machine tools for a modern, aesthetic appearance. | Exterior Material: | |
| A combination of rigid PU foam and ultra-fine fiberglass ensures minimal thermal loss, critical for conducting a high altitude low pressure (HALP) test. | Insulation: | |
| Features a OD 50mm, 80mm test hole on the left side, equipped with a rubber isolation plug and a stainless steel vacuum cover for cable routing. | Customization (Non-standard): | |
| Safety is paramount when performing a rapid decompression test or long-term thermal cycling. The system includes a comprehensive multi-protection matrix: | 4. Machine’s Safety and Protection Systems | |
| The circuit system, water system, and refrigeration system are physically separated (zoned layout) to prevent interference and enhance safety. The copper pipes feature anti-corrosion clear coating to prevent oxidation. | Electrical Safety: | |
| ① Compressor overload and overheat protection. ② Phase loss and compressor delay protection. | Active Monitoring: | |
| ③ Fan overload protection. ④ Over-pressure oil protection. | ||
| Equipped with a non-reaction, explosion-proof door handle for safe operation under pressure differentials. | Emergency Features: | |
The aerospace altitude test chamber from Wewon Environmental Chambers Co., Ltd. is a premier solution designed for aerospace & avionics testing. This system goes beyond standard environmental testing by functioning as a high-precision thermal vacuum chamber (TVAC), capable of replicating the harsh conditions of the stratosphere and deep space.
Engineers utilize this climatic vacuum chamber to validate critical flight hardware. It simulates high altitude environments up to 150km (10^-4 Pa), ensuring compliance with rigorous international standards. Whether performing a rapid decompression test or long-duration stratosphere simulation, this equipment offers the precise temperature & vacuum control required for aerospace component testing.
🚑 Expanded Compliance: Medical Device & Air Ambulance Testing
Beyond traditional aerospace components, the Wewon’s Aerospace Altitude Test Chamber is a critical validation tool for the medical device industry. Our system is fully capable of executing the rigorous environmental stress tests required by the IEC 60601 series standards.
- IEC 60601-1-11 (Home Healthcare): Validates reliability during Air Transport and Storage. Our system simulates depressurized cargo hold conditions (700 hPa to 1060 hPa), ensuring devices remain safe after global air freight shipping.
- IEC 60601-1-12 (Emergency Medical Services – EMS): Essential for Air Ambulance equipment. Devices used in helicopters must operate reliably at altitudes up to 4,000m (approx. 620 hPa). Wewon’s chamber verifies that life-saving equipment performs flawlessly during airborne rescue missions.
Connects the test sample inside to external instruments. Critical for monitoring optical communication interruption or attenuation under extreme conditions.
Rapidly evacuates air to create a precise low-pressure state, accurately simulating high-altitude aerospace environments down to specific kPa levels.
Coordinates refrigeration units and solenoid valves to precisely control internal temperature, simulating the freezing conditions found at high altitudes.
Features individualized locking nuts for absolute sealing, allowing optical fibers to penetrate chamber walls without leaking pressure or vacuum.
Engineering the Extraordinary: Large-Scale & Non-Standard Customization
At Wewon Tech, We understand that aerospace and defense testing often requires specifications beyond standard catalog models. Our factory specializes in the design and manufacturing of Non-Standard Environmental Test Equipment tailored to extreme performance requirements.
1. High-Performance Refrigeration System for Rapid Stress Screening
The images shown below display the heavy-duty compressor skid designed for a large-scale walk-in chamber. This custom-engineered refrigeration unit is the “heart” of our high-performance systems, capable of driving:
- Rapid Temperature Change Rates: Achieving non-linear ramp rates of up to 20°C/min for ESS (Environmental Stress Screening).
- Combined Testing: Powering AGREE Chambers (Temperature/Humidity/Vibration) for mission-critical avionics testing.
2. Case Study: 33m³ Walk-In Altitude Chamber (20,000m Simulation)
We recently successfully delivered a massive 33m³ Walk-In Altitude Test Chamber. This project required a sophisticated vacuum and refrigeration system capable of simulating high-altitude conditions of 20,000 meters (approx. 65,000 ft) while maintaining strict temperature control.
The robust mechanical structure shown in these photos ensures that even under such extreme low-pressure and low-temperature conditions, the system operates with stability and longevity. Whether you need a High Altitude Low Pressure Chamber or a customized Three-Comprehensive Test System, our engineering team is ready to build it.
Heavy-Duty Refrigeration Unit for Large Scale Chambers
Custom Manufacturing of Non-Standard Environmental Systems
