In the reliability testing of non-hermetic solid-state devices, speed and saturation are key. Our newly developed Unbiased Autoclave Test System is engineered specifically to meet the stringent requirements of JEDEC JESD22-A102. Unlike standard HAST chambers that control humidity at unsaturated levels (e.g., 85%), This system operates purely in Saturated Steam Mode (100% RH). By creating a high-pressure condensing environment, It forces moisture into the interfaces of PCBs, IC encapsulation, and polymer materials at an accelerated rate, Exposing delamination and moisture absorption defects in a fraction of the time required by traditional 85/85 testing.

The high pressure steam aging system is the industry standard for verifying the sealing performance and environmental durability of critical components. Our Unbiased Autoclave is engineered with a flexible pressure management system to meet diverse testing protocols, from standard JEDEC requirements to high-pressure custom stress tests. ① Relative Pressure Range: Standard configuration operates at +0 ~ 2.00 kg/cm² (Gauge Pressure). For enhanced stress testing, the system can be customized to achieve a maximum pressure of +0 ~ 3.00 kg/cm². Absolute Pressure Range: 1.0 kg/cm² ~ 3.0 kg/cm². ② Safety Design Capacity: The pressure vessel is engineered with a high safety margin, rated for a capacity of 4.0 kg/cm² (1 atm ambient + 3 kg/cm² internal pressure), ensuring absolute safety during long-duration operation.

Equipment Model	JESD22-A102-PCT-25	JESD22-A102-PCT-30	JESD22-A102-PCT-45	JESD22-A102-PCT-65
External Dimensions(W*D*H)	500mm*780mm*1250mm	725mm*950mm*1350mm	800mm*950mm*1350mm	950mm*900mm*1550mm
Internal Dimensions(W*D*H)	φ250mm*300mm	φ350mm*500mm	φ450mm*500mm	φ650mm*600mm
Humidity Range	100% R.H. (Saturated Vapor)	100% R.H. (Saturated Vapor)	100% R.H. (Saturated Vapor)	100% R.H. (Saturated Vapor)
Temperature Range	+100°C ~ +132°C	+ 100 ℃ ~ + 147 ℃	+100°C ~ +135°C	+ 100 ℃ ~ + 147 ℃
Pressure Range (Gauge)	0.00 ~ 2.00 kg/cm² (0 ~ 0.2 MPa)	0.00 ~ 2.89 kg/cm² (0 ~ 0.2 MPa)	0.00 ~ 2.00 kg/cm² (0 ~ 0.2 MPa)	0.00 ~ 2.50 kg/cm² (0 ~ 0.2 MPa)
Pressure Vessel Material	SUS#316 Stainless Steel	SUS#316 Stainless Steel	SUS#316 Stainless Steel	SUS#316 Stainless Steel
Temperature Fluctuation	± 0.5℃	± 0.5℃	± 1.0℃	± 1.0℃
Heat-Up Time	RT to +132°C approx. 10 min	RT to +132°C approx. 15 min	RT to +132°C approx. 10 min	RT to +132°C approx. 15 min
Temperature Uniformity	± 1.0℃	± 1.0℃	± 1.5℃	± 1.5℃
Pressurization Time	0.00 ~ 2.00 kg/cm² approx. 45 min	0.00 ~ 2.00 kg/cm² approx. 45 min	0.00 ~ 2.00 kg/cm² approx. 28 min	0.00 ~ 2.00 kg/cm² approx. 30 min
Safety Protection	Over-heat, Over-pressure,	Low water level, Door Interlock	Over-heat, Over-pressure,	Low water level, Door Interlock

This high pressure accelerated aging chamber is the preferred solution for industries requiring rigorous moisture ingress validation. The inner of high pressure steam aging system from Wewon Environmental Chambers Co., Ltd. is constructed from  3mm thick SUS#316 Stainless Steel .	1. SUS316 Stainless Steel Pressure Vessel
Why it matters:  While competitors use SUS304, our upgrade to SUS316 offers superior resistance to chloride corrosion and pitting, ensuring a longer lifespan even when testing aggressive flux residues on PCBs.
We have solved the common issue of gasket leakage. Our circular door features a unique  “Back-Pressure” Packing Design .	2. “Back-Pressure” Sealing Technology
Mechanism:  As internal chamber pressure increases, the packing is pushed tighter against the seal. This dynamic sealing method extends the service life of the silicone gasket significantly compared to traditional extrusion seals.
The system utilizes a specialized  Fluid Diffusion Heater  and natural convection circulation. This ensures the test zone remains at a strictly controlled  100% RH Saturated Vapor  state throughout the cycle, eliminating dry spots or temperature deviations (Uniformity: ).	3. Intelligent Saturated Steam Generation
Equipped with a built-in water storage tank and sensor. The system automatically detects low water levels and replenishes the boiler without interrupting the test cycle, enabling unattended operation for up to  999 hours .	4. The Automatic Water Replenishment

●	Q: What is the difference between this machine and a HAST chamber?
●	A: This system is an Unbiased Autoclave designed for 100% RH (Saturation). It creates condensation on the sample. A HAST chamber typically runs at 85% RH (Unsaturated) and is often used with electrical bias. If you need  JEDEC JESD22-A102 , this is the correct machine. A HAST chamber typically operates at 85% RH (Unsaturated) and allows for electrical biasing (JEDEC JESD22-A110)
●	Q: Why do you use SUS316 instead of SUS304 ?
●	A: High-pressure steam testing is corrosive. SUS316 contains molybdenum, which significantly enhances corrosion resistance against chlorides and acids often found in PCB manufacturing residues, ensuring the chamber lasts longer than standard models.
●	Q: Why use High Pressure Steam for testing work?
●	A: High pressure increases the boiling point of water, allowing for moisture testing at temperatures above 100°C (typically 121°C). This creates a “super-accelerated” effect, forcing moisture into micro-cracks and interfaces much faster than a standard 85°C/85% RH test.
●	Q: Does this machine support automatic water filling?
●	A: Yes. The high pressure steam aging system features a built-in reservoir and level sensors to automatically manage water supply, ensuring continuous operation for long-duration reliability tests (e.g., 96 hours or more).