I. Introduction of Vacuum Decay Leak Test Equipment

1. Brief Introduction to the Vacuum Decay Leak Test Method

The vacuum decay leak test method is a non-destructive technique used to detect leaks in sealed packages. This method involves creating a vacuum in a test chamber and monitoring the change in pressure over time. Any increase in pressure indicates the presence of a leak. This technique is highly valued in various industries due to its accuracy, reliability, and efficiency in ensuring product integrity.

2. Applications

  • Packaging: Ensuring that packages are leak-free to maintain product quality and safety.
  • Medical Device Materials and Packaging: Verifying the sterility and integrity of medical devices and their packaging.
  • Pharmaceutical Testing: Ensuring that pharmaceutical products are free from contamination and maintain their efficacy.
  • Food and Beverages: Preventing spoilage and maintaining the freshness of food and beverages.
  • Adhesives: Ensuring the effectiveness and reliability of adhesive products.
  • Electronics: Detecting leaks in electronic components to prevent damage and ensure functionality.
  • Quality Inspection Agencies: Providing reliable and accurate leak detection for various products to ensure compliance with industry standards.

3. Features and Advantages

  • Non-destructive Testing Method: Allows for the preservation of the tested samples, making it ideal for high-value products.
  • Operated via a PLC System and an HMI Human-Machine Interface: Ensures ease of use and efficient operation.
  • Tailored Chamber Sizes: Offers customization to meet specific testing requirements.
  • High Sensitivity for Detecting Minute Leaks: Capable of identifying even the smallest leaks, ensuring high precision.
  • Effective Leak Rate Calculation: Provides accurate measurements of leak rates.
  • Straightforward and Highly Efficient Method: Simplifies the testing process with primary steps including filling, settling, and testing.
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II. Technical Specifications

Test Range1Pa
Sensitivity1~3μm
Chamber sizeMade-On-Demand
Vacuum pumpto be prepared by user
Power SupplyAC 110~220V 50Hz

III. Test Methods

1. Principle of Vacuum Decay Testing

The vacuum decay test method operates on the principle of pressure change detection. When a vacuum is applied to a sealed test chamber, any leaks in the tested package will cause a change in the pressure inside the chamber. By monitoring this pressure change over time, the presence and size of leaks can be determined.

2. Step-by-Step Testing Procedure

  • Preparation of the Sample: The sample is placed inside the test chamber.
  • Calibration of the Instrument: The equipment is calibrated to ensure accurate measurements.
  • Performing the Vacuum Decay Test: A vacuum is applied to the chamber, and the pressure is monitored.
  • Analyzing and Interpreting the Results: The pressure change data is analyzed to determine the presence and size of leaks.
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IV. Compliance with ASTM F2338

1. Overview of ASTM F2338 Standard

ASTM F2338 is the standard test method for non-destructive detection of leaks in packages by vacuum decay method. This standard provides guidelines for conducting the test, ensuring accuracy and reliability in leak detection.

2. Key Requirements and Specifications

  • Test Equipment Calibration: Ensuring that the vacuum decay equipment is accurately calibrated.
  • Test Procedures: Detailed steps for performing the vacuum decay test.
  • Data Analysis: Guidelines for interpreting the results and determining leak rates.

V. Applications and Case Studies

Industry-specific Applications

  • Packaging: Ensuring the integrity of product packaging to prevent contamination and spoilage.
  • Medical Devices: Verifying the sterility and safety of medical devices, ensuring they are free from leaks that could compromise their functionality.
  • Pharmaceuticals: Maintaining product quality and safety by detecting leaks that could lead to contamination or loss of potency.

VI. FAQs

A1: Vacuum decay leak testing is a non-destructive method that detects leaks by measuring pressure changes in a vacuum chamber containing the test item.

A2: It offers high sensitivity and accuracy, is non-destructive, and can detect very small leaks, making it more effective than some other methods.

A3: Various packaging types including flexible, rigid, and semi-rigid containers, as well as blister packs and pouches, can be tested.

A4: The equipment can detect leaks as small as 1-3 μm, making it highly sensitive and reliable for various applications.

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