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Pressure Cracking Leak Test

What is a Pressure Cracking Leak Test?

A crack test is used to find the opening pressure of a check valve or similar item. The crack test is similar to the burst test, in that it detects an event such as a valve opening. It is especially useful in testing devices that have a small amount of weep (small leak) before the full opening. 

The test is performed across two ports, with the inlet of the device on port one (sensor 1) and the outlet of the device is connected to port two (sensor 2). The pass/fail limit is set as a min/max pressure value of the pressure required to open the device. 

The ‘trigger’ is the amount of pressure increase on the output side that constitutes an opening of the device. Sensor two can be either a pressure transducer or a mass flow transducer depending on the needs of the application.

Sample Applications

  • Check Valve
  • Needless Injection Site
Graph illustrating pressure performance after the regulator during a pressure cracking leak test to verify system accuracy and reliability.
Pressure over time graph with input and output sensor data showing crack trigger, crack minimum, and crack maximum values in a pressure cracking leak test.
Diagram showing airflow through pipes during a pressure cracking leak test to detect seal failures and ensure product integrity in manufacturing.
Click image to enlarge

Why Choose Pressure Cracking Leak Testing?

Pressure cracking leak testing is an essential method for detecting structural weaknesses in pressurized components. By applying controlled pressure until a failure point is reached, manufacturers gain valuable insights into product durability, safety, and compliance. Zaxis provides advanced, automated solutions that ensure every test is accurate, efficient, and repeatable.

  • Identifies weak points in pressurized systems before failures occur
  • Ensures compliance with safety and industry regulations
  • Accurate, automated testing with repeatable results
  • Supports electronics, medical devices, and automotive manufacturing
  • Customizable setups to match your production requirements

Ready to strengthen your quality assurance process?

Contact Zaxis today to learn how our pressure cracking leak testing solutions can safeguard your production and deliver reliable results.

Suggested Leak Testers For Burst Pressure

The modular design makes this mulit-tester the work horse of the leak tester family.

Large feature capacity including a large, easy to use, color touchscreen.

Pressure cracking leak testing is a critical method for manufacturers who need to verify product strength, durability, and safety under pressure. At Zaxis, our automated pressure cracking leak testers provide precise, repeatable results for industries including medical devices, electronics, and automotive components. By identifying weaknesses before products reach market, we help manufacturers maintain compliance, reduce costly failures, and ensure long-term reliability.

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