Sealing performance test

Test Background

Quick connectors are the components with the most frequent insertion and extraction operations and the highest leakage risk in the liquid-cooling system. Their sealing performance directly determines whether the system can be disconnected without leakage during maintenance, thus avoiding short-circuits caused by coolant splashing.

Test Introduction

The sealing performance test comprehensively evaluates the sealing ability of quick connectors in the connected and disconnected states through sealing tests, helium mass spectrometry leak detection, pressure drop tests, and flow loss tests.

Testing Objectives

Verify the internal and external leakage rates in the connected state

Ensure reliable sealing of the two-way check valve in the disconnected state

Determine the pressure drop and flow coefficient (Cv value)

Detect the fluid loss during a single insertion and extraction operation

Test Standards

GB/T 7939.2-2024 Test methods for quick-change connectors

ISO 18869-2017 Hydraulic fluid power-Connections-Test methods

Sealing performance requirements for OCP UQD

Applicable Products/Fields

Suitable for UQD quick connectors, blind-mate connectors, pressure hot-plug connectors, etc. in liquid cooling systems.

Test Content

Low-pressure leakage test: Maintain a pressure of 750 mm of water column for 30 minutes to measure leakage

High-pressure leakage test: Maintain the maximum working pressure for 30 minutes to measure leakage

Helium mass spectrometry leak detection: Detect leaks at the 10⁻⁶ level using the vacuum chamber method

Pressure drop test: Measure the pressure drop at different flow rates and calculate the Cv value

Fluid loss test: The fluid loss per single insertion and extraction is ≤ 0.025 mL

Project Advantages

High-precision helium leak detection equipment, capable of detecting micron-level leaks

Pressure drop testing covers both flow directions

Compliant with multiple standards including OCP/ISO/GB

Laboratory Configuration

Helium mass spectrometer leak detector (vacuum box method)

Pressure drop test system (flow rate: 0-20 L/min)

High-precision balance (fluid loss weighing method)

Automatic pressure/flow recording system

FAQ
Q: What does a UQD fluid loss of 0.025 mL mean?
A: It is equivalent to the volume of half a drop of water, ensuring minimal cumulative leakage even with frequent plugging and unplugging, so as not to cause water shortage or contamination in the system.