Bubble Point Test Procedure for Sintered Metal Filter Cartridges
A controlled, product-specific wet test for verifying the bubble-point performance of fully wetted sintered metal filter cartridges.
1. Prepare the cartridge and apparatus
Use a clean cartridge and confirm the agreed test liquid, test gas, fixture, test direction and acceptance limit. Fully wet the filter medium and ensure that no air remains trapped in the pore structure before testing.
2. Mount, pressurize and observe
Seal the wetted cartridge at its end fittings in the test fixture. Apply gas from the specified upstream side and raise pressure at the agreed controlled rate. Observe the downstream surface under liquid. The bubble point is the pressure at which a continuous stream of bubbles first emerges from the filter medium.
3. Record and determine the result
Record the cartridge or batch ID, material, filter grade, dimensions, test liquid, gas, temperature, test direction, pressure-rise rate, bubble-point pressure and observation. Accept or reject only against the validated limit in the applicable product specification. When the method and limit are validated for the cartridge, this test can support integrity verification.
Need a filter cartridge Bubble Point test?
Send the filter medium, micron rating, dimensions, end fittings and acceptance requirement. FILTURE will confirm the appropriate test setup and reporting method.