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Bubble Point Test (BPT) Unit

FILTER INTEGRITY TESTING SYSTEMS

Bubble Point Test (BPT) Units

Filter Integrity Testing Systems for Metallic Candle & Disc Filters

Purofiltec manufactures Bubble Point Test (BPT) Units for verifying the integrity and filtration performance of metallic Candle Filters and Disc Filters used in polymer melt filtration systems.

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Non-Destructive Testing
Candle & Disc Filters
Customized Test Fixtures
Bubble Point Test BPT Units for Metallic Candle and Disc Filters
Non-Destructive Filter Integrity Testing
Bubble Point Test Unit for Metallic Filters
Bubble Point Testing for Metallic Filter Integrity
PRODUCT OVERVIEW

Non-Destructive Filter Integrity Testing

Purofiltec manufactures Bubble Point Test (BPT) Units for verifying the integrity and filtration performance of metallic Candle Filters and Disc Filters used in polymer melt filtration systems.

The equipment performs a non-destructive integrity test by measuring the pressure at which the first continuous air bubbles pass through a wetted filter media, helping identify damaged media, oversized pores, or sealing defects.

The BPT Unit enables manufacturers to verify the quality of newly manufactured filters as well as cleaned filters before they are returned to production, ensuring reliable filtration performance and extended filter service life.

WORKING PRINCIPLE

Working Principle

The Bubble Point Test is based on the principle that a wetted porous filter retains liquid within its pores due to surface tension. As compressed air pressure is gradually increased, the pressure at which the first continuous stream of bubbles appears is recorded as the Bubble Point Pressure, confirming the integrity of the metallic filter media.

The test is completely non-destructive, allowing the filter to be safely reused after successful testing.

The test is completely non-destructive, allowing the disc filter to be safely reused after successful testing.

SUITABLE FOR TESTING

Applications

Metallic Candle Filters
Metallic Disc Filters
Hard Hub Disc Filters
Pleated Candle Filters
Sintered Fibre Filters
TEST PROCEDURE

Test Procedure

01

Install the filter in the test fixture.

02

Wet the filter media with the IPA test liquid.

03

Start the test cycle.

04

Air pressure is gradually increased under controlled conditions.

05

The system/operator detects the first continuous stream of bubbles.

06

Bubble point pressure is recorded and compared with the acceptance criteria.

07

The filter is accepted or rejected based on the test result.

AVAILABLE CONFIGURATIONS

Available Configurations

BPT Unit for Candle Filters

Designed for testing cylindrical metallic candle filters of various diameters and lengths using customized fixtures.

BPT Unit for Disc Filters

Designed for testing metallic disc filters, including hard hub disc filters, with customized fixtures for different disc diameters and constructions.

FAQ

Frequently Asked Questions

Technical answers to common questions about Bubble Point Test (BPT) Units.

A Bubble Point Test is a non-destructive integrity test used to verify the condition of a metallic filter by measuring the pressure at which the first continuous air bubbles pass through a wetted filter media.

The BPT Unit is designed for metallic candle filters and metallic disc filters, with customized fixtures available for different sizes and designs.

Yes. The system is ideal for verifying the integrity of cleaned filters before they are returned to production.

The filter media is wetted with IPA test liquid before the controlled air-pressure test is started.

The Bubble Point Pressure is the pressure at which the first continuous stream of air bubbles passes through the wetted filter media, helping verify filter integrity.

COMPLETE FILTER INTEGRITY TESTING SOLUTION

Complete Filter Integrity Testing Solution

Purofiltec's Bubble Point Test (BPT) Units provide accurate, repeatable, and non-destructive integrity testing for both metallic candle filters and metallic disc filters. Designed with customized fixtures, PLC-based automation, and digital pressure monitoring, the system helps ensure reliable filtration performance, extended filter life, and consistent product quality before filters are returned to production.

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