Filter Flow Resistance Tester

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Whats/App: +86 185 0176 3615

Web: qinsun-lab.com

The Filter Flow Resistance Tester operates by circulating a test fluid (such as hydraulic oil, lubrication oil, fuel, water, or air, depending on the filter's intended application) through the filter element or complete filter assembly under test. A variable speed pump or flow control valve is used to establish and control a range of flow rates through the filter. Pressure sensors or transducers are strategically placed immediately upstream and downstream of the filter to measure the pressure on both sides. The difference between these two pressure readings is the pressure drop across the filter at that specific flow rate. The tester systematically measures the pressure drop at multiple flow rates across the filter's operating range.

Applications

Determining the clean filter pressure drop versus flow rate characteristics of filter elements and assemblies.

Comparing the flow resistance of different filter designs, media, and manufacturers.

Selecting filters based on acceptable pressure drop limits for a given system flow rate.

Validating filter specifications provided by manufacturers.

Optimizing hydraulic or lubrication system design to minimize energy losses due to filtration.

Quality control during filter production to ensure consistent flow characteristics.

Research and development of new filter media and designs with lower flow resistance.

Standards

ISO 3968:2009：Hydraulic fluid power — Filters — Determination of pressure drop versus flow rate characteristics

SAE J806:2019：Filter Elements, Hydraulic, for Mobile Equipment

Features

Based on typical Filter Flow Resistance Testers:

Test fluid reservoir.

Variable flow rate pump or flow control system capable of generating and maintaining stable flow rates through the filter over a specified range.

Filter housing or fixture designed to securely hold the filter element or complete filter assembly under test, with connections for upstream and downstream pressure measurement.

Pressure transducers or sensors located upstream and downstream of the filter to measure pressures.

Differential pressure transducer (often included) to directly measure the pressure drop across the filter.

Flow meter to accurately measure the test fluid flow rate.

Temperature control system for the test fluid to ensure testing is performed at a consistent and relevant temperature, as viscosity affects pressure drop.

Technical Parameters

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