❓ FAQ & Troubleshooting
Find quick answers to common questions about our compressed air products, their use, maintenance and replacement.
Are Hankison Alumina and DelSORB® HQ-A4 the same?
No, not exactly. Both are activated alumina desiccants used in adsorption dryers, but DelSORB® HQ-A4 is a specifically defined 4 mm premium grade, while Hankison Alumina is the general standard grade and is specified as 1/8″ (approx. 3.2 mm) in older documentation. When replacing the desiccant, you should therefore choose the type specified for your dryer.
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Is an alternative filter element as good as an original filter element?
An alternative filter element can perform just as well as an original filter element if it is correctly selected and meets the requirements for the filter housing, filtration grade, airflow, pressure drop and compressed air quality. The most important factor is therefore not whether the filter is original or alternative, but whether it provides the required filtration performance, reliability and total cost of ownership.
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When should a compressed air filter be replaced?
A compressed air filter should be replaced when it can no longer maintain the required level of filtration or begins to affect system performance. This may be indicated by excessive pressure drop, reduced airflow, visible damage or an active filter alarm. Always follow the manufacturer’s recommended replacement interval and, at the same time, assess the actual condition of the filter.
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How do I choose the right compressed air filter element?
The correct compressed air filter element should be selected based on filter type, airflow, operating pressure, temperature, filtration grade and compressed air quality requirements. You should also check that the element’s dimensions and connection are compatible with the filter housing.
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How do I replace a compressed air filter element?
To replace a compressed air filter element, first shut down and depressurize the system. Remove the old filter element, clean the filter housing and check the new element for the correct type, size and any signs of damage. Install the filter element and seals correctly, close the filter housing and start the system slowly. Finally, check for leaks and verify proper operation.
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How do I choose the right compressed air filter?
This depends on your compressed air system and the required air quality. Select the filter based on factors including ISO 8573-1 requirements, airflow, operating pressure, temperature and the type of contamination that needs to be removed.
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Which micron rating and filter grade should I choose for compressed air?
The micron rating indicates the size of particles the filter is designed to remove, while the filter grade describes its filtration stage and intended application. The right choice depends on the required compressed air quality, filtration efficiency and airflow.
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What is the difference between a refrigerated dryer and an adsorption dryer?
A refrigerated dryer removes moisture by cooling the compressed air, causing water vapour to condense. An adsorption dryer uses a desiccant to remove moisture and can therefore achieve a significantly lower pressure dew point.
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