Distilled Spirits

Graver Technologies distilled spirits filtration products protect spirits from contaminant and quality issues.

Innovative Technologies for Distilled Spirits

Filtration of distilled spirits can be different than that of other alcoholic beverages due to high alcohol levels which prevent the presence of microbes. Consumers are more concerned with visual and aromatic aspects- expecting a clear and bright product. Manufacturers need to deliver a bottled product free of suspended particles and without the risk of chill haze formation. Contaminant risks can vary greatly, ranging from carbon from the aging (char) or mellowing process to colloidal materials from fruit-based additions, to haze formation that can occur post-processing. Filtration processes are designed to ensure the best flavor, color, and clarity are achieved in the final product.

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About Graver's Products For Distilled Spirits

Barrel Char removal in the production of whisky and other brown spirits after barrel aging
Activated Carbon removal in clear spirits as well as in the mellowing of whiskey
Bottling Filtration, the final step to ensure product clarity
General Particle control to remove sugar crystals from rum or particles from flavor infused spirits
Removal of agglomerates commonly found in brown spirits that create Chill Haze

Product Selection

CMBF™, PMC™, STC™ - 1 to 10 micron polypropylene filters provide particle control for clarity in bottling
GFC™ - for chill haze removal
WaterTEC™ - 0.2 to 0.65 micron membrane as an economical membrane for incoming water used for bottle washing and dilution
QMC™, PMC™ - as char/carbon trap after aging or mellowing

Frequenty Asked Questions

How often should gas turbine filters be replaced?

This depends on the environment and filter type; however, pre-filters are changed every 3–6 months, while final filters may bechanged once in a year or two. Monitoring pressure drop is key to determiningreplacement timing.

What factors affect the operating life of a gas turbine filter?

Here are some factors:

Ambient dustand pollution levels
Operatinghours and load
Pulse-cleaningfrequency, depending on the type
Humidity andmoisture
Filter mediaand design

How do I know when a filter needs to be changed?

Differential pressure across the filter is animportant aspect in this case. If it increases beyond the set threshold, thefilter may be clogged or need cleaning or replacement.

What is pressure drop and why does it matter?

Pressure drop is the resistance to airflow through afilter. A high-pressure drop reduces turbine efficiency and increases energycosts. Selecting low-resistance filters helps improve performance.