Summary of Depth Versus Pleated Filters
| PARAMETER |
SURFACE FILTERS |
DEPTH FILTERS |
| Deformable Particles |
May blind off pleats |
Recommended - absorptive retention |
| Nondeformable Particles |
Removes narrow range |
Removes broader range of particles |
| Rating |
Absolute or nominal |
Absolute or nominal |
| Classification/Clarification |
Classification |
Clarification |
| Flow per 10" Equivalent PSID |
Recommended 10 gpm |
Recommended 5 gpm |
| Economics - Particle Retention < 10 microns |
Holds more dirt than depth, handles higher flow rate |
More economical than pleated at greater than 10 microns |
| Cartridge Cost* |
More expensive initially than depth, fewer replacements, holds more dirt |
More economical initially than pleated, holds less dirt |
| Housing Cost* |
Fewer cartridges - smaller housing |
More cartridges - bigger housing |
* Based strictly on cartridge purchase, pleated cartridges cost more per 10" equivalent. If a new system is being designed, a larger housing will be necessary for depth cartridges, as opposed to pleated cartridges, to achieve the same flow at a give pressure drop and micron rating.
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