||Inadequate separation of pleated filter paper caused by poor quality control or damaged cartridge
||Inspect cartridge and replace as needed
|Overrated solvent pump
||A higher than recommended flow rate compressed lint and soil
||Use solvent pump recommended by manufacturer
|Partially open or unopened valve or restriction in lines down stream of filter
||Creates a higher than normal base pressure Keep valve open
||Clean lines as needed
|Broken lint basket, basket not in place, or gasket seal under basket broken or not in place
||Restriction of solvent flow occurs when an accumulation of lint is compressed on filter paper and in holes of outer shell
||Inspect and repair or replace as needed
|Accumulation of silt on bottom of base tank and/or cartridge canister
||Silt is composed of insoluble and partially soluble soils. Dispersed in the solvent, they can plug filter paper.
||Clean out base tank
|Excess water in solvent
||Moisture swells filter paper, decreasing its porosity. Check for source of water.
||See Excess Water
|Solvent temperature is too low or too high
||Cold temperatures slightly increase viscosity of matured solvent and decrease solubility of contaminants. High solvent temperatures increase.
||Maintain solvent temperature between 75° and 80°F
|Excessive use of some spotting agents
||Prespotters contribute to the total nonvolatile content in the solvent Glycerin, occasionally used as a lubricant, will shorten filter life.
||Prespot sparingly and only when necessary
|Excessively soiled garments
||Occurs mainly during winter months. A 25 - 30% reduction in cartridge life can be expected.
||Cartridge life is in part dependent on the volume of soil contacting the filter paper
|Overloading the unit with a large volume of deep piled fabrics, blankets, coat linings etc.
||Lint will act as a soil if allowed to accumulate and become compressed on filter elements
||The size of a wash load should be based on the number and type of garments, not merely on their combined weight
|Fabric containing a partially soluble finishing agent or plasticizer
||Some coat linings, buttons, ornaments, etc., contain sizings and plasticizers that are partially soluble in solvent
||Prior to processing, "spot test" with solvent all suspicious-looking fabrics and their accessories
|Defective set of cartridges
||Inadequate separation of pleated filter paper will decrease normal filter area
||Replace defective cartridge
|Failure to purge air from cartridge canister when filling with solvent
||An air space at the top of the cartridge canister will reduce filter paper surface area which can be exposed to the solvent
||Bleed cartridge canister when filling with solvent
||Most waterproofing materials contain waxes which can shorten cartridge life
||Do not extract recently waterproofed garments
|Draining of cartridge housings
||Periodic cartridge housing drainage may cause a coating of fine soil to accumulate on filter paper, thus shortening cartridge life
||If possible, keep filter housings full of solvent at all times
|Continuous operation of solvent circulating pump
||Lint and soil are compressed against the filter paper
||Turn off the circulating pump between loads. This will keep the debris from compressing against the filter paper.