Question 1

Match the filter to your compressor brand/model, OEM part number, working pressure and operating environment. Provide dimensions or photos if no part number is available — we identify the correct product for you.

Accepted Answer

sales@airpulltech.comThe right filter should match your compressor's brand, model, working pressure, and operating environment. Choosing the correct compatible filter helps maintain stable airflow, improve filtration efficiency, reduce energy consumption, and extend equipment life. If you are unsure of the model, simply provide the part number or equipment information and we will identify the correct product for you.5 Key Pieces of Information for Selection1. Compressor brand & modelThe brand/model nameplate is usually on the side of the machine or inside the electrical cabinet2. OEM part numberThe most precise selection method, e.g., 1622-xxxx, 2901-xxxx, 2906-xxxxFound on the old filter label, in the equipment manual, or in the OEM parts catalogEven for discontinued models, the old part number helps us locate a match quickly3. Working pressure & flow rateDischarge pressure (bar / psi) and capacity (m3/min / CFM) affect filter specification selectionHigh-pressure machines require separators with higher pressure ratings4. Operating environmentHigh-dust environments - choose intake filters with higher dust-holding capacityHigh temperature & humidity - ensure the media meets temperature and moisture resistance requirementsCleanrooms / food & pharma - higher filtration ratings may be required5. Existing filter dimensions (if no part number)Outer diameter x height x inner diameter (mm), plus connection thread specsPhotos of the actual part (one each of front / side / connection end)Selection Points by Filter TypeAir Intake Filter Selection PointsMatching dimensions: outer diameter, height, and connection type (flange / clamp / thread) must be identicalDust-holding capacity: for high-dust environments, prefer designs with more pleats and larger surface areaTemperature range: confirm ambient temperature is within the media's allowable range (typically -40C to +100C)Oil Filter Selection PointsFlow matching: the element's oil throughput must be at least the machine's oil pump flow ratePressure rating: must withstand the system's maximum working pressure plus a safety marginMounting style: spin-on vs. cartridge replaceable-element - keep consistent with the original designAir-Oil Separator Selection PointsSeparation efficiency: determines discharge air oil contentPressure design: must meet the separator tank's working pressureDimensions & connections: outer diameter, height, and center-tube thread must match exactly - otherwise oil bypass occursAir handling capacity: the element's rated capacity must be at least the compressor's actual outputCommon Selection Mistakes & ConsequencesDimensional mismatch - too tight to install / too loose, causing leaks or air bypassRating too coarse - inadequate protection; contaminants enter core componentsRating too fine - unnecessary cost, and higher pressure drop raises energy consumptionInsufficient pressure rating - the element deforms or even bursts under high pressure, causing serious failuresMixing brands - differences in materials and workmanship can cause compatibility issuesNot Sure How to Choose? We Can HelpProvide the part number - we directly match the AIRPULL equivalentProvide the brand & model - we search our database and recommend a fitProvide photos/dimensions - our technical team identifies it manually and advisesSend an old sample - free measurement and production of an exact-match compatibleWhy Buying from a Professional Manufacturer Gives You Peace of MindA complete cross-reference database covering 7,000 OEM part numbersEvery product passes dual dimensional and performance inspection before shipmentWrong selection? We cover returns/exchanges (per agreement) - zero risk to youOne-stop purchasing of all three filters with a unified quality system and clear after-sales accountabilityReady to select?Send your information (part number / brand & model / photos / dimensions) to - sales@airpulltech.com   our technical team will provide a precise selection proposal within 8 hours.

Question 2

The air filter cleans incoming air, the oil filter cleans lubricating oil, and the air-oil separator recovers oil from compressed air. They protect the compressor as one system and should be maintained together.

Accepted Answer

sales@airpulltech.comThe air filter removes dust and particulates from the air entering the compressor; the oil filter removes contaminants from the lubricating oil; the air-oil separator extracts lubricating oil from the compressed air and recovers it before discharge. Working together, they protect the compressor's core components, improve compressed-air quality, and keep the equipment running efficiently.Three-Filter Comparison at a GlanceItemAir Filter (Intake)Oil FilterAir-Oil SeparatorLocationCompressor air inletIn the lubricant circulation lineInside the separator tankWhat it filtersDust and particles from ambient airMetal debris, carbon deposits, and contaminants in the oilOil mist and droplets entrained in compressed airMain functionProtects the airend rotors and bearings from wearProtects oil-circuit components such as bearings, shaft seals, and coolersRecovers lubricant and ensures clean discharge airTypical mediaFilter paper / non-woven / polyester fiberFilter paper + metal mesh supportGlass-fiber composite layers + support layersCompatible interval2,000 h2,000 h4,000 hIf it failsInsufficient intake - higher energy use, lower outputPoor lubrication - more wear, more noiseHigher oil carryover, discharge air oil content exceeds limitsAir Filter in Detail (Air Filter / Intake Filter)Location: mounted at the compressor air inlet - the first line of defense for air entering the machineFunction: traps solid particles such as dust, sand, and fibers from the airWhy it matters: a single tiny grain of sand entering the airend can score the precision rotor surfacesCommon types: panel, cartridge (round/oval), and pleated elementsThe harsher the environment, the more frequent the changes: high-dust settings like mines, cement plants, and woodworking shops need more frequent inspectionOil Filter in Detail (Oil Filter / Oil Filter Element)Location: installed in series in the lubricant circuit, typically after the oil pump and before the bearings/coolerFunction: filters out metal wear particles, carbon deposits, and oxidation products generated during oil circulationWhy it matters: clean lubricant is the compressor's lifeblood - the oil filter is its kidneyCommon forms: spin-on (threaded) and cartridge typesEarly first change: new machines generate more contaminants during break-in; the first change is recommended after 500 operating hoursAir-Oil Separator in Detail (Air-Oil Separator / Separator Element)Location: inside the separator tank - the final checkpoint before compressed air is dischargedFunction: uses centrifugal force, gravity settling, and fine filtration to separate entrained oil mist from compressed air and return it to the oil circuitWhy it matters: directly determines discharge oil content - affecting downstream pneumatic equipment and product qualityCommon construction: outer coalescing layer + inner fine-separation layer of dual- or multi-layer glass-fiber compositeThe most expensive of the three filters - but the cost of extended use far exceeds the price of the element itselfHow the Three Work TogetherAir filter failure - dust enters the airend - accelerates oil contamination - shortens oil filter life - intensifies airend wearOil filter failure - contaminants circulate with the oil - clog the separator's micropores - separation efficiency drops - oil carryover increasesSeparator failure - large amounts of lubricant are carried away by the compressed air - oil consumption spikes - may cause low-oil shutdownConclusion: the three filters are one system - a failure in any link affects the others. Synchronized maintenance is recommended.How to Buy the Right Set of Three FiltersMatch OEM part numbers or AIRPULL cross-reference models - avoid leaks or bypass caused by dimensional mismatchDon't buy on price alone - inferior media may seem fine at first but can collapse or rupture within hoursBuy the complete set from one supplier - consistent quality system and clear accountabilityKeep compatible records - helps trace problem sources and optimize future maintenance intervalsNot sure which filters your equipment needs?Send us your compressor brand and model at  sales@airpulltech.com- we will match a complete three-filter solution for you.

Question 3

Air intake filters: every 2,000 hours (500-1,000 in dusty environments); oil filters: first at 500 hours then every 2,000 hours; air-oil separators: every 4,000 hours. Always follow OEM guidelines.

Accepted Answer

Compatible\u0001P0\u0001 intervals depend on operating hours, environmental conditions, and equipment usage. Regular maintenance helps prevent pressure loss, reduce energy consumption, and avoid unexpected downtime. We always recommend following OEM maintenance guidelines.Recommended Compatible Intervals by Filter TypeAir intake filter (air filter)Standard conditions: 2,000 operating hoursHigh-dust environments (mining, cement, woodworking, etc.): shorten to 500-1,000 hoursRule of thumb: replace when the differential pressure gauge exceeds the limit or visible dust buildup appears - no need to rigidly follow the clockOil filterFirst compatible: after 500 operating hours on new machines (more contaminants during break-in)Subsequent intervals: every 2,000 hours, or with each oil changeAir-oil separator (separator element)Standard interval: 4,000 hoursThe separator is critical to oil carryover and energy consumption - extended use is not recommendedReplace immediately if discharge oil content increases or a differential pressure alarm appearsKey Factors Affecting Compatible IntervalsOperating load factor - 24/7 continuous operation requires more frequent compatible than intermittent useAmbient dust concentration - huge differences between industrial workshops, outdoor job sites, and cleanroomsAmbient humidity & temperature - high humidity and heat accelerate media aging and cloggingLubricant quality - inferior or expired oil accelerates oil filter and separator failureEquipment age - older compressors wear more and demand more from filtersPractical Maintenance StrategiesWhichever-comes-first rule - whether the time or the pressure limit arrives first, act on itKeep a maintenance log - record each compatible date, operating hours, and brand/model to build historical dataStock up in advance - purchase ahead based on annual consumption to avoid extended operation due to stockoutsReplace all three together - swap the air filter + oil filter + separator in one maintenance stop, saving labor and downtimeRisks of Extended UseEnergy consumption rises 5%-15% - wasted electricity costsDegraded compressed-air quality contaminates downstream equipment and processesAccelerated wear on core components (bearings, rotors) - repair costs far exceed filter costsSudden failures cause unplanned downtime with incalculable production lossesWhat AIRPULL Can Do for YouComplete three-filter packages - one-stop purchasingPersonalized compatible plans based on your equipment models and usage scenariosDistributor pricing on bulk orders to lower long-term maintenance costsScheduled reminder service (per agreement) so you never miss a compatibleNeed a \u0001P1\u0001 plan for your equipment?Send your compressor brand/model and operating conditions to  sales@airpulltech.com - we will provide detailed maintenance recommendations and a quotation.

Question 4

Key symptoms: increased differential pressure, reduced airflow, higher oil carryover, rising energy consumption and abnormal operation. Replace promptly based on gauge readings, controller alarms and physical inspection.

Accepted Answer

sales@airpulltech.comCommon symptoms include increased differential pressure, reduced airflow, higher oil carryover, rising energy consumption, and abnormal compressor operation. Timely \u0001P0\u0001 helps protect your equipment and maintain stable production.Typical Symptoms of a Clogged Air Intake FilterIncreased intake vacuum - differential pressure gauge reading exceeds the compatible thresholdHigher discharge temperature - insufficient intake raises the compression ratio, noticeably increasing outlet temperatureRising energy consumption - higher motor current for the same air output; abnormal electricity billsReduced air output - the machine struggles to keep up with the load; insufficient pressure at end-use pointsFilter appearance - visible dust accumulation, oil contamination, fiber damage, or end-cap deformationTypical Symptoms of a Clogged Oil FilterIncreased oil-circuit differential pressure - pressure drop across the oil filter exceeds the standard value (refer to the equipment manual)Elevated oil temperature - poor oil circulation leads to inadequate heat dissipationIncreased oil carryover - declining separation efficiency causes abnormally high oil consumptionLouder airend noise - insufficient lubrication causes rotor/bearing wear and abnormal soundsOil darkens faster - failed media lets contaminants recirculate, rapidly degrading the lubricantTypical Symptoms of a Clogged Air-Oil SeparatorExcessive separator tank differential pressure - overpressure triggers the safety valve or a shutdown alarmHigh oil content in discharge air - visible oil accumulation on compressed-air lines, receiver tanks, or pneumatic equipmentFrequent oil top-ups - oil consumption far exceeds historical levels within the normal intervalDeformed or damaged separator element - bulging end caps, collapsed media layers, aged sealing ringsHow to Judge from Instrument DataDifferential pressure gauge - the most direct indicator; when the limit is exceededController alarms - most modern compressors automatically prompt a \u0001P1\u0001 when differential pressure exceeds the limitOperating parameter trends - track historical current, temperature, and pressure changes; abnormal inflection points often mark the end of filter lifeMaintenance timer - inspect regularly per the manufacturer's recommended operating hoursPhysical Inspection MethodsVisual inspection - remove the filter and check color, integrity, and contamination levelWeight comparison - weigh new vs. old filters; when the weight gain exceeds the recommended limitStructural check - confirm whether pleats have collapsed, end caps are loose, or sealing rings have hardenedDestructive sampling (optional) - cut open an old element to analyze internal clogging distribution and media agingConsequences of Delayed CompatibleEnergy waste - a clogged filter increases system resistance and adds unnecessary electricity costsEquipment damage - chain failures such as bearing wear, rotor scoring, and oil-circuit blockageProduct quality risk - oily/dusty compressed air contaminates production processes (painting, food, electronics, etc.)Unplanned downtime - sudden failures interrupt production lines, costing far more than the filter itselfCompatible RecommendationsFollow OEM-recommended intervals, shortened appropriately for actual operating conditionsHigh-dust / high-humidity / high-temperature environments require more frequent inspectionInspect wear parts such as gaskets and O-rings at the same time as compatibleUse AIRPULL high-quality compatible filters for stable performance and better valueNot sure whether your filter needs compatible?Send the equipment model, current operating parameters, and filter photos to sales@airpulltech.com - our technical team will provide diagnostic advice.

Question 5

Yes. From OEM part numbers, dimensional data, drawings or physical samples we manufacture compatible filters for discontinued models via reverse engineering, with prototypes typically in 3-7 working days.

Accepted Answer

sales@airpulltech.comYes. Based on OEM part numbers, dimensional data, technical drawings, or physical samples, we can manufacture compatible filters for discontinued or hard-to-source compressor models.How We Handle Discontinued-Model Requests1. Information gathering - you provide any of the following: OEM part number, photos/physical sample of the old filter, dimensional data, or drawings.2. Reverse engineering - our technical team performs dimensional measurement, material analysis, and structural teardown of the sample.3. Solution confirmation - we issue a compatible proposal with clear key-parameter comparisons and performance commitments.4. Sample validation - first-article samples are produced for your on-machine testing.5. Bulk delivery - stable supply begins once testing is passed.Information You Can Provide (Any One Is Enough)OEM part number - even if discontinued, our historical database may still have a recordCompressor brand + model - e.g., Sullair LS20S-100H or Fusheng SA37APhysical sample of the old filter - send us an old part for reverse engineering (most recommended)Dimensional measurements - outer diameter x height x inner diameter, connection thread specs, and sealing surface typeTechnical drawings - if you have original engineering drawings or manual screenshotsCoverage of Common Discontinued ModelsLegacy European & American models - e.g., early Atlas Copco GT/GA series, Ingersoll Rand SSR/T seriesDiscontinued Japanese & Korean brands - e.g., Hitachi OSP series, Kobelco KNW seriesOlder Chinese equipment - e.g., early Kaishan / Fusheng / Hanbell modelsNiche / imported second-hand equipment - custom production is possible as long as a sample or drawing can be providedWhy Choose AIRPULL for Discontinued compatibleStrong reverse-engineering capability - full sample measurement and material analysis capacityTraceable materials - filter media equal to or better than OEMFast turnaround - typically only 3-7 working days from receiving the sample to delivering the prototypePerformance guarantee - compatible filtration efficiency and service life not lower than OEM standardsNotesFor first-time cooperation, we recommend ordering samples for actual on-machine validation firstSome extremely rare models may require new tooling; costs and timelines are evaluated per projectIf the machine has exceeded its design life, we recommend evaluating the overall unit condition in parallel to ensure safe operationNeed filters for a discontinued model?Send whatever information you have (even just a photo) to  sales@airpulltech.com- we will assess feasibility and propose a solution.

Question 6

Yes. Provide the OEM part number, compressor model, dimensions or photos, and our technical team recommends the correct compatible filter plus alternatives within 24 hours, backed by a 7,000-part cross-reference database.

Accepted Answer

sales@airpulltech.comYes. Simply provide the OEM part number, compressor model, dimensions, or product photos, and our technical team will recommend the correct compatible filter along with suitable alternatives.You Can Provide Information in Any of the Following WaysOEM part number - The fastest and most accurate method (e.g., 1622-xxxx, 2901-xxxx)Photos of the actual filter - one each of the front, side, and connection end, clearly showing the shape and markingsDimension data - outer diameter x height x inner diameter (in mm), plus connection thread specificationsPhoto of the old part's nameplate - if the old filter still has a label or stamped informationOur Identification Process1. You submit any one or more of the above via email / online form / WeChat.2. Our technical team completes database matching and manual verification within 24 hours.3. We recommend a primary compatible model plus 1-2 alternatives (if available).4. A technical comparison chart is included: OEM vs. AIRPULL key parameters.5. Once confirmed, samples or bulk quotations can be arranged immediately.Brand CoverageMajor European & American brands: e.g., Atlas Copco / Ingersoll Rand / Sullair / Kaeser / Gardner DenverJapanese & Korean brands: e.g., Hitachi / Kobelco / DoosanChinese brands: e.g., Kaishan / Fusheng / Hanbell / etc.Other brands: If your equipment is not listed above, provide photos or the nameplate and we will match them one by oneOur cross-reference database currently covers 7,000 OEM part numbers and is continuously updated.Why Choose AIRPULL Compatible FiltersFully compatible - dimensions, filtration rating, and pressure rating identical to OEM partsReliable performance - made with imported glass fiber / polyester filter media, with efficiency meeting or exceeding OEM standardsCost advantage - significant savings compared to OEM parts, with even better pricing for volume ordersStable supply - not affected by single-brand supply chain fluctuations, with controllable lead timesTechnical guarantee - incorrect match? We cover the return/exchange risk (per agreement)Handling Special CasesModel cannot be determined - we accept old-part samples for reverse engineering and analysisDiscontinued/rare models - custom production based on actual dimensions, with small-batch solutions availableMixed fleet scenarios - we help consolidate a complete site filter list for unified procurement, reducing management costsNeed to identify a filter model?Send whatever information you have (part number / photos / dimensions) to  sales@airpulltech.com and we will provide the matching result.

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