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FLOW DIAGRAMCURRENT · v1.0.0DIAG-SERVICE-INTERVAL-FLOW

Service Interval Planning Decision Flow

Documents the ISO 3724/SAE J1299 service interval calculation method as a decision flow so engineers can systematically derive replacement intervals from measured or estimated DHC, environment-specific ingestion rates, and application safety factors. The output interval is a planning target requiring field validation.

Service Interval Planning Decision FlowFlowchart for filter service interval planning per ISO 3724:2007 and SAE J1299:2008. Four sequential steps: measure DHC from ISO 16889 multipass test; classify operating environment and select contamination ingestion rate; apply safety factor per environment; calculate service interval I_s = DHC × Sf ÷ (C_in × Q × 60). Includes field verification side note and formula reference.FILTER SERVICE INTERVAL PLANNINGISO 3724:2007 · SAE J1299:2008STEP 1 — MEASURE DHCISO 16889 multi-pass test — or — media area [m²] × capacity factor [g/m²]Cellulose: 50–150 g/m² · Synthetic: 100–300 g/m² · Glass-fiber: 150–400 g/m²Output: DHC [g]STEP 2 — CLASSIFY OPERATING ENVIRONMENTSelect typical contamination ingestion rate C_in from SAE J1299:2008 Table 2CONSTRUCTION1.0–3.5 mg/Ltypical: 2.0 mg/LAGRICULTURE0.3–1.5 mg/Ltypical: 0.8 mg/LINDUSTRIAL0.05–0.3 mg/Ltypical: 0.15 mg/LSTEP 3 — APPLY SAFETY FACTORSAE J1299:2008 Annex D — accounts for ingestion rate uncertaintyConstruction: Sf = 0.65Agriculture: Sf = 0.75Industrial: Sf = 0.85Lower Sf → shorter (more conservative) intervalSTEP 4 — CALCULATE SERVICE INTERVALI_s = DHC × Sf ÷ (C_in × Q × 60)DHC [g] · Sf [dimensionless] · C_in [mg/L] · Q [L/min] → I_s [hours]ISO 3724:2007 §6SERVICE INTERVAL I_s [hours]planning target — verify against field dataFIELD VERIFICATIONMonitor ΔP indicator oroil cleanliness code (ISO 4406)Adjust Sf if interval is short/longISO 3724:2007 · SAE J1299:2008
Flowchart for filter service interval planning per ISO 3724 and SAE J1299. Start oval: Filter Service Interval Planning. Step 1 box: Measure DHC via ISO 16889 multipass test or estimate from media area × capacity factor, result in grams. Step 2 box: Classify operating environment — construction 2.0 mg/L typical ingestion, agriculture 0.8 mg/L, industrial 0.15 mg/L per SAE J1299 Table 2. Step 3 box: Apply safety factor — construction 0.65, agriculture 0.75, industrial 0.85 per SAE J1299 Annex D. Step 4 box: Calculate service interval I_s = DHC × S_f divided by C_in × Q × 60, result in hours. End oval: Service Interval I_s in hours. Side note: verify against field data and adjust safety factor if needed.

GOVERNING STANDARDS

ISO 16889

ELIMFILTERS TECHNOLOGIES

MACROCORE™
SYNTRAX™
NANOFORCE™

APPLICABLE SYSTEMS

Air Intake Protection
Hydraulic Protection
Lubrication Protection
Fuel Cleanliness Protection

REVISION METADATA

Versionv1.0.0
Statuscurrent
Last Reviewed2026-07-08
Next Review2027-07-08

RELATED ENGINEERING ARTICLES

→Service Intervals
→Dust Holding Capacity
→Contamination Ingression Modelling
→Total Cost Of Ownership