Filters (and contamination control) 过滤器（以及污染控制）
ISO 2941 :1974, Hydraulic fluid power - Filter elements - Verification of collapse/burst resistance [2 pp]
ISO 2942: 1994, Hydraulic fluid power - Filter elements - Verification of fabricationintegrity and determination of the first bubble point (Ed. 3) [4 pp]
ISO 2943: 1996, Hydraulic fluid power - Filter elements - Verification of materialcompatibility with fluids [8 pp]
ISO 3722: 1976, Hydraulic fluid power - Fluid sample containers - Qualifying and controlling cleaning methods [2 pp]
ISO 3723: 1976, Hydraulic fluid power - Filter elements - Method for end load test [I p]
ISO 3724:1976, Hydraulic fluid power - Filter elements - Verification of flow fatigue characteristics [2 pp]
ISO 3938: 1986, Hydraulic fluid power - Contamination analysis - Method for reporting analysis data [7 pp]
ISO 3968: 1981, Hydraulic fluid power- Filters - Evaluation of pressure drop versus flow characteristics [7 pp]
ISO 4021 :1992, Hydraulic fluid power - Particulate contamination analysis -Extraction of fluid samples from lines of an operating system (Ed. 2) [6 pp]
ISO 4402: 1991, Hydraulic fluid power - Calibration of automatic-count instruments for particles suspended in liquids - Method using classified AC Fine Test Dust contaminant (Ed. 2) [6 pp]
ISO 4405:1991, Hydraulic fluid power - Fluid contamination - Determination of particulate contamination by the gravimetric method [4 pp]
ISO 4406: 1987, Hydraulic fluid power - Fluids - Method for coding level of contamina-tion by solid particles [4 pp]
ISO 4407:1991, Hydraulic fluid power - Fluid contamination - Determination of particulate contamination by the counting method using a microscope [6 pp]
ISO 4572: 1981, Hydraulic fluid power - Filters - Multi-pass method for evaluating filtration performance [28 pp]
ISO 5884: 1987, Aerospace - Fluid systems and components - Methods for system sampling and measuring the solid particle contamination of hydraulic fluids [14 pp]
ISO 7744: 1986, Hydraulic fluid power - Filters - Statements of requirements [5 pp]
ISO 11170:1995, Hydraulic fluid power - Filter elements - Procedure for verifying performance characteristics [4 pp]
ISO 11217: 1993, Aerospace - Hydraulic system fluid contamination - location of sampling points and criteria for sampling (/Draft endorsement of SAE ARP 4268) [Ip]
ISO 11218: 1993, Aerospace -Cleanliness classification for hydraulic fluids (Adoption of SAE AS4059 Rev. A) [1p]