Cette deuxième édition annule et remplace la première édition (ISO 4406:1987), dont elle constitue une révision technique. Classes de propreté selon ISO 4406: 1999. Codes ISO (contamination des fluides hydrauliques).
La norme ISO 4406:19permet de résumer la répartition des contaminants dans un fluide en comptant . Classification suivant la norme ISO 4406. Le taux de pollution set défini par chiffres indiquant indirectement le nombre de particules solides de taille . Understanding ISO Codes – The ISO cleanliness code (per ISO4406-1999) is used to quantify particulate contamination levels per milliliter of fluid at sizes . Méthode de codification du niveau de pollution particulaire solide. Détermination de la pollution particulaire par comptage . Détermination et codification de la pollution particulaire solide dans les transmissions hydrauliques. ISO 44définit la méthode utilisée pour le codage de la . The International Organization for Standardization (ISO) created cleanliness codes to quantify particulate contamination levels per milliliter of fluid. Transmissions hydrauliques – Fluides – Méthodes de codification du niveau de pollution particulaire solide.
Instances of particle sizes given as “µm(c)” refer to MTD (i.e. ISO Medium Test. Dust) distributions. A Comparison of NAS 16and ISO 44Cleanliness Codes. The NAS system was originally developed in 19to define contamination classes for . One is of a relatively dirty system (ISO 44Code 21/19/17) and the other of a good cleanliness system (ISO 44Code 16/14/1).
This PDF file may contain embedded typefaces. In accordance with Adobe’s licensing policy, this file may be printed or . ISO 4406:19is the current method for coding the level of contamination by solid particles in hydraulic fluid. The international standard ISO 440 “Hydraulic fluid power — Fluids — Method for coding the level of contamination by solid particles” provides a framework for . Achievable Oil Cleanliness in Accordance with ISO 4406. Fitting Tolerance of Hydraulic Components.
Identified as the ISO Solid Contamination Code. ISO 4406:is the reporting standard for fluid cleanliness. According to this standar a code number is assigned to particle count values derived at three . Parameters cand cfor lubricating grease in Eq. Grease cleanliness grade ccISO 4406: À/13/(very clean) 0. The ISO 4406:19cleanliness code table. This is the table for classifying the particle counts in the ISO 44code ranges.
Studies have shown that for each grade the ISO code is lowere the life of a hydraulic component can be doubled or tripled! Particle contamination in oil is specified from particle count. The ISO 44oil cleanliness classification system consists of figures. ISO 4406:19Codes – A three digit code indicating number of particles per milliliter greater than and microns. ISO 4406:Cleanliness Rating, which reports on the particle content of milliliter of oil (approximately equal to one eye dropper).
ISO 4406:19is the internationally recognised method of quoting the solid particulate count in a fuel sample. It is also referred to as the ISO cleanliness code. Determination of filtration rating and efficiency.
Type of hydraulic system and application. Laser light counts particles in a sample to the ISO 44standard; Unacceptable amounts of particles indicate a need for microscopic analysis.
