1. ISO 4406:1999 Codes – A three digit code indicating number of particles per milliliter greater than 4, 6, and 14 microns Specifying proper filtration has become more difficult since the days of “nominal” rated filters.
2. ISO 4406:1999 Code Chart Range Particles per milliliter Code More than Up to/including 24 0 8000 4000 200 100 50 2500 17 640 1300 16 320 640 15 160 320 14 80 160 13 40 80 12 20 40 11 10 20 10 5 10 9 2.5 5 8 1.3 2.5 7 0.64 1.3 6 0.32 0.64 UNDERSTANDING ISO CODES.

1. Iso 4406 Pdf Parker
2. Iso 4406 Standard Pdf
3. Iso 4406 Pdf Free Download
4. Norma Iso 4406 Pdf

ISO 4406 Fluid used in hydraulic systems 1999 ISO 4407 Hydraulic fluid systems 1991 ISO 11218 Hydraulic fluids 1993 ISO 12345 Fuel injection equipment 2013 ISO 14952 Launch vehicles 2003 ISO 16232 (A) Fluid circuits of motor vehicles 2007 ISO 16232 (N) Fluid circuits of motor vehicles 2007 ISO 16232 (V) Fluid circuits of motor vehicles 2007.

The international standard ISO 4406, “Hydraulic fluid power — Fluids — Method for coding the level of contamination by solid particles” provides a framework for reporting the concentration of contamination particles in hydraulic oil using an automatic particle counter (like the Hiac or Accusizer 780). The older standard published in 1987 required particle concentration be reported at two sizes: 5 & 15 µm. This has been replaced in the new standard published in 1999 with three sizes; 4, 6 & 14 µm.

A three number scale is used to report the particle count – the first number represents the particles/ mL > 4 µm, the second number represents the particles/ mL > 6 µm, and the third number represents the particles/ mL > 14 µm. A scale number is assigned to a particle concentration range as shown in Table 1 below.

Number particles/mL

The results should be presented as three numbers separated by slashes, such as 24/20/14. This result would refer to:

more than 80 000 and up to and including 160 000 particles equal to or larger than 4 μm

more than 5 000 and up to and including 10 000 particles equal to or larger than 6 μm /hp-g62-windows-10-drivers.html.

more than 80 and up to and including 160 particles equal to or larger than 14 μm

The most critical quality of hydraulic fluid you should consider is that of cleanliness. Tenda driver for windows 10. We refer to the size and quantity of particle contamination when discussing cleanliness, and so that we are all on the same page, standards were created for measuring and expressing this quality. Although the standard for oil cleanliness has changed over the years, we’re at a point in history when we all seem to agree on the method to test and express fluid contamination. This standard is world-wide, which for the fluid power industry and its plethora of global organizations, is quite astonishing in and of itself.

ISO 4406:1999 is the current method for coding the level of contamination by solid particles, as spelled out by the International Organization for Standardization, which is more affectionately known by its acronym, ISO. Its method has been developed to test and measure the average size and quantity of particles within a given volume of fluid, which in this case is one milliliter.

The particles are measured by specialized machines using a laser to count the size and number of particles breaking the beam as they flow past. Based on the data collected from the machine, three sizes of particles considered most damaging in a hydraulic system are averaged out and expressed as per milliliter. The particle sizes are 4, 6 and 14 μm, chosen because of their potential to cause damage between moving surfaces separated by full film lubrication, such as the spool and body in a directional control valve. To give you an idea of how fine even the largest 14-μm particle is, note that it is only just over ½ a thousandth of an inch.

Each of the defined particle sizes are expressed in a given range, rather than the actual particles measured in the test. This allows for both easy expression and forgiving test results, as no particle counter can accurately measure every single 4-μm particle in a milliliter of fluid. The number of particles of each size is expressed as a single number between 0 and 28, where 0 is exactly zero particles, and 28 represents up to 2.5 million particles per ml. Both numbers are rare extremes, as even new oil has infinitely more particles than 0, and if you have 2.5 million of any given particle size, you’re in a whole heap of trouble.

Iso 4406 Pdf Parker

Iso 4406 Standard Pdf

If you refer to the attached diagram, you can see the numbers are first expressed in 4 μm, with 6 and 14 μm following, respectively. Each number represents a range, and in the example, 22 represents between 20,000 and 40,000 of the 4- μm particles in just one milliliter of fluid, even though the machine measured 22,340 particles. It goes on to show between 1300 and 2500 6- μm particles, and between 40 and 80 14- μm particles.

Iso 4406 Pdf Free Download

Every number represents double the range of particles, and this is an important consideration. This means that an ISO Code of 22/18/13 has quadruple the particles as an ISO Code 20/16/11, so don’t be misled by small increases in the ISO Code. Because this system is now a worldwide standard, hydraulic manufacturers publish minimum requirements of ISO 4406 cleanliness. A piston pump manufacturer would specify at least 19/17/14, for example.

Norma Iso 4406 Pdf

So now that you’re familiar with the ISO cleanliness code, you can monitor and decipher your quarterly oil sample reports (you are sampling your oil quarterly, right?).