1、INNOVATIVE FLUID POWER 3 Overview ISO 4406 Code Cleanliness levels are defined by three numbers divided by slashes (/.) These numbers correspond to 4, 6, and 14 micron, in that order. Each number refers to an ISO Range Code, which is determined by the number of particles for that size (4,6, & 14m) a
2、nd larger present in 1 ml of fluid. Each range is double the range below. Refer to the chart below to see the actual ranges. Achieving the appropriate cleanliness level in a system The only way to achieve and maintain the appropriate cleanliness level in a hydraulic or lubrication system, is to impl
3、ement a comprehensive filtration program. HYDAC offers all of the products that are needed to do just that! - They include: Solid Contamination pressure filters return line filters offline filtration loops oil transfer units for precleaning of new oil portable and online contamination monitors reser
4、voir breathers and filler/breathers Water Content water content sensors reservoir breathers with silica gel desiccant vacuum dehydration water removal units water removal elements Fluid Analysis bottle sampling kits complete analysis kits 23/21/18 17/15/12 20/18/15 14/12/9INNOVATIVE FLUID POWER 4 Ov
5、erview Finding the cleanliness level required by a system 1. Starting at the left hand column, select the most sensitive component used in the system. 2. Move to the right to the column that describes the system pressure and conditions. 3. Here you will find the recommended ISO class level, and reco
6、mmended element micron rating. FREE Poster! The information on these two pages is also available on our ISO Cleanliness Guidelines poster. Visit our web site to request your FREE copy. Low/Medium Pressure Under 2000 psi (moderate conditions) High Pressure 2000 to 2999 psi (low/medium with severe con
7、ditions 1 ) Very High Pressure 3000 psi and over (high pressure with severe conditions 1 ) ISO Target Levels Micron Ratings ISO Target Levels Micron Ratings ISO Target Levels Micron Ratings Pumps Fixed Gear or Fixed Vane 20/18/15 20 19/17/14 10 18/16/13 5 Fixed Piston 19/17/14 10 18/16/13 5 17/15/12
8、 3 Variable Vane 18/16/13 5 17/15/12 3 not applicable not applicable Variable Piston 18/16/13 5 17/15/12 3 16/14/11 3 (2 Valves Check Valve 20/18/15 20 20/18/15 20 19/17/14 10 Directional (solenoid) 20/18/15 20 19/17/14 10 18/16/13 5 Standard Flow Control 20/18/15 20 19/17/14 10 18/16/13 5 Cartridge
9、 Valve 19/17/14 10 18/16/13 5 17/15/12 3 Proportional Valve 17/15/12 3 17/15/12 3 16/14/11 3 (2 Servo Valve 16/14/11 3 (2 16/14/11 3 (2 15/13/10 3 (2 Actuators Cylinders, Vane Motors, Gear Motors 20/18/15 20 19/17/14 10 18/16/13 5 Piston Motors, Swash Plate Motors 19/17/14 10 18/16/13 5 17/15/12 3 H
10、ydrostatic Drives 16/15/12 3 16/14/11 3 (2 15/13/10 3 (2 Test Stands 15/13/10 3 (2 15/13/10 3 (2 15/13/10 3 (2 Bearings Journal Bearings 17/15/12 3 not applicable not applicable not applicable not applicable Industrial Gearboxes 17/15/12 3 not applicable not applicable not applicable not applicable
11、Ball Bearings 15/13/10 3 (2 not applicable not applicable not applicable not applicable Roller Bearings 16/14/11 3 (2 not applicable not applicable not applicable not applicable 1. Severe conditions may include high flow surges, pressure spikes, frequent cold starts, extremely heavy duty use, or the presence of water 2. Two or more system filters of the recommended rating may be required to achieve and maintain the desired Target Cleanliness Level.
