2 min read

Understanding ISO Codes

By Dustin Flynn on Thu, Feb. 25, 2021

ISO Cleanliness Codes Explained

The ISO Cleanliness Code (per ISO4406-1999) is used to quantify particulate contamination levels per milliliter of fluid at 3 sizes - 4µ, 6µ, and 14µ. It is expressed in 3 numbers (example 19/17/14) where each number represents a contaminant level code for the correlating particle size. The code includes all particles of the specified size and larger.Screen Shot 2021-02-23 at 2.50.37 PMIt is important to note that each time a code increases, the quantity range of particles is doubling. Inversely, as a code decreases by one the contaminant level is cut in half. 

Topics: hydraulic fluid dirt hydraulic filters Gearbox filtration vacuum dehydration filter housing sizing plastic injection molding manufacturer oil darkening mining fluid samples total systems cleanliness metal analysis filter performance paper mill fluid transfer filters hydraulic valve coalesce technology filter cart cleanliness COD hydraulic oil gearbox duplex high-pressure compressor filter elements lube oil turbine oil desiccant demulsibility
2 min read

Hydraulic Valve Performance Test Stands and Clean Oil

By Jim Harlan on Tue, Nov. 29, 2016

The Application

A hydraulic valve manufacturer required pristine fluid (< 14/12/9) to test flow across an 80-micron orifice on their test stand. Gross amounts of contamination in the fluid would skew the test results, invalidating any data collected.

The system held 100 l (26.4 gal ) of ISO VG 32 fluid with a flow rate of 25 lpm (6.6 gpm ).Through observing the manufacturer’s sampling practices, discussing fluid handling best practices and interpreting their lab reports, three independent problems were identified:

Topics: ISO 4406 hydraulic valve samples hydraulic oil
1 min read

Hydraulic Valve OEM System Upgrade Reduces Failures

By Jim Harlan on Fri, May. 24, 2013

cranes and hydraulic valves

The Problem: Hydraulic Fluid Contamination 

A manufacturer of mobile, multi-function valves for heavy lifts and cranes was battling hydraulic fluid and contamination-related failures on four operating production lines.

After facing multiple challenges, including 25 hydraulic pump replacements in a single year due to wear and failure, a finished product consistently testing below quality specifications and fluid repeatedly measuring above suitable ISO code levels, the manufacturer needed a new solution. 

Topics: hydraulic fluid case study hydraulic valve

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