gene dianetti hose products division parker hannifin
TRANSCRIPT
Gene Dianetti
Hose Products Division
Parker Hannifin Corporation
Repairing or making a custom A/C hose assembly? Finding components might be the easy part. Not all
components are the same! How do you know these components are reliable or meet industry standards?
What are the MAC industry requirements?
Why this is important. What is the impact beyond a dissatisfied customer?
How do you verify components meet these requirements?
How do you find this information?
Many products on the market make claims that they meet industry, SAE or OEM requirements.
The good news is, yes there are many that meet these stringent requirements!
Are you aware there is an SAE standard which requires certification to these claims?
The SAE Interior Climate Control Standards Committee is supported and represented by individuals from Automotive OEM’s, Suppliers, Industry Experts, MACS and Government Agencies.
This committee is responsible for the creation and maintenance of SAE Standards for MAC systems.
SAE J2064 “Coupled Automotive Refrigerant Air-Conditioning Hose Assemblies” ISSUED JUN 1993, CURRENT VERSION AUG 2015
SAE J3062 “Automotive Refrigerant Air-Conditioning Hose Requirements” NEW STANDARD ISSUED JUN 2015
SAE J2911 “Procedure for Certification that Requirements for Mobile Air Conditioning System Components, Service Equipment, and Service Technician Training Meet SAE J Standards” ISSUED FEB 2011, CURRENT VERSION DEC 2016
Highlighted From Standard Scope Covers hose containing R134a, R1234yf and lubricant Hose must minimize permeation and be functional from -30 C to 125 C Separates hose requirements from SAE J2064
Set’s requirements for hose performance Describes hose types, identification Hose is tested with refrigerant and oil Refrigerant Permeation, Moisture Ingression Burst strength, vacuum flattening (collapse) Ability to couple hose to fittings (coupling integrity) Additional material requirements beyond the standard
Requirements normally specified by Automotive OEM’s
Materials Compatibility (Additional OEM Requirements): Hose must be compatible with various compressor oils and refrigerants
Materials must not change in physical properties once exposed to these fluids, i.e. volume swell, tensile and elongation (hose material can swell, shrink or become brittle and crack
Material after exposure to an incompatible fluid
Material before exposure
Ability to Create a robust and reliable seal with the hose coupling: Compression set
The permanent deformation remaining when the applied force is removed. If excessive, could result in leakage past fitting once exposed to heat in the application
“Push back” of the material provides sealing force
Compression SetDeformation Before heat
Deformation after heat
Highlighted From Standard Scope Sets requirements for coupled hose assemblies
Provides the necessary values used in SAE J2727 Mobile Air conditioning System Refrigerant Emission charts for R-123a and R-1234yf
Hose used in assembly must meet requirements of SAE J3062 and be certified to SAE J2911
Assembly must meet Permeation, Coupling Integrity, burst strength and cleanliness
Must be properly designed to seal and provide strength
Fitting must be clean!
Good Bad!!
Use of correct fittings, proper crimping dies and dimensions as specified by each manufacturer. Do not use Company A components and Company B crimp!
Excessive crimping causes nipple collapse
No Worm gear clamps!Good hose couplings have specified components and crimp dies – Do not mix!
If a manufacturer or seller advertises their products as certified to an SAE standard, they must follow this standard.
Certification of a product is voluntary: however, this certification process is mandatory for those who advertise that their product meets all requirements of an applicable SAE standard
Burst Stand
Tensile Tester
Constant Temp Ovens
Thermal Chamber
Moisture Ingression Stand
Refrigerant Charging and Reclaim
Where do you find this information?
http://macdb.sae.org/
I-MAC (Improved Mobile Air Conditioning) facilitated by an SAE Cooperative Research Program to reduce refrigerant emissions
The work to improve mobile A/C systems, components, service equipment and new mobile A/C systems continues under the stewardship of SAE International’s Interior Climate Control Standards Committee.
2016 Field
Service Survey
MAC industry has put a great deal of effort into establishing requirements and producing high quality components. This can be achieved in service using “qualified” components
Costs involved with losing a customer, your reputation and not solving the issue
Environmental impact R134a GWP value = 1430 (One pound of 134a leaked to the
atmosphere is equivalent to the same environmental impact as 1,430 pounds of CO2!)
MAC systems and components have improved considerably over the last 20 years
Continue learning and applying best practices when servicing A/C systems to maintain quality levels
Select qualified components and assembly techniques which meet the requirements of the standards referenced in this presentation established by industry experts
