Free Newsletter
Register for our Free Newsletters
Newsletter
Zones
Advanced Composites
LeftNav
Aerospace
LeftNav
Amorphous Metal Structures
LeftNav
Analysis and Simulation
LeftNav
Asbestos and Substitutes
LeftNav
Associations, Research Organisations and Universities
LeftNav
Automation Equipment
LeftNav
Automotive
LeftNav
Biomaterials
LeftNav
Building Materials
LeftNav
Bulk Handling and Storage
LeftNav
CFCs and Substitutes
LeftNav
Company
LeftNav
Components
LeftNav
Consultancy
LeftNav
View All
Other Carouselweb publications
Carousel Web
Defense File
New Materials
Pro Health Zone
Pro Manufacturing Zone
Pro Security Zone
Web Lec
Pro Engineering Zone
 
 
 
News

New flapper valve strip steel means smaller, more effective air conditioning compressors

Sandvik Coromant UK : 20 June, 2002  (Company News)
Specially formulated for the flapper valves of automotive and stationary air conditioning compressors, the new Sandvik Hiflex
A flapper valve is one of the most important components in an air conditioning system. It is basically a spring made from pre-hardened steel whose function is to regulate the flow of refrigerant gas to and from the compressor through suction and exhaust valves. As such it is subjected to high cyclical loads and impact stresses.

The new Sandvik Hiflex™ stainless strip steel offers increased tensile strength and improved toughness. It has more than 10% greater bending fatigue strength and 25% improvement in impact fatigue resistance when compared with conventional and commonly used flapper valve stainless steels. It enables compressor designers to miniaturise compressors, use thinner valve flaps, increase reliability, or boost compressor efficiency with greater valve lift.

The increase in bending fatigue strength has been made possible through the increased tensile strength of the material. The impact stress resistance has been improved both by the increased tensile strength and by a substantially higher internal damping capacity.

Sandvik Hiflex™ has a bending fatigue strength of ± 750 MPA and a maximum allowable impact velocity of 12.5 m/s (41 ft/s). It enables designers to reduce the size of valves and compressors by using shorter valve tongues to achieve the same valve lift. In addition the new steel allows increased valve lift in order to reduce pressure drop across the valve and boost compressor efficiency. Thinner valve flaps can reduce mechanical losses. The new steel can equally be used to improve the reliability of existing valves prone to fatigue failures.

Proven in field testing, the fatigue resistant properties of the new steel have improved the reliability of compressor exhaust valves produced by a major, US manufacturer of automotive air conditioning systems.

For further information, contact bertil.walden@sandvik.com
Bookmark and Share
 
Home I Editor's Blog I News by Zone I News by Date I News by Category I Special Reports I Directory I Events I Advertise I Submit Your News I About Us I Guides
 
   Â© 2012 NewMaterials.com
Netgains Logo