Français
1. Air compression and expansion
1.1 Air composition
It varies from place to place. Pure, dry air can be considered a perfect gas because its components are, at the pressures generally used, far from the critical point (≈ 150 K and 50 bar). This is the ideal case.
The physical constants of typical dry air, as defined by the International Civil Organization (ICAO), are as follows:
molar mass: M = 28.9644 kg/kmol ;
atmospheric pressure at sea level: 101 325 Pa ;
temperature at sea level: 15 °C ;
density at sea level: 1.225 kg/m 3 ;
universal perfect gas constant: R =...
The Ultimate Scientific and Technical Reference
This article is included in
Hydraulic, aerodynamic and thermal machines
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Air compression and expansion
Industrial compressed air quality
Standardization
France
Association française de normalisation AFNOR
- Transmissions pneumatiques. Vérins 8 bar, simple et double tige. Alésages 25 mm à 200 mm. Dimensions d'interchangeabilité, accessoires et fixations. - NF E 49-001 - 12-92
- Raccordements pour transmissions pneumatiques. Raccords filetés. Tubes métalliques et plastiques. - NF E 49-051 - 06-73
- Acoustique. Code d'essai acoustique pour les compresseurs...
Manufacturers. Suppliers
Non-exhaustive list
Compressors
Atlas Copco Compressors http://www.atlascopco.fr
Burton Corblin http://www.burtoncorblin.com
Organizations
AFIR French Association of Valve Industries
CNOMO Comité de normalisation des moyens de production http://www.cnomo.com
Federation of Mechanical Engineering Industries http://www.fim.net
SNCT Syndicat national de la chaudronnerie,...
The Ultimate Scientific and Technical Reference
