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NAPA Auto Parts was established in 1925. [30] Some NAPA Auto Parts stores are owned and operated by GPC, but most are independently owned and operated. [31] There were approximately 6,000 NAPA Auto Parts stores in 2020. [30] GPC acquired UAP Inc. of Canada in 1998 and the Australian car parts supplier Exego Group in 2013.
The National Automotive Parts Association (NAPA, also known as NAPA Auto Parts), is an American retailers' cooperative distributing automotive replacement parts, accessories, and service items throughout North America. Established in 1925, NAPA is a division of Atlanta-based Genuine Parts Company.
A reciprocating compressor or piston compressor is a positive-displacement compressor that uses pistons driven by a crankshaft to deliver gases at high pressure. [ 1 ] [ 2 ] Pressures of up to 5,000 psig are commonly produced by multistage reciprocating compressors.
Principal view of the pumping action of a twin-screw pump with a six-lobe female screw and a five-lobe male screw. A compressor (as opposed to a pump) would be shaped the same way, except that the shape of the lobes would change along the length of the screw, so that the volume of the trapped pockets would get squeezed smaller as they get closer to the exhaust port.
Compressor characteristic is a mathematical curve that shows the behaviour of a fluid going through a dynamic compressor. It shows changes in fluid pressure , temperature , entropy , flow rate etc.) with the compressor operating at different speeds.
Atlas Copco companies develop, manufacture, service, and rent industrial tools, air compressors (of which it is the world's leading producer), [8] construction and assembly systems. The Group operates in four areas: Compressor Technology, Vacuum Technology, Power Technology and Industrial Technology.
The compressor pressure ratio is the ratio of the stagnation pressures at the front and rear of the compressor of a gas turbine. Overall pressure ratio in a high-bypass turbofan is a function of inlet pressure ratio and compressor pressure ratio: O P R = I P R × C P R {\displaystyle OPR=IPR\times CPR}
The photograph included in this section depicts a three-stage diaphragm compressor used to compress hydrogen gas to 6,000 psi (41 MPa) for use in a prototype hydrogen and compressed natural gas (CNG) fueling station built in downtown Phoenix, Arizona by the Arizona Public Service company (an electric utilities company).