ASR Technology. 1  ControlMaster Elite VFD + A-motor = ASR. 2  Intelligent speed control - the right speed at the right time! 3  Extended speed range at light loads (<40 4 %) Adjustable speed range at heavier loads (> 40 %) Rated speed at full load is half the rated speed of equivalent 2-speed hoist.
The mineral pyrite, or iron pyrite, also known as fool's gold, is an iron sulfide with the chemical formula FeS2. This mineral's metallic luster and pale brass-yellow hue give it a superficial resemblance to gold, hence the well-known nickname of fool's gold. The color has also led to the nicknames brass, brazzle, and Brazil, primarily used to refer to pyrite found in coal. Pyrite is the most common of the sulfide minerals. The name pyrite is derived from the Greek ÏÏÏÎ¯ÏÎ·Ï (pyritÄs), of fire or in fire, in turn from ÏÏÏ (pyr), fire.
Hand-specimens of pyrite are usually easy to identify. The mineral always has a brass-yellow color, a metallic luster and a high specific gravity. It is harder than other yellow metallic minerals and its streak is black, usually with a tinge of green.he only common mineral that has properties similar to pyrite is marcasite, a dimorph of pyrite with the same chemical composition but an orthorhombic crystal structure. Marcasite does not have the same brassy yellow color of pyrite.