- Double-headed, right-handed, convex
Screw composed of two driven screw an active screw - double, left, concave screw, installed in the pump body, and other components constitute a screw pump. Working principle: V dense formation: must meet the four sealing conditions, in order to form a seal product: master and slave screw conjugate, the number of screws and the number of threads must meet a certain relationship, the minimum length of the pump body should be greater than the lead screw, guaranteed Minimum radial clearance, in order to form a space eight-letter sealed volume. The left side of the oil absorption V density change: When the active screw counterclockwise rotation <Right pressure oil pressure port separated: The above four sealing conditions Features: Simple structure, small size, light weight, stable operation, low noise, long life, Uniform flow, self-absorption ability, high volumetric efficiency, no trapped oil phenomenon; but the screw tooth complex, difficult to process, the accuracy is difficult to guarantee.
Asphalt Tile
Asphalt roof tiles is a type of roof shingle that uses asphalt for waterproofing. It is one of the most widely used roofing covers in North America because it has a relatively inexpensive up-front cost and is fairly simple to install.
Two types of base materials are used to make asphalt tile, organic and fiberglass. Both are made in a similar manner, with an asphalt-saturated base covered on one or both sides with asphalt or modified-asphalt, the exposed surface impregnated with slate, schist, quartz, vitrified brick, stone,or ceramic granules, and the under-side treated with sand, talc or mica to prevent shingles from sticking to one-another before use.
Asphalt Tile,Asphalt Roof Tiles,Asphalt Floor Tiles,Bituminous Tiles
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