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Spiral-wound gaskets comprise a mix of metallic and filler material. [7] Generally, the gasket has a metal (normally carbon rich or stainless steel) wound outwards in a circular spiral (other shapes are possible) with the filler material (generally a flexible graphite) wound in the same manner but starting from the opposing side. This results ...
Non-metallic gaskets are used with flat- or raised-face flanges. Spiral-wound gaskets are used with raised-face flanges, and ring-joint gaskets are used with ring-type joint (RTJ) flanges. Stress develops between an RTJ gasket and the flange groove when the gasket is bolted to a flange, leading to plastic deformation of the gasket. [4]
This type of flange has no choke or gasket grooves. The through-mounted assembly is made evident by the distinct colours of the copper waveguide-tube and brass flange. A waveguide flange is a connector for joining sections of waveguide , and is essentially the same as a pipe flange —a waveguide , in the context of this article, being a hollow ...
Spiral rings. Spiral retaining rings are axially installed into housings/bores (internal) or onto shafts (external), making 360° contact with the groove. Spiral retaining rings have no ears or lugs to interfere with the assembly. These rings are manufactured by coiling flat wire into the shape of the finished retaining ring.
NGC 3344 has the morphological classification (R)SAB(r)bc, [6] which indicates it is a weakly barred spiral galaxy that exhibits rings and moderate to loosely wound spiral arms. [10] There is both an inner and outer ring, with the prominent arms radiating outward from the inner ring and the slightly elliptical bar being situated inside.
NGC 1350 measures roughly 130,000 light years across: slightly larger than our own galaxy, the Milky Way.It is classified as an Sa(r) galaxy, meaning that it is a spiral with arms wound tightly enough to form a prominent central ring.
NGC 1530 has a morphological classification of type SB(rs)bc [5] in the de Vaucouleurs system, which means it is a barred spiral galaxy (SB) with a transitional outer ring structure (rs) that joins somewhat loosely wound arms (bc). The bar structure in this galaxy is unusually large and strong, spanning an angular size of 100″.
The morphological classification of NGC 2997 is SAB(rs)c, [4] indicating a weakly-barred spiral galaxy (SAB) with an incomplete ring around the bar (rs) and loosely-wound spiral arms (c). It is inclined at an angle of 40° to the line of sight from the Earth, with the major axis aligned along a position angle of 110°. [9]
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