Wastewater Treatment capabilities vary by coupling manufacturer, style and size, but a range of 3-6 mm of linear movement and 1 degree of angular deflection are typical for 100 mm and larger couplings. A pipe joint utilizing a bolted splitsleeve coupling can take on several different profiles, depending on the type of coupling selected. Bolted split-sleeve couplings are used to join standard pipe with or without restraint rings welded onto the pipe-ends. There are several components of a bolted split-sleeve coupling: a one- or two-piece coupling body, O-ring gaskets, sealing plates, and studs, nuts and washers. To create a joint, the O-rings are positioned on each pipe-end and the pipeends are aligned. The coupling body is then centered on the joint so that the O-rings are seated in the arches of the body, and the restraint rings, if present, are properly engaged. A sealing plate is inserted between the coupling body and O-rings at each opening. A closure tool is used to bring the closure plates of the coupling body together so that the
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Bolted split-sleeve couplings for aeration systems can be specified as restrained or non-restrained, depending on the type of expansion, angular deflection or axial movement anticipated.
hardware can be inserted and tightened. The joint is complete when the coupling body is in full contact with the restraint rings and pipe around its circumference. Bolted split-sleeve couplings are available in a variety of restrained and non-restrained styles. Those most com-
monly specified for aeration systems include non-restrained flexible couplings, restrained flexible couplings and non-restrained flexible expansion couplings. Non-restrained flexible couplings enable angular deflection and limited continued overleaf...
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