VACUUM RINGS   K-FLEX rubber expansion joints can resist a negative pressure up to 660 mm Hg (0,88 bar). For vacuum values higher is required to insert on the face of the joint’s corrugation reached inside a steel vacuum ring to prevent that the body of the seal may implode. LIMIT RODS UNITS     DN Tie Rod Units quantity each Kit mm inch ø mm ø mm 32 1 1/4” M 16 300 2 40 1 1/2” M 16 300 2 50 2” M 16 300 2 65 2 1/2” M 20 315 2 80 3” M 20 315 2 100 4” M 20 315 2 125 5” M 20 325 2 150 6” M 24 335 2 200 8” M 24 340 2 250 10” M 24 400 3 300 12” M 24 400 4 350 14” M 24 410 4 400 16” M 27 425 4 450 18” M 27 425 4 500 20” M 27 425 4 550 22” M 27 425 4 600 24” M 30 425 4 Limit rod unit composition Element Quantity n° Tie Rod 1 Plate 2 Nut 4 Washer 2 These provide an additional safety factor because they avoid possible damage to the expansion joints cause by excessive motion of the pipeline greater than movements for which it has been specially designed and manufactured. This excessive motion could be caused specially designed and manufactured. This excessive motion could be caused by the failure of a fixed point or other part in the pipeline. Either compression or elongation movement may be limited or both. The amount of the movement to be limited is set by adjusting the relative nuts and then tightening the locknuts. Limit rods unit must withstand the axial thrust force caused by inner pressure. Compression movement can be limited either with an adjustment nut and locknut or by pipe sleeves (with proper length) installed over the tie rods between the flanged or butter joint. If the joint is also to be subjected to later movement, spherical and not flat washers must be inserted between the nuts and the surface of the flange. Limit rod plates are installed in the mating flanges of pipe and should be equally spaced around the flange. SPECIAL WORKING Giorgi is able to produce and install on rubber joints K-FLEX, flanges with special diameters and any type of material. We make special projects and develop project “ad hoc” and are equipped with all the equipment to meet the needs of each client.

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