GJQ(X)-SF-ⅠFloating Flange Double Sphere Rubber Expansion Joint
GJQ (X) -SF-I type flexible rubber expansion joint belongs to the double sphere type, which is connected with a small edge of the clamping groove type flange.
Compared with single sphere rubber expansion joint, double sphere rubber joint’s advantages are its displacement is larger, instantaneous pressure on the larger deformation and so on, especially when installed in the export part of the pump. When the pump starts, instantaneous pressure is much higher than working pressure; double sphere rubber joint will reflect its advantages. Larger displacement and lower rubber aging speed of double sphere rubber joint will make better effects. However, its draft is very complex, requires high technical, so the cost is very high, thus the application number is smaller than single sphere rubber joint.
Let's use the GJQ DN32 (X) -DF-I type flexible rubber joint and GJQ (X) -SF-I rubber expansion joint as an example to compare. From the inner material and outer material, these two kinds of rubber joints has same material. Compared with GJQ (X) -DF-I type flexible rubber joint, The length of GJQ (X) -SF-I type has 75mm longer than it, also 24mm elongation larger, 40mm compression larger, radial displacement larger .But deflection displacement of the two are the same, which is 7.5 degrees. It is worth mentioning that the GJQ (X) -SF-I rubber joint of DN32 to DN150 has same radial displacement and deflection displacement, which is 45 and 7 mm. But the axial displacement becomes larger with the increase of the rubber joint length。
|3||Framework layer||Polyester cord fabric|
|4||Reinforced bar||Polyester cord fabric|
|5||Flange||Carbon steel or stainless steel|
|6||Reinforced ring||Steel wire rope|
|Axial Movement(mm)||Radial Movement(mm)||Angular Movement|