Installation instructions:
the suitable type must be selected according to the working pressure, connection mode, medium and compensation quantity of the pipeline, and the quantity should be selected according to the requirement of noise reduction and displacement.
When the pipeline produces instantaneous pressure which is greater than the working pressure, a tap higher than the working pressure should be selected. (for example, when the instantaneous pressure > 1.0mpa is started, the worker shall be selected as the connector of 1.6mpa. When the instantaneous pressure > is 1.6mpa, the connector of 2.5mpa should be selected).
When the medium of pipeline is acid-base, oil, high temperature and other special materials, joints with a gear higher than the working pressure of pipeline should be selected.
Flanges for rubber joints shall be valve flanges or GB/T9115.1 (RF) flanges.
5 normal applicable medium can be curved around the rubber joint is a normal water temperature from 0 to 60, such as special medium: oil, acid and alkali, high temperature and corrosion resistance and other hard cases, should choose the corresponding materials resistant rubber joints, do not blindly string or gm.
When the flexible rubber joint is used in the inlet and outlet of water pump, it should be located at the side near the water pump. the metal reducing diameter joint should be installed between the rubber joint and the water pump, and it should be installed at the large diameter of reducing diameter.
7 when the pipe displacement is greater than or equal to the maximum compensation of the joint, the number of joints should be increased to parallel the displacement. It is strictly prohibited to adjust the out-of-tolerance of the pipe, so that the joint is in the state of extreme scrambling displacement and deviation, not to exceed the limit (stretching, displacement, deflection, etc.). the specific installation data is shown in the table below.
8. for high-rise water supply or suspended water supply, the pipe should be fixed on the hanger, bracket or anchor frame, and the joint should not bear the weight and axial force of the pipe, otherwise, the joint should be equipped with anti-pulling device (the bearing capacity must be greater than the axial force of the pipe).
When installing the rubber joint, the screw rod of the bolt should be extended to the outside of the joint, and the bolt of each flange end face should be tightened repeatedly and evenly according to the method of diagonal pressure to prevent pressure deviation. Screw joint should use standard wrench to tighten uniformly, do not use the force bar to increase the force of the live joint wire, sliding edge and fracture, and to check regularly, so as not to loose the dish or water seepage.
after the rubber joint bears the pressure for the first time (such as: installation pressure test, etc.) or before it is used again after long-term service, the bolt should be re-pressurized and tightened before it is put into operation.
Avoid high temperature, ozone, oil and acid-base environment when using or storing rubber joints. Shading frame should be built for outdoor or sunny and windward pipelines. Insolation, rain and wind erosion are strictly prohibited. the joint surface is strictly prohibited from painting and winding insulation materials. Rubber products due to aging problems, should be timely inspection and replacement.
