Single sphere rubber joint use of rubber high elasticity, high, medium resistance and weather resistance and radiation resistance, can reduce the vibration and noise of pipeline, and can be caused by the temperature change of heat bilges cold shrink compensation effect, so the product is widely used in: chemical industry, construction, water supply, water drainage, oil, light and heavy industry, freezing, sanitary, plumbing, fire protection, electric power and other infrastructure. With the increase of demand, the market is flooded with all kinds of rubber joint are also good and evil people mixed up, so discern the stand or fall of rubber joint also becomes more important. Teach you a few actions under the simple and practical method.
1: look carefully rubber joint sphere, touched with the hand, good rubber joint color hair black. If there is a lot of rub off on their hands or micro granulated rubber means that there is something wrong with the quality of the rubber joint machine.
2: look at the flange: cast iron flanges have trachoma; toughness is poor, percussion chaos.
3: take two specifications of rubber joints, without flange. Second, from the height of the same vertical throw down, to spring up high quality rubber joint, spring up low for ordinary rubber joint:
4: in the sunlight or lamplight, see its color, rubber to fake good rubber with poor effect will be treated with preview, color black, shiny, and high quality rubber joint can present a natural rubber.
5 depends on production process, good rubber joint use of rubber elasticity, high air tightness, medium resistance, weather resistance and radiation resistance, such as a little, high strength, strong cold heat stability of polyester cord fabric after oblique with the compound, through high pressure, high temperature mold vulcanization. Also on opposite sides, the rubber joint within the rubber to join steel wire circle, so more to improve the performance of rubber joint, increase the service life. A lot of manufacturers, in order to maximize the profit of, so as to cut corners, not join polyester cord fabric in the rubber, steel wire circle; this greatly reduces the rubber joint in the use of compression strength, sometimes lead to burst because of the stress.
The above methods are very intuitive to distinguish rubber joint, avoid deceived want consumers to polish eyes
