Modern industry can use rubber joint in high temperature environment.
What are the aspects need to test the performance of rubber joint
A, rubber joint has excellent weather aging resistance, ozone resistance.45 days of ozone concentration is 0.01% in air, there is no obvious crack.Rubber joint of weather aging resistance, ozone resistance and excellent.
2, rubber joint vacuum excellent performance: rubber joint has good vacuum performance.Rubber joint basic formula of the vulcanizates vacuum degassing rate is only 37 x 10-6 torr liters per second. Cm.Rubber joint has been successfully used in the vacuum conditions of 10 to 9 torr.
Three, rubber joint mechanical properties: fine rubber joint has excellent physical and mechanical properties.High temperature resistance of fluorine rubber joint with general strength between 10 to 20 mpa, elongation at failure between 150 ~ 350%, the tear strength between 3 ~ 4 kn/m.Generally, rubber joint at high temperature compression deformation is large, but if compare with the same conditions, such as from 150 ℃ under the same time the compression set, neoprene is bigger than fluorine rubber.
Four, the scope of application: rubber joint because the rubber joint has high vacuum and high temperature resistant, oil resistant, resistant to acid and alkali resistance, the characteristics of a variety of chemicals, have been used in modern aviation, automobile, shipbuilding, chemical, petroleum, telecommunication, apparatus, machinery and other industrial fields.
How much is the temperature of the rubber joint use
1. The rubber joint general applicable temperature - 200 ~ 70 ℃. Instantaneous temperature is 115 ℃, using temperature is 70 ~ 115 ℃.
2. The flange rubber joint, in the work pressure and working temperature is higher (size 200 and above, temperature above 70 ℃ above, the working pressure of 1.5 Mpa), equipped with optional flange rubber joint spacing device.
3. Rubber and rubber joint flange connection, when installation of connecting flange bolts should respectively from the inner side of the flange on both ends of the string to the flange, want to hand in washer and spring washer, bolt to gradually tighten the diagonal.
Union rubber joint connection, when installed on each union do not exchange, lest cause leaks or damage to the product.
Installing a rubber joint, joint screw should be extended to the outside of the bolt each end of the flange bolts according to the method of diagonal compression repeatedly evenly tighten, prevent partial pressure.Threaded connection should use standard wrench tight uniform force, do not use a torque stem strength makes the union slippery silk, smooth edges and fracture, and to periodically check, lest cause off or loose.