??Acid and alkali-resistant hydraulic o-ring

??EPDM EPDM O-ring hydraulic resistance to acid and alkali relatively excellent, but also the material commonly used hydraulic O-ring, the ultimate temperature of -40 ~ 150 ?, long-term use temperature recommendations -20 ~ 130 ?. EPDM its main chain is composed of chemically stable, saturated hydrocarbons, containing only unsaturated double bond in the side chain, so the excellent ozone resistance, heat aging resistance, excellent resistance to chemicals and water steam properties. It can be widely used in building materials with a waterproof material, wire and cable sheathing, heat-resistant hose, tape, automotive seals and other products. EPDM is essentially non-polar, polar solvents and chemical resistant, has good insulating properties. Such as hydraulic EPDM EPDM o-rings in the following cases can be used normally:

??1) at room temperature or 100 ?, sodium hydroxide concentration of 50%;

??2) at room temperature, nitric acid concentration of 10%;

??3) hydrochloric acid, 10% or 30% concentration;

??4) When the room temperature, sulfuric acid concentration of 10%;

??5) at room temperature or 100 ?, the phosphoric acid concentration of 85%.

??We also pay attention to the rubber material to meet the requirements of working conditions, to extend the service life of hydraulic O-rings, the pressure of the working medium can be said to cause permanent deformation of the main reasons Hydraulic O-ring. The higher operating pressure, hardness hydraulic o-ring material should also be higher. General should consider a new formula to increase the flexibility of the material (particularly increased elastic at low temperatures), lowering the compression permanent deformation of materials

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??Temperature is one of the important reasons for accelerated aging of the rubber material, it is also a permanent deformation of the important factors affecting hydraulic O-ring.

??The initial stress due to compressive deformation is formed, as will the relaxation process and the temperature of the hydraulic O-ring decline gradually reduce the role that disappear. And the higher the temperature, the compression set of hydraulic O-ring will be. When the permanent deformation greater than 40%, will lose the ability to seal leaks. Similarly, at very low temperature situations, such as when working in sub-zero temperatures, which may be due to initial compression temperature decreases drastically reduced or disappear completely. Therefore, in the design and use must try to ensure that the seal has a suitable operating temperature, corresponding to the selection, such as XinhuaXu rubber products. The company is committed to continuously improve inventory and develop new products. So as to solve the long cycle of imported products, the problem of higher prices.

??If you have other special needs seals, please contact me directly, I will provide you with any special requirements of ordering services.