Brief introduction Double Mechanical seal

1. Richest（ （HK） ）Development Limited Brief introduction Double Mechanical seal Mechanical seal is most widely used for centrifugal pump in the petrochemical industry. Double mechanical seal is more popular in the situation that seal is strictly required. In this paper, double mechanical seal is briefly analyzed and discussed in the theory, structure and routine maintenance on the basis of single mechanical seal. Principle of Double mechanical seal The principle of double mechanical seal and single mechanical seal is basically same, both of them are perpendicular to the axis of the rotating end face (friction pair) in fluid pressure and the effect of elastic compensation institutions and with the cooperation of the auxiliary seal up keep post merger relative sliding and prevent fluid leak device. When double mechanical seal structure is working, the fluid pressure (medium pressure) and the elasticity of elastic element function caused by pressure, on the end of sealing ring produces an appropriate pressure, making the two contact face (rotating seal ring and static ring end face) fit closely to each other, and in a very small gap between the two end maintain a very thin layer of liquid membrane, so as to achieve the purpose of sealing. Characteristic Double mechanical seal Double mechanical seal has two end of mechanical seal. If primary mechanical seal loses effect, Secondary mechanical seal is still working, so as to prevent leakage. Generally, double mechanical seal needs to provides sealing liquid system. Pouring sealing liquid into the seal cavity, which can plug, lubricate and cool. Besides, it also can be recycling used for cool down. Sealing liquid can not only improve double mechanical seal flush friction pair work environment, but also serve as an important detection means to check if the primary sealing surface is failure. Richest is a leading double mechanical seal manufacturer. Richest offers a comprehensive range of cartridge mechanical seals, single seal, or double seal, which is alternative to Flowserve pump seal and John crane seal, for worldwide customers’choice from its China based supplier. Emial1： sales@riseals.com Tel: 86-512-58620036 Website: http://www.rcmechanicalseal.com/ Add：No.26 Jiangong Road Nanfeng Town, Zhangjiagang City，Jiangsu Province，China Email2: sales@rcmechanicalseal.com Fax: 86-512-58620036