For poor quality graphite ring (ring) is concerned, its large internal porosity, this is because in the manufacturing process, the aggregation caused by the expansion of gases inside the graphite carbon particles blown out, so this low-quality graphite ring seal is enabled, the carbon particles can easily fall off, leaving the sealing surface of the stick when the seal is disabled. Cylindrical surface of the inner sealing surface scars are likely to be outside the debris into the sealing surface or improper installation. The sealing surface of the annular groove, the majority of solid particles is deposited on the sealing surface caused. Crack graphite ring (ring) is due to the vibration transmission member, the internal stress of the rubber ring and the swollen graphite ring itself caused ISW125-315A mechanical seal, while coke is caused due to high temperature, this high temperature in refinery Hot oil medium is common. Fuming sulfuric acid, nitric acid, hydrofluoric acid, sodium secondary green, aqua regia, over hydroxides erosion of graphite have several strong oxidant, corrosion effect exacerbated with increasing temperature. Usually hard ring (stationary ring) hot surface can cause severe wear of the seal ring, without the vertical pump cooling. At high temperature, high pressure, spring compression is too large, the shaft will move through the lower string is large, will cause excessive wear ISW125-315 mechanical seal sealing surface, the hard surface of the ring when checking four signs Note: a, ceramic ring rupture; c, nicks;; d, coating off b, thermal cracking. First, the definition of mechanical seals and hydraulic seals: Mechanical seals are precision, one of the more complicated mechanical structure foundation element ISW125-250B mechanical seals, a variety of pumps, reaction synthesis reactor, turbine compressors, submersible motors and other key components. Sealing performance and service life depends on many factors, such as the accuracy of selection, the machine, the correct installation and so on. Hydraulic seal pressure demands to have some combination of surface roughness, more rubber sealing element, to achieve the effect by local deformation of the closure seal. Second, mechanical seals and hydraulic seals mechanical seal type classification: cartridge seal series, light mechanical seal series, heavy machinery, such as hydraulic seals seal series: lip seals, V-ring, U-shaped ring, Y-ring, YX-ring hydraulic cylinder seals commonly used combinations and mostly bud rings, cell to circle and Lancaster closure. Mechanical seals, ISW125-250A mechanical seals, pipeline pumps (certified merchants) provided by Anguo City Pump Co., Ltd. Yuan Shi. Shi Yuan Yasukuni City Pump Co., Ltd. (www.shiyuanbeng.com) is specialized in the "IS centrifugal pump, XA centrifugal pump, BA centrifugal, B-type pump, double suction centrifugal pump" of the enterprise, the company of "honesty, hard service "concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Geng wheat.