, Seal failure following three main reasons: (1), the sealing surface when opened in the repair of mechanical seals, 85 percent of seal failure is not due to wear and tear caused by 125FSB-50 mechanical seal, but had been leaked before wear. When the sealing surface is opened, the medium of solid particles into the sealed surface under the action of the liquid pressure, the sealing surface is closed, these solid particles can be embedded soft ring (usually right ink ring) of the surface, which has become a real " Wheel "will damage the hard ring surface. Since the rubber ring or rings fastened to the shaft (sleeve), when the shaft moving string, the ring can not be fit 25FSB-18L mechanical seal, leaving the sealing surface to open, and a closed hysteresis sealing surface of the mechanical seal, it The solid particles from entering the sealing surface. There are also between the shaft (sleeve) and the sliding parts have solid particles affect rubber ring or ring slide (relative dynamic seal point, common fault). In addition, the media also have a rubber ring and the shaft (sleeve) friction parts crystals 40FSB-20L mechanical seal, there will be in the spring at the solid material, will open the sealing surface. HU7 structure characteristics: HU7 type mechanical seal complies with DIN24960 and GB / T6556-94 standard, alternative 108U-type mechanical seal, unbalanced, conical spring structure, the spring rotation about the axis of rotation. Vice friction materials and auxiliary materials should be selected according to the actual conditions. Scope: Sealed Medium: sewage pumps, submersible pumps, chemical pumps, circulating pumps, water pump and heating system. Seal chamber pressure: ≤1Mpa sealed chamber temperature: -20 ℃ ~ 180 ℃ line speed: ≤15m / s HUU803 structure characteristics: HUU803 type mechanical seal complies with DIN24960 and GB / T6556-94 standard, non-balanced, multi-spring structure Two-Face, driving sleeve. Seal chamber pressure must be higher than the medium pressure 0.1-0.2Mpa. Vice friction materials and auxiliary materials should be selected according to the actual conditions. Scope: Sealed Medium: acid, alkali, salt, water, toxic and flammable vapor pressure medium sealed chamber: ≤1.6Mpa sealed chamber temperature: -50 ℃ ~ 150 ℃ line speed: ≤20m / s Zhenjiang mechanical seal _25FSB-10L mechanical seal _ corrosion fluorine plastic pump) provided by Anguo City Pump Co., Ltd. Shi Yuan. 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.