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Dandong Machine Hermetically Research Institute

优良品质追求 技术领先 信誉至上注重工作细节,注重服务品质

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About Us/

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 Dandong Machine Hermetically Research Institute is a professional manufacturer & exporter specialzing in Mechanical Seals.

   Our company & factory was established in 1997 and located in Dandong city,Liaoning province which is the biggest border city in China,and besides the Yalu River which is famous for it's boundary river between China and North Korea. Taking the advantage of geography superiority for logistics service we have facilitated transportations and communications.

   Our products featured by Mechanical Seals, Pump seals, esp. welded metal bellow mechanical seal. We can manufacture the mechanical seal according to your drawing.

   Our products are mainly used in High-Temperature, High-Pressure, High-speed, Corrosion, rough working conditions widely applied in petrochemical, power, paper, pharmacy, water, sewage, automobile, etc. industries. 

   With superior equipment, experienced engineers & technicians, ISO 9001 quality management systems, cheap materials resourcing and flow line production, we ensure you lower prices, superior quality and faster delivery.


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Technical support/

测量注意事项
1、测量时,平晶和工作需要在相同的温度下才能得到正确的结果。2、当使用钠光灯时,通电后3~5min,钠光灯才能正常工作。3、平晶是精密的量具,它的硬度低,使用中容易磨损和划伤,因此
机械密封的使用
机械密封是在我所推行ISO9001:2000质量管理体系的情况下制造出来的优等品,安装使用时的注意事项如下:1、密封件的确认a、确认所安装的密封是否与要求的型号一致。b、安装前要仔
机械密封的泄露途径
对于内装式机械密封的泄露,主要表现为以下渠道:1、摩擦副端面之间2、补偿环辅助密封圈处3、非补偿环辅助密封圈处4、机体与压盖结合端面间5、轴套与转轴之间6、碳石墨环有渗漏孔隙以及从
摩擦副端面之间泄露
1、端面不平 端面平面度、粗糙度未达到要求,或在使用前受到损坏,因而产生泄漏。2、端面间存在异物 污物未被清除,装配进未清洗。3、安装不正确①安装尺寸未达到图纸
补偿环辅助密封圈处的泄漏
1、辅助密封圈质量问题,端面尺寸超差,压缩率不符合要求,错位、开模缩裂、休边过量、流痕、凹凸缺陷、飞边过大等。2、密封圈安装时受到损伤。3、轴表面有缺陷或有腐蚀、麻点、凹坑。4、密
非补偿环密封圈处的泄漏
1、压盖尺寸公差不符合设计要求2、安装错误  3、密封圈的质量不良4、密封圈的材质与介质不相容。
机体与压盖结合面之间的泄漏
1、机体与压盖配合端面有缺陷。2、螺栓紧固力小 3、垫片或密封圈受到损伤 4、安装时不清洁,异物进入其间。5、压盖变形,这是因为压盖刚度不够二产生的变形。6、螺