Technical Application

Cat Pumps High Pressure Plunger Pumps Diagnosis and Maintenance

In the high-pressure system, the most important step is to establish a complete regular maintenance, which depends on the different using conditions of each system. To reduce many potential issues occurred, check carefully necessary entrance to the situation and protective equipment before installing system. The following guidelines will help us to make sure the cause and remedy various operating accidents.


Problem Cause Solution
Low pressure Nozzle damage Nozzle replacement
Loose belts Tighten or replace belt
Inlet pipe pieces leak/td> Use PTFE liquid or raw material band to fasten device and hoses.
Gauge failed or inaccurate Check with the new gauge, replace the damaged gauge
Relief valve clogged or improperly adjusted Clean/ regulate relief valve, replace the damaged bearing、valve and O-ring环
Water filter clogged or improper size Clean the filter, choose suitable size of filter and regularly check
Particles in the pump fluid medium Install suitable filter system
Water pipeline leak Replace the water pipeline
Sufficient supply of liquid medium Pressurize Inlet and install C.A.T.
Serious cavitation Exanimate water input situation
Seals aging Replace with new seal repair kit, strengthen maintenance
Inlet / outlet valve damaged ,impurities or too dirty Check filling pressure situation. If lower pressure, please re-pressurize or replace it
Pulse damper Pulse damper failure  
Inlet/outlet valve clogged Clean inlet/outlet valve and components, replace if necessary
Leak    
The Bottom of pump head leak Hi or low pressure seals abrasion Replace seal repair kit and strengthen maintenance
  Bearing O-ring abrasion Replace O-ring
Water seepage into the crankcase Humid air in the crankcase condensed into water Install protective cover , replace lubricant clear crankcase
  Hi/low pressure seal abrasion Replace seal repair kit and strengthen maintenance
Abnormal sound    
Entrance components Insufficient water supply Check fluid supply, increase pip size , pressurize or install C.A.T.
    Check the shaft key and tighten screws
轴承 轴承过旧或损坏 更换轴承
皮带轮 曲轴皮带轮松动 检查曲轴键并顶紧螺丝
漏油    
曲轴箱前油封 曲轴箱前油封老化 更换曲轴箱前油封
油封和O型环 曲轴侧油封或O环老化 卸除轴承端盖，更换O环和油封
泄油口螺帽 泄油口螺帽松动或O环老化 紧固泄油口螺帽或更换O环
窥油镜 窥油镜松动或窥油镜垫圈老化 紧固窥油镜或更换垫圈
后盖 后盖松动或后盖O环老化 紧固后盖螺丝或更换O环
油盖 油盖松动或曲轴箱内注油过多 紧固油盖。注意曲轴箱油位
泵运转十分不稳    
入口处情况 入水口受限或管件密封不良 选用正确的入水管件。检查并紧固密封件
泵浦阀件 出/入水阀件受阻 清理出杂质或更换阀修理包
泵浦密封件 高压水封或低压水封磨蚀或泄漏 更换密封件修理包，加强保养
密封件老化 活塞或柱塞有刮痕 更换活塞或柱塞
进水压力过高 减小入水压力
流体介质中有颗粒物或磨料 在泵浦进水前先行安装过滤系统并定期清洁
泵浦流体介质超压或高温 检查流体介质压力和温度
泵浦干磨 切勿无液体或液体不足时运行泵浦
流体介质供给不足 增加入口管径。增压或安装C.A.T.
泵头腐蚀 更换泵头。检查流体介质的化学性能