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Home » Pump Maintenance » Are you facing troubles with your vertical multistage pump? Check out this simple Guide

Are you facing troubles with your vertical multistage pump? Check out this simple Guide

Posted: 31/03/2021
Category: Pump Maintenance

Troubleshooting Guide for Vertical Multistage Pumps

Vertical multistage pumps are built to last. When installed correctly, these pumps run for years without any issues. The actual life of your pump depends on several variables including: Type of the liquid pumped The temperature of the pumped liquid Application type No. of times the pump starts and stops Pump operating speed and more While vertical multistage pumps are workhorses, there comes a time in the pump’s life when troubles begin to crop up. Identifying the underlying trouble before it snowballs into a major issue is crucial to ensure consistent pump operation. In this guide from Sintech, one of the best vertical multistage pump manufacturers in India, we highlight the common troubles faced by vertical multistage pumps and how to resolve them. First things first, Why should you learn to troubleshoot vertical multistage pumps? Irrespective of the type of industry, pumps occupy the center stage in major industrial applications. Pump breakdown or unplanned downtime can cause the entire operation to come to a standstill. It not only interrupts the regular operational schedule but is also costly. Hence, it’s critical that your pump operators identify trouble in the bud and nip it before it becomes a major critical issue. How to identify vertical multistage pump troubles? Each pump has a signature mode of operation – its own characteristic vibrations and sounds. Think of it like a distinct trademark of your pump. Once you know what is normal for your pump, you can quickly spot excessive vibrations. Increased or inconsistent vibrations are one of the major signs of pump troubles. Other signs to look for include:
  • Excessive leakage
  • Decreased flow rate
  • Strange noises
If you notice any of these signs, then you can be sure of an impending pump breakdown. Other signs that are not evident on the outside include: Loose impellers Worn out parts Corrosion or abrasion of pump parts To identify these issues, you need to disassemble the pump and look inside. While it’s not possible to cover all vertical pump troubleshooting signs in this guide, we’ll cover the most common signs so that you can identify and rectify an impending issue as early as possible. Common Reasons why your Vertical Multistage Pump is not working as Intended and Possible Causes Vertical Multistage Pump – Troubleshooting Guide Issue-Insufficient pressure Possible Causes Loose impeller Plugged (blocked) impeller Worn rings Air entrainment in the pump Wrong rotation Bowl castings Leaking column joints Issue-Slow pump operation speed Possible Causes Voltage fluctuations Issue-No liquid delivered at the outlet Possible Causes Broken pump suction Closed suction valve Wrong rotation Broken or unscrewed shaft Loose impeller Clogged strainer Issue-Insufficient pump capacity Possible Causes Loose impeller Partially plugged impeller Leaking joints Partially clogged strainer Low water level Throttled suction valve Low water level Issue-The pump uses too much power Possible Causes High operational speed Improper impeller adjustment Misaligned or bent shaft Too heavy lubricating oil Sand, silt, or foreign material lodged in the pump Issue-Pump makes an excessive or abnormal noise Possible Causes Bearings run dry Broken shaft Foreign material lodged in the pump Pump cavitation Impellers dragging on the pump bowl Issue-Excessive Vibration Possible Causes Imbalance in the motor Incorrectly balanced motor bearings Misalignment of the pump Bent shafts Misalignment of the discharge head Vortex problems in the sump Clogged impellers Foreign materials lodged in the pump

*Note that some of these possible causes are repeated across various issues. So, finding the right reason for your issue can be quite tricky.

Sintech – Your Trusted Vertical Multistage Pump Manufacturer in India

As one of the leading vertical pumps manufacturers in India, we also offer extensive troubleshooting service to all our customers. If you require any further guidance on how to identify the issues with your existing pumps, get in touch with our pump experts and we can help you out. We supply our pumps all over the world. We also offer extensive pump service and spare parts for the pumps we supply across the globe.

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