FluidTech News

 Pipeline Centrifugal Pump Vibration and Abnormal Noise: 6 Common Mechanical and Hydraulic Causes Pipeline centrifugal pumps are widely used in industrial circulating water systems, HVAC systems, cooling-water loops, building water supply, pressure boosting, and general industrial fluid transfer. Under normal operating conditions, a centrifugal pump should run with relatively stable vibration and noise levels. If a pump suddenly begins to vibrate noticeably, produce unusual noise, or transmit vibration into the connected piping, the problem should not automatically be blamed on the pump itself. In practical troubleshooting, Shanghai Shangcheng Pump & Valve Manufacturing Co., Ltd. generally recommends checking the problem from two directions: mechanical causes and hydraulic causes. The following six conditions are among the most common. 1. Poor Suction Conditions and Cavitation If the pump produces an irregular sound similar to gravel, crackling, or small impacts inside the casi...

 Fluorine-Lined Magnetic Pump vs. Stainless Steel Magnetic Pump: Can They Handle Liquids with Trace Particles? Magnetic drive pumps are widely used in chemical processing, pharmaceuticals, electroplating, acid and alkali handling, and other applications where leakage prevention is important. However, real process liquids are not always perfectly clean. A common question is: Can a magnetic drive pump be used if the liquid contains a small amount of fine particles, suspended solids, or crystals? Another question usually follows: Which is better for this condition—a fluorine-lined magnetic pump or a stainless steel magnetic pump? According to the application experience of Shanghai Shangcheng Pump & Valve Manufacturing Co., Ltd., the first question should not be whether the pump is fluorine-lined or stainless steel. The more important questions are: How large are the particles? How much solid is present? How hard are the particles? Can they settle or crystallize? These factors ofte...

 Water Ring Vacuum Pump Scaling Causing High Power Consumption? 4 Ways to Remove and Prevent Scale Water ring vacuum pumps are widely used in chemical processing, pharmaceuticals, paper manufacturing, food processing, vacuum filtration, vacuum dewatering, and industrial gas-handling systems. After operating for a period of time, some users encounter a common problem: The motor current gradually increases, power consumption rises, while vacuum performance begins to decline. In more serious cases, the pump may also develop higher noise, vibration, overheating, or even difficulty starting. When the motor and bearings appear normal, one possible cause deserves particular attention: Scale buildup inside the water ring vacuum pump. This problem is especially common when hard water or untreated circulating water is used as the working liquid. So why does scaling increase pump power consumption, and how can it be removed and prevented? Why Does a Water Ring Vacuum Pump Develop Scale? A wat...

 Fluorine-Lined Chemical Pump vs. All-Titanium Pump: Which Offers Better Value for Highly Corrosive Service? In chemical processing, electroplating, acid pickling, pharmaceutical production, wastewater treatment, and other corrosive-fluid applications, pump material selection can directly affect equipment life, maintenance costs, leakage risk, and production reliability. For highly corrosive service, two solutions are often considered: fluorine-lined chemical pumps and all-titanium alloy pumps. At first glance, the comparison seems simple. Fluorine-lined pumps generally have a lower initial cost, while titanium pumps use a more expensive metallic material. But does a higher material cost automatically mean better corrosion resistance? No. The better choice depends on the chemical composition, concentration, temperature, pressure, solids content, operating conditions, and total lifecycle cost. Why Are Fluorine-Lined Pumps Commonly Used for Corrosive Chemicals? A fluorine-lined chemi...

 High-Viscosity Sludge Transfer: How to Reduce Stator Wear in Progressive Cavity Pumps Progressive cavity pumps, also known as single screw pumps, are widely used for high-viscosity sludge transfer, dewatered sludge handling, filter press feeding, concentrated sludge, and other difficult-to-pump fluids. Their main advantages include stable flow, relatively low pulsation, good suction capability, and the ability to handle viscous fluids that are difficult for conventional centrifugal pumps. However, one problem is frequently encountered in sludge applications: Why does the stator wear so quickly when pumping high-viscosity sludge? In many cases, the problem is not simply poor stator quality. Rapid stator wear is often caused by a combination of dry running, excessive pump speed, abrasive solids, high differential pressure, poor suction conditions, and incorrect stator material selection. Why Does High-Viscosity Sludge Cause Stator Wear? The pumping elements of a progressive cavity p...

 Pneumatic Diaphragm Pump Keeps Stopping? 3 Common Air Valve and Diaphragm Problems Pneumatic diaphragm pumps, also known as air-operated double diaphragm (AODD) pumps, are widely used in chemical processing, wastewater treatment, coatings, mining, food processing, and industrial fluid transfer. One of the most common operating problems is also one of the most confusing: The compressed air supply appears normal, but the pump suddenly stops. After restarting the air supply, the pump may run again for a while and then stop once more. When an AODD pump repeatedly stalls or stops, the air supply is not always the real cause. After checking external air pressure and air volume, three components deserve particular attention: the air valve, air valve seals, and diaphragms. 1. Air Valve Sticking or Failing to Shift The air distribution system is the heart of an AODD pump. Compressed air is alternately directed to the two air chambers, pushing the diaphragms back and forth. This continuous ...