FluidTech News

 Cutting Sewage Pumps for Fibers and Rags: When Are They the Right Choice? Wastewater does not always contain only water and small solid particles. In many industrial and domestic sewage systems, the real trouble comes from rags, hair, plastic film and long fibers. These materials may not look difficult to pump, but once they wrap around the impeller, they can quickly cause reduced flow, higher motor current or even complete pump blockage. This is where a cutting sewage pump can be useful. Why Are Fibers More Difficult Than Solid Particles? A conventional non-clog sewage pump is generally designed with a relatively large flow passage so that certain solid particles can pass through the pump. Fibrous materials behave differently. Rags, hair and long fibers are flexible and easy to wrap around rotating components. Even relatively small pieces can accumulate around the impeller or inlet. Therefore, when selecting a sewage pump, particle size is not the only consideration. The type and...

 Why Do Chemical Pump Mechanical Seals Keep Leaking? 3 Installation Details You Should Not Ignore Mechanical seal leakage is one of the most common problems during chemical pump operation. Many users replace the mechanical seal repeatedly but still experience leakage after a short period of operation. In many cases, the problem is not only the seal itself — incorrect installation and operating conditions are often the real causes. For chemical pumps, mechanical seal installation details directly affect equipment reliability and service life. 1. Improper Installation Causes Uneven Seal Wear A mechanical seal works by maintaining close contact between the rotating ring and stationary ring to prevent liquid leakage. During installation, problems such as: Damaged sealing faces Incorrect installation position Improper compression adjustment Poor shaft alignment can cause uneven pressure on the sealing surfaces. After continuous operation, abnormal wear may occur, eventually resulting in...

 Gear Oil Pump vs High Temperature Oil Pump: How to Choose the Right Solution for Heat Transfer Oil and Lubricating Oil Transfer Keywords: gear oil pump, high temperature oil pump, heat transfer oil pump, lubricating oil transfer pump, industrial oil pump selection Description: Choosing the right oil pump is critical for stable operation in industrial heating systems and lubrication applications. This article explains the differences between gear oil pumps and high temperature oil pumps, and how to select the suitable pump according to temperature, viscosity and working conditions. Gear Oil Pump vs High Temperature Oil Pump: Selection Guide for Industrial Oil Transfer In industrial production, heat transfer oil and lubricating oil are widely used in heating systems, machinery lubrication, chemical processing and other fields. Choosing a suitable oil transfer pump directly affects system efficiency, equipment life and operating stability. Many users often confuse gear oil pumps with...

Plunger vs. Diaphragm Metering Pumps: How to Choose for Water Treatment Dosing Metering pumps are widely used in water treatment systems to inject chemicals accurately and continuously. Two common options are plunger metering pumps and diaphragm metering pumps. So, which one is better? The answer depends mainly on the chemical, pressure, flow rate and safety requirements. 1. Plunger Metering Pump: Strong Pressure Performance A plunger metering pump uses the reciprocating movement of a plunger to draw in and discharge the liquid. Its main advantages include: High discharge pressure capability Accurate and stable dosing Relatively direct mechanical structure Suitable for stable and less corrosive liquids For applications where the chemical is relatively stable and the system requires higher pressure, a plunger metering pump can be a practical choice. However, its sealing structure requires particular attention when handling corrosive, toxic or hazardous chemicals. 2. Diaphragm Metering P...

 Why Does a Liquid Ring Vacuum Pump Need Circulating Water? Key Operating Factors for Stable Vacuum Performance Liquid ring vacuum pumps are widely used in chemical processing, vacuum filtration, evaporation, drying, degassing, power generation, and many other industrial vacuum systems. Unlike many dry vacuum technologies, a water-ring vacuum pump depends on a continuous supply of operating liquid—most commonly water. This often leads to a practical question: Why is circulating water so important, and what happens when its flow rate or temperature is incorrect? The answer is simple: water is not merely a cooling medium. It is an active part of the vacuum-generation process. The Water Ring Is Part of the Pumping Mechanism Inside a liquid ring vacuum pump, the impeller is installed eccentrically relative to the pump casing. When the impeller rotates, centrifugal force pushes the operating liquid toward the outer wall of the casing, creating a rotating liquid ring. Because of the ecce...

Why Does the Operating Current of a Submersible Pump Increase? Common Causes and Troubleshooting Methods Submersible pumps are widely used in wastewater treatment, drainage systems, industrial water supply, construction projects, and underground water pumping applications. During normal operation, the motor current of a submersible pump should remain within the rated range. However, after a period of operation, some users may notice: Increasing motor current; Higher motor temperature; Abnormal vibration or noise; Frequent overload protection trips. These symptoms indicate that the pump may be operating under abnormal conditions. So, why does the operating current of a submersible pump increase? What factors cause the motor load to rise? 1. Increased Load Caused by Changes in Pumping Medium The operating current of a submersible pump is closely related to the motor load. When the characteristics of the pumped liquid change, the resistance inside the pump system may increase. Common situ...