FluidTech News

 Why Does a Gear Oil Pump Lose Pressure Over Time? Common Causes and Troubleshooting Guide Gear oil pumps are widely used in lubrication systems, fuel transfer systems, hydraulic equipment, and industrial machinery because of their compact structure, reliable operation, and stable pressure performance. However, during long-term operation, many users encounter a common problem: The gear oil pump pressure gradually decreases after running for a period of time. At the beginning, the system works normally, but later the pump may show: Lower outlet pressure; Reduced oil supply; Increased operating noise; Unstable equipment lubrication. Why does this happen? The pressure decline is usually related to internal wear, oil conditions, suction problems, and system components. 1. Internal Gear Wear Increases Leakage A gear oil pump works by using the meshing movement of two gears to transport oil from the inlet side to the outlet side. During normal operation, the clearance between gears and t...

Why Are Rotary Lobe Pumps Suitable for High Viscosity Fluid Transfer? Key Advantages Explained In industries such as food processing, pharmaceuticals, cosmetics, chemicals, and environmental engineering, fluid transfer often involves materials with high viscosity. Typical examples include: Syrup; Honey; Cream products; Resin; Adhesives; Lubricating oil; High concentration chemical liquids. These materials have poor fluidity and high internal resistance, making them difficult to handle with conventional centrifugal pumps. For these applications, rotary lobe pumps are widely used because of their unique operating principle and gentle transfer characteristics. 1. Why Are Centrifugal Pumps Not Ideal for High Viscosity Fluids? Centrifugal pumps generate pressure through high-speed impeller rotation. They work well with: Water; Low viscosity liquids; Fluids with good flow characteristics. However, when viscosity increases, several problems appear: Pump efficiency decreases; Flow rate drops; ...

 Why Do Chemical Pumps Often Experience Mechanical Seal Leakage? Causes and Prevention Methods In chemical processing industries, pumps are required to handle various challenging fluids, including corrosive chemicals, high-temperature liquids, solvents, and fluids containing solid particles. Compared with ordinary water pumps, chemical pumps operate under much harsher conditions. One of the most common maintenance problems is: Mechanical seal leakage. Many operators find that a chemical pump works normally after installation, but after a period of operation, leakage begins to appear. Why does this happen? The answer is usually related to fluid characteristics, operating conditions, seal material selection, and maintenance practices. 1. Corrosive Fluids Damage Mechanical Seal Components Chemical pumps often transport: Acids; Alkalis; Organic solvents; Corrosive chemical solutions. If the mechanical seal materials are not suitable for the pumped medium, corrosion may occur. Typical p...

How Does Impeller Size Affect Flow Rate and Head of CDLF Stainless Steel Multistage Centrifugal Pumps? In industrial water supply systems, reverse osmosis pretreatment, boiler feed water, equipment circulation, and pressure boosting applications, CDLF stainless steel multistage centrifugal pumps are widely used because of their compact structure, stable pressure performance, and corrosion-resistant design. During pump selection, many users have a common question: “Does a larger impeller always mean higher flow and pressure?” The answer is not simply yes. The impeller size has a direct impact on pump performance, but the final operating condition also depends on the system resistance, motor power, and operating point. Understanding the relationship between impeller size, flow rate, and head is important for correct pump selection. 1. What Is the Function of an Impeller in a CDLF Pump? A CDLF pump is a vertical multistage centrifugal pump. Inside the pump, multiple impellers are arranged...

What Happens When the Suction Lift of a Self-Priming Pump Exceeds the Rated Height? Self-priming pumps are widely used in industrial water supply, wastewater treatment, chemical transfer, and other applications because they can automatically evacuate air from the suction line and start pumping without manual priming every time. However, during installation, one common mistake is often overlooked: The suction lift of the self-priming pump exceeds the designed limit. When the pump is installed too high above the liquid level or the suction pipeline is too long, the pump may experience poor suction performance, unstable operation, or even damage. So, what happens when the suction lift exceeds the specified height? What Is Suction Lift of a Self-Priming Pump? Suction lift refers to the vertical distance between the liquid surface and the centerline of the pump inlet. In simple terms, it represents how high the pump needs to lift the liquid before it can transport it. Although self-priming ...

 Why Are Screw Pumps More Stable for Handling Fluids with Solid Particles? Structural Advantages Explained In industries such as wastewater treatment, chemical processing, oil production, food processing, and environmental engineering, transporting fluids containing solid particles has always been a challenge. Many conventional pumps may experience problems when handling particle-containing media, including: Impeller blockage; Severe wear; Unstable flow; Reduced operating efficiency. Screw pumps, especially progressive cavity screw pumps, are widely used in these applications because of their excellent adaptability to complex fluids. So why can screw pumps transport particle-containing media more reliably? The answer lies in their unique positive displacement structure. 1. Continuous Conveying Structure Reduces Blockage Risk Unlike centrifugal pumps that rely on high-speed impellers to generate centrifugal force, screw pumps transport fluids through the continuous movement of seale...