FluidTech News

 Key Parameters Often Overlooked When Selecting a Screw Pump: Viscosity, Temperature, Differential Pressure & Shear Sensitivity Screw pumps are widely regarded as reliable, low-pulsation positive displacement pumps, making them a go-to choice for viscous fluids and demanding industrial services. However, many premature failures or performance problems occur not because of the pump itself, but because four critical selection parameters are overlooked during the design phase: 👉 viscosity, temperature, differential pressure, and allowable shear limits. For more technical insights and real-world considerations, see: 🔗 https://www.scpv.cn/news/387.html 1. Viscosity: Not Just a Number on Paper Viscosity is often treated as a secondary concern, yet it is one of the most important factors influencing screw pump performance. A fluid’s viscosity directly affects: Actual flow rate (high viscosity reduces effective pumping volume) Required torque (higher viscosity demands higher torque f...

 What to Do When a Magnetic Pump Fails: Common Fault Causes and Step-by-Step Repair Guide Magnetic pumps are widely used in chemical processing, wastewater treatment, plating, pharmaceuticals, and other industries because of their leak-free design and high safety performance. However, a failed magnetic pump can disrupt production and lead to costly downtime if handled improperly. To help you troubleshoot and repair effectively, this article analyzes the common causes of magnetic pump failure and the recommended repair steps. For reference and case examples, see: 👉 https://www.scpv.cn/news/877.html 1. Understand What “Magnetic Pump Failure” Really Means A magnetic pump doesn’t have a traditional mechanical seal — but it still has critical components that can fail, including: Isolation sleeve Magnetic couplers Sliding bearings Impeller and rotor assembly Failure may present as performance degradation rather than complete breakdown. Early signs often include: ✔ Reduced flow rate ✔ Ab...

 What Happens When a CDLF Multistage Pump Operates Away from Its Design Point? CDLF vertical multistage pumps are widely used in water supply systems, boiler feed applications, industrial circulation, and pressure boosting. They are known for high head, compact structure, and stable performance. However, in real-world operation, many pumps do not run at their original design point for long periods of time. At first, everything seems normal. But long-term operation away from the design condition can gradually affect efficiency, stability, and service life. For technical specifications and models, visit: 👉 https://www.scpv.cn/pumps/CDL.html 1. What Does “Operating Away from Design Point” Mean? Every multistage pump has a Best Efficiency Point (BEP) defined by: Rated flow Rated head Optimal hydraulic balance When the actual operating flow is consistently lower or higher than this range, the pump is considered to be running off-design. This does not immediately cause failure — but it ...

 How Gear Oil Pumps Achieve Stable Delivery: Explained Through Meshing Volume Changes In industrial lubrication, hydraulic systems, and fluid circulation applications, gear oil pumps are widely chosen for their reliable delivery and long-term stability. But have you ever wondered what makes them so consistently effective? The key lies in something fundamental to their design: 👉 the predictable change of meshing volume between the gears. To explore available gear oil pump models and specifications, visit: https://www.scpv.cn/pumps/KCB.html 1. Gear Pumps Deliver Fluid Based on Meshing Volume Unlike centrifugal pumps that rely on kinetic energy to move fluid, a gear oil pump works on a positive displacement principle. Pressurized flow is generated by the repetitive change in internal volume as two gears rotate and mesh. Here’s how it works in each revolution: Suction: As the teeth of the driving and driven gears separate, the space between them expands, creating a low-pressure area t...

 How Do Different Flow Adjustment Methods Affect Metering Pump Accuracy? In dosing and chemical injection systems, the key value of a metering pump is accuracy, not simply capacity or speed. In practice, many dosing deviations are not caused by the pump itself, but by how the flow rate is adjusted. Different adjustment methods can lead to very different long-term accuracy results. 1. What Determines Metering Pump Accuracy? In principle, the output flow of a metering pump depends on two factors: Displacement per stroke Number of strokes per unit time Flow adjustment methods work by controlling one or both of these variables. The way this control is applied has a direct impact on dosing stability and repeatability. 2. Stroke Length Adjustment: More Stable at Low Flow Stroke length adjustment changes the effective displacement of each stroke. Main characteristics: Predictable volume per stroke Good repeatability Better performance at low dosing rates For applications with long-term, s...

 Magnetic Drive Pumps: What You Must Know Before Use Magnetic drive pumps are widely used in chemical, plating, pharmaceutical, and wastewater applications because they offer leak-free operation and high safety for corrosive and hazardous liquids. But good performance doesn’t come automatically — proper use and awareness of common issues are key. 👉 Learn more about magnetic drive pump options here: https://www.scpv.cn/cilibeng/ 🚀 Why Magnetic Drive Pumps Are Popular Magnetic drive pumps transfer torque from the motor to the pump’s internal rotor without a shaft seal. This eliminates a primary leakage path found in traditional pumps, making these pumps ideal for: ✔ Corrosive acids and alkalis ✔ Toxic or volatile fluids ✔ Closed, sealed systems ✔ Environments with strict safety or environmental requirements 🔍 Top 4 Things to Watch Out For Even though magnetic drive pumps are robust, several common pitfalls can affect performance or shorten service life: 1️⃣ Ensure the Pump Is Fill...