FluidTech News

 What Chain Reactions Can Occur When Magnetic Coupling Fails in a Magnetic Drive Pump? Magnetic drive pumps are widely used in chemical processing, pharmaceuticals, and other industries due to their sealless design and zero-leakage advantage. However, in real operation, a less obvious but critical issue may occur: 👉 magnetic coupling interruption (decoupling or slipping) In many cases, the pump appears to be running normally, but system performance starts to decline. This is not just a pump issue—it can trigger a series of chain reactions across the entire system. For more technical details, refer to: 👉 https://www.scpv.cn/news/877.html 1. What Is Magnetic Coupling Interruption? Magnetic drive pumps transmit torque through magnetic force: The motor drives the outer magnet assembly Magnetic force transfers torque to the inner magnet The inner magnet drives the impeller When conditions such as overload, high temperature, or increased resistance occur: 👉 The magnetic force may beco...

 Why Screw Pumps Should Never Run Dry: A Common Mistake That Damages Equipment In many industrial applications, screw pumps are widely used for their stable flow, low pulsation, and ability to handle high-viscosity fluids. However, a common mistake in daily operation often leads to performance decline or even equipment failure: 👉 running the pump dry Many users think running the pump for a short time without liquid is harmless. But in reality: 👉 dry running is one of the most damaging conditions for a screw pump 1. Why Screw Pumps Depend on Liquid A screw pump is a type of positive displacement pump. Its operation is based on: The rotation of the screw inside the stator Formation of sealed cavities to move fluid forward In this process, the fluid itself plays a critical role: 👉 it acts as both the working medium and the lubricant 2. What Happens During Dry Running? When there is no liquid inside the pump: The screw and stator come into direct contact Lubrication is lost Heat can...

 What Causes Screw Pump Seal Failure? Key Factors You Shouldn’t Ignore In industrial fluid handling, screw pumps are widely used for their stable flow, low pulsation, and strong ability to handle high-viscosity or particle-laden media. However, in real-world applications, one issue still shows up frequently: seal failure. From an engineering perspective, it’s fair to say that choosing the right pump is only half the job—whether the sealing system is reliable often determines how long the pump can run without trouble. So what actually causes screw pump seal failure? Here are the key factors. 1. Fluid Characteristics: The Most Overlooked Factor Many users focus on flow rate and pressure, but overlook how the fluid itself affects sealing performance. Typical risks include: High viscosity → increases friction and heat Solid particles → cause abrasion and scratches Corrosive media → attack sealing materials Crystallizing fluids → deposit around seal faces 👉 In many cases, seal failure ...

 Why does a magnetic drive pump feel “weaker” under high-temperature conditions? Many users notice this situation: the pump is still running, but the flow rate drops, and it feels like it can’t deliver enough power. The first reaction is often that the pump is failing—but that’s not always the case. The real issue is often related to the magnets. A magnetic drive pump relies on magnetic coupling. The motor drives the outer magnet, which transfers torque to the inner magnet through a magnetic field, and then drives the impeller. There is no direct mechanical contact, so once the magnetic force weakens, the pump’s performance drops. High temperature is one of the key factors affecting magnet performance. As temperature rises, the magnetic strength gradually decreases. This reduces the torque that can be transmitted, leading to lower flow rate and reduced efficiency. The pump is still running, but it’s no longer performing effectively. If the temperature exceeds a certain limit, irrev...

 Why Is Your Rotary Lobe Pump Getting Noisier? Common Causes Explained Rotary lobe pumps are widely used in industries such as food processing, pharmaceuticals, cosmetics, and fine chemicals due to their low shear, stable flow, and gentle handling of fluids. Under normal conditions, these pumps operate smoothly with low noise and minimal vibration. However, after a period of operation, some users begin to notice: 👉 Increased noise levels, abnormal sounds, or even vibration Many assume this is simply due to equipment aging. But in reality: 👉 Rising noise is often an early warning signal—not the root problem itself. For more technical insights and pump-related information, you can also refer to: 👉 https://www.scpv.cn/news/873.html 1. What Is “Normal” Sound for a Rotary Lobe Pump? A properly operating rotary lobe pump typically produces: Smooth and continuous sound Low-frequency hum Minimal vibration If you start hearing: Metallic scraping Intermittent knocking High-pitched noise ?...

 CDL Vertical Stainless Steel Multistage Pump: Impact of Internal Leakage on Overall Performance In water supply boosting, industrial circulation, and water treatment systems, the CDL vertical stainless steel multistage pump is widely used for its compact design, stable operation, and high efficiency. However, after long-term operation, a critical yet often overlooked issue emerges — internal leakage. It’s important to understand: 👉 Internal leakage is not a sudden failure, but the starting point of performance degradation. For product details and specifications, visit: 👉 https://www.scpv.cn/pumps/CDL.html 1. Why Internal Leakage Exists in Multistage Pumps Multistage pumps like CDL rely on multiple impellers to increase pressure step by step. Due to structural requirements, small clearances must exist between components: Impeller and diffuser Wear rings (clearance seals) Shaft sleeve and sealing areas These clearances are necessary for operation, but they also create natural leak...