FluidTech News

 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...

 Chemical Pump Flow Fluctuation: Common Causes and Analysis Chemical pumps are widely used in petrochemical, wastewater treatment, and process industries. During operation, unstable or fluctuating flow rate is one of the most common issues that can affect production efficiency, system stability, and equipment lifespan. This article summarizes the most common causes of chemical pump flow fluctuation and provides practical engineering insights for troubleshooting. For more chemical pump products and technical details, please visit: https://www.scpv.cn/huagongbeng/ 1. Operation Far from Best Efficiency Point (BEP) One of the primary reasons for flow instability is operating the pump far away from its Best Efficiency Point (BEP). When a centrifugal pump runs under low-flow or overload conditions: Internal recirculation increases Flow separation occurs Pressure and discharge become unstable This leads to periodic flow oscillation and unstable output. 2. Suction Side Problems (Air or Cav...

 Sewage Pump Flow Reduction: Is It a Pump Problem or a Piping System Issue? In municipal drainage, wastewater treatment, and industrial effluent transfer, sewage pumps are expected to deliver stable performance over long periods. However, a common issue observed on-site is: 👉 Flow rate gradually decreases while the pump is still running Many users immediately assume: 👉 “The pump efficiency has dropped—it needs repair or replacement” But in real engineering practice, a more common cause is: 👉 The piping system is restricting the pump performance 👉 Reference products and applications: https://www.scpv.cn/paiwubeng/ 1. Key point: flow reduction ≠ pump failure It’s a common misconception that: 👉 Flow rate = pump capability In reality: 👉 Flow rate = pump + system interaction Any change in system resistance will directly affect flow. 2. Cause #1: Pipeline blockage (most common) Sewage systems typically involve: High solids content Sediment accumulation Fibrous materials When pipeli...

ISG Pipeline Centrifugal Pump Bearing Overheating: Is It Always a Lubrication Problem? In HVAC circulation systems, water supply networks, and industrial fluid transport, ISG pipeline centrifugal pumps are widely used for their compact structure and stable operation. However, one common issue frequently observed on-site is: 👉 Bearing overheating during operation Many operators immediately assume: 👉 “It must be a lubrication issue” But real-world engineering experience shows that: 👉 Lubrication is only one of several possible causes 👉 Reference analysis: https://www.scpv.cn/news/880.html 1. First principle: why do bearings overheat? The root cause of bearing overheating is: 👉 Increased friction and abnormal load Lubrication affects friction—but it is not the only factor. 2. Lubrication issues (yes, but not the whole story) Typical lubrication-related causes include: Insufficient or excessive grease Degraded or contaminated lubricant Incorrect lubricant type These conditions can: 👉...

 Self-Priming Pump Flow Interruption: It’s Usually Not the Pump—But the System Behind It Self-priming pumps are widely used in municipal drainage, chemical transfer, and irrigation systems thanks to their ability to evacuate air and start without external priming. However, a common issue in real operations is: 👉 Flow suddenly stops during operation, or becomes intermittent Many users assume pump failure. In reality, most cases are caused by: 👉 Changes in system conditions, not the pump itself 👉 Reference analysis: https://www.scpv.cn/news/868.html 1. What “flow interruption” really means Typical symptoms include: Sudden loss of discharge Significant flow reduction Intermittent pumping behavior 👉 In essence: The pump fails to maintain a stable suction condition. 2. Cause #1: Air leakage on the suction side (most critical) Self-priming pumps are highly sensitive to air ingress. If there is: Loose pipe connections Worn gaskets Micro-leaks in suction piping It leads to: 👉 Air ente...

Screw Pump Seal Failure: It’s Usually Not the Seal—But the Operating Conditions Behind It In industries such as wastewater treatment, oil transfer, and chemical processing, screw pumps are widely used for their stable flow and ability to handle viscous media. However, a common issue many sites face is: 👉 Seal leakage after a period of operation Even after replacing the seal, the problem often returns quickly. 👉 Reference analysis: https://www.scpv.cn/news/874.html From real engineering experience, this is rarely a “seal quality issue.” More often, it is: 👉 Operating conditions continuously damaging the seal 1. Key point: seal failure is a result, not the root cause For a seal (mechanical seal or packing) to work properly, it requires: Proper lubrication Stable temperature Balanced pressure Consistent mechanical alignment If any of these conditions are compromised: 👉 Seal failure becomes inevitable 2. Cause #1: Dry running (most critical factor) When the pump operates under: Insuffi...