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What should be done when a pump is idling? Causes of idling in centrifugal pumps: The medium at the inlet of the pump is insufficient or the inlet pressure is too low, or the inlet pipeline of the pump is blocked, or the air in the pump chamber has not been completely discharged. Hazards When a centrifugal pump is idling, the impeller does not contact or contacts very little with the medium, and cannot work effectively. The liquid cannot be transported normally, which is all doing useless work. Since there is no effective work being done, the load on the motor is very small, and the generated current is also small, so there is no significant impact on the motor. However, idling has a fatal impact on the pump. An idling pump is prone to cavitation, causing damage to the pump body and flow-through components; Whether it is a mechanical seal or a packing seal form for an idling pump, without the lubrication of the liquid, dry grinding will occur, resulting in rapid damage; The rotor components and pump body of an idling pump will heat up. Without the cooling effect of the liquid, due to thermal expansion and contraction, those narrow clearance positions (such as the sealing ring) are very likely to seize; For a multi-stage centrifugal pump that is idling, the balance disc has no lubrication from the liquid, and the balance disc will soon be burned out and damaged. Prevention and Recommendations 01 Clearance Treatment Treat each clearance position of the centrifugal pump. Expand it under permissible conditions to prevent seizing; 02 Pump Shaft Treatment Perform special processes such as quenching and tempering, heat treatment, etc. on the shaft of the centrifugal pump to increase its hardness. Use materials with low flexibility to prevent significant swinging and seizing during idling; 03 Seal Treatment Use a mechanical seal or packing cavity that does not rely on liquid medium for lubrication; 04 Bearing Treatment Select a sealed, self-lubricating bearing that does not require oiling. Recommendations The pump chamber of a horizontal self-priming centrifugal pump has a relatively larger volume space compared to other centrifugal pumps, and there is a position that can store water. Before the normal operation of the self-priming centrifugal pump, the chamber should be filled with liquid. During the startup phase, there is a period of self-priming time during which air is continuously discharged out of the pump body. This period belongs to partial idling. Set up an idling sensing system. Use modern equipment to monitor the water pump in real-time. When the centrifugal pump idles, immediately sound an alarm and automatically shut down to protect the safety of the unit.
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TZAF petrochemical process fluorine-lined centrifugal pump adopts standard pipelines designed according to API610 specifications. It is suitable for long-term transportation of various corrosive media such as strong acids, alkalis, salts, strong oxidants, etc. It has the characteristics of strong corrosion resistance, good wear resistance, high mechanical strength, no aging, and no toxin decomposition. The pump has the advantages of corrosion resistance, wear resistance, high temperature resistance, stable operation, advanced and reasonable structure, strict and reliable sealing performance, convenient disassembly and maintenance, and long service life. This pump is suitable for conveying corrosive liquids in oil refineries, petrochemical industry coal processing projects, cryogenic projects, papermaking, sugar industry, water supply plants, seawater desalination plants, power plants, environmental protection projects and shipping industries, especially for conveying strong acids and alkalis, organic solvents and precious liquids. Diameter: 25~300mm, flow rate: 5.5~2600m³/h, head: 16~200m, Working pressure: 2.5 MPa Working temperature: -30℃～ +180℃ Note: When the medium specific gravity is greater than 1.3mg/cm3, it should be stated when ordering, and idling is prohibited.
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TCZW Series Magnetic Axial Flow PumpOur company has upgraded the existing THZW axial flow pump by incorporating a magnetic drive system, replacing mechanical seals with magnetic seals to achieve zero leakage. Key Features Pioneering Design: Fills the gap in large-flow, low-head magnetic chemical pumps, with a maximum flow rate of 1,200 m³/h (4,000 ft³/min). Optimized Magnetic Circuit: Precisely designed magnetic circuits and reduced cantilever length compared to conventional axial flow pumps, minimizing floor space requirements. Enhanced Stability: Dual friction pairs and double-end support structure ensure stable operation. Corrosion & Abrasion Resistance: Flow passages made of wear-resistant and corrosion-resistant materials handle media with solid content ≤5% and particle size <0.1 mm. Leakage-Free Operation: Static seals replace traditional mechanical seals, solving leakage issues in transporting hazardous, flammable, or valuable fluids. Product Overview ApplicationsWidely used in industries such as: Petroleum & Petrochemicals Alkali Production Metallurgy & Rare Earths Pesticides & Dyes Pharmaceuticals & Electronics Papermaking, Electroplating, and more. Performance Specifications Design Pressure: 1.6 MPa (232 psi) Flow Rate: Up to 18,000 m³/h (67,000 ft³/min) Head: Up to 4 m (13 ft) Pipe Diameter: Up to 1,200 mm (47 in) Power Range: 1.1–400 kW Operating Temperature Standard: **-20°C to 200°C** (-4°F to 392°F) Extended Range (with dual-end seal cooling): Up to 300°C (572°F) Important Notes Notify us if the medium density exceeds 1.3 g/cm³ (specific gravity >1.3). Prohibited Operations: Dry running or transporting particulate/crystallizing media.
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The rise of every power comes from constant concentration Product determines the potential of an enterprise. "Planet Shengtang" adheres to independent research and development, and has produced more than 50 products such as TIC, TCA, THJS, THJ and series, which have been widely used in the safe transportation of corrosive industry fluids in chlor-alkali, chemical industry, pharmaceutical, agricultural chemical, fine chemical and other major fields.
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When the thermal conductivity of a graphite condenser declines, maintenance should be performed promptly. If severe scaling occurs, appropriate chemical cleaning methods can be used. For internal crystal blockages, heating and melting can be applied for cleaning, but mechanical equipment should not be used. Cleaning tools such as shovels, laser cutters, soft brushes, compressed air, and high-pressure steam can be employed. In cases of severe scaling or complete blockage, a tube-flushing drill can be utilized. For chemical descaling, a chemical analysis of the scaling substances in the graphite condenser must first be conducted to determine the appropriate cleaning solvent. Sulfate and silicate scales are typically treated with alkaline solutions, while carbonate scales are treated with acid solutions. Sodium carbonate and sodium hydroxide can be used for tar-like scales. Detergents and cleaning agents can be mixed with water in specific proportions for cleaning. When opting for chemical cleaning, it is essential to consider the use of corrosion inhibitors. After chemical cleaning, rinse with clean water multiple times until the water runs clear. In addition to the above methods, a sponge ball automatic cleaning system can also be employed. For more information about graphite condensers or graphite heat exchangers, feel free to follow Anhui Shengshi Datang Chemical Equipment Group.
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Shengtang Road, Maolin Town, Jingxian City, Anhui Province, China (factory)
Acid and alkali resistant chemical pump and intelligent filtration system integrated supplier
IPv6 network supported