pump application

  Flange interface leakage   Cause: This is typically caused by excessive strain on the fastening screws.   Solution: Tighten the screws diagonally, not all at once. Ideally, the gasket between the two flanges should be the same size as the flanges.     The motor is running but no water is being pumped out.   Check the motor's direction of rotation   Cause: The motor may be running in the wrong direction, or there may be air leaks at the inlet.   Solution: Check the motor's direction of rotation and check for air leaks at the inlet.     Mechanical seal leakage   The mechanical seal is burned due to dry pumping without water   Possible cause for new pumps: Dry running without water may damage the shaft seal. For older pumps, there are several possible causes:   1. Wear on the dynamic and static seal surfaces   Cause 1: Overtightening. Observe the dynamic and static seal surfaces. If there is severe burning, blackening, or deep marks, or if the sealing rubber has hardened and lost its elasticity, this is due to overtightening.   Cause 2: Too loose installation. Observe the surfaces of the dynamic and static seal rings. A thin layer of scale can be wiped off, and the surfaces are largely unworn. This is caused by a loss of spring elasticity, improper assembly, or axial movement of the motor.   Cause 3: Poor water quality containing particles. Poor water quality, containing small particles and a high hydrochloric acid content in the medium, can cause abrasive wear on the seal surfaces or strain, creating grooves and annular grooves.   Cause 4: Dry wear damage caused by water shortage. This phenomenon is often seen in bottom-valve installations with negative inlet pressure, air in the water inlet pipe, and air in the pump cavity. After the pump is started, the friction of the seal at high speed generates high temperatures, preventing cooling. Check the seal to see if the spring tension is normal, the friction surface is charred and blackened, and the rubber is hardened and cracked.   Cause 5: Cavitation. Cavitation primarily occurs in hot water pumps. Because the medium is hot water, the high water temperature generates steam. Steam in the pipes enters the high areas of the pump chamber, where it cannot be expelled. This causes water shortages, dry wear of the mechanical seal, and cavitation. An automatic exhaust valve must be installed and the mechanical seal replaced.   Cause 6: Assembly issues. The pump cover may not be installed level, causing the shaft and cover to be misaligned, resulting in misalignment of the moving and static surfaces. Short operation can lead to wear on one side and water leakage. It's also possible that the rubber components or surfaces of the moving and static rings may be damaged during installation.   2. Mechanical sealant failure   Causes of mechanical sealant failure: Aging and deformation of rubber components, primarily in hot water pumps. Symptoms of mechanical sealant failure include excessively high water temperatures, which dissolve the rubber. Visually, the rubber surface appears loose and rough, losing its elasticity, leading to failure.   3. Causes of failure in the static ring chamber of the pump cover   The primary cause is large dimensional errors in the machining of the inner bore of the static ring chamber, resulting in a rough surface. Symptoms include water spraying from the axial direction, a gap between the stationary ring and the inner bore, or a rough inner bore, causing the stationary ring to rotate with it and rubber wear.   4. Poor machining precision, undersized, rough, or rusty motor journals   The motor journal (where the rotating ring rests) may be undersized, or the pump may be corroded by corrosive media, or due to prolonged downtime, with water acting as the medium. The electrode potential difference between the steel shaft and the cast impeller and pump cover creates a galvanic reaction, leading to journal corrosion. Symptoms include spotty corrosion on the surface.

  On the beautiful Weishan Lake, there is one of China's largest drainage pump companies.   Its products are explosion-proof, wear-resistant, high-lift and high-temperature resistant, and are widely used in drainage of various coal mines, gold mines, iron mines, and other mines. And drainage of tunnels and construction projects. It not only has coal safety certification, but also has ordinary explosion-proof certifications of EXDIIBT4 and EXDIICT4. Its motors are all equipped with H-class insulation as standard, so it can transport 60-degree high-temperature media. Its standard overcurrent material is ductile iron, which is more wear-resistant than cast iron. It can also use more wear-resistant high-chromium iron and duplex steel impellers. Depending on the different lifts of the water pump, you can also choose a multi-stage impeller drainage pump. The maximum lift of the submersible drainage pump can reach 800 meters, and the maximum lift of the emergency forced drainage pump can reach 1700 meters.   Unlike most pump companies whose castings come from outsourcing, it has two automated casting production lines. Its components are all processed by automated machine tools, which not only improves efficiency but also improves quality. After assembly, each water pump will undergo rigorous testing, so there is strict quality control from components to the whole machine.

  Mechanical diaphragm metering pump Application areas: widely used in environmental protection, municipal administration, pharmaceuticals, food, sewage treatment and scientific research and other industries, transporting various chemical agents. Material: stainless steel, fluoroplastics, other materials Product description: The mechanical diaphragm metering pump adopts a reliable double cam structure, suitable for a variety of harsh working conditions, low noise, simple disassembly, convenient maintenance, oil bath lubrication, and long service life of the drive components.   Performance and advantages: Mechanical drive diaphragm, the diaphragm adopts a multi-layer composite structure of ptfe and elastic rubber, with no leakage and durable. There is no diaphragm guard on the material side to facilitate the passage of materials PVC, PVDF, 316SS and other pump head materials are optional, suitable for various materials Self-cleaning check valve structure Flow regulation can be achieved in shutdown or running state High-precision worm gear and worm technology runs smoothly   Core 3 major advantages Pure copper core motor is durable (reliable performance) High-quality pump body (excellent quality) Specialized diaphragm (durable and practical)   Various pump head options Various materials to meet more requirements