Double-Suction Pump for Seawater Desalination and Reverse Osmosis Plants

Product DescriptionEco-friendlyThe traditional grease-lubricated bearings (including both rolling contact bearings and sliding contact bearings) are replaced with self-lubricating sliding contact bearings, eliminating the pollution hazard to both the transmission medium and the site environment.   Energy-savingLubricant is no longer neededLess material used:Traditional bearing body removedShorter pump shaft - reduce one mechanical sealIncreased efficiency:Hydraulic model improved and optimisedChanges in structure and lubrication methods improve efficiency Maintenance-free and low operation cost Maintenance-free bearing eliminates manual inspectionThe non-driving end seal adopts static seal technique,eliminating one mechanical sealLonger bearing lifeThe service life of traditional ball bearings is affected by the operating conditions. The general design life is about 2-5 years. With this product, the bearing service life can reach 5-10 years.Safer, smoother, and more reliable operationCarefully designed to reduce vibration and noise.The non-driving end adopts static sealing, which reduces one point of failure.The bearing cage of the traditional double-suction pump is removed, the length of the pump shaft is shortened, improving the operational stability of the pump.Diaphragm coupling for the full range of pumps.Wider applicationA variety of material combinations can be chosen according to different purposes, allowing for a wider range of application.Simpler structure, easier repairThe original advantages remaining unchanged - the casing is split into two parts. Inspection work only needs tlhe upper casing to be dismounted, instead of the main distribution piping.Inlet diameter(mm)Φ150 ~ φ500φ600 ~ φ1200Frequency(Hz)50605060Flow (m3/min)5~406~5040~20045~250Head(m)5~1308~18010~12015~180Pump stage High speed 2,42,46,8,10,126,8,10,12Low speed 4,64,68,10,12,148,10,12,14   Standard specification Special specification Extraction medium Clear water, industrial water, river water Sea water, paper pulp liquid (water-like), organic liquid fertilizer, medium with impurities Medium temperaturesBelow 80ºC80ºC~300ºCShaft sealStatic seal/Mechanical sealStatic seal/Mechanical sealBearing and lubricantMaintenance-freewater-based lubricantSpecial maintenance-free self-lubricatingRotating directionClockwise(From the prime mover) CWAnti-clockwiseCCWImport and export flangeGBJIS. ANSI. API. JPI etc.Inlet & outlet directionHorizontal inlet,horizontal outletAs per customer requirementsDrive methodElectric motors, internal combustion engines, steam turbines, etc.Electric motors, internal combustion engines, steam turbines, etc.Detailed Photos Corrosion resistant alloy ComponentStandard specificationSpecial specificationPump casing & Casing coverGrey iron/ Ductile ironStainless steel/Corrosion-resistant stainless steelImpellerGrey iron/Cast steel/Stainless steelCorrosion-resistant stainless steel/BronzeShaftCarbon steelStainless steel/Corrosion-resistant stainless steelBearingMaintenance-free water-based lubricant Special maintenance-free self-lubricating Seal ring Carbon steel/Copper Grey iron/Stainless steel/Corrosion-resistant stainless steel  Product FeaturePump casing & Casing coverThe pressure chamber of ES type double suction pump has a trapezoidal cross-section. To avoid shape distortion due to casting errors, the flange of the casing cover is designed to be slightly larger than the flange of the casing. For a split casing pump with a lower head, a single-shell structure is used. To reduce the pressure pulsation during the operation, the diaphragm tongue of the pump pressure chamber is designed with an inclined shape. For a split casing pump with a higher head, the radial force generated when the pump is running is large. Hence a double volute chamber structure is adopted.ImpellerThe impeller of ES type double-suction pump adopts a structure in which two identical single-suction blades are placed back-to-back. The structure is symmetrical, the liquid flows into the impeller symmetrically from the suction chamber, and the generated axial forces cancel each other out. The runner of the impeller is polished and smoothed by tools like grinding wheels. The thickness of the impeller blades is uniform, and they are polished very thinly at the inlet. The inlet of the blades take the shape of a circular arc, which improves the anti-cavitation performance of the pump.Seal ring and Impeller seal ringThe sealing ring of ES double suction pump is designed to protect the pump casing and cover. In order to prevent the sealing ring from rotating when the pump is running, it needs to be fixed with a dowel pin. To facilitate installation, the positioning groove of the pin is provided on the middle opening surface of the casing cover or the pump casing.Similarly, the impeller sealing ring is a part designed to protect the impeller. When the pumped medium contains solid particles, or, the material of the impeller and the seal ring are the same (