CDLF立式多級離心泵的應(yīng)用及功耗過大的原因分析
型號：CDLF；流量:1-22(m3/h)；流速:(l/s)；升力:6-232(米)；應(yīng)用領(lǐng)域:上海鈦龍CDLF立式多級離心泵采用先進(jìn)技術(shù)制造。上海龍亞泵閥生產(chǎn)的VAREM-CDLF系列不銹鋼立式多級離心泵是一種非自吸離心泵，由QDL(QDLF)改進(jìn)而來，優(yōu)化了機(jī)械密封結(jié)構(gòu)，采用了一套新穎的獨(dú)立結(jié)構(gòu)，可將自來水中的各種介質(zhì)輸送到工業(yè)液體中，適用于不同的溫度、流量和壓力范圍。它最大的優(yōu)點(diǎn)是先進(jìn)的水力模型設(shè)計(jì)，高效節(jié)能。水泵中的葉輪、泵殼及其主要附件均采用不銹鋼沖壓成型，流道非常通暢。軸瓦和軸套采用硬質(zhì)合金制成，使用壽命長，避免二次污染。軸封采用耐磨機(jī)械密封，無泄漏。電機(jī)采用Y2鉛殼，進(jìn)口軸承，絕緣等級:F級。泵運(yùn)行穩(wěn)定，噪音低，質(zhì)量可靠，外形美觀，體積小，重量輕，運(yùn)輸方便。是一種理想的綠色環(huán)保節(jié)能泵。CDLF立式多級離心泵的示范意義:CDLF立式多級離心泵的產(chǎn)品特點(diǎn):1 .CDLF立式多級離心泵采用優(yōu)良的水力模型和先進(jìn)的制造技術(shù)，大大提高了泵的性能和使用壽命。2.由于CDLF多級離心泵的軸封采用硬質(zhì)合金和氟橡膠制成，可以提高泵運(yùn)行的可靠性和輸送介質(zhì)的溫度。3.CDLF立式多級離心泵的溢流部分采用不銹鋼板沖壓焊接而成，適用于輕度腐蝕介質(zhì)。4.CDLF立式多級離心泵整體結(jié)構(gòu)緊湊、體積小、重量輕、噪音低、節(jié)能效果顯著、維修方便。5.CDLF立式多級離心泵的進(jìn)出口位于泵座的同一水平線上，可直接在管道中使用。6.ZILMET-CDLF多級離心泵采用標(biāo)準(zhǔn)電機(jī)，用戶可根據(jù)需要方便地配備電機(jī)。7.可根據(jù)用戶需要配備智能保護(hù)器，有效保護(hù)泵免于空轉(zhuǎn)、缺相和過載。CDLF立式多級離心泵的運(yùn)行條件:稀薄、清潔、不可燃、不含固體顆�；蚶w維的爆炸性液體。液體溫度:常溫型-15℃至+70℃；熱水型+70℃至+120℃；環(huán)境溫度:最高+40℃；海拔:最高1000米。CDLF立式多級離心泵的性能范圍:流量:1-22 m3/h；頭部:6-232米；功率:0.37-15kw；轉(zhuǎn)速:2900轉(zhuǎn)/分鐘；直徑:φ25-φ50；溫度范圍:-15℃-+120℃；CDLF立式多級離心泵的應(yīng)用:供水:水廠過濾輸送、水廠分區(qū)供水、主管加壓、高層建筑加壓。工業(yè)加壓:工藝水系統(tǒng)、清洗系統(tǒng)、高壓沖洗系統(tǒng)和消防系統(tǒng)。工業(yè)液體輸送:制冷空調(diào)系統(tǒng)、鍋爐給水及冷凝系統(tǒng)、機(jī)床配套、酸堿介質(zhì)輸送。水處理:超濾系統(tǒng)、反滲透系統(tǒng)、蒸餾系統(tǒng)、分離器、游泳池水處理系統(tǒng)。灌溉:農(nóng)田灌溉、噴灌、滴灌。CDLF立式多級離心泵型號譜:鈦龍CDLF立式多級離心泵安裝:1。CDLF立式不銹鋼多級離心泵應(yīng)垂直安裝在地面上，安裝時應(yīng)有足夠的冷空氣進(jìn)入電機(jī)冷卻風(fēng)扇。泵底部的箭頭指示通過泵的灌注方向。2.為了盡量減少泵可能產(chǎn)生的噪音，最好在泵的兩側(cè)以及基礎(chǔ)和泵體之間安裝防振夾具。對接法蘭、墊圈、螺栓和PJE池作為輔助零件提供，必須單獨(dú)訂購。當(dāng)需要清洗、修理或更換泵時，應(yīng)在泵的兩側(cè)安裝隔離閥，以防止系統(tǒng)排水。多級離心泵的安裝管道應(yīng)避免空氣堵塞，尤其是泵的吸入側(cè)。管道的安裝應(yīng)確保溫度變化引起的任何拉伸不會影響泵。如果泵安裝在長管道上，應(yīng)在圖紙的前后適當(dāng)支撐。3.如果多級離心泵有被石頭、樹葉、小樹枝等堵塞的危險(xiǎn)。應(yīng)該采取措施防止這種事情發(fā)生。將濾網(wǎng)安裝在吸入管上。4.在某些安裝情況下，排水管已經(jīng)被泵水平安裝或向下傾斜，因此泵中的水將會或必須定期流出，并且應(yīng)保護(hù)泵不使葉輪空轉(zhuǎn)。這種情況可以通過在泵附近安裝帶有真空閥的壞管來避免�；芈返淖罡唿c(diǎn)應(yīng)至少與泵電機(jī)的連接板齊平。這樣，排水管可以單獨(dú)從泵中排水，反之亦然。5.當(dāng)排水閥關(guān)閉時，禁止運(yùn)行泵，因?yàn)檫@會導(dǎo)致泵內(nèi)溫度升高/蒸汽形成，從而導(dǎo)致泵的損壞。如果排水室關(guān)閉時對泵的運(yùn)行有任何危險(xiǎn)，用旁通管或排水管將其連接到出口，以確保最小量的液體流過泵。例如，排水管可以連接到水箱。6.VAREM-CDL和CDLF輕型多級泵的最小數(shù)量。CDLF立式多級離心泵示例:典型高壓沖洗系統(tǒng)圖示例。如圖所示的這種安裝方法用于那些不能保證通過泵的“最小流量”的場合。1.輕型多級離心泵的流量開關(guān)會在流量太小時保護(hù)泵不被高熱損壞。2.在輸送微污染水的裝置中，安裝了輕型多級離心泵的過濾網(wǎng)，以保護(hù)液流開關(guān)。注:上述措施在液體流量穩(wěn)定、流量最小的裝置中是不必要的。在有水錘危險(xiǎn)的設(shè)備中，必須在泵的出口處安裝止回閥。不要使用快關(guān)閥，如快關(guān)噴槍，因?yàn)檫@種噴槍會造成水錘。影響電機(jī)與泵軸的連接，嚴(yán)重時泵軸會斷裂。CDLF立式多級離心泵的電氣連接:1。在打開接線盒蓋和移除任何泵部件之前，必須關(guān)閉電源。電氣連接必須由合格的電工按照當(dāng)?shù)胤ㄒ?guī)進(jìn)行。電機(jī)接線盒必須與電源開關(guān)正確連接。銘牌上標(biāo)明了工作電壓和頻率。注意所用電源應(yīng)適合電機(jī)。三相電機(jī)必須連接到僅具有保護(hù)功能的啟動器上。2.輕型多級離心泵的接線盒可依次轉(zhuǎn)90°，四個位置直停。必要時，使用螺絲刀拆下聯(lián)軸器護(hù)罩，但不要拆下聯(lián)軸器。擰下將電機(jī)固定到泵上的螺栓。將電機(jī)轉(zhuǎn)到所需位置。裝上螺栓并擰緊。重新安裝聯(lián)軸器護(hù)罩，使其垂直位于泵頭槽口的中心。電氣連接應(yīng)根據(jù)接線盒蓋中的接線圖進(jìn)行。注意:在輕型多級離心泵充滿液體之前，不要啟動它。CDLF立式多級離心泵啟動:1。當(dāng)輕型多級離心泵的液位高于泵入口處的閉式系統(tǒng)或開式系統(tǒng)時:1。關(guān)閉排水隔離閥，擰下泵頭上的排氣螺釘。2.請注意排氣口的方向，確保流出的水不會對人造成傷害或損壞電機(jī)或其他部件。在熱水裝置中，應(yīng)特別注意熱水造成的燙傷危險(xiǎn)。3.慢慢打開吸入管上的隔離閥，直到穩(wěn)定的氣流流出排氣閥。4.啟動輕型多級離心泵時，擰緊排氣螺釘并完全打開隔離閥。2.當(dāng)輕型多級離心泵的液位低于泵進(jìn)口開放系統(tǒng)時:1。啟動泵之前，吸入管和泵必須充滿液體并排空。2.CDL2，4(CDLF2，4，8，16) 3。關(guān)閉排水隔離閥。如圖7所示，逆著擋塊稍微轉(zhuǎn)動旁通閥。4.拆下加注塞，從加注口加注液體，直到吸入管和泵完全充滿液體，然后重新擰緊旁通閥。5.啟動輕型多級離心泵時，更換加注塞并擰緊。3.啟動輕型多級離心泵時檢查旋轉(zhuǎn)方向:1、在輕型多級離心泵充滿液體之前，不要啟動泵來檢查旋轉(zhuǎn)方向。2.檢查電機(jī)運(yùn)行方向時，不應(yīng)拆開聯(lián)軸器進(jìn)行檢查。因?yàn)椴鹣侣?lián)軸器時，需要調(diào)整軸的位置。正確的旋轉(zhuǎn)方向由泵頭或電機(jī)風(fēng)扇蓋上的箭頭指示。從風(fēng)扇上看，輕型多級離心泵應(yīng)該逆時針旋轉(zhuǎn)。4.輕型立式多級泵的啟動:1。啟動輕型多級離心泵前，泵吸入側(cè)的隔離閥應(yīng)完全打開，而排出側(cè)的隔離閥應(yīng)幾乎關(guān)閉。2.當(dāng)啟動輕型多級離心泵時，通過擰下泵頭上的排氣螺釘讓泵排氣，直到穩(wěn)定的液流從排氣孔流出，然后擰緊排氣螺釘。注意排氣孔的方向，確保流動的液體不會對人造成傷害或損壞電機(jī)或其他部件。在熱水裝置中，應(yīng)特別注意熱水造成的燙傷危險(xiǎn)。當(dāng)管道系統(tǒng)充滿液體時，慢慢打開隔離閥，直到完全打開。泵泵含空氣的液體時，最好定期排氣。要排空泵，請?jiān)诓僮鬟^程中松開泵頭上的排氣螺釘。CDLF立式多級離心泵的維護(hù)、啟停頻率:CDLF立式不銹鋼多級離心泵的維護(hù):1。在立式多級離心泵開始工作之前，必須查明泵沒有電源，泵不能突然啟動。2.輕型多級離心泵的軸承和軸封無需維護(hù)。如果長時間不需要排空泵，可以取下一個聯(lián)軸器保護(hù)板，在泵頭和聯(lián)軸器之間的軸上注入幾滴硅油。這樣，可以防止軸的密封面粘連。3.安裝聯(lián)軸器護(hù)罩時，注意它們在泵頭槽口中的垂直對準(zhǔn)。CDLF立式不銹鋼多級離心泵電機(jī)軸承:4。沒有潤滑噴嘴的電機(jī)不需要維護(hù)。帶潤滑噴嘴的電機(jī)應(yīng)使用高溫鋰基潤滑脂潤滑。5.如果ZILMET輕型多級離心泵長期懸掛，建議泵和電機(jī)一旦擱置，就進(jìn)行清洗和潤滑。6.當(dāng)泵在霜凍期間被擱置時，水應(yīng)該被排出以防止損壞和破裂。擰下泵頭上的排氣螺釘，取下底座上的放油塞，這樣就可以將泵排空。排水后，應(yīng)將卸載的零件重新安裝到位或妥善保管。上海鈦龍CDLF立式不銹鋼多級離心泵的啟停頻率:功率小于4KW的電機(jī)，啟動頻率不得超過每小時100次。其他電機(jī)的啟動速度不得超過每小時20次。上海龍亞泵閥品牌服務(wù)承諾:在質(zhì)量保證期內(nèi)對缺陷產(chǎn)品進(jìn)行修理、更換和退貨；所有質(zhì)量投訴應(yīng)在24小時內(nèi)得到答復(fù)。應(yīng)派遣服務(wù)人員離開現(xiàn)場，不排除故障或做出結(jié)論。本廠生產(chǎn)的配件均為原裝配件。我廠生產(chǎn)的產(chǎn)品及配件具有通用性，與原廠型號兼容。如有安裝尺寸和質(zhì)量問題，我們將無條件退換，所有設(shè)備終身服務(wù)！(整機(jī)保修一年，易損件除外)。全國各地區(qū)售后部門聯(lián)系方式:400-001-5655。
好了，以上是CDLF立式多級離心泵的應(yīng)用介紹。接下來，我們來談?wù)凜DLF泵功耗過大的幾個主要原因:
水泵耗電量過大的原因是什么？分析主要包括以下六點(diǎn):1)總揚(yáng)程與泵揚(yáng)程不匹配；2)介質(zhì)的密度和粘度與原設(shè)計(jì)不符；3)泵軸與原動機(jī)軸線不一致或彎曲；4)轉(zhuǎn)動部分和固定部分之間有摩擦；5)葉輪口環(huán)磨損；6)密封或機(jī)械密封安裝不當(dāng)。好了，以上是CDLF立式多級離心泵的應(yīng)用。更多介紹和價格請隨時聯(lián)系上海龍亞多級離心泵業(yè)務(wù)員。
Application of CDLF vertical multistage centrifugal pump and analysis of the reason for excessive power consumption
Model: CDLF; flow rate: 1-22 (m3/h); flow rate: (l/s); lift: 6-232 (m); application field: Shanghai titanon CDLF vertical multistage centrifugal pump is manufactured by advanced technology. The varm CDLF series stainless steel vertical multistage centrifugal pump produced by Shanghai Longya pump valve is a non self-priming centrifugal pump. It is improved by QDL (qdlf), and the mechanical seal structure is optimized. A new independent structure is adopted, which can transfer all kinds of media in tap water to industrial liquid body, which is suitable for different temperature, flow and pressure range. Its biggest advantage is advanced hydraulic model design, high efficiency and energy saving. The impeller, casing and main accessories in the pump are all made of stainless steel, and the flow path is very smooth. The bearing shells and sleeves are made of cemented carbide, which has a long service life and avoids secondary pollution. The shaft seal is wear-resistant mechanical seal, without leakage. Y2 lead shell, imported bearing, insulation grade F is adopted for the motor. The pump is stable in operation, low in noise, reliable in quality, beautiful in appearance, small in volume, light in weight and convenient in transportation. It is an ideal green and environmental protection energy-saving pump. The demonstration significance of CDLF vertical multistage centrifugal pump: the product characteristics of CDLF vertical multistage centrifugal pump: 1. The CDLF vertical multistage centrifugal pump adopts excellent hydraulic model and advanced manufacturing technology, which greatly improves the performance and service life of the pump. 2. because the shaft seal of CDLF multistage centrifugal pump is made of cemented carbide and fluororubber, the reliability of pump operation and the temperature of the conveying medium can be improved. 3. The overflow part of CDLF vertical multistage centrifugal pump is made of stainless steel plate stamping welding, which is suitable for mild corrosion medium. 4. The CDLF vertical multistage centrifugal pump has compact structure, small volume, light weight, low noise, remarkable energy saving effect and convenient maintenance. 5. The inlet and outlet of CDLF centrifugal pump is located on the same horizontal line of pump base, and can be directly used in the pipeline. 6. Zilmet CDLF multi-stage centrifugal pump adopts standard motor, and the user can easily equip the motor according to the needs. 7. intelligent protector can be equipped according to the needs of users, effectively protecting the pump from idling, phase shortage and overload. The operation conditions of CDLF vertical multistage centrifugal pump: thin, clean, non combustible, explosive liquid without solid particles or fibers. Liquid temperature: normal temperature type - 15 ℃ to +70 ℃; hot water type +70 ℃ to +120 ℃; environment temperature: maximum +40 ℃; altitude: up to 1000m. The performance range of CDLF vertical multistage centrifugal pump: flow: 1-22 m3/h; head: 6-232 m; power: 0.37-15kw; speed: 2900 rpm; diameter: φ 25- φ 50; temperature range: 15 ℃ - +120 ℃; application of CDLF vertical multistage centrifugal pump: water supply: water plant filtration and transportation, water plant partition water supply, main pipe pressure, high-rise building pressure. Industrial pressure: process water system, cleaning system, high pressure flushing system and fire fighting system. Industrial liquid transportation: refrigeration air conditioning system, boiler water supply and condensation system, machine tool supporting, acid-base medium transportation. Water treatment: ultrafiltration system, reverse osmosis system, distillation system, separator, swimming pool water treatment system. Irrigation: farmland irrigation, spray irrigation, drip irrigation. Model spectrum of CDLF vertical multistage centrifugal pump: installation of vertical multi-stage centrifugal pump of illon CDLF: 1. CDLF vertical stainless steel multistage centrifugal pump shall be installed vertically on the ground, and enough cold air shall be installed to enter the motor cooling fan. The arrow at the bottom of the pump indicates the direction of filling through the pump. 2. in order to minimize the noise that may be generated by the pump, it is better to install anti vibration clamps on both sides of the pump and between the foundation and the pump body. Butt flange, washer, bolt and pje pool are supplied as auxiliary parts and must be ordered separately. When cleaning, repairing or replacing the pump is required, isolation valves shall be installed on both sides of the pump to prevent drainage of the system. The installation pipeline of multistage centrifugal pump shall avoid air blockage, especially on the suction side of the pump. The piping shall be installed so that any tension caused by temperature changes does not affect the pump. If the pump is installed on long pipes, it shall be properly supported at the front and back of the drawings. 3. if the multistage centrifugal pump is blocked by stones, leaves, twigs and other trees. Measures should be taken to prevent such things from happening. Install the screen on the suction pipe. 4. in some installation cases, the drain pipe has been installed horizontally or tilted downward by the pump, so the water in the pump will or must flow out regularly, and the pump shall be protected from idling the impeller. This can be avoided by installing a bad pipe with a vacuum valve near the pump. The highest point of the circuit shall be at least flush with the connecting plate of the pump motor. In this way, the drain can be drained from the pump alone and vice versa. 5. when the drain valve is closed, it is forbidden to operate the pump because it will cause temperature rise / steam formation in the pump, which will cause damage to the pump. If there is any danger to the operation of the pump when the drain chamber is closed, connect it to the outlet with a bypass or drain to ensure that the minimum amount of liquid flows through the pump. For example, the drain can be connected to the water tank. 6. minimum number of Walem CDL and CDLF light multistage pumps. Example of CDLF vertical multistage centrifugal pump: typical high pressure flushing system diagram example. This installation method shown in the figure is used in cases where "minimum flow" through the pump cannot be guaranteed. 1. the flow switch of light multistage centrifugal pump will protect the pump from high heat damage when the flow is too small. 2. in the device of transporting slightly polluted water, a filter screen of light multistage centrifugal pump is installed to protect the liquid flow switch. Note: the above measures are unnecessary in the device with stable liquid flow and minimum flow. In equipment with water hammer danger, check valve must be installed at the outlet of pump. Do not use quick closing valves, such as quick closing of the gun, as this spray gun will cause water hammer. The connection between motor and pump shaft is affected, and the pump shaft will break when serious. Electrical connection of CDLF vertical multistage centrifugal pump: 1. The power must be turned off before opening the terminal box cover and removing any pump components. Electrical connections must be made by qualified electricians in accordance with local regulations. The motor junction box must be connected correctly to the power switch. The working voltage and frequency are indicated on the nameplate. Note that the power supply used shall be suitable for the motor. The three-phase motor must be connected to the starter with protection only. 2. the junction box of light multi-stage centrifugal pump can turn 90 ° in turn and stop at four positions. If necessary, use a screwdriver to remove the coupling guard, but do not remove the coupling. Remove the bolts that secure the motor to the pump. Turn the motor to the desired position. Install the bolts and tighten them. Refit the coupling guard so that it is perpendicular to the center of the pump head notch. Electrical connections shall be made according to the wiring diagrams in the terminal box cover. Note: do not start a light multistage centrifugal pump until it is filled with liquid. CDLF vertical multistage centrifugal pump start: 1. When the liquid level of light multistage centrifugal pump is higher than that of closed system or open system at the pump inlet: 1. Close the drain isolation valve and screw off the exhaust screw on the pump head. 2. please pay attention to the direction of exhaust port, and ensure that the water flowing out will not harm or damage the motor or other parts. In hot water installation, special attention should be paid to the scald risk caused by hot water. 3. slowly open the isolation valve on the suction pipe until the stable air flow flows out of the exhaust valve. 4. when starting the light multistage centrifugal pump, tighten the exhaust screw and fully open the isolation valve. 2. when the liquid level of light multistage centrifugal pump is lower than that of the pump inlet open system: 1. Before starting the pump, the suction pipes and pumps must be filled with liquid and drained. 2.CDL2，4(CDLF2，4，8，16) 3。 Close the drain isolation valve. As shown in Figure 7, turn the bypass valve slightly against the stop. 4. remove the filler plug, fill the liquid from the filler until the suction pipe and pump are fully filled with liquid, and then retighten the bypass valve. 5. when starting the light multi-stage centrifugal pump, replace the filling plug and tighten it. 3. check the rotation direction when starting the light multistage centrifugal pump: 1. Do not start the pump to check the direction of rotation until the light multistage centrifugal pump is filled with liquid. 2. when checking the motor running direction, the coupling shall not be disassembled for inspection. Because when the coupling is removed, the position of the shaft needs to be adjusted. The correct direction of rotation is indicated by the arrow on the pump head or motor fan cover. From the fan, the light multistage centrifugal pump should be turned counter clockwise. 4. start of light vertical multistage pump: 1. Before starting the light multistage centrifugal pump, the isolation valve on the suction side of the pump shall be fully opened, and the isolation valve on the discharge side shall be almost closed. 2. when starting the light multistage centrifugal pump, the pump shall be discharged by unscrewing the exhaust screw on the pump head until the stable liquid flow flows out of the exhaust hole, and then tighten the exhaust screw. Pay attention to the direction of the exhaust hole to ensure that the flowing liquid will not harm or damage the motor or other parts to the person. In hot water installation, special attention should be paid to the scald risk caused by hot water. When the piping system is filled with liquid, slowly open the isolation valve until it is fully open. When the pump contains air liquid, it is better to exhaust regularly. To drain the pump, loosen the exhaust screw on the pump head during operation. Maintenance and start-up frequency of CDLF vertical multistage centrifugal pump: maintenance of CDLF vertical stainless steel multistage centrifugal pump: 1. Before the vertical multistage centrifugal pump starts to work, it must be found that the pump has no power supply and the pump cannot start suddenly. 2. the bearing and shaft seal of light multi-stage centrifugal pump need not be maintained. If the pump does not need to be drained for a long time, a coupling protection plate can be removed and a few drops of silicone oil can be injected into the shaft between the pump head and the coupling. This prevents the sealing surface of the shaft from sticking. 3. when installing coupling guard, pay attention to their vertical alignment in the pump head slot. Motor bearing of CDLF vertical stainless steel multistage centrifugal pump: 4. Motors without lubrication nozzles do not need maintenance. Motors with lubricating nozzles shall be lubricated with high temperature lithium grease. 5. if zilmet light multi-stage centrifugal pump is suspended for a long time, it is recommended that the pump and motor should be cleaned and lubricated once they are put into use. 6. when the pump is put in use during frost, water should be discharged to prevent damage and rupture. Remove the drain plug on the base by unscrewing the exhaust screw on the pump head, so that the pump can be drained. After drainage, the unloaded parts shall be reinstalled in place or properly kept. Start and stop frequency of Shanghai titanon CDLF vertical stainless steel multistage centrifugal pump: motor with power less than 4kw, and starting frequency shall not exceed 100 times per hour. Other motors shall not be started at a speed of more than 20 times per hour. Shanghai Longya pump valve brand service commitment: repair, replace and return the defective products within the warranty period; all quality complaints should be answered within 24 hours. Service personnel shall be dispatched to leave the site without troubleshooting or making conclusions. The accessories produced by our factory are original ones. Our products and accessories are universal and compatible with the original model. If there are installation size and quality problems, we will return unconditionally, all equipment life-long service! (the whole machine is guaranteed for one year, except for wearing parts). Contact information of after sales departments in various regions of the country: 400-001-5655.
Well, the above is the introduction of the application of CDLF vertical multistage centrifugal pump. Next, let's talk about several main reasons for the excessive power consumption of CDLF pump:
What is the reason why the water pump consumes too much electricity? The analysis mainly includes the following six points: 1) the total head does not match the pump head; 2) the density and viscosity of the medium are inconsistent with the original design; 3) the pump shaft is inconsistent with or bent with the original motor axis; 4) friction exists between the rotating part and the fixed part; 5) the impeller mouth ring is worn; 6) the seal or mechanical seal is not installed properly. OK, the above is the application of CDLF vertical multistage centrifugal pump. Please contact Shanghai Longya multi-stage centrifugal pump operator for more introduction and price.