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SD/SDF/SDY/SMD horizontal multistage pump

This series of horizontal multi-stage pumps adopt the high-efficiency and energy-saving hydraulic model recommend used by the country. It has the advantages of high efficiency and energy saving, wide performance range, safe and stable operation, low noise, long life, convenient installation and maintenance, etc. By changing the material of the pump (or the material of the pump flow part), sealing form and increasing the cooling system, hot water, oil, corrosive and material-containing media can be transported.

Keyword:

SDL/SCDL 立式多级泵

Classification:

  • Description
  • Application
  • Main Projects
  • Technical Drawing
  • Product Video
  • Product overview

    This series of pump is a segmental multi-stage centrifugal pump, which adopts the high-efficiency and energy-saving hydraulic model recommend used by the state. It has the advantages of high efficiency and energy saving, wide performance range, safe and stable operation, low noise, long life, convenient installation and maintenance, etc.;By changing the material of the pump(or pump flow part material), sealing form and increase the cooling system, can transport hot water, oil, corrosive and containing material medium.

    SDType pump for conveying does not contain solid particles, the temperature is not higher80℃The clear water or the physical and chemical properties are similar to the clear water liquid, which is suitable for the use of mines and urban water supply and drainage projects.

    SDGType pump for conveying does not contain solid particles, the temperature is not higher105℃Clear water or a liquid with physical and chemical properties similar to clear water, used for boiler feed water or transportation of hot water or similar hot water media.

    SMDType pump for conveying solid particles content is not more1.5%of neutral mineral water(particle size is less0.5mm)And other similar sewage, the temperature of the transported medium is not higher80℃Suitable for steel plant, mine drainage, sewage transportation and other occasions.

    SDFThe delivery temperature of the type pump is-20 ℃ ~ 105 ℃Does not contain solid particles, corrosive liquid.

             SDYType pump is used for conveying without solid particles, the temperature is-20 ℃ ~ 150 ℃, the viscosity is less120centistokes of oils and petroleum products. The allowable inlet pressure of the above pumps shall not exceed0.6MPa。

    Model meaning

    Structure Description

    SD、SDG、SMD、SDF、SDYThe pump is mainly composed of four parts: fixed part, rotor part, bearing and shaft seal:

    1,Fixed part:It is mainly composed of suction section, middle section, discharge section and guide vane, etc., and each section is tightened with a bar to form a working room.DThe suction inlet of the type pump is in the horizontal direction, and the outlet is vertically upward.;DGThe outlet and inlet of the pump are both vertically upward;MD,DF,DYThe outlet of the pump is vertically upward, and the inlet is generally horizontal. The inlet and outlet can also be produced vertically upward according to needs.

    2Rotor part:It is mainly composed of shaft, impeller, balance plate and shaft sleeve. The shaft transmits power to the impeller to make it work;Balance disc for balancing axial force;The shaft is fitted with a replaceable shaft sleeve to protect the shaft.

    3Bearing part:It is mainly composed of bearing body, bearing and bearing gland. Except85-67,155-67,600-60The type pump adopts sliding bearing and thin oil lubrication, while the other type pumps adopt rolling bearing and dry oil lubrication.

    4Shaft seal:Generally, soft packing is used for sealing, which is mainly composed of sealing box, packing and water retaining ring on water inlet section and tail cover. Sealing cavity into a certain pressure of water, water seal, water cooling and water lubrication. SDType pump water seal water generally comes from the pressure water in the pump, SDG、SMD、SDF、SDYThe type pump comes from the pressure water in the pump or from an external water supply.DG,MD,DF,DYType pump more use of mechanical seal.

    Drive:The pump is directly driven by the prime mover through an elastic coupling. Looking at the pump from the prime mover end, the pump rotates clockwise.

    Maximum suction height

    When users use, should consider the impact of various factors on the use of the maximum suction height H should be lower than the following calculation value (negative value should be backward), otherwise the pump will not work properly.
    H = Pbx10.2-NPSHr-Hf-Hv-HSPb = local atmospheric pressure bar (sea level 1bar)Hf = water inlet line loss m
    NPSHr = required NPSH m , Hv = liquid saturated vapor pressure m (converted to water column height)
    Hs = safety margin m (generally 0.5m) example: atmospheric pressure Pb = 1bar, pump cavitation margin NPSHr = 2m, pipeline loss Hf = 2m, safety margin Hs = 0.5m, saturated vapor pressure Hv = Pv/pg = 0.7m (converted into water column height) H = 1x10.2-2-2-0.7-0.5=5m at liquid temperature of 40 ℃


    Main Parts Selection Material List

    SD/SMD/Pump main parts selection material list
    Name SD/SDGtype pump SMDtype pump SD/SMDtype pump SDG/SDYtype pump
    Suction section HT200 HT200 ZG270-500 ZG270-500
    Spit out section HT250 QT500-7 ZG310-570 ZG310-570
    Middle section HT250 HT250 ZG310-570 ZG310-570
    Guide vane HT200 QT500-7 ZG270-500 ZG270-500
    Impeller HT200 QT500-7 ZG230-450 ZG230-450
    Shaft 40Cr 40Cr 40Cr 40Cr
    Shaft seal Packing seal Packing seal Packing seal Packing seal
    Balance disc Standard:2Cr13High with quenching optional:2Cr13 nickel base alloy
    balance ring Standard:3Cr13High with quenching optional:3Cr13 nickel base alloy
    Remarks Suitable for single-stage head <80m Suitable for single-stage lift≥ 80m

     

    SDFPump main parts selection material list
    Material Category
    Main parts Slight corrosion resistance Medium corrosion resistance Strong corrosion resistance, seawater
    Medium
    Suction section ZG230-450 2Cr13,304or316 316Lor dual phase steel
    Spit out section
    Middle section ZG230-450
    Guide vane
    Impeller
    Cooling body
    Balance disc Standard:2Cr13high matching quenching Standard:2Cr13high matching quenching
    Optional:2Cr13 nickel base alloy Optional:316L nickel base alloy
    balance ring Standard:3Cr13high matching quenching Standard:3Cr13high matching quenching
    Optional:3Cr13 nickel base alloy Optional:316L nickel base alloy
    Shaft 2Cr13or40Cr 2205or17-4PH
    Note:1In addition to the above three types of material configuration production, but also according to the media characteristics and customer requirements material configuration production.
    2The material of the shaft is configured according to the specific characteristics of the transmission medium and the shaft power
    3Because of corrosive medium(Especially mixed corrosion medium)The characteristics vary greatly, so please verify the material configuration and other related matters before signing this kind of order.

    SD, SDG, SMD, SDF, SDY pump structure diagram

     

     

     

     

     

     

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