Type D,DG,MD,DF,DY Multi-stage Centrifugal Pump

General
  The serial pump is multi-stage sectional centrifugal pump with the excellent hydraulic model, it has advantages of high-efficiency, energy-saving, wide performance range, operating safely and steadily, low noise, long life and convenience for installing and repairing etc. It can deliver heat water, oil, corrosive or wearable medium by changing material of pump .
  Type D pump is used in mine and urban project for delivering clear water without solid particles or other liquids which are physically or chemically similar to clear water. The temperature of liquids are not be over 80°C.
  Type DG pump is used to deliver clean water without solid particles or other liquids which are physically and chemically similar to clear water. It is suitable for boiler feed or delivery hot water or medium similar to hot water. The temperature of liquids are not be over 105°C.
  Type MD pump is used to deliver neutral water with solid particles below 1.5% (viscosity less than 0.5mm) and other sewage. It is suitable for using in steel factory and mine etc. The temperature of liquids can not exceed 80°C.
  Type DF pump is used for delivering corrosive liquids without solid particles, the temperature of liquids is -20°C~105°C.
  Type DY pump is used for delivering oil and petroleum products without solid particles and viscosity below 120 centistokes , the temperature of liquids is -20°C~105°C.
  The inlet pressure of all above pumps is less than 0.6Mpa. Nomenclature
  D(DG,MD,DF,DY)85-67×3  D—Multi-stage horizontal centrifugal pump
  DG—Multi-stage boiler feed pump
  MD—Multi-stage wearable centrifugal pump
  DF—Multi-stage anti-corrosive centrifugal pump
  DY—Multi-stage centrifugal oil pump
  85—The capacity is 85m3/h at design point
  67—The single stage head is 67m at design point
  3—The stage number is 3 stage
  For example 100D16×3
  100—Inlet diameter of pump is 100mm
  D—Multi-stage horizontal centrifugal pump
  16—The single stage head is 16m at design point
  3—The stage number is 3 stage


Range of performance(Design point)
  Capacity: 6.3~600m3/h
  Head;   22.8~650m
Construction feature
Type D (DG,MD,DF,DY) pump consists of stator, rotator, bearing and shaft seal:
1. Stator: main parts is suction casing, stage casing, discharge casing and Diffusor, they are screw up by poles to become a working house. The suction direction of type D pump is horizontal, its discharge direction is upward; the discharge direction of type MD,DF,DY pumps are upward, the suction direction is horizontal, They can be made upward according to user requirement.
2. Rotor: it is consist of shaft, impeller, balance disc, and shaft sleeve etc. shaft supplied power to impeller. The axial force is balanced by disc. The shaft sleeve is mounted on shaft to protect shaft.
3. Bearing parts: it is consist of bearing body, bearing and bearing cover etc. The bearing of type 85-67,155-67,600-60 pump is sliding bearing , lubricated by dilute oil, the other pump bearing is rolling bearing, lubricated by grease.
4. Shaft seal: it is usually adopted soft packing seal, consist of sealing house on suction casing, packing , blocking water ring, the seal house have some pressure water to cool. Lubricate and seal pump. Type D pump pressure water come from pump itself, type DG, MD, DF, DY pump pressure water is come from pump itself or outer water, type DG, MD, DF, DY pump usually adopt mechanical seal .
  Drive
  The pump is driver directly by motor through coupling. View from motor end, the rotating direction of pump is clockwise.