Multistage Single Suction Centrifugal Pump

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General Description

D/MD/DF/DY series pump is multi-stage single suction sectional centrifugal pump with 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 the pump or coupled with extra cooling system.
 

D series 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 must not exceed 80℃.
MD pump is used to deliver neutral water with solid particles below 1.5% (viscosity less than 0.5mm) and other sewage water. It is suitable for using in steel factory and mine etc. The temperature of liquids must not exceed 80℃.
DF pump is used for delivering corrosive liquids without solid particles, the temperature of liquids is -20℃~105℃.
DY pump is used for delivering oil and petroleum liquid without solid particles and viscosity below 120 centistokes , the temperature of liquids is -20℃~105℃.
The inlet pressure of above pumps is less than 0.6Mpa.

Performance Range
Capacity: 6.3-600m3/h
Head: 22.8-650m

Instruction of pump type
For example D(MD,DF,DY) 85-67X3
D: Multi-stage horizontal centrifugal pump
MD: Multi-stage wearable centrifugal pump
DF: Multi-stage anti-corrosive centrifugal pump
DY: Multi-stage oil centrifugal pump
85: Rate capacity is 85 m3/h
67: Rate head is 67m
3: 3 stage(3 impellers)

Structure
Type D (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 disk, 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 MD, DF, DY pump pressure water is come from pump itself or outer water, type 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.

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Q:TDH what units are present in the pump parameters?
In the pump parameters, TDH is the head of President (Ying Chi).The formula is as follows:TDH (Ying Chi) = total head (Ying Chi) = (- water pressure readings + drainage pressure gauge (drainage dynamic head - water head + (drainage pressure gauge - water pressure elevation correction table elevation correction)
Q:What is the influence of the speed of the pump motor on the pump?
The question is very general,In general, high speed motors are used in 2 stages, 2900 revolutions per secondLow speed motor with 4 stage, 1450 revolutions per secondYou can probably generalize to thisWith the flow, head, run the pump speed type low noise will be reduced but the service life of the motor (relatively high speed), but the speed of price ratio low speed expensive (motor level 4 level 2 line than for more than copper)For example, it seems that the reason why turtles live longer is that their heart rate is slow.
Q:Is there a water pump with its own flow regulating function?
It has a water pump with adjustable flow capacity, I used it. Can also landing professional production pump manufacturers web site inquiries.
Q:Pump adapter belongs to the system of fire pool equipment?
Does not belong to the fire pool system! Pump adapter is mainly used for fire engines through the adapter system pressure, outdoor fire hydrant fire with one hand, one hand is to provide water for the fire truck. According to the 10~15L/S calculation of each pump adapter
Q:4--6 inch deep well pump head? How much per hour out of water?.
General agricultural pump 4-6 inches of lift at about 20 meters, the economic output of water is 140-200 cubic meters per hour
Q:What will the water pump reversal situation?
The same will reverse pump water, but the head and the pressure greatly reduced, I just finished debugging a pumping station, Stephen multi-stage pump, installation of equipment: multistage water pump motor power 4 75KW 76% head 100 meters, frequency control, motor nameplate nominal current of 143. According to the direction of the motor steering pump mark OK set the start time of 28 seconds after 5HZ boot head start frequency can reach 50 meters (at that time did not install the pressure gauge cannot observe the water pressure of current) in early 118 about 3-5 minutes after the current is reduced to about 97, there are inspection found no problems, suspected pump problems, suspected foot valve not completely open, the reason cannot exclude the end of valve, almost in despair when the thought is not marked in the direction of the pump, re set to restart the current 129.5A to observe that later installed capacity reached 0.55MPa duct pressure gauge head close to the design requirements, the problem on the manufacturer's mark is reverse.
Q:What is the function of the pump?
Drainage or irrigation
Q:What is a variable frequency water pump? What's the difference between a variable frequency pump and an ordinary pump?
1, frequency conversion water pump is based on ordinary water pump. The so-called common pump means without any automatic control device of the pump, only the pump head and the motor and a base. The power supply is switched on (default: 220/50Hz or domestic power single-phase three-phase 380V/50Hz) run off, stop. Ordinary pumps do not refer to a particular type of pump, can be centrifugal pumps, pipe pumps, vortex pumps, multi-stage pumps and other pumps commonly used.2, the variable frequency pump, is supplemented by a one-way valve, pressure tank, inverter, constant pressure water supply controller, sensor, valve or electrical components in general based on the composition of water pump with automatic function, and automatic constant pressure frequency conversion water supply device. The input power of frequency conversion water pump can be single phase 220V/50Hz or three-phase 380V/50Hz, but the motor of frequency conversion water pump is usually three-phase. The incoming line is a single-phase 220V variable frequency water pump. The motor is a three-phase 220V motor, the input line is three-phase 380V, and the pump motor is three-phase 380V.Two, the differenceAccording to the definition above, the difference between variable frequency water pump and ordinary water pump is obvious. The main differences: first, the frequency pump has automatic function and constant pressure; ordinary water pump does not; second, variable frequency water pump is a unit, the price is much more expensive than the ordinary water pump.
Q:When the pump is connected in parallel, will the head and flow change?
Depends on how you do it.If you have a pump, the original network is the same, you add a pump, the result is the head and flow increases, the efficiency also changed, increase the number of head and flow, depending on the network characteristics, network characteristics such as steep increase, economy is also poor, which is not recommended. In fact, the actual flow of two pumps plus the actual lift equal, the problem is that the head, flow point of operation has changed.If it is new design, according to the required flow calculation of the required head, according to the head, half of the flow to select the pump, that is, two pumps flow volume, lift equal.
Q:How does a pump pump water?
Centrifugal pump is the use of centrifugal force to increase the pressure of water and make it flow of a pump. It is composed of pump shell, impeller, rotating shaft and so on. The motor drives the rotating shaft, the rotating shaft drives the impeller to rotate at a high speed in the pump casing, and the water in the pump is forced to rotate with the impeller to generate centrifugal force. The centrifugal force forces the liquid from the impeller periphery to throw, the high speed, the high pressure water flows through the pump shell outside the pump, the impeller center forms the low pressure, thus draws in the new water flow, forms the unceasing water current transportation function.

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