Multistage Single Suction Centrifugal Pump DG Series

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General Description

DG horizontal Multi-stage boiler feed pump can delivery clear water without solid particles or other liquid which the physical and chemical feature is similar with clear water. It is suitable for boiler feed water or deed water for high pressure boiler. The temperature range of the liquid is from -20℃ to150℃, and the inlet pressure is not allowed more than 0.6Mpa.

Performance range  
Capacity : 3.75~ 288m3/h
Head :  50 ~ 1540m

Instruction of pump type
For Example  DG25-80X10
DG — Single-suction, multi-stage, boiler feed pump.
25 — Pump capacity 25 m3/h.
80 —Single-stage head of pump 80m .
10 — pump stage number is 10.

Structure
DG series pump is single casing segmental multi-stage centrifugal pump, the main parts is stator, rotor, bearing and shaft.
Stator part: it mainly consists of suction stage, mid-stage, discharge stage and diffuser; they are strained through a lever and form a working chamber. The inlet and the outlet are vertical upward. The combined surface between each stage is sealed through metal surface and also with sealing o-ring as auxiliary seal.

Rotor part: it mainly consists of shaft, impeller, and balance drum and shaft sleeve. Shaft transfers power to impeller and make it work. The axial force is balanced by balance disc and there is rechargeable shaft sleeve to protect shaft.

Bearing part: It mainly consists of bearing body, shaft cover and sliding bearing. There are two single centripetal ball bearings in bearing body to prevent balance disk from abrasion. The sliding bearing is lubricated by dilute oil, there is cooling chamber in bearing body and the bearing can be cooled with exterior water.

Shaft seal part: shaft seal uses soft packing seal. It mainly consists of seal box, packing, packing ring and packing cover. The shaft is sealed, cooled and lubricated by exterior water from seal chamber. The mechanical seal can also be used as requirement and it need be cooled, lubricated and washed by exterior water.

Drive: Pump is directly driven by motor through flexible coupling. View from motor end, the rotating direction of pump is clockwise.

Material of main parts  
The medium-contacting parts are made of cast iron .

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Q:My water heater pump keeps tripping the main electric panel...?
It does sound, by coincidence, that your elements, or one of them, are going out. Have an electrician check them out. How many do you have? One heater, two elements. How old is the heater, if over ten years, get a new one. A lot cheaper then replacing the elements. Go to Home Depot and have them do the whole job.
Q:A pump, the flow rate of 30T/H per hour, lift 30 meters, should be allocated more power motor?
The actual use of power should be at least 5.5kW, I did not find 30t/H lift 30 meters of the water pump, and only he approached the model, supporting a larger power, and will not increase the power consumption
Q:Is my cars water pump broken? Squealing noise..?
If you have ample room to change a water pump, go for it; however, keep in mind some cars use that belt for timing. If the belt is also a timing belt, take it your branded dealer.
Q:Do you need to replace the water pump on your car when replacing the water pump gasket?
well, since they gotta take all that crap off to change the gasket, I would, it's cheap insurance..
Q:What does "ETA" mean in the selection of pumps?
Water pump selection table "ETA" is the meaning of efficiency. NPSH refers to the pump's cavitation margin.ETA is abbreviated as "efficient ratio", and Chinese means "water efficiency". The efficiency of the pump here is generally referred to as the efficiency of the pump design point because the actual efficiency of the pump varies with the pump operating conditions. The efficiency of the ETA can also be interpreted as the efficiency of the pump at the rated lift (or rated flow).
Q:How long will a bad water pump last?
A leaking water pump could be caused by a bad gasket so it does not have to be changed. Changing a gasket is cheaper. If the leak is due to a crack or a pinhole, then by all means have it changed otherwise you risk a crack of the cylinder head caused by overheating which can cost your thousands. You can get a reconditioned or 2nd hand water pump and can save you money. Just ask your Napa store. Typically, second hands are 20% cheaper and can last for years. Good luck.
Q:Timing Belts and Water Pump?
Some cars have different designs. The water pump on my 96 Century could have been done in a matter of minutes. Where as some are much deeper in the engine. Usually, to change a water pump like this is pretty much one more step than changing the timing belt. This is why it's usually a good idea to do them both at once.
Q:How to find in a web how water pump works & its cross sections?
My suggestion is go and search in the website howstuffworks
Q:What is the reason for the overload of the water pump indicator?
In this case, first check the frequency of the pump in the acceleration and deceleration time, to see how many seconds, 7.5KW10 seconds or so, 11KW 10 to 15 seconds, to see whether the peak water supply, low voltage and so on! Hope to be of some help to you!
Q:Tightening bolts on volvo water pump...?
Volvo Water Pump

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