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:How to fix a water-pumping machine...?
not knowing the specific system, prolly correct. pipe frozen and what you feel is just bypass/recirc. as the water has no where to go. or there's an external leak somewhere under the house? keep doing that, depending on the system, and it's condition, might burn up a pump. many different kinds of systems. for a house or motor home, usually have one that's pressure activated. that is, pressure drops as a tap is opened, regualator sees that, starts the pump running. that would be a system that employs a reservoir. probably air charged. to sense pressure drops.a nd max pressures to shut the system off. but that may not be what you have. many different configs. USAF trained hyd/pneu tech. glorified plumber i guess.
Q:How to replace a water pump on a Mercedes E320?
First you have to mention which E320 you have. It could be either a gasoline or diesel model and the E320 model designation has had the M104 I6, M112 V6, M613 I6 diesel, and M642 V6 diesel under the hood. The water pump is not located in the same place on all engines.
Q:Water well pump, always on??
Sounds like you have a holding tank problem. Check to see if it is leaking air. Or you could have a busted pipe somewhere, you could cut the water off in the house but not at the pump to see if it continues. If so the problem is at the well, if the problem stops after the tank refills you have a busted pipe between the pump and the house.
Q:Water Pump Questions?
the water pump has a small weep hollow on the backside the place it incredibly is going to leak small strains of coolant/water. it incredibly is a hallmark that the seal interior the pump is going undesirable. it may pass from a small leak to leaking like a cow pissing on a flat rock at every time. if this occurs the motor will overheat and you're able to finally end up caught on the edge of the line. the estimate sound genuine looking and does it incorporate the tax and each thing?
Q:Why does the pump decay when connected in parallel?
Pump parallel mainly solves the problem of insufficient flow. After parallel, the flow is two and the sum of the pumps. When the flow rate increases, the pressure loss of the pipeline will increase, so the water pump flow in parallel will not be the sum of the two pump flow, but less than the sum of the flow rate. The solution is to increase the diameter of the water supply pipe, reduce the angle bend and shorten the distance.........
Q:how does the simplest form of a water pump work?
Natural okorder.com/
Q:What is wrong with my water pump?
I'm guessing that you have a well. The others had some good points and I would just like to add that I had a similar problem with my pump. Turned out that the tank had to much air in it and was fooling the pressure switch.
Q:Two pumps automatically switch start control circuit,
The puddle is full, the float switch is closed, and the relay J1 works to drive the first motor. The J1's work makes the intermediate relay 'J' work and locks itself, preparing for the work of the second machines. The water level is lowered to the required minimum position, the ball is broken, the motor is stopped and the motor is stopped. When the water level rose to the highest position again, the floating ball closed again, the relay J2 and self-locking relay J2 to drive second motors, instant intermediate relay are opened, when the water level again be reduced to the lowest position, float off, the motor stops working, stop by working in front of the intermediate relay. The whole circuit back to the original state. So that the two motors work alternately.It should be noted that the circuit diagram for simple to understand, only painted the control circuit, there is no main circuit, there is no missing phase, leakage, over-current and other protection, the actual installation needs to be installed. There is the role of time relay is to ensure that the relay J2 normal work, the intermediate relay is disconnected, so that the motor 2 does not occur wrong action, time relay can be set to a few seconds, or even less than a second. Intermediate relay can also be controlled by time relay, and its time is also set very small, so as to avoid J2 short time possible power supply.
Q:The water well pump is surging water pressure is dropping and keeps tripping the breaker?
So you have been fighting with this for a year? And you haven't been able to fix it? And you want to keep trying rather than hire an expert? Well, you are stubborn I have to admit that. Hire a well guy. In 10 minutes he will tell you what the problem is and what it will cost to fix it.
Q:The role of impeller in water pump
Pump impeller through the motor to drive rotation, so that the medium (water) by centrifugal force or lifting force, so that the medium has mechanical energy (kinetic energy)

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