| Max.Head: | >150m |
|---|---|
| Max.Capacity: | 300-400 L/min |
| Driving Type: | Motor |
| Material: | Cast Iron |
| Structure: | Multistage Pump |
| Assembly: | Booster Pump |
| Customization: |
|---|
Suppliers with verified business licenses
Audited Supplier === OVERVIEW ===
Model QD(G) Stainless Steel Housing Material and Free standing Installation heat water pump swimming pool heater is a horizontal centrifugal boiler feed multistage pump and suitable for transporting liquid (with the contained foreign matters' content less than l % and graininess less than 0. 1mm) and other liquids.
QD(G) model middle and low pressure boiler fuel multistage pump is applicable to transport medium with temperature of not higher than 105ºC, and is also applicable for small boiler water supply or transporting medium similar to hot water.
QD(G) model hypo high pressure boiler multistage pump is used to transport medium with temperature of not higher than 160ºC, and is also applicable for small boiler water supply or transporting medium similar to hot water.
| Flow rate | 3.75-1100m3/h |
| Head | 70-2300m |
| Driven type | Motor or Diesel engine |
| No of stage | 3-12 |
| Motor power | 4.0-8000 kw |
| Speed | 680-5255rpm |
| Sealing type | Packing/Mechnical |
| Medium temperature | 160°C max |
=== APPLICATION ===
Type QD(G) high pressure Stainless Steel Housing Material and Free standing Installation multistage pump swimming pool heater are used for feeding high pressure boiler or pumping high pressure fuel.
The temperature of pumped media is not more than 160ºC.
1)Municipal engineering,Wastewater treatment, constructional engineering
2)Agricultural irrigation, transfer water etc.
3)High-rise buildings water supply and drainage, and for fire working
4)Factory and mining for distance water supply and drainage
5)Circulation water supply for production process
6)Cooling systems of air-conditioning in hotels
7)Domestic water supply
The boiler feed multistage pump is allowed to run within the set parameter range only.
The multistage pump is not allowed to run with the spitting valve closed or closed to a little opening, or it will be caused heated and duration lowered. Each multistage pump is required to run under the special parameters so as to guarantee the flow of it if mounted in a parallel system.
The multistage pump can not run with the suck-in valve closed, or it may be dried moving to cause parts damaged.
The medium the pump transports can not contain air or gas, or both flow and head of the pump may not be accurately measured and, meanwhile, grinding maybe produced to damage parts.
This multistage pump is not allowed to transport any material with grains, or both pump efficacy and part duration may be lowered.
To keep the boiler feed multistage pump in a high effective and stable work, it must be often repaired, the items of repair and the interval between every repair depend on the working condition and running state of it.
=== DRIVER ===
Electric motor
The boiler feed multistage pump is driven by the motor through the coupling The gear, membrane coupling and hydraulic coupling can be used according to client's requirements. The pump can be driven by turbine or motor.The rotating direction of pumps are clockwise when viewed from the driving end.
=== CONSTRUCTION DRAWING ===
=== CURVE CHART ===
=== PERFORMANCE LIST ===
| Pump Type | Flow (m3/h) |
Head (m) |
Power (KW) |
Speed (r/min) |
| QDG 6-25 | 3.75-7.5 | 73.5-306 | 4-11 | 2950 |
| QDG 12-25 | 7.5-15 | 69-338.4 | 5.5-22 | 2950 |
| QDG 12-50 | 7.5-15 | 139.5-648 | 18.5-75 | 2950 |
| QDG 25-30 | 15-30 | 82.5-340 | 15-45 | 2950 |
| QDG 25-50 | 15-30 | 15.78-618 | 22-110 | 2950 |
| QDG 46-30 | 30-55 | 81-340 | 22-75 | 2950 |
| QDG 46-50 | 30-55 | 138-666 | 37-132 | 2950 |
| QDG 85-45 | 55-100 | 78-459 | 37-160 | 2950 |
| QDG 85-67 | 55-100 | 183-666 | 90-250 | 2950 |
| QDG155-67 | 100-185 | 177-684 | 132-400 | 2950 |
| QDG280-43 | 185-335 | 114-423 | 160-450 | 1480 |
| QDG280-65 | 185-355 | 372-680 | 500-800 | 1480 |
| QDG450-60 | 335-500 | 171-650 | 360-1050 | 680 |
| Type | Flow (m3/h) |
Head (m) |
Speed (r/min) |
Eff (%) |
NPSH | (kw) |
| 1QD(g)-8 | 120-170 | 967-1040 | 2980 | 68-71 | 4.5 | 710 |
| 1QD(G)-9 | 120-170 | 1088-1170 | 2980 | 68-71 | 4.5 | 800 |
| 1QD(G)-10 | 120-170 | 1208-1300 | 2980 | 68-71 | 4.5 | 800 |
| 1QD(G)-11 | 120-170 | 1330-1430 | 2980 | 68-71 | 4.5 | 1000 |
| 1QD(G)-12 | 120-170 | 1450-1560 | 2980 | 68-71 | 4.5 | 1000 |
| 2QD(G)-8 | 200-280 | 1184-1344 | 2980 | 74-75 | 5 | 1400 |
| 2QD(G)-9 | 200-280 | 1330-1512 | 2980 | 74-75 | 5 | 1600 |
| 2QD(G)-10 | 200-280 | 1480-1680 | 2980 | 74-75 | 5 | 1600 |
| 3QD(g)-10 | 360-496 | 1470-1660 | 2985 | 80.1-82.4 | 8 | 2500 |
| 4QD(G)-8C | 500-600 | 1580-1670 | 2985 | 77-80 | 10 | 3400 |
| 5QD(G)-10 | 500-620 | 2100-2210 | 2987 | 80-82 | 10 | 4800 |
| QD(G)270-140B | 270-440 | 1422-1570 | 2985 | 74-78 | 5 | 2300 |
| QD(G)270-140C | 270-440 | 1460-1750 | 2985 | 75.5-79 | 5 | 2300 |
| QD(G)400-180B | 245-415 | 1800-1940 | 4640 | 80-82 | 12 | 3200 |
| QD(G)400-180C | 400-500 | 1815-1975 | 2985 | 77-79 | 12 | 4000 |
| QD(G)450-180 | 400-500 | 1700-1920 | 4640 | 75-79 | 23.5 | 3200 |
| QD(G)500-140 | 450-550 | 1400-1540 | 4640 | 75-79 | 23.5 | 3200 |
| QD(G)600-230 | 540-650 | 2260-2500 | 5410 | 82-86 | 23.5 | 4800 |
| QD(G)700-170 | 600-740 | 1640-1810 | 5000 | 80-84 | 23.5 | 4500 |
| QD(G)1000-220 | 900-1100 | 2100-2320 | 5255 | 82-86 | 23.5 | 8000 |
=== MORE RELATED PRODUCTS ===
=== FAQ ===
A. The completed supply of electric multistage pump group includes:
1 Water supply pump, pre-pump and its inlet filtering screen
2 Motor
3 Hydraulic coupler and oil cooler for both working and lubricating oils
4 Check valve at the outlet of the water pump
5 Minimum flow device : includes recycling valve, stop valve and flow measurer
6 Clutch and other accessories
7 Oil thin station
8 Of which the motor, recycling valve, hydraulic coupler, oil thinning station, check valve,pre-pump, stop valve and flow measurer can also be purchased by clients and this Co.will be in charge of technical coordination.
B. Please provide the following parameters when to order the product of this Co.:
1. Flows at the outlet of the water pump and the tap (boosting class)
2. Pressures(or the water pump group's head) at the outlet of the water pump and the inlet of the pre-pump
3. Water supply temperature
4. Pump group's type(steam-powered or electric pump)
5. The installation dimensions are to be provide at order upon the contract requirement
Suppliers with verified business licenses
Audited Supplier 
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