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Submersible Pumps >> QDX-NF Stainless Steel Wastewater Pumps

Performance Range:
Flow Rate Up to 20 m3/h
Dynamic Head Up to 18 m
Power: 0.37 to 1.1 kw

Operating Limits
Maximum Operating Depth 5m below water level
Maximum Fluid Temperature Up to 50℃
Max. size of solids: 12mm
PH value in water is 4-10
Liquid Gravity: less than 1.2 kg/liter

The QDX-NF pumps are designed for slightly more demanding domestic drainage jobs. The pump fits into narrow drainage pits, and the use of stainless steel makes the pumps virtually maintenance free. The strainer, which will allow solids up to 12mm to pass, can be dismantled for cleaning without the use of special tools.

Structures:
The pumps are made with a stainless steel pump sleeve and housing, made in one piece. The suction strainer prevents the passage of large solids while ensuring a slow flow into the pump. As a results, most impurities will be deposited outside the pump.

Pumped liquids:
QDX-NF pumps are suitable for pumping of:
Clean, non-aggressive water
Grey wastewater without solid particles or fibers
Drainage water with solids up to 12 mm size
Liquid temperature:
Min. liquid temperature: 0℃
Max. liquid temp. at continuous operation: 50℃
For periods not exceeding 2 minutes at intervals of at least 30 minutes: 70℃
During continuous pumping the suction strainer must always be completely covered by the liquid.
Impeller

The QDX-NF impeller is made of stainless steel. It is of a semi-open type with L-shaped impeller blades. The blades curve backwards in order to reduce any harmful effects from solid particles and to reduce power consumption.

Motor
The QDX-NF motor is an asynchronous dry motor. The pumped liquid cools the motor. Welding hermetically seals the motor unit and no filling compounds have been used.
At the top of motor, single-phase pumps have a capacitor housing with capacitor and sockets for the motor cable and float switch. Oil is used as a barrier fluid between the pumped liquid and the motor unit.
Enclosure class: IP68
Insulation class: F

Installation
The QDX-NF pumps are available for manual or automatic operation. For manual on/off operation, the pump is supplied without a float switch.
For automatic operation, the pump can be supplied with a built-in float switch (single phase models). Three phase models can be supplied with a separate float switch and control box.
Pumps fitted with float switches can also be used for manual on/off operation if the float switch is fixed in an upwards-pointing position.
The pumps can be used in a vertical, horizontal or titled position, as long as the discharge port remains the uppermost part of the pump.

Application
The QDX-NF pumps are suitable for following application:
Groundwater lowering
Pumping from drainage pits
Pumping from surface water pits with inflow from roof gutters, shafts, tunnels etc.
Emptying of ponds, tanks etc.

Specification Data at n=2850rpm

Model

Rated Flow

Rated Head

Max. Solid size

Speed

Power

Discharge

m3/h

m

mm

rpm

kw

inch

QDX3-10-0.37NF

3

10

12

2850

0.37

1 1/2

QDX6-10-0.55NF

6

10

12

2850

0.55

1 1/2

QDX10-10-0.75NF

10

10

12

2850

0.75

1 1/2

QDX12-7-0.75NF

12

7

12

2850

0.75

1 1/2

QDX15-7-1.1NF

15

7

12

2850

1.1

1 1/2

QDX8-15-1.1NF

8

15

12

2850

1.1

1 1/2

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