Product Overview
The WQ/QW Non-Clogging Submersible Sewage Pump is a next-generation wastewater pump developed by our engineering team through extensive research and multiple technical improvements. All performance indices have been strictly tested and verified. This pump features high energy efficiency, anti-clogging performance, non-blocking hydraulic design, automatic installation, and control functions. It efficiently handles solid particles and long fiber debris.
Flow Rate: 7–2400 m³/h
Head: 7–60 meters
The WL, YW, and GW series also offer equivalent performance parameters based on the pumped media and installation requirements.
Model Designation
Key Features
-
Unique single or double-blade impeller design significantly improves solid handling capacity, allowing it to handle fibrous materials up to 5 times the pump inlet diameter and particles about 50% of the inlet hole size.
-
Advanced corrosion-resistant hard alloy mechanical seals provide over 8000 hours of continuous safe operation.
-
Compact structure with small footprint, low noise, and easy maintenance. The pump operates normally when fully submerged and does not require a pump house, significantly reducing civil building costs.
-
The seal oil chamber is equipped with high-precision anti-interference leak sensors, and a thermal protector is embedded in the winding of the positioning device to provide automatic motor protection.
-
Optional fully automatic control panel prevents leaks, overloads, overheating, and other operational failures, enhancing overall safety and reliability.
-
The float switch automatically starts and stops the pump based on liquid level changes, eliminating the need for manual operation.
-
The WQ series can be equipped with a dual-rail automatic coupling system for easy installation and maintenance, with no need to enter the sewage pit.
-
The pump operates within the entire head range without overloading the motor.
Engineering Summary
The WQ/QW Submersible Sewage Pump is designed with high efficiency and advanced materials to ensure smooth flow, reliable performance, and long service life. The pump’s compact structure and wear-resistant parts extend its lifespan and minimize the risk of secondary contamination. The pump operates efficiently in submerged conditions, and its self-priming design prevents clogging, ensuring smooth operation even with solid particles and fibers.
Typical Applications
The WQ/QW Series Submersible Sewage Pumps are suitable for various applications, including:
-
Pumping wastewater with solid waste in chemical, petroleum, pharmaceutical, mining, paper-making, cement, steel, power plants, coal processing, municipal sewage treatment plants, and urban drainage systems.
-
Suitable for pumping clean water or mildly corrosive liquids.
-
Ideal for use in pumping stations, construction sites, and municipal projects.
System & Operation
Components & Supply
-
The pump is equipped with a rigid coupling between the motor and pump head, ensuring structural integrity and reliable performance.
-
The pump features a single or double-blade impeller that improves the handling of solids and fibers.
-
The mechanical seal is made of advanced corrosion-resistant hard alloys to extend operational life.
-
The pump comes with a compact structure, low noise, and a modular design for easy maintenance and quick installation.
Technical Specifications
Operating Conditions
-
Liquid Temperature:
• Standard Pump: −15°C to +70°C
• Hot Water Pump: +70°C to +110°C -
Ambient Temperature: Up to +40°C
-
Maximum Working Pressure: 10 bar
-
Maximum Allowable Inlet Pressure: Limited by system working pressure
-
Media Requirements:
• Clean, low-viscosity, non-flammable, sulfur-free liquids, free from solid particles or fibers.
• Suitable for mineral water, softened water, purified water, light oils, and mild chemical fluids.
• If the density or viscosity of the liquid is higher than that of water, a motor with higher power must be selected.
• The pump’s suitability for specific liquids depends on factors such as chloride content, pH, temperature, and solvent/oil content.
Service Conditions
-
Installation Altitude: Must not exceed 1000 meters; for higher elevation applications, specify at the time of order for proper configuration.
-
The pump must not be used in flammable or explosive environments, nor should it handle combustible liquids.
-
Installation must be in well-ventilated, dry, and vibration-free areas.
-
Maximum ambient temperature should not exceed 40°C.
Protection Functions
-
The motor must be equipped with overload, phase failure, and overheat protection devices to prevent damage under abnormal conditions.
-
It is recommended to use dry-run protection to prevent mechanical seal failure in the absence of liquid.
-
Pressure switches or variable frequency drives (VFDs) should be employed to maintain safe pressure ranges.
-
Check valves and anti-backflow devices must be installed to prevent reverse flow from damaging the pump.
Selection Criteria
-
Select the pump model and number of stages based on required flow rate and head.
-
Choose wetted materials (e.g., SS304, SS316L) based on fluid temperature, pH, and chloride concentration.
-
Select sealing structure (mechanical seal or packing seal) based on the fluid’s corrosive properties.
-
Ensure installation space and piping layout compatibility with the horizontal configuration.
-
If the pumped liquid has higher viscosity or density than water, a higher-rated motor should be chosen to meet the required shaft power.
Installation & Dimensions
Outline Drawing
Performance Data
|
No.
|
Name
|
No.
|
Name
|
No.
|
Name
|
No.
|
Name
|
|
1
|
Signal Cable
|
6
|
Upper Bearing Seat
|
11
|
Oil-Water Probe
|
16
|
Impeller Bolt
|
|
2
|
Motor Lead Wire
|
7
|
Motor Housing
|
12
|
Oil Chamber
|
17
|
Impeller
|
|
3
|
Terminal Box
|
8
|
Stator
|
13
|
Mechanical Seal
|
18
|
Seal Ring
|
|
4
|
Motor Cover
|
9
|
Shaft (Rotor)
|
14
|
Rear Cover Plate
|
19
|
Base Plate
|
|
5
|
Bearing
|
10
|
Bearing
|
15
|
Pump Body
|
Outline Drawing（2）
Performance Parameters
|
Model
|
Port Size
|
Flow Rate
|
Head
|
Speed
|
Power
|
Efficiency
|
A
|
B
|
C
|
D
|
H
|
Auto Coupler
|
|
mm
|
(m3/h)
|
(M)
|
(r/min)
|
(kw)
|
(%)
|
|||||||
|
25-7-8-0.55
|
25
|
7
|
8
|
2900
|
0.55
|
45
|
120
|
360
|
225
|
210
|
540
|
|
|
25-8-22-1.1
|
25
|
8
|
22
|
2900
|
1.1
|
45
|
120
|
360
|
225
|
210
|
540
|
|
|
32-8-12-0.75
|
32
|
8
|
12
|
2900
|
0.75
|
48
|
120
|
360
|
225
|
210
|
540
|
|
|
32-12-15-1.1
|
32
|
12
|
15
|
2900
|
1.1
|
45
|
120
|
360
|
225
|
210
|
540
|
|
|
40-15-15-1.5
|
40
|
15
|
15
|
2900
|
1.5
|
48
|
120
|
360
|
225
|
210
|
540
|
|
|
40-15-30-2.2
|
40
|
15
|
30
|
2900
|
2.2
|
54
|
120
|
360
|
225
|
210
|
540
|
|
|
50-20-7-0.75
|
50
|
20
|
7
|
2900
|
0.75
|
51
|
145
|
440
|
275
|
185
|
520
|
GAK-50
|
|
50-10-10-0.75
|
50
|
10
|
10
|
2900
|
0.75
|
52
|
120
|
250
|
230
|
185
|
520
|
GAK-50
|
|
50-20-15-1.5
|
50
|
20
|
15
|
290
|
1.5
|
53
|
120
|
250
|
230
|
210
|
564
|
GAK-50
|
|
50-15-25-2.2
|
50
|
15
|
25
|
2900
|
2.2
|
54
|
145
|
410
|
245
|
205
|
550
|
GAK-50
|
|
50-18-30-3
|
50
|
18
|
30
|
2900
|
3
|
55
|
155
|
420
|
250
|
260
|
660
|
GAK-50
|
|
50-40-15-4
|
50
|
40
|
15
|
2900
|
4
|
55
|
140
|
457
|
264
|
310
|
730
|
GAK-50
|
|
50-25-32-5.5
|
50
|
25
|
32
|
2900
|
5.5
|
55
|
165
|
480
|
285
|
310
|
770
|
GAK-50
|
|
50-20-40-7.5
|
50
|
50
|
20
|
2900
|
7.5
|
58
|
175
|
480
|
285
|
310
|
770
|
GAK-50
|
|
65-25-15-2.2
|
65
|
25
|
15
|
2900
|
2.2
|
50
|
145
|
450
|
280
|
205
|
570
|
GAK-65
|
|
65-37-13-3
|
65
|
37
|
13
|
2900
|
3
|
57
|
165
|
475
|
305
|
260
|
652
|
GAK-65
|
|
65-25-30-4
|
65
|
25
|
30
|
2900
|
4
|
61
|
170
|
505
|
300
|
325
|
710
|
GAK-65
|
|
65-30-40-7.5
|
65
|
30
|
40
|
2900
|
7.5
|
56
|
GAK-65
|
|||||
|
65-35-50-11
|
65
|
35
|
50
|
2900
|
11
|
45
|
165
|
460
|
300
|
350
|
920
|
GAK-65
|
|
65-35-60-15
|
65
|
35
|
60
|
2900
|
15
|
65
|
165
|
460
|
300
|
350
|
920
|
GAK-65
|
|
80-40-7-2.2
|
80
|
40
|
7
|
1450
|
2.2
|
59
|
165
|
510
|
330
|
260
|
640
|
GAK-80
|
|
80-43-13-3
|
80
|
43
|
13
|
2900
|
3
|
70
|
165
|
540
|
330
|
325
|
652
|
GAK-80
|
|
80-40-15-4
|
80
|
40
|
15
|
2900
|
4
|
61
|
180
|
565
|
330
|
325
|
775
|
GAK-80
|
|
80-60-13-5.5
|
80
|
60
|
13
|
2900
|
5.5
|
67
|
165
|
565
|
330
|
325
|
775
|
GAK-80
|
|
80-65-25-7.5
|
80
|
65
|
25
|
2900
|
7.5
|
63
|
180
|
656
|
330
|
325
|
775
|
GAK-80
|
|
Model
|
Port Size
|
Flow Rate
|
Head
|
Speed
|
Power
|
Efficiency
|
A
|
B
|
C
|
D
|
H
|
Auto Coupler
|
|
mm
|
(m3/h)
|
(M)
|
(r/min)
|
(kw)
|
(%)
|
|||||||
|
100-80-10-4
|
100
|
100
|
10
|
1450
|
4
|
65
|
220
|
700
|
430
|
420
|
800
|
GAK-100
|
|
100-100-15-7.5
|
100
|
100
|
15
|
1450
|
7.5
|
68
|
225
|
690
|
420
|
420
|
825
|
GAK-100
|
|
100-80-20-7.5
|
100
|
80
|
20
|
1450
|
7.5
|
65
|
225
|
690
|
420
|
420
|
825
|
GAK-100
|
|
100-100-25-11
|
100
|
100
|
25
|
1450
|
11
|
70
|
225
|
690
|
450
|
520
|
940
|
GAK-100
|
|
100-100-30-15
|
100
|
100
|
30
|
1450
|
15
|
65
|
GAK-100
|
|||||
|
100-100-35-18.5
|
100
|
100
|
35
|
1450
|
18.5
|
68
|
225
|
680
|
410
|
420
|
970
|
GAK-100
|
|
125-130-15-11
|
125
|
130
|
15
|
1450
|
11
|
72
|
GAK-125
|
|||||
|
125-130-20-15
|
125
|
130
|
20
|
1450
|
15
|
75
|
GAK-125
|
|||||
|
150-145-9-7.5
|
150
|
145
|
9
|
1450
|
7.5
|
76
|
225
|
800
|
510
|
420
|
795
|
GAK-150
|
|
150-180-15-15
|
150
|
180
|
15
|
1450
|
15
|
69
|
275
|
950
|
610
|
520
|
1060
|
GAK-150
|
|
150-180-20-18.5
|
150
|
180
|
20
|
1450
|
18.5
|
72
|
250
|
925
|
858
|
520
|
1060
|
GAK-150
|
|
150-180-25-22
|
150
|
180
|
25
|
1450
|
22
|
78
|
260
|
925
|
585
|
520
|
1060
|
GAK-150
|
|
150-130-30-22
|
150
|
130
|
30
|
1450
|
22
|
78
|
260
|
925
|
585
|
520
|
1060
|
GAK-150
|
|
150-180-30-30
|
150
|
180
|
30
|
1450
|
30
|
78
|
GAK-150
|
|||||
|
150-200-30-37
|
150
|
200
|
30
|
1450
|
37
|
73
|
275
|
1025
|
650
|
520
|
1320
|
GAK-150
|
|
200-300-7-11
|
200
|
300
|
7
|
980
|
11
|
66
|
290
|
990
|
610
|
520
|
1150
|
GAK-200
|
|
200-250-11-15
|
200
|
250
|
11
|
1450
|
15
|
64
|
270
|
970
|
600
|
520
|
1120
|
GAK-200
|
|
200-250-15-18.5
|
200
|
250
|
15
|
1450
|
18.5
|
73
|
290
|
1130
|
715
|
520
|
1130
|
GAK-200
|
|
200-400-10-22
|
200
|
400
|
10
|
1450
|
22
|
75
|
275
|
1120
|
710
|
520
|
1130
|
GAK-200
|
|
200-400-13-30
|
200
|
400
|
13
|
14501
|
30
|
76
|
275
|
1120
|
710
|
520
|
1320
|
GAK-200
|
|
200-300-15-22
|
200
|
300
|
15
|
1450
|
22
|
76
|
275
|
1120
|
710
|
520
|
1130
|
GAK-200
|
|
200-250-22-30
|
200
|
250
|
22
|
1450
|
30
|
71
|
275
|
1120
|
710
|
520
|
1290
|
GAK-200
|
|
200-350-25-37
|
200
|
350
|
25
|
1450
|
37
|
71
|
325
|
1080
|
680
|
520
|
1370
|
GAK-200
|
|
200-400-30-45
|
200
|
400
|
30
|
1450
|
45
|
74
|
330
|
1250
|
780
|
520
|
1370
|
GAK-200
|
|
Model
|
Port Size
|
Flow Rate
|
Head
|
Speed
|
Power
|
Efficiency
|
A
|
B
|
C
|
D
|
H
|
Auto Coupler
|
|
mm
|
(m3/h)
|
(M)
|
(r/min)
|
(kw)
|
(%)
|
|||||||
|
250-600-9-30
|
250
|
600
|
9
|
980
|
30
|
78
|
440
|
1100
|
700
|
520
|
1660
|
GAK-250
|
|
250-600-12-37
|
250
|
600
|
12
|
1450
|
37
|
76
|
440
|
1100
|
700
|
520
|
1660
|
GAK-250
|
|
250-600-15-45
|
250
|
600
|
15
|
1450
|
45
|
73
|
440
|
1100
|
700
|
520
|
1660
|
GAK-250
|
|
250-600-20-55
|
250
|
600
|
20
|
1450
|
55
|
73
|
440
|
1100
|
700
|
520
|
1700
|
GAK-250
|
|
250-600-25-75
|
250
|
600
|
25
|
1450
|
75
|
71
|
440
|
1100
|
700
|
520
|
1750
|
GAK-250
|
|
300-800-12-45
|
300
|
800
|
12
|
980
|
45
|
74
|
470
|
1305
|
850
|
650
|
1845
|
GAK-300
|
|
300-480-15-45
|
300
|
480
|
15
|
1450
|
45
|
66
|
470
|
1305
|
850
|
650
|
1845
|
GAK-300
|
|
300-800-15-55
|
300
|
800
|
15
|
1450
|
55
|
73
|
470
|
1305
|
850
|
650
|
2060
|
GAK-300
|
|
300-600-20-55
|
300
|
600
|
20
|
1450
|
55
|
73
|
470
|
1305
|
850
|
650
|
2060
|
GAK-300
|
|
300-800-20-75
|
300
|
800
|
20
|
1450
|
75
|
75
|
470
|
1305
|
850
|
650
|
2120
|
GAK-300
|
|
300-950-20-90
|
300
|
950
|
20
|
1450
|
90
|
76
|
470
|
1305
|
850
|
650
|
2120
|
GAK-300
|
|
300-1000-25-110
|
300
|
1000
|
25
|
1450
|
110
|
76
|
500
|
1350
|
875
|
650
|
2220
|
GAK-300
|
|
300-1100-10-55
|
300
|
1100
|
10
|
1450
|
55
|
73
|
GAK-300
|
|||||
|
350-1500-15-90
|
350
|
1500
|
15
|
740
|
90
|
87
|
630
|
1533
|
1280
|
700
|
2190
|
GAK-350
|
|
350-1200-18-90
|
350
|
1200
|
18
|
980
|
90
|
85
|
500
|
900
|
500
|
750
|
2190
|
GAK-350
|
|
350-1100-28-132
|
350
|
1100
|
28
|
980
|
132
|
84
|
700
|
1616
|
1363
|
700
|
2480
|
GAK-350
|
|
350-1000-36-160
|
350
|
1000
|
36
|
980
|
160
|
84
|
700
|
1666
|
1413
|
700
|
2590
|
GAK-350
|
|
400-1760-7.5-55
|
400
|
1760
|
7.5
|
980
|
55
|
83
|
GAK-400
|
|||||
|
400-1500-10-75
|
400
|
1500
|
10
|
980
|
75
|
86
|
600
|
1650
|
1365
|
780
|
2000
|
GAK-400
|
|
400-2000-13-110
|
400
|
2000
|
13
|
980
|
110
|
84
|
600
|
1650
|
1365
|
780
|
2280
|
GAK-400
|
|
400-2000-15-132
|
400
|
2000
|
15
|
980
|
132
|
83
|
GAK-400
|
|||||
|
400-1700-22-160
|
400
|
1700
|
22
|
980
|
160
|
83
|
630
|
1670
|
1380
|
780
|
2600
|
GAK-400
|
|
400-1500-26-160
|
400
|
1500
|
26
|
980
|
160
|
84
|
630
|
1670
|
1380
|
780
|
2600
|
GAK-400
|
|
Model
|
Port Size
|
Flow Rate
|
Head
|
Speed
|
Power
|
Efficiency
|
A
|
B
|
C
|
D
|
H
|
Auto Coupler
|
|
mm
|
(m3/h)
|
(M)
|
(r/min)
|
(kw)
|
(%)
|
|||||||
|
400-1800-32-250
|
400
|
1800
|
32
|
980
|
250
|
82
|
670
|
1730
|
1440
|
780
|
2850
|
GAK-400
|
|
500-2500-10-110
|
500
|
2500
|
10
|
740
|
110
|
85
|
900
|
2218
|
1875
|
900
|
2250
|
GAK-500
|
|
500-2600-15-160
|
500
|
2600
|
15
|
740
|
160
|
84
|
955
|
1968
|
1625
|
900
|
2450
|
GAK-500
|
|
500-2400-22-220
|
500
|
2400
|
22
|
740
|
220
|
85
|
900
|
2218
|
1875
|
900
|
2520
|
GAK-500
|
|
500-2650-24-250
|
500
|
2650
|
24
|
740
|
250
|
85
|
1017
|
2198
|
2395
|
900
|
3000
|
GAK-500
|
OEM & Custom
Chaodun Pump offers OEM/ODM customization for WQ/QW series, including voltage, material, flow customization, and export packaging. Logo printing and documentation customization available for global distributors.
FAQs
1. What is the WQ/QW submersible pump used for?
It is designed for sewage, slurry, and wastewater discharge in municipal, industrial, and agricultural systems.
2. Can it handle solids and fibers?
Yes, the impeller allows fibers 5× inlet size and solids up to 50% outlet diameter.
3. What’s the max temperature for operation?
Up to 60°C for normal models.
4. Can it operate dry?
No, dry running is prohibited to prevent motor damage.
5. Is stainless steel version available?
Yes, 1Cr18Ni9Ti stainless steel available for mild corrosive liquids.
6. What installation options exist?
Fixed coupling installation or portable mobile type.
7. Does Chaodun Pump offer export OEM service?
Yes, full OEM/ODM customization for international buyers.