Product Description
Model Code Explanation
Product Introduction
The ZW Non-Clogging Sewage Self-Priming Pump combines self-priming and non-clogging sewage features in one. With a unique design of the pump casing and impeller flow path, it can operate like a standard self-priming clean water pump without the need for a bottom valve or priming water, while still being capable of sucking and discharging liquids containing large solid particles and long fibrous impurities. It is widely used in municipal sewage projects, river pond breeding, sewage treatment, sedimentation of waste mine impurities, light industry, papermaking, food, chemical, pharmaceutical, power, slurry, and mixed chemical industrial applications.
This pump features a simple structure, good self-priming performance (self-priming height can reach up to 5m), strong sewage discharge capacity, high efficiency, energy-saving, and easy maintenance. It is fully replaceable with WQ and QW submersible sewage pumps, making it an ideal option for the sewage pump market with vast application prospects.
Product Features
- Uses a double-blade impeller structure, significantly improving the ability to pass sewage.
- Mechanical seals use a new type of wear-resistant material and operate continuously in the oil chamber.
- Compact overall structure, small size, low noise, and easy maintenance for user-friendly replacement.
- Automatic control panel that can automatically control the pump’s start and stop according to the required liquid changes, requiring no manual supervision and being extremely convenient to use.
- Can be configured with installation methods based on user needs, providing great convenience for installation and maintenance, without requiring entry into the sewage pit.
- Can operate within the design range without overloading the motor.
Product Applications
The ZW Non-Clogging Sewage Self-Priming Pump is suitable for various industries, including:
- Factory and commercial wastewater discharge, municipal sewage stations, sewage treatment plants, civil defense system drainage stations, water supply equipment for water plants, hospitals, hotels, sewage discharge in urban areas, construction sites, mines, rural biogas tanks, and agricultural irrigation.
- It can pump sewage with particles, sludge, and weakly corrosive media, and can also handle clean water and mildly corrosive substances.
Operating Conditions
- Ambient temperature ≤ 50°C, medium temperature ≤ 80°C (special conditions can reach 200°C).
- Medium pH values: Cast iron material is 6-9, stainless steel is 2-13.
- Medium density should not exceed 1240 kg/m³.
- Self-priming height should not exceed the specified range of 4.5-5.5 meters, with suction pipe length ≤ 10 meters.
- The maximum suspended particle diameter that can be passed is 60% of the pump’s nominal diameter, and the fiber length is 5 times the pump’s nominal diameter.
Structure and Working Principle
The ZW Non-Clogging Sewage Self-Priming Pump mainly consists of the pump body, impeller, rear cover, mechanical seal, pump shaft, bearing housing, inlet valve, gas-liquid separation pipe, water filling valve, and inlet and outlet connections. The structure of the pump is shown in the diagram.
Working Principle: The pump body has a liquid storage chamber, which is connected to the working chamber via a return hole at the top and a circulation hole at the bottom, forming an axial flow external mixing system. After the pump stops working, the pump’s internal chamber stores a certain volume of liquid. When the pump starts, the stored liquid, along with air, is thrown upward by the impeller, and the liquid returns to the working chamber through the gas-liquid separation pipe. The gas is discharged from the pump, creating a certain vacuum inside the pump, achieving the self-priming effect.
Structure Diagram
|
No.
|
Name
|
Serial No.
|
Name
|
|
1
|
Inlet Connection
|
9
|
Impeller
|
|
2
|
Inlet Flange
|
10
|
Mechanical Seal
|
|
3
|
Inlet Valve Seat
|
11
|
Water Seal
|
|
4
|
Water Filling Valve
|
12
|
Bearing Seat
|
|
5
|
Outlet Connection
|
13
|
Pump Shaft
|
|
6
|
Pump Body
|
14
|
Bearing Cover
|
|
7
|
Gas-Liquid Separation Pipe
|
15
|
Bottom Cover Plate
|
|
8
|
Rear Cover
|
16
|
Bolts
|
Performance Parameters
|
Model
|
Flow Rate (m³/h)
|
Head (m)
|
Motor Power (kW)
|
Speed (rpm)
|
Efficiency (%)
|
NPSHr (m)
|
|
(m3/h)
|
(M)
|
(kw)
|
(r/min)
|
(%)
|
(M)
|
|
|
ZW25-8-15
|
8
|
15
|
2.2
|
2900
|
45
|
2
|
|
ZW32-10-20
|
10
|
20
|
2.2
|
2900
|
45
|
2.5
|
|
ZW40-20-15
|
20
|
15
|
2.2
|
2900
|
45
|
2.5
|
|
ZW40-15-30
|
15
|
30
|
3
|
2900
|
48
|
2.5
|
|
ZW50-10-20
|
10
|
20
|
2.2
|
2900
|
45
|
2.5
|
|
ZW50-20-15
|
20
|
15
|
2.2
|
2900
|
45
|
2.5
|
|
ZW50-18-22
|
18
|
22
|
3
|
2900
|
48
|
2.5
|
|
ZW50-15-30
|
15
|
30
|
3
|
2900
|
48
|
2.5
|
|
ZW65-30-18
|
30
|
18
|
4
|
2900
|
45
|
2.5
|
|
ZW65-20-30
|
20
|
30
|
5.5
|
2900
|
45
|
2.5
|
|
ZW65-25-40
|
25
|
40
|
7.5
|
2900
|
50
|
3
|
|
ZW80-40-16
|
40
|
16
|
4
|
1450
|
50
|
3
|
|
ZW80-65-25
|
65
|
25
|
7.5
|
2900
|
50
|
3
|
|
ZW80-80-35
|
80
|
35
|
15
|
2900
|
45
|
3
|
|
ZW80-50-60
|
50
|
60
|
22
|
2900
|
55
|
3
|
|
ZW80-80-45
|
80
|
45
|
22
|
2900
|
55
|
3
|
|
Model
|
Flow Rate (m³/h)
|
Head (m)
|
Motor Power (kW)
|
Speed (rpm)
|
Efficiency (%)
|
NPSHr (m)
|
|
(m3/h)
|
(M)
|
(kw)
|
(r/min)
|
(%)
|
(M)
|
|
|
ZW100-80-20
|
80
|
20
|
7.5
|
1450
|
53
|
4
|
|
ZW100-100-15
|
100
|
15
|
7.5
|
1450
|
50
|
4
|
|
ZW100-100-20
|
100
|
20
|
11
|
1450
|
53
|
4
|
|
ZW100-100-30
|
100
|
30
|
22
|
2900
|
53
|
4
|
|
ZW100-80-45
|
80
|
45
|
30
|
2900
|
55
|
4
|
|
ZW100-80-60
|
80
|
60
|
37
|
290
|
53
|
4
|
|
ZW100-80-80
|
80
|
80
|
45
|
2900
|
50
|
4
|
|
ZW125-120-20
|
120
|
20
|
15
|
1450
|
55
|
4.5
|
|
ZW150-200-15
|
200
|
15
|
15
|
1450
|
60
|
5
|
|
ZW150-200-20
|
200
|
20
|
22
|
1450
|
60
|
5
|
|
ZW150-200-28
|
200
|
28
|
30
|
1450
|
65
|
5
|
|
ZW150-400-25
|
400
|
25
|
55
|
1450
|
45
|
5
|
|
ZW150-180-40
|
180
|
40
|
55
|
1450
|
65
|
5
|
|
ZW200-280-12
|
280
|
12
|
22
|
1450
|
62
|
5
|
|
ZW200-300-18
|
300
|
18
|
37
|
1450
|
59
|
5
|
|
ZW200-300-25
|
300
|
25
|
45
|
1450
|
55
|
5
|
|
ZW200-280-28
|
280
|
28
|
55
|
1450
|
61
|
5
|
|
ZW250-400-22
|
400
|
22
|
55
|
1450
|
65
|
5
|
|
ZW300-800-14
|
800
|
14
|
55
|
1450
|
61
|
5
|
Preparation Before Starting the Pump
1. Check if the pump base, bearing housing, bearing seat, and other connection points are securely fastened. If any parts are loose, tighten them.
2. Turn the coupling by hand to check for any jamming or unusual noise.
3. Open the water inlet valve on the top of the pump and fill the liquid chamber with water to at least two-thirds of the pump’s volume, then close the valve. No further priming will be required once the pump starts.
4. Connect the power supply and briefly test the rotation. From the motor end, check that the rotation is clockwise (reversing direction is strictly prohibited).
5. Start the pump and observe its operation. If any abnormal phenomena occur, identify and resolve the issue.
OEM & Custom Solutions
Supports OEM/ODM, customized materials, corrosion-resistant structures, voltage customization, flange standards, private label and export packaging solutions.
FAQs for Overseas Buyers
1. Can the pump pass solid particles?
Yes. It handles solids depending on the inlet diameter.
2. Does the pump require a bottom valve?
No. It features true self-priming without bottom valves.
3. Can it handle slurry or fibrous waste?
Yes. Designed for slurry, fibers, and mixed wastewater.
4. What is the allowable medium temperature?
0–80°C under normal operating conditions.
5. Is maintenance complicated?
No. The pump has a simple, robust structure.
6. What is the delivery time?
Usually 7–15 days depending on quantity.
7. Are spare parts available?
Yes. Impellers, seals, plates, shafts and bases are available.