ZW/ZWL Non-Clogging Self-Priming Sewage Pump Industrial

ZW/ZWL Non-Clogging Self-Priming Sewage Pump Industrial

ZW/ZWL Non-Clog Self-Priming Sewage Pump

  • Self-priming sewage pump for municipal, industrial & flood control with flow 10–800 m³/h, head 15–80 m, power 2.2–75 kW
  • No foot valve required: Fast self-priming startup after initial fill
  • Large-passage impeller: Handles solids & long fibers without clogging
  • Oil-chamber mechanical seal: Reliable protection for continuous-duty operation
  • Compact easy-access design: Quick maintenance and parts replacement
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Product Overview

ZW / ZWL Non-Clogging Self-Priming Sewage Pump is a horizontal, non-clogging centrifugal pump with integrated self-priming structure, designed for solid-laden wastewater transfer without external priming systems.

It addresses suction limitation, frequent clogging, and complicated pipeline layouts in sewage systems requiring rapid restart and continuous drainage.

It is suitable for municipal drainage stations, industrial wastewater pits, flood control systems, and underground sump applications where dry-mounted installation is required.

✔ Recommended for systems requiring automatic self-priming capability with solid passage and dry-ground installation.

Model Designation

ZWZWL Non Clogging Self Priming Sewage Pump type 1

Applications

  • Underground sump drainage with intermittent inflow
  • Industrial wastewater transfer containing suspended solids
  • Municipal emergency flood control and stormwater pumping
  • Sewage lift stations without submersible installation conditions
  • Construction site dewatering with solid-laden water

Engineering Advantages

• Integrated self-priming chamber enables automatic suction without foot valve, reducing auxiliary piping complexity

• Non-clogging impeller design improves solid passage capability and reduces blockage risk

• External bearing arrangement prevents contamination from sewage media

• Mechanical seal configuration improves operational reliability under intermittent duty

• Horizontal dry-mounted structure allows convenient inspection and maintenance

✔ Designed for solid-laden wastewater systems requiring reliable self-priming and reduced maintenance frequency.

System Components

ZW / ZWL Non-Clogging Self-Priming Sewage Pump mainly consists of:

  • Self-priming chamber
  • Pump casing
  • Non-clogging impeller
  • Mechanical seal assembly
  • Shaft and shaft sleeve
  • Bearing housing
  • Suction and discharge flanges

Technical Specifications

Service Conditions

  • Suitable for clean or contaminated water containing soft solids and fibers within allowable size limits.
  • Installation site shall be well ventilated and protected from explosive or corrosive atmosphere.
  • Ambient temperature ≤ 40°C.

Operating Conditions

  • Flow rate: 8–800 m³/h
  • Head: 12–80 m
  • Power range: 2.2–55 kW
  • Speed: 1450 / 2900 rpm
  • Liquid temperature: ≤ 80°C
  • Working pressure: ≤ 1.0 MPa

Detailed parameter tables are provided below.

Installation & Dimensions

Outline Drawing

ZWZWL Non Clogging Self Priming Sewage Pump typejiegout
No.
Name
No.
Name
1
Inlet Pipe
9
Impeller
2
Inlet Flange
10
Mechanical Seal
3
Inlet Valve Seat
11
Water Ring
4
Filling Valve
12
Bearing Housing
5
Outlet Pipe
13
Pump Shaft
6
Pump Body
14
Bearing Cover
7
Air–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)
Power (kW)
NPSHr
(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)
Power (kW)
NPSHr
(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

How to Select a Pump Model

• Confirm required suction lift and ensure it is within allowable self-priming range

• Determine maximum solid particle size and select proper impeller passage

• Select rotational speed (1450 rpm preferred for sewage stability)

• Evaluate duty cycle (continuous or intermittent operation)

• Confirm installation height and pipeline layout

✔ Proper model selection ensures stable self-priming performance and minimizes clogging risk.

Engineering Notes

  • Not suitable for hard abrasive solids exceeding design limit
  • Suction piping must remain airtight to maintain self-priming function
  • Check valve is recommended to prevent reverse flow after shutdown
  • Avoid excessive dry running beyond allowable priming time

Compliance & Quality Assurance

  • Hydraulic performance testing before shipment
  • Casing hydrostatic pressure testing
  • Rotor dynamic balance inspection
  • Mechanical seal integrity verification
  • Material traceability documentation

Safety Notice

  • Do not operate under prolonged dry-running condition
  • Ensure suction line is fully sealed before startup
  • Disconnect power before maintenance
  • Do not exceed rated discharge pressure

OEM & Customization

This pump series supports engineered configuration and duty-based matching. Technical adjustments can be made according to system requirements and installation conditions.

Available options include:

  • Motor voltage & frequency
  • Mechanical seal type and configuration
  • Wetted parts material selection
  • Surface coating and corrosion protection

Configuration is determined based on duty point and project specifications.

FAQs

Q: Can the pump operate under VFD control?
A: Yes, within rated hydraulic limits and minimum flow requirements.

Q: What is the maximum allowable suction lift?
A: Depends on model size; refer to performance data for priming capability.

Q: What sealing options are available?
A: Standard mechanical seal; packing seal optional.

Q: What is the allowable solid size?
A: Determined by impeller passage design of each model.

Q: What rotational speeds are available?
A: 1450 rpm and 2900 rpm.

Q: Is the pump suitable for continuous operation?
A: Yes, provided suction sealing and cooling conditions are maintained.