Product Overview
ZX / ZXL Series Self-Priming Centrifugal Pump is a horizontal single-stage self-priming centrifugal pump designed for clean water, wastewater, and liquids containing limited solids.
It eliminates the need for foot valves and external vacuum systems by integrating a self-priming chamber structure, solving frequent priming issues in intermittent operation systems.
It is used in municipal drainage, construction dewatering, agricultural irrigation, and industrial wastewater transfer systems.
Model Designation
Applications
Typical Operating Scenarios
• Municipal wastewater lifting stations
• Construction site pit drainage systems
• Agricultural irrigation and farmland drainage
• Industrial wastewater transfer with intermittent operation
• Emergency flood drainage systems
Engineering Advantages
• Integrated self-priming chamber structure → Automatic air separation and rapid suction recovery after shutdown
• Open or semi-open impeller configuration → Improved handling of liquids containing suspended solids
• Back-pull-out structure design → Maintenance without removing suction and discharge piping
• Horizontal shaft layout with mechanical seal → Stable operation and simplified installation alignment
System Components
ZX / ZXL Series Self-Priming Centrifugal Pump：
• Pump casing with self-priming chamber
• Impeller assembly
• Pump shaft and shaft sleeve
• Mechanical seal assembly
• Bearing housing assembly
• Suction and discharge flanges
• Motor and coupling assembly
Technical Specifications
Service Conditions
• Medium: Clean water, sewage, or liquids containing limited solid particles
• Maximum solid content: ≤ 2% (by volume)
• Installation: Horizontal installation
Operating Conditions
- Flow Rate: 3.2 – 600 m³/h
- Head: 12 – 80 m
- Power Range: 0.75 – 132 kW
- Speed: 1450 / 2900 rpm
- Liquid Temperature: ≤ 80°C
- Working Pressure: ≤ 1.6 MPa
Detailed parameter tables are provided below.
Installation & Dimensions
Outline Drawing
Performance Data
| 1 | Coupling | 2 | Pump Shaft | 3 | Bearing | 4 | Mechanical Seal | 5 | Bearing Housing | 6 | Pump Casing | 7 | Outlet Seat |
| 8 | Inlet Seat | 9 | Front Wear Ring | 10 | Impeller | 11 | Rear Cover | 12 | Water-Blocking Ring | 13 | Filling Port | 14 | Recirculation Port |
Performance Parameters
|
Model
|
Inlet
|
Outlet
|
Suction Lift
|
Motor Power
|
Flow Rate
|
Head
|
|
(mm)
|
(mm)
|
(m)
|
(kW)
|
(L/min)
|
(m)
|
|
|
25ZX3.2-20
|
25
|
25
|
6.5
|
0.75
|
3.2
|
20
|
|
25ZX3.2-32
|
25
|
25
|
6.5
|
1.1
|
3.2
|
32
|
|
40ZX6.3-20
|
40
|
32
|
6.5
|
1.1
|
6.3
|
20
|
|
40ZX10-40
|
40
|
40
|
6.5
|
4
|
10
|
40
|
|
50ZX15-12
|
50
|
50
|
6.5
|
1.5
|
15
|
12
|
|
50ZX18-20
|
50
|
50
|
6.5
|
2.2
|
18
|
20
|
|
50ZX12.5-32
|
50
|
50
|
6.5
|
3
|
12.5
|
32
|
|
50ZX20-30
|
50
|
50
|
6.5
|
4
|
20
|
30
|
|
50ZX14-35
|
50
|
50
|
6.5
|
4
|
14
|
35
|
|
50ZX10-40
|
50
|
50
|
6.5
|
4
|
10
|
40
|
|
50ZX12.5-50
|
50
|
50
|
6.5
|
5.5
|
12.5
|
50
|
|
50ZX15-60
|
50
|
50
|
6.5
|
7.5
|
15
|
60
|
|
50ZX20-75
|
50
|
50
|
6.5
|
11
|
20
|
75
|
|
Model
|
Inlet
|
Outlet
|
Suction Lift
|
Motor Power
|
Flow Rate
|
Head
|
|
(mm)
|
(mm)
|
(m)
|
(kW)
|
(L/min)
|
(m)
|
|
|
65ZX30-15
|
65
|
50
|
6.5
|
3
|
30
|
15
|
|
65ZX25-32
|
65
|
50
|
6
|
5.5
|
25
|
32
|
|
80ZX35-13
|
80
|
80
|
6
|
2.2
|
35
|
13
|
|
80ZX43-17
|
80
|
80
|
6
|
4
|
43
|
17
|
|
80ZX40-22
|
80
|
80
|
6
|
5.5
|
40
|
22
|
|
80ZX50-25
|
80
|
80
|
6
|
7.5
|
50
|
25
|
|
80ZX50-32
|
80
|
80
|
6
|
7.5
|
50
|
32
|
|
80ZX60-55
|
80
|
80
|
6
|
18.5
|
60
|
55
|
|
80ZX60-70
|
80
|
80
|
6
|
22
|
60
|
70
|
|
100ZX100-20
|
100
|
80
|
6
|
11
|
100
|
20
|
|
100ZX100-40
|
100
|
100
|
6
|
18.5
|
100
|
40
|
|
100ZX100-65
|
100
|
100
|
6
|
30
|
100
|
65
|
|
100ZX70-75
|
100
|
100
|
6
|
30
|
70
|
75
|
|
Model
|
Inlet
|
Outlet
|
Suction Lift
|
Motor Power
|
Flow Rate
|
Head
|
|
(mm)
|
(mm)
|
(m)
|
(kW)
|
(L/min)
|
(m)
|
|
|
150ZX170-55
|
150
|
150
|
5
|
45
|
170
|
55
|
|
150ZX170-65
|
150
|
150
|
5
|
55
|
170
|
65
|
|
150ZX160-80
|
150
|
150
|
5
|
55
|
160
|
80
|
|
200ZX400-32
|
200
|
200
|
5
|
55
|
400
|
32
|
|
200ZX280-63
|
200
|
200
|
5
|
90
|
280
|
63
|
|
200ZX350-65
|
200
|
200
|
5
|
110
|
350
|
65
|
|
250ZX550-32
|
250
|
250
|
5
|
75
|
550
|
32
|
|
250ZX400-50
|
250
|
250
|
5
|
90
|
400
|
50
|
|
250ZX450-55
|
250
|
250
|
5
|
110
|
450
|
55
|
|
250ZX400-75
|
250
|
250
|
5
|
132
|
400
|
75
|
|
300ZX600-32
|
300
|
300
|
5
|
90
|
600
|
32
|
|
300ZX500-50
|
300
|
300
|
5
|
110
|
500
|
50
|
|
300ZX550-55
|
300
|
300
|
5
|
132
|
550
|
55
|
How to Select a Pump Model
- Determine required flow rate and discharge head including pipeline losses.
- Verify maximum suction lift does not exceed allowable self-priming height.
- Confirm solid particle size and content fall within allowable range.
- Select rotational speed (1450 rpm or 2900 rpm) based on duty requirement and energy considerations.
- Ensure working pressure class matches system design pressure.
Engineering Notes
• Self-priming performance depends on initial filling of pump casing before first startup.
• Suction pipeline must be airtight to maintain vacuum formation.
• Excessive suction lift may reduce priming efficiency.
• Backflow prevention is recommended for elevated discharge systems.
Compliance & Quality Assurance
• Factory hydraulic performance test
• Casing hydrostatic pressure test
• Impeller dynamic balance inspection
• Seal chamber leakage inspection
• Optional third-party inspection available
Safety Notice
• Do not operate under dry-running condition
• Ensure suction line is airtight before operation
• Do not exceed allowable suction lift
• Disconnect power before maintenance
OEM & Customization
This horizontal self-priming centrifugal 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 configuration
• Wetted parts material selection
• Explosion-proof motor configuration
• Base frame design
Configuration is determined based on duty point and project specifications.
FAQs
Q1: What is the maximum allowable suction lift?
The allowable suction lift depends on model and speed; it must not exceed the specified self-priming height.
Q2: Can the pump handle solid particles?
Yes, within allowable solid content and particle size limits.
Q3: Is VFD control permitted?
Yes, provided minimum flow and priming conditions are maintained.
Q4: What sealing options are available?
Mechanical seal configurations are standard; packing seal is optional.
Q5: What is the maximum working pressure?
Maximum allowable working pressure is ≤ 1.6 MPa.
Q6: Can the pump operate intermittently?
Yes, it is designed for intermittent self-priming operation.
Q7: Is reverse rotation allowed?
Reverse rotation is not permitted.