Product Description
Model Code Explanation
Product Introduction
The CYZ-A horizontal self-priming oil pump is a pump product developed after digesting, absorbing, and improving relevant technical information. This pump is ideal for the petroleum industry, land oil depots, and oil tank trucks, and it is also suitable for use as a ship cargo oil pump, bilge pump, fire pump, ballast system, and machinery cooling water circulation pump. It is used for transporting petroleum products such as gasoline, kerosene, diesel, aviation fuel, and seawater or fresh water with a temperature range of -20°C to 80°C. For transporting chemical liquids, a corrosion-resistant mechanical seal can be used.
Product Features
1. The CYZ-A horizontal self-priming oil pump is a self-priming centrifugal pump with a simple structure, easy operation, stable performance, easy maintenance, high efficiency, long service life, and strong self-priming ability. The pipeline does not require a foot valve, and only a certain amount of oil needs to be stored in the pump body before operation. When used on oil tankers or water transport vessels, it can also serve as a bilge pump with good bilge cleaning performance.
2. The CYZ-A horizontal self-priming oil pump is made from high-quality materials and features a hard alloy mechanical seal, making it durable. The discharge pipeline does not require a safety valve, and the suction pipeline does not require a foot valve, thus simplifying the pipeline system and improving working conditions.
Working Principle and Structure Description
The CYZ-A horizontal self-priming oil pump uses an axial liquid return pump body structure. The pump body consists of the intake chamber, liquid storage chamber, volute chamber, return liquid hole, and gas-liquid separation chamber. After the pump starts normally, the impeller draws in the liquid stored in the intake chamber and the air from the suction pipeline. These are fully mixed in the impeller, and under the action of centrifugal force, the liquid, along with gas, flows toward the outer edge of the volute chamber, forming a white foam belt with a certain thickness and a high-speed rotating liquid ring at the impeller’s outer edge. The gas-liquid mixture passes through the diffusion tube into the gas-liquid separation chamber. At this point, the flow velocity suddenly decreases, and lighter gases are separated from the mixture. The gas is expelled through the pump body outlet. The degassed liquid returns to the liquid storage chamber and flows back into the impeller via the return hole, mixing again with the gas drawn in from the intake pipe. Under the action of the high-speed rotating impeller, the liquid flows back toward the outer edge of the impeller. This process continues in cycles until all the air in the intake pipeline is removed, completing the self-priming process and allowing the pump to start normal operation.
Some pumps have a cooling chamber at the bottom of the bearing housing. When the bearing temperature exceeds 70°C, cooling fluid can be injected into the cooling chamber through any cooling fluid connection to provide circulation cooling. The pump uses front and rear sealing rings to prevent liquid from leaking from high-pressure areas to low-pressure areas. The front sealing ring is installed in the pump body, and the rear sealing ring is installed in the bearing housing. When the sealing rings wear out after long-term operation, affecting the pump’s efficiency and self-priming performance, they should be replaced
Structural Diagram
|
1
|
Coupling
|
2
|
Pump Shaft
|
3
|
Bearing
|
4
|
Mechanical Seal
|
5
|
Bearing Housing
|
6
|
Pump Shell
|
7
|
Discharge Seat
|
|
8
|
Suction Seat
|
9
|
Front Sealing Ring
|
10
|
Impeller
|
11
|
Rear Cover
|
12
|
Water Ring
|
13
|
Liquid Injection Hole
|
14
|
Return Liquid Hole
|
Performance Parameters
|
Model
|
Flow Rate (m³/h)
|
Head (m)
|
Efficiency (%)
|
Speed (rpm)
|
Motor Power (kW)
|
Diameter
|
||
|
(m3/h)
|
(l/s)
|
(m)
|
(%)
|
(r/min)
|
(KW)
|
suction
|
discharge
|
|
|
25CYZ-A-20
|
3.2
|
0.9
|
20
|
6.5
|
2900
|
0.75
|
25
|
25
|
|
25CYZ-A-32
|
3.2
|
0.9
|
32
|
6.5
|
2900
|
1.1
|
25
|
25
|
|
40CYZ-A-20
|
6.3
|
1.8
|
20
|
6.5
|
2900
|
1.1
|
40
|
32
|
|
40CYZ-A-40
|
10
|
2.8
|
40
|
6.5
|
2900
|
4
|
50
|
40
|
|
50CYZ-A-12
|
15
|
4.2
|
12
|
6.5
|
2900
|
1.6
|
50
|
50
|
|
50CYZ-A-20
|
18
|
5
|
20
|
6.5
|
2900
|
2.2
|
50
|
50
|
|
50CYZ-A-30
|
20
|
5.5
|
30
|
6.5
|
2900
|
4
|
50
|
50
|
|
50CYZ-A-40
|
10
|
2.8
|
40
|
6.5
|
2900
|
4
|
50
|
50
|
|
50CYZ-A-50
|
12.5
|
3.5
|
50
|
6.5
|
2900
|
5.5
|
50
|
50
|
|
50CYZ-A-60
|
15
|
4.2
|
60
|
6.5
|
2900
|
7.5
|
50
|
50
|
|
50CYZ-A-75
|
20
|
5.6
|
75
|
6.5
|
2900
|
11
|
50
|
50
|
|
65CYZ-A-15
|
30
|
8.3
|
15
|
6.5
|
2900
|
3
|
65
|
50
|
|
65CYZ-A-32
|
25
|
6.9
|
32
|
6.5
|
2900
|
5.5
|
65
|
50
|
|
80CYZ-A-13
|
35
|
9.7
|
13
|
6
|
2900
|
3
|
80
|
65
|
|
80CYZ-A-17
|
43
|
12
|
17
|
6
|
2900
|
4
|
80
|
65
|
|
80CYZ-A-22
|
40
|
11.1
|
22
|
6
|
2900
|
5.5
|
80
|
65
|
|
80CYZ-A-25
|
50
|
13.9
|
25
|
6
|
2900
|
7.5
|
80
|
80
|
|
80CYZ-A-32
|
50
|
13.9
|
32
|
6
|
2900
|
7.5
|
80
|
80
|
|
80CYZ-A-55
|
60
|
16.7
|
55
|
6
|
2900
|
18.5
|
80
|
80
|
|
80CYZ-A-70
|
60
|
16.7
|
70
|
6
|
2900
|
22
|
80
|
80
|
|
100CYZ-A-20
|
100
|
27.8
|
20
|
6
|
2900
|
11
|
100
|
80
|
|
100CYZ-A-40
|
100
|
27.8
|
40
|
6
|
2900
|
22
|
100
|
100
|
|
100CYZ-A-40A
|
100
|
27.8
|
40
|
6
|
2900
|
22
|
100
|
100
|
|
10065CYZ-A-65
|
100
|
27.8
|
65
|
6
|
2900
|
30
|
100
|
100
|
|
100CYZ-A-75
|
70
|
19.4
|
75
|
6
|
2900
|
30
|
100
|
100
|
|
150CYZ-A-45
|
170
|
47.2
|
45
|
5
|
2900
|
37
|
150
|
100
|
|
150CYZ-A-55
|
170
|
47.2
|
55
|
5
|
2900
|
45
|
150
|
100
|
|
150CYZ-A-65
|
170
|
47.2
|
65
|
5
|
2900
|
55
|
150
|
100
|
|
150CYZ-A-80
|
160
|
44.4
|
80
|
5
|
2900
|
55
|
150
|
100
|
|
200CYZ-A-63
|
280
|
77.8
|
63
|
5
|
1450
|
90
|
200
|
150
|
|
250CYZ-A-50
|
400
|
111.1
|
50
|
5
|
1450
|
90
|
250
|
200
|
|
300CYZ-A-50
|
500
|
138.9
|
50
|
5
|
1450
|
110
|
300
|
250
|
performance curve
pump installation
|
1
|
Pump
|
|
|
2
|
Pressure Gauge
|
|
|
3
|
Discharge Vertical Pipe
|
|
|
4
|
Suction Hard Pipe
|
|
|
5
|
Elbow
|
|
|
6
|
Flow Control Valve
|
|
|
7
|
Discharge Pipeline
|
|
|
8
|
Liquid Filling Plug
|
|
|
9
|
Vacuum Gauge
|
|
| 1. When the pump and electric motor are directly coupled, ensure the coaxial alignment of the pump shaft and motor output. The accuracy of the pump installation significantly affects the pump’s stability and service life, so installation and alignment must be performed with care.
2. The pump coupling must be securely fastened with nuts and locked in place to prevent loosening. If the nuts loosen, it may cause the impeller to move, resulting in mechanical failure. 3. To maintain a certain amount of stored liquid in the pump and prevent dry friction of the mechanical seal, ensure that the pump inlet is above the centerline of the pump shaft. 4. When installing the suction pipeline, note the following:
5. During the installation of the self-priming pump, ensure the static grounding resistance of the pump and pipeline meets the required specifications. 6. Carefully check the pump casing and pipeline for any debris such as stones or iron filings during installation. 7. Correct the installation gap and coaxial alignment of the pump coupling and motor coupling. The allowable deviation in misalignment is 0.1 mm. Adjust the height difference between the pump shaft and the motor shaft by adding copper or iron shims under the base. 8. After 3-4 hours of operation, perform a final check. If no abnormal phenomena occur, the installation can be considered satisfactory. During trial operation, check the bearing temperature, which should not exceed 70°C. 9. If the pump bearing housing has a cooling chamber, a cooling water connection should be provided with an internal diameter of 12 for the hose or plastic pipe, with a thread size of M12x1.25. 10. If a check valve is installed in the pump’s discharge pipeline and it prevents the pump from discharging gas smoothly during self-priming, a small vent pipe and valve should be added at the pump’s outlet. |
||
Usage
(1) Preparation and inspection before startup:
- 1. For this series of self-priming pumps, high-quality calcium-based grease and No. 10 motor oil are used for lubrication based on the operating conditions of the pump. If grease is used, the bearing housing should be periodically greased. If motor oil is used, ensure that the oil level is sufficient.
- 2. Check whether the liquid level in the pump casing is above the upper edge of the impeller. If it is insufficient, fill the pump casing with liquid through the liquid filling port. Do not start the pump if the liquid level is too low, as this will prevent proper operation and damage the mechanical seal.
- 3. Check whether any rotating parts of the pump are jammed or obstructed.
- 4. Check if the pump’s base and the bolts at each connection are tight.
- 5. Check the alignment and parallelism between the pump shaft and the motor shaft.
- 6. Check for air leaks in the suction pipeline. If there are any leaks, they must be corrected.
- 7. Open the suction valve and slightly open (not fully open) the discharge control valve.
(2) Startup and Operation:
- 1. Start the self-priming pump briefly and check if the pump shaft rotates in the correct direction.
- 2. Pay attention to abnormal sounds or vibrations during rotation.
- 3. Monitor the pressure and vacuum gauge readings. After a period of fluctuation, when the readings stabilize, it indicates that the pump is primed and ready for normal fluid transfer.
- 4. Before the pump starts normal fluid transfer, closely monitor the temperature inside the pump during the priming process. If the temperature rises too much during the priming process, stop the pump to investigate the cause.
- 5. If the temperature of the liquid in the pump becomes too high and causes difficulty in self-priming, temporarily stop the pump. You can use the liquid in the discharge pipeline to flow back into the pump or directly add liquid through the liquid filling port to lower the temperature, then restart the pump.
- 6. If the pump experiences strong vibration and noise during operation, it may be due to cavitation. Two causes for cavitation are: (1) excessive flow rate in the suction pipe; (2) excessive suction lift. If the flow rate is too high, adjust the discharge control valve and increase the pressure gauge reading. If there is a blockage in the suction line, clear it immediately; if the suction lift is too high, reduce the installation height of the pump.
- 7. If the pump is stopped during operation, when restarting, slightly open (do not close fully) the discharge control valve. This helps to ensure that the air can be expelled from the discharge port during the self-priming process and also allows the pump to start under a lighter load.
- 8. Check the pipeline system for any leaks.
(3) Stopping the Pump:
- 1. First, close the discharge pipeline valve.
- 2. Allow the pump to stop rotating.
- 3. During cold weather, drain the stored liquid in the pump casing and the water in the bearing housing cooling chamber to prevent freezing and damage to the components.
Pressure Control Range Chart for Pumping Various Liquids
|
Pump Model and Fluid Type
|
water
|
gasoline-powered pump
|
kerosene
|
diesel
|
|
25CYZ-A-20
|
0.13-0.23
|
0.09-0.15
|
0.10-0.18
|
0.10-0.19
|
|
25CYZ-A-32
|
0.28-0.38
|
0.20-O.27
|
0.21-0.29
|
0.23-0.32
|
|
40CYZ-A-20
|
0.15-0.25
|
0.11-O.18
|
0.12-0.20
|
0.12-0.2l
|
|
40CYZ-A-40
|
0.33-O.41
|
0.24-0.30
|
0.26-0.33
|
0.28-0.35
|
|
50CYZ-A-12
|
0.10-0.15
|
0.07-0.11
|
0.08-O.12
|
0.08-0.13
|
|
50CYZ-A-20
|
0.15-O.25
|
0.11-0.18
|
0.12-0.20
|
0.12-0.21
|
|
50CYZ-A-30
|
0.29-0.39
|
0.21-0.28
|
0.22-O.30
|
0.24-0.33
|
|
50CYZ-A-35
|
0.30-0.40
|
0.22-0.29
|
0.23-0.31
|
0.25-0.33
|
|
50CYZ-A-40
|
0.33-0.41
|
0.24-0.30
|
0.26-O.33
|
0.28-O.35
|
|
50CYZ-A-50
|
0.45-0.64
|
O.33-0.47
|
0.36-0.46
|
0.38-0.49
|
|
50CYZ-A-60
|
0.55-0.65
|
0.40-0.47
|
0.48-0.60
|
0.47-0.55
|
|
50CYZ-A-75
|
0.72-0.78
|
0.53-O.57
|
0.58-0.62
|
0.61-0.66
|
|
65CYZ-A-15
|
0.12-0.20
|
0.09-O.13
|
0.09-0.14
|
0.10-0.15
|
|
65CYZ-A-32
|
0.29-0.39
|
0.21-0.28
|
0.22-O.30
|
0.24-0.33
|
|
80CYZ-A-13
|
0.10-0.15
|
0.07-0.11
|
0.08-0.12
|
0.08-0.13
|
|
80CYZ-A-17
|
0.13-0.21
|
0.09-0.15
|
0.10-O.17
|
0.11-O.18
|
|
80CYZ-A-22
|
0.19-0.26
|
0.13-0.20
|
0.14-0.21
|
0.14-0.22
|
|
80CYZ-A-25
|
0.21-0.28
|
O.15-0.20
|
0.17-0.22
|
0.18-0.24
|
|
80CYZ-A-32
|
0.28-0.36
|
0.20-O.26
|
0.22-0.29
|
0.24-0.31
|
|
80CYZ-A-55
|
0.54-0.62
|
0.39-O.45
|
0.43-0.50
|
0.46-0.53
|
|
80CYZ-A-70
|
0.66-0.76
|
0.48-0.55
|
0.53-0.61
|
0.56-0.65
|
|
100CYZ-A-20
|
0.18-0.28
|
0.14-0.22
|
0.15-O.23
|
O.15-0.24
|
|
100CYZ-A-40
|
0.37-0.49
|
0.27-0.36
|
0.30-O.39
|
0.31-0.39
|
|
100CYZ-A-40A
|
0.35-0.46
|
0.26-0.34
|
0.28-0.37
|
0.30-O.39
|
|
100CYZ-A-65
|
0.60-0.68
|
0.44-0.50
|
0.48-0.54
|
0.51-0.58
|
|
100CYZ-A-75
|
0.72-0.78
|
0.53-0.57
|
0.58-O.63
|
0.61-0.66
|
|
150CYZ-A-55
|
0.52-0.58
|
0.38-0.42
|
0.42-0.46
|
0.44-0.49
|
|
150CYZ-A-65
|
0.60-0.66
|
0.44-0.48
|
0.48-0.53
|
0.51-0.56
|
|
150CYZ-A-80
|
0.72-0.77
|
0.53-0.56
|
0.56-O.62
|
0.61-0.65
|
|
200CYZ-A-63
|
0.63-0.69
|
0.45-O.5l
|
0.51-O.53
|
0.53-0.58
|
|
250CYZ-A-50
|
0.45-0.60
|
0.33-0.44
|
0.36-0.46
|
0.38-O.49
|
Maintenance and Care
This pump features a simple and reliable structure, designed for durability. Under normal operating conditions, frequent disassembly for maintenance is not necessary. Only address any faults as they arise.
1. Key Areas to Focus on During Maintenance:
- A. Rolling Bearings: When the pump has been in operation for an extended period, and the bearings show significant wear, they should be replaced.
- B. Front and Rear Sealing Rings: These should be replaced when they show significant wear.
- C. Mechanical Seal: As long as the mechanical seal is not leaking, it should not be disassembled for inspection. If there is severe leakage at the lower end of the bearing housing, the mechanical seal should be disassembled for inspection. Handle the mechanical seal carefully during disassembly and reassembly, ensuring the sealing surfaces are clean. Protect the mirror surfaces of the static and dynamic rings, and avoid any impact. Leakage from the mechanical seal is typically due to wear of the sealing faces. To repair, polish the friction faces to restore the mirror finish. Another potential cause of leakage is improper installation or deformation of the “O” ring (or buffer gasket), which may require adjustment or replacement.
2. Pump Disassembly Sequence:
- A. Remove the motor or disengage the coupling.
- B. Remove the bearing assembly and check the radial clearance between the impeller and the front ring. Also, check if the impeller nut is loose.
- C. Loosen the impeller nut, remove the impeller, and check the radial clearance between the impeller and the rear sealing ring.
- D. Loosen the set screws on the mechanical seal, remove the dynamic ring part of the mechanical seal, check the face seal between the static and dynamic rings, and inspect the condition of the “O” ring (or buffer gasket).
- E. Remove the set screw of the coupling and pull out the coupling.
- F. Remove the bearing cover and remove the pump shaft’s bearing.
- G. Reassembly should be done in reverse order.
OEM & Custom Solutions
We offer OEM branding, special seals for chemical liquids, custom inlet/outlet flanges, enhanced materials, marine-grade construction, tailored voltage motors, fuel-specific configurations, and export packing solutions.
FAQs for Overseas Buyers
1. What liquids can the CYZ-A pump transfer?
Gasoline, kerosene, diesel, jet fuel, sea water, clean water, and chemical liquids with special seals.
2. Does the pump require a bottom valve?
No. The CYZ-A pump has strong self-priming capability and does not need a bottom valve.
3. What is the temperature range of the working medium?
The pump is suitable for -20°C to 80°C as shown in the PDF.
4. Can the CYZ-A pump be used on ships?
Yes, it is ideal for cargo oil, bilge pumping, firefighting, and cooling systems.
5. What should be checked before starting?
Priming liquid level, lubrication, shaft alignment, suction pipeline sealing, and valve positions.
6. What causes insufficient flow?
Clogged impeller or pipe, worn seals, insufficient power, or low rotational speed.
7. Is OEM customization available?
Yes, including materials, mechanical seals, flange standards, and motor options.