CYZ Series Self-Priming Fuel & Oil Pump
A horizontal self-priming centrifugal oil pump for petroleum products, covering 3.2-600 m³/h at heads of 12-80 m with a 5-6.5 m suction lift and media temperatures from -20°C to 80°C.
The CYZ series is a horizontal self-priming centrifugal pump built for petroleum products such as gasoline, kerosene, diesel oil and aviation kerosene, and it can also move seawater and fresh water. Published coverage is 3.2-600 m³/h at heads of 12-80 m, with a suction lift of 5-6.5 m and an oil temperature range from -20°C to 80°C. Self-priming comes from the pump's own suction chamber, liquid reservoir, spiral chamber and gas-liquid separation chamber, so it starts without external priming equipment. It is widely used as a cargo oil pump, bilge pump, fire pump or ballast pump on ships, and in land oil depots, tanker trucks and petroleum plants. The seals are carbide mechanical seals and the discharge line needs no safety valve and the suction line no bottom valve, which keeps the pipework simple.
| Parameter | Specification |
| Flow rate | 3.2-600 m³/h |
| Head | 12-80 m |
| Suction lift | 5-6.5 m |
| Medium temperature | -20°C to 80°C |
| Pump type | Horizontal self-priming centrifugal oil pump |
| Speed | 2900 r/min (published models) |
| Shaft seal | Carbide mechanical seal |
| Port range | 25-100 mm inlet, 25-100 mm outlet (published models) |
| Piping | No safety valve on the discharge line, no bottom valve on the suction line |
The table lists published CYZ models with flow, head, self-priming height, power, port sizes and speed. Confirm the medium and its temperature when selecting the seal and materials.
| Model | Flow (m³/h) | Head (m) | Self-priming (m) | Power (kW) | Inlet (mm) | Outlet (mm) | Speed (r/min) |
| 25CYZ-20 | 3.2 | 20 | 6.5 | 0.75 | 25 | 25 | 2900 |
| 25CYZ-32 | 3.2 | 32 | 6.5 | 1.1 | 25 | 25 | 2900 |
| 40CYZ-20 | 6.3 | 20 | 6.5 | 1.1 | 40 | 32 | 2900 |
| 40CYZ-40 | 10 | 40 | 6.5 | 4 | 50 | 40 | 2900 |
| 50CYZ-12 | 15 | 12 | 6.5 | 1.5 | 50 | 50 | 2900 |
| 50CYZ-20 | 18 | 20 | 6.5 | 2.2 | 50 | 50 | 2900 |
| 50CYZ-35 | 14 | 35 | 6.5 | 4 | 50 | 50 | 2900 |
| 50CYZ-40 | 10 | 40 | 6.5 | 4 | 50 | 50 | 2900 |
| 50CYZ-50 | 12.5 | 50 | 6.5 | 5.5 | 50 | 50 | 2900 |
| 50CYZ-60 | 15 | 60 | 6.5 | 7.5 | 50 | 50 | 2900 |
| 50CYZ-75 | 20 | 75 | 6.5 | 11 | 50 | 50 | 2900 |
| 65CYZ-15 | 30 | 15 | 6.5 | 3 | 65 | 50 | 2900 |
| 65CYZ-32 | 25 | 32 | 6 | 5.5 | 65 | 50 | 2900 |
| 80CYZ-13 | 35 | 13 | 6 | 3 | 80 | 65 | 2900 |
| 80CYZ-17 | 43 | 17 | 6 | 4 | 80 | 65 | 2900 |
| 80CYZ-22 | 40 | 22 | 6 | 5.5 | 80 | 65 | 2900 |
| 80CYZ-25 | 50 | 25 | 6 | 7.5 | 80 | 80 | 2900 |
| 80CYZ-70 | 60 | 70 | 6 | 22 | 80 | 80 | 2900 |
| 100CYZ-20 | 100 | 20 | 6 | 11 | 100 | 80 | 2900 |
| 100CYZ-40 | 100 | 40 | 6 | 22 | 100 | 100 | 2900 |
| Item | Detail |
| Shaft seal | Carbide mechanical seal, durable against oil-based media |
| Construction | Suction chamber, liquid reservoir, spiral chamber, liquid return port and gas-liquid separation chamber |
| Drive | Coupled electric motor on a common baseplate |
| Piping options | No safety valve is required on the discharge line and no bottom valve on the suction line |
| Materials | High-quality materials selected for petroleum product service - state the medium so the correct build is confirmed |
| Shipboard options | Also used as a compartment cleaning pump and as a shipboard water supply unit |
- Cargo oil transfer: Loads and discharges petroleum products on tankers and barges.
- Bilge and ballast duty: Empties bilges and moves ballast water on ships.
- Land oil depots: Transfers fuel between storage tanks, road tankers and dispensing points.
- Tanker trucks: Mounted on vehicles for fuel delivery and field refuelling.
- Petroleum and chemical plants: Moves diesel, kerosene and similar light oils in process areas.
- Fire and wash-down service: Doubles as a fire pump or tank cleaning pump on board.
- Confirm the liquid is a petroleum product free of solid particles, because the series is intended for clean oils rather than slurries.
- Keep the medium temperature inside the published -20°C to 80°C window and check the flash point requirements of your site.
- Choose the model from flow and head, then verify the 5-6.5 m self-priming height against the tank or bilge depth.
- Check the port sizes against existing pipework, since the series uses different inlet and outlet diameters on some models.
- State whether the pump is for land or marine use, so the mounting and connection arrangement can be matched.
What makes the CYZ pump self-priming?
The casing contains a suction chamber, liquid reservoir, spiral chamber and gas-liquid separation chamber. The gas-liquid mixture separates inside the pump, gas leaves and liquid returns to the reservoir, so the pump re-primes itself without outside help.
Can the CYZ series handle oil at high temperature?
The published medium range is -20°C to 80°C, and the supplier states suitability for oils not exceeding 80°C. For hotter liquids choose a pump rated for the higher temperature.
Why is no bottom valve needed on a CYZ pump?
Self-priming is built into the casing, and the discharge line needs no safety valve, so the suction line can be kept simple with no bottom valve fitted.
What liquids does the CYZ pump handle?
Gasoline, kerosene, diesel oil, aviation kerosene and similar petroleum products, plus seawater and fresh water, at temperatures from -20°C to 80°C.
What is the flow and head range of the CYZ series?
The series covers 3.2-600 m³/h at heads of 12-80 m, with a self-priming height of 5-6.5 m.
Which seal does the CYZ oil pump use?
A carbide mechanical seal, chosen so the pump keeps running without leakage on oil-based media.
Does the CYZ pump need a foot valve or safety valve?
No. The suction line needs no bottom valve and the discharge line needs no safety valve, because the pump primes itself from its own reservoir.
Can the CYZ pump be used on board a ship?
Yes. It is used as a cargo oil pump, bilge pump, ballast pump and fire pump on vessels, as well as in land oil depots and tanker trucks.
Related Products
- ZX Series Self-Priming Centrifugal Pump
- IS Series End-Suction Centrifugal Pump
- ZW Series Self-Priming Wastewater Pump
How to Choose the Right CYZ Series Self-Priming Fuel & Oil Pump
Quick answer: The CYZ Series Self-Priming Fuel & Oil Pump covers flow 3.2-600 m³/h, heads of 12-80 m, medium temperatures -20°C to 80°C. Selection starts from the duty point - flow, head, liquid properties and available NPSH - rather than from the catalogue maxima.
Industry Applications
Explore how this equipment can be applied in related industrial sectors and review application-specific selection guidance.