Product Description
Model Code Explanation
Product Overview
The KCB gear oil pump is suitable for transporting various lubricating liquids with a temperature not exceeding 70°C. For higher temperatures up to 200°C, the pump can be equipped with high-temperature materials upon request. It is designed for liquids with viscosities ranging from 5×10-5 to 1.5×10-3 m2/S. The pump is not suitable for transporting corrosive liquids, liquids containing hard particles or fibers, highly volatile, or flashpoint liquids such as gasoline or benzene.
The KCB gear oil pump is widely used in industries such as chemical, petroleum, metallurgy, light industry, synthetic fibers, environmental protection, food, and pharmaceuticals.
Application Description
- The KCB gear oil pump is suitable for transporting various oils such as heavy oil, diesel, and lubricating oil. It can also be equipped with copper gears to transport low flashpoint liquids such as gasoline and benzene. We also produce stainless steel gear pumps for transporting beverages and corrosive liquids.
- The KCB gear oil pump is not suitable for liquids containing hard particles or fibers. It is suitable for liquids with viscosities ranging from 5×10-5 to 1.5×10-3 m2/S. The temperature is typically not higher than 70°C. For high-temperature liquid transport, high-temperature gear pumps are available, capable of handling liquids up to 300°C.
Performance Parameters
|
Model
|
Motor Power (KW)
|
Speed (r/min)
|
Flow (L/min)
|
Discharge Pressure (MPa/cm2)
|
Max Suction Vacuum (m)
|
Inlet/Outlet Diameter
|
|
KCB18.3 (2CY-1.1/14.5-2)
|
1.5
|
1400
|
18.3
|
1.45
|
5
|
3/4″
|
|
KCB33.3 (2CY-2/14.5-2)
|
2.2
|
1420
|
33.3
|
1.45
|
5
|
3/4″
|
|
KCB55 (2CY-3.3/3.3-2)
|
1.5
|
1400
|
55
|
0.33
|
5
|
1″
|
|
KCB55 (2CY-3.3/3.5-2)
|
2.2
|
1420
|
55
|
0.5
|
5
|
1″
|
|
KCB83.3 (2CY-5/3-2)
|
2.2
|
1420
|
83.3
|
0.33
|
5
|
1.5″
|
|
KCB83.3 (2CY-5/5-2)
|
3
|
1420
|
83.3
|
0.5
|
5
|
1.5″
|
|
KCB200 (2CY-8/3.3-2)
|
4
|
1440
|
200
|
0.33
|
5
|
2″
|
|
KCB200 (2CY-12/1.3-2)
|
4
|
1440
|
200
|
0.13
|
5
|
2″
|
|
KCB200 (2CY-12/3.3-2)
|
5.5
|
1440
|
200
|
0.33
|
5
|
2″
|
|
KCB200 (2CY-12/6-2)
|
5.5
|
1440
|
200
|
0.60
|
5
|
2″
|
|
KCB200 (2CY-12/10-2)
|
7.5
|
1440
|
200
|
1.00
|
5
|
2″
|
Working Principle
The KCB gear oil pump is equipped with a pair of rotating gears, one active and one passive. These gears mesh with each other to divide the working chamber of the pump into two separate parts: the suction chamber (A) and the discharge chamber (B). When the pump operates, the active gear drives the passive gear. As the gears disengage, a vacuum is formed in the suction side (A), drawing in liquid. The liquid fills the gear teeth and is transported to the discharge side (B), where it is squeezed out when the gears mesh, generating high-pressure liquid that is discharged from the pump.
Structural Features
1. Structure
- The KCB gear oil pump is a horizontal rotary pump composed of the pump body, gears, bearing housing, safety valve, bearings, and sealing devices.
- The pump body and bearing housing are made of gray cast iron, while the gears are made from high-quality carbon steel. Copper or stainless steel materials can be used upon customer request.
- The bearing housing is equipped with a packing chamber for axial sealing. Models such as 2CY100/3, 2CY120/3, 2CY150/3, and KCB-300~960 series pumps use skeleton seals. The bearings are single-row radial ball bearings.
- The pump is equipped with a safety valve. If the pump or discharge pipeline malfunctions or if the discharge valve is mistakenly closed, causing high pressure, the safety valve will automatically open to release excess pressure and return it to the low-pressure chamber, ensuring the protection of the pump and pipeline.
- The pump is directly connected to the drive motor using an elastic coupling, and installed on a common cast iron base.
2. Characteristics
- The KCB gear oil pump features a simple, compact structure, making it easy to use and maintain.
- The pump has good self-priming capabilities, so no liquid is required to fill the pump before operation.
- The lubrication of the KCB gear oil pump is automatically achieved by the liquid being transported, eliminating the need for additional lubrication during normal operation.
- The elastic coupling transmits power and compensates for small installation deviations, acting as a shock absorber during unavoidable hydraulic shocks.
Precautions
1. Installation
- Before installation, check whether the pump was damaged during transportation, such as whether the motor has become damp or the dust covers at the pump inlet and outlet have been damaged.
- Before installing the pipeline, clean the inner walls of the pipes with water or steam. Avoid letting the weight of the pipes be supported by the pump to prevent affecting the pump’s precision.
- The pipeline connections must be airtight to avoid the issue of not being able to suction liquid.
- To prevent foreign particles from entering the pump, install a metal filter mesh at the suction inlet.
2. Pre-Operation Checks
- Check that all fasteners are secure.
- Ensure the drive shaft turns smoothly.
- Confirm that the inlet and outlet valve are open.
- Verify the correct rotation direction of the pump (it should rotate counterclockwise when viewed from the pump end towards the motor).
3. Maintenance During Operation
- Monitor the pump’s pressure and vacuum gauge readings to ensure they are within the specified range.
- Inspect the packing chamber. If leaks occur, tighten the packing cover (but avoid overtightening to prevent excessive heating and rapid wear of the sealing rings).
- If abnormal noise or excessive temperature rise occurs during operation, stop the pump and perform an inspection.
- Do not adjust the safety valve arbitrarily. If adjustment is necessary, use instruments to calibrate the safety valve to the appropriate pressure settings.
4. Stopping the Pump
- Turn off the power supply.
- Close the inlet and outlet valves.
OEM & Custom Solutions
We offer OEM branding, stainless steel versions, copper gear options, high-temperature models, custom seals, custom port sizes, special-voltage motors, and export-grade packaging.
FAQs for Overseas Buyers
1. What liquids can the KCB/2CY pump handle?
Lubricating oil, diesel, heavy oil, and clean non-corrosive oils.
2. Can it handle corrosive liquids?
Yes, if using stainless steel gear pump versions.
3. Does it require priming?
No, the pump has strong self-priming capability.
4. Is a safety valve included?
Yes, all pumps include an integrated safety valve for over-pressure protection.
5. What is the maximum temperature?
Standard ≤70°C; high-temperature versions up to 200–300°C.
6. What seal types are available?
Packing seal, rubber seal, skeleton seal, and graphite packing.
7. Can you provide OEM customization?
Yes, including materials, voltage, seals, gears, and branding.