Types and application scope of gear oil pumps

Gear oil pump is a common positive displacement pump that transports liquids through gear meshing. It has the characteristics of simple structure, durability, and stable flow rate, and is widely used in the industrial field. The following is a detailed introduction to its model types, characteristics, and typical application scope:

1、 Main models and types of gear oil pumps

1. Classify by gear type

external gear pump

Features: Two external gears mesh with each other, with a simple structure and low cost, but with high noise.   

Model examples: KCB series (such as KCB-18.3), YCB series, 2CY series, ZYB series and other gear oil pumps.   

Applications: Lubricating oil transportation, fuel systems, hydraulic systems (low-pressure scenarios).   

internal gear pump

Features: The internal gear is matched with the external gear (or crescent plate), resulting in small flow pulsation, low noise, and high efficiency.   

Model examples: NYP series, BN series (such as BN-HTF).   

Application: High precision medium transportation (such as chemical and food industries).   

2. Classify by structural form

Single-stage gear pump

A single set of gears with low pressure (usually<2.5MPa), such as the CB-B gear pump.   

Multi stage gear pump

Multiple sets of gears connected in series can provide higher pressure (such as high-pressure pumps in hydraulic systems).   

3. Classify by material

Cast iron gear pump

Universal type, suitable for non corrosive media (such as KCB series).   

Stainless steel gear pump

Corrosion resistant, used in food and chemical industries (such as NYP series made of 304/316 stainless steel material).   

Copper gear pump

Explosion proof or special media (such as flammable liquids).   

4. Special design types

Magnetic driven gear pump

No leakage, used for toxic or expensive media (such as MCB series).   

High temperature gear pump

High temperature resistant design (such as asphalt pump, model RCB-300).   

High viscosity gear pump

Large modulus gear design for conveying asphalt, resin, etc. (such as SNH series).   

2、 Application scope of gear oil pump

1. Industrial lubrication system

Scenario: Lubricating oil circulation of equipment such as machine tools, reducers, compressors, etc.   

Model: CB-B type, 2CY series.   

2. Petroleum and Chemical Industry

Media: diesel, crude oil, solvents, acidic and alkaline liquids (requiring corrosion-resistant materials).   

Model: Stainless steel KCB series, magnetic drive pump.   

3. Food and pharmaceuticals

Requirement: Hygiene grade design, easy to clean (such as stainless steel or food grade coating).   

Model: KCB series, NYP series (compliant with FDA standards).   

4. Hydraulic system

Scenario: Hydraulic power source for construction machinery and injection molding machines.   

Model: High pressure gear pump (such as GPC series).  

5. High viscosity medium

Media: asphalt, paint, adhesive.   

Model: RCB asphalt pump, three screw pump (gear variant).   

6. New energy and special fields

Scenario: Biodiesel, thermal oil circulation.   

Model: High temperature YCB-G series.   

3、 Key parameters for selection

1. Flow rate and pressure: For example, KCB-300 represents a flow rate of 300L/min and a pressure of 0.33MPa.   

2. Medium characteristics: viscosity, corrosiveness, and particle content (wear-resistant design should be selected).   

3. Working temperature: High temperature media require heat-resistant seals (such as fluororubber).   

4. Installation environment: Explosion proof requirements (ExdIIBT4 level).   

4、 Common Brands and Standards

Domestic brands: Hengsheng Pump Industry, Shiqi Pump Industry, Taibang Pump Valve, etc.   

International brands: BOSCH from Germany, CASAPPA from Italy, Viking from the United States.   

Standards: API 676 (Rotary Pump Standard), GB/T 11035 (Domestic Gear Pump Standard).   

5、 Precautions

Maintenance: Regularly inspect gear wear and seal leaks.   

Taboo: Avoid dry running (no medium operation) to prevent gear jamming.   

Choosing a suitable gear oil pump requires comprehensive consideration of the medium, operating conditions, and cost. For special applications, the manufacturer can be consulted for customized solutions.