Product Selection Differences for External Gear Pumps for High Viscosity Fluids

When selecting external gear pumps for high viscosity fluids, there are several key differences to consider among the available options:

Gear Types: External gear pumps typically come in two main types: spur gears and helical gears. Helical gears are more suitable for high viscosity fluids as they provide a smoother flow compared to spur gears.
Materials of Construction: Ensure that the pump materials are compatible with the properties of the high viscosity fluid to prevent corrosion or degradation. Materials like stainless steel or cast iron are commonly used for high viscosity applications.
Clearances: Pay attention to the clearances between the gear teeth and the pump housing. For high viscosity fluids, larger clearances are required to prevent clogging and ensure smooth flow.
Flow Rate and Pressure: Select a pump that can meet the required flow rate and pressure specifications for your high viscosity fluid application. Consider the viscosity curves provided by the pump manufacturers to ensure the selected pump can handle the required viscosity range.
Temperature and Viscosity Range: Check the pump specifications to ensure that it can operate within the temperature and viscosity range of your high viscosity fluid. Some pumps are specifically designed to handle a wide range of viscosities and temperatures.
Sealing and Leakage: Look for pumps with good sealing mechanisms to prevent leakage, especially with high viscosity fluids. Options like mechanical seals or magnetic couplings can be beneficial for minimizing leaks.
Maintenance and Reliability: Consider the ease of maintenance and reliability of the pump. Look for features such as easy accessibility for maintenance tasks and a history of reliable performance with high viscosity fluids.

By considering these key differences among available external gear pump options, you can select the most suitable pump for handling high viscosity fluids in your specific application.