Frequently Asked Questions (FAQs)
1. What is the difference between a gear pump and a hydraulic pump?
The main difference between a gear pump and a hydraulic pump lies in their operation. A gear pump uses cogs or gears to move fluid throughout the pump, while a hydraulic pump uses a piston to move liquid through the pump valves. Both pumps require hydraulic fluid to generate mechanical power.
2. What are the disadvantages of a gear pump?
Gear pumps have a few disadvantages. They are not recommended for pumping abrasive media or solids due to the meshing gears. The design of gear pumps can be complicated, adding to their initial cost. These pumps can be noisy in certain environments. Additionally, they have limitations in terms of size and are not suitable for operations requiring large bulk flow rates.
3. Can you pump water with a gear pump?
Yes, gear pumps are commonly used for pumping water, light oils, chemical additives, resins, or solvents. They are particularly preferred in applications where accurate dosing or high-pressure output is required. Gear pumps, especially external gear pumps, are capable of sustaining high pressures.
4. Which is better, a piston pump or a gear pump?
Both piston pumps and gear pumps have their advantages. Gear pumps are available in a wide range of displacement sizes and pressures, making them suitable for various machinery applications. On the other hand, piston pumps offer higher pressure ratings and are variable displacement and energy-efficient.
5. What are the types of gear pump?
There are two main types of gear pumps: external gear pumps and internal gear pumps. External gear pumps use two external opposing gears, typically spur gears, to transfer the fluid. Internal gear pumps, on the other hand, use one outer ring gear and one internal pinion gear running inside the ring gear.
6. Are gear pumps easy to maintain?
Yes, gear pumps are generally easy to use and maintain. They come at a low cost, are highly effective, and are not affected by changes in fluid viscosity or density. Gear pumps come in two different forms: internal and external.