High-pressure pumps are mechanical devices capable of pressurizing liquids or gases to high pressures, widely used in various fields such as industry, agriculture, municipal engineering, and environmental protection.
Plunger Pumps: Plunger pumps achieve liquid intake and discharge through the reciprocating motion of a plunger within a cylinder. They are characterized by high pressure, stable flow, and high efficiency. Their pressure range typically reaches tens to hundreds of megapascals, making them suitable for high-pressure cleaning, waterjet cutting, and oil extraction. The disadvantages of plunger pumps are their complex structure, high maintenance costs, and strict requirements for the cleanliness of the medium.
Diaphragm Pumps: Diaphragm pumps utilize the reciprocating deformation of a diaphragm to change the pump chamber volume, achieving liquid transport. Their advantages include good sealing and no leakage, making them suitable for transporting corrosive, toxic, or flammable and explosive media. The pressure range is generally 0.1-10 MPa, commonly used in the chemical, food, and pharmaceutical industries. The flow stability of diaphragm pumps is slightly lower than that of plunger pumps, but their maintenance costs are lower.
Gear Pumps: Gear pumps transport liquids through the meshing rotation of gears. They are characterized by simple structure, small size, and strong self-priming ability. Their pressure range is typically 0.2-20 MPa, suitable for transporting high-viscosity media such as lubricating oil and hydraulic oil. The disadvantages of gear pumps are large flow pulsation and high requirements for media cleanliness.
Screw Pumps: Screw pumps transport liquids through the rotation of a screw. They offer advantages such as uniform flow, stable pressure, and low noise. Their pressure range can reach over 10 MPa, suitable for transporting high-viscosity media containing solid particles, such as sewage and slurry. Screw pumps have higher maintenance costs but longer service life.
