1. Gear Pump Models: KV06 mini excavator, KV10 mini excavator, KV12 mini excavator, KV18 mini excavator
· Features:
· Simple structure, low cost, durable, dirt-resistant
· Medium pressure, fixed displacement (non-adjustable flow)
· Average noise level, medium efficiency
· Applications in excavators:
· Pilot pump (almost all are gear pumps): provides control pressure for control levers and pedals
· Activates main pump and main control valve
· Low-pressure auxiliary systems
· Hydraulic oil cooling, pilot oil supply
· Main pump for mini & micro excavators (around 1 ton)
· Extremely low cost, sufficient for basic use
· Summary in one sentence:Gear pump = for control, low pressure, low cost, simple.
2. Piston Pump (Axial Piston Pump) Models: KV20 mini excavator, KV22 mini excavator, KV25 mini excavator, KV30 mini excavator
· Features:
· High pressure, high efficiency, variable displacement
· Automatically adjusts flow according to load
· High cost, high precision, requires clean hydraulic oil
· Applications in excavators:
· Main hydraulic pump (used in 99% of modern small excavators)
· Drives boom, arm, bucket, swing, and travel
· Provides high pressure and high power
· Used in load-sensing systems
· Fast response, smooth combined movements, fuel-saving
· Core power source for 1.5–10 ton small excavators
· Summary in one sentence:Piston pump = main pump, for working, high power, high efficiency, higher cost.
· Simple Comparison Chart (Easy for customers to understand)
· Gear Pump
· Pressure: Low to medium
· Flow: Fixed
· Position: Pilot pump
· Advantages: Cheap, durable
· Disadvantages: Fuel consumption, less precise operation
· Piston Pump
· Pressure: High
· Flow: Variable
· Position: Main pump
· Advantages: Fuel-saving, powerful, smooth operation
· Disadvantages: Higher cost, requires clean oil
