Specialized hydraulic pump for high-precision quantitative supply of liquids such as chemicals, additives, and lubricants. Used in manufacturing for cutting oil supply during metal processing, chemical injection in chemical plants, additive dosing in food manufacturing, and paint supply in coating lines. Available in diaphragm, plunger, and gear types with flow control accuracy of ±1% or better. Offers diverse material options including stainless steel for corrosive liquids and chemical-resistant resins. Enables unmanned quantitative supply through integration with automatic control systems. Positioned as specialized equipment for specific applications, emphasizing flow accuracy and chemical compatibility unlike general hydraulic pumps.