Support a variety of flow path collocation which meets the needs of different customers. RUNZE patented Sapphire valve rotor and stator, anti-corrosion and high-pressure, high-temperature resistance, high wear resistance, biocompatible and suitable for a variety of special media. High efficiency and maintenance-free stepper motor drive system via RS232/RS485/CAN Small footprint suits limited spaces. Widely used in environmental analysis instruments, laboratory analyzers, medical analysis equipment, and chromatographic analyzers, etc.