Lab Ventilation System

Interpreting Variable Air Volume (VAV) Systems: In large ventilation systems, to meet the variable air volume requirements at the end of ventilation equipment and the requirement for constant face velocity, further adjustment is needed. We utilize variable frequency + VAV ventilation control to address this.
       Airflow Control for Fume Hoods: As an essential primary protection equipment in chemical laboratories, fume hoods are subject to strict face velocity requirements across countries. Generally, it is required to maintain a constant face velocity of 0.5 m/s. Both excessive and insufficient face velocities pose leakage risks.
       Other Local Exhaust Ventilation Control: Local exhaust systems such as universal hoods, atomic absorption hoods, and reagent cabinets should be capable of continuous and efficient control, safely and rapidly exhausting gases.
       Room Pressure Control: It is typically required to maintain a negative pressure for the laboratory relative to the corridor at all times to prevent cross-contamination with surrounding office or production areas.

       Fan classifications
       According to the air flow method, fans are categorized into three types: centrifugal (usually placed outdoors), axial (usually placed indoors), and mixed flow (oblique flow) fans.
       Winds turbines are categorized by material, including common steel, stainless steel, PP, and glass fiber reinforced plastic (GFRP) models.
       

       Features of the fan:
       Centrifugal fan features: high power consumption, high operating costs, loud noise, and strong suction capacity (high air pressure), suitable for complex systems, primarily installed outdoors or on rooftops.
       Axial fan features: low power consumption, lower operating costs, but high noise and low suction force (low wind pressure), suitable for simple systems, generally can be mounted on walls or pipes.
       Tilted flow fan features: energy consumption, operating costs, and suction power are between the first two; lower noise level; suitable for simple systems; generally can be installed indoors.