The difference between FFU and laminar flow hood

FFU can be connected and used in modular form. It is widely used in clean rooms, clean workbenches, clean production lines, assembled clean rooms and local Class 100 applications. FFU is equipped with primary and high-efficiency two-stage filters. The fan sucks air from the top of the FFU and filters it through primary and high-efficiency filters. The filtered clean air is uniformly delivered at a wind speed of 0.45M/S±20% on the entire air outlet surface. It is suitable for obtaining a high-level clean environment in various environments. It provides high-quality clean air for clean rooms and microenvironments of different sizes and cleanliness levels. In the renovation of new clean rooms and clean plant-style renovations, it can improve the cleanliness level, reduce noise and vibration, and greatly reduce the cost. It is easy to install and maintain, and is an ideal component for clean environments. Large-area use provides a clean environment, mostly used for Class 100 or higher. Generally, the floor is required to be an elevated floor with a return air channel, and the cleanliness of the next level must be guaranteed around this level. The cost is relatively high.

Laminar flow hood is an air purification device that can provide a local high-clean environment. It is mainly composed of a box, a fan, a primary air filter, a damping layer, a lamp, etc., and the outer shell is sprayed with plastic. This product can be suspended or supported on the ground, with a compact structure and easy to use. It can be used alone or connected in multiples to form a strip-shaped clean area. The laminar flow hood is to form a uniform flow layer after the air passes through the high-efficiency filter at a certain wind speed, so that the clean air flows vertically in one direction, thereby ensuring that the cleanliness required by the process is achieved in the working area. There are two types of clean laminar flow hoods: fan-installed and fan-external, and the installation methods are hanging and floor-standing bracket. The laminar flow hood is to pass the air through the high-efficiency air filter through the fan at a certain wind pressure, and then the damping layer is used to equalize the pressure, so that the clean air is sent into the working area in a vertical laminar airflow, thereby ensuring that the working area reaches the high cleanliness required by the process.