Industry Insights & Technical Resources

The laboratory ventilation system cannot be equipped with only one exhaust valve. Stable room pressure requires the coordinated operation of air supply, fume hood exhaust, room comprehensive exhaust and control systems. Mismatched selection may result in difficulty in opening the door, odor leakage, increased noise, or energy waste.

Venturi Valve is widely used in air supply, exhaust and fume hood control in laboratories, hospitals, clean rooms, animal rooms and biosafety facilities. If only the air duct size or maximum air volume is provided during procurement, it will be difficult for the supplier to judge whether the valve can operate stably under the actual pipe network pressure. The complete inquiry parameters should cover air volume, pressure difference, control method, installation conditions and medium environment. The more complete the parameters are, the more problems can be reduced such as insufficient valve air volume, slow control response, high noise, or inability to connect to the BMS.

The pipe network pressure in laboratories, hospitals and clean rooms will change with the status of fans and valves. Ordinary air valves are prone to air volume fluctuations, which affects the room pressure difference and the number of air changes. Venturi Valve can automatically adjust the flow area within the specified pressure difference and air volume range, compensate for pressure changes and stabilize the target air volume. "Pressure difference independent" does not mean that there is no need for pressure difference, but it reduces the impact of static pressure changes on air volume within the rated range.

The low price of air filters does not necessarily mean low overall cost. For air-conditioning boxes, clean rooms, pharmaceuticals, electronics factories and industrial ventilation systems, the dust holding capacity of the filter will directly affect the replacement cycle, manual maintenance, system energy consumption and the life of the post-stage HEPA filter. Therefore, when purchasing, you should not only compare the unit price and filtration level, but also compare the dust holding capacity and resistance changes under the same test conditions.

CAV (Constant Air Volume) constant air volume valve is used to maintain the set air volume within a certain range of static pressure changes. It is commonly used in office buildings, hospitals, clean rooms and laboratory air supply and exhaust systems. When insufficient air volume, excessive noise, or unstable control occurs during a project, it is usually not a failure of the valve itself, but a mismatch in the air volume range, available static pressure, or installation conditions.

AV Damper usually refers to the Air Volume Damper used in HVAC duct systems. Its function is to regulate or cut off the air supply, return air and exhaust air. If you only choose according to the diameter of the air duct when purchasing, problems such as excessive noise, increased pressure loss, unstable air volume adjustment, or the inability of the actuator to completely close may occur. Reasonable selection should also check the air volume, size, wind speed, system pressure and control signal.

When purchasing venturi valves for laboratories, hospitals and clean room projects, the relationship between ABS and aluminum alloy valve bodies is not a simple one of "low configuration and high configuration". The core differences between the two are mainly corrosion resistance, mechanical strength, temperature adaptability, weight and purchase cost. For correct selection, you should first analyze the exhaust medium and installation environment, and then confirm the air volume control parameters.

FFU (Fan Filter Unit) combines a fan with a HEPA or ULPA filter and is used in clean room ceilings and local clean areas. If you only confirm the outer dimensions when purchasing, problems such as insufficient air volume, substandard cleanliness, high noise, or the fan's inability to overcome filter resistance may easily occur. The correct selection should be based on the cleanliness level, room area, ceiling coverage, number of air changes, filter resistance and operation control requirements, rather than comparing the air volume of a single FFU unit alone.