How should the air volume and static pressure be written in the FFU technical agreement?

Direct answer: The technical agreement should write the air volume and static pressure as testable requirements under the same working point : clarify the target air volume, corresponding resistance or static pressure, filter configuration, operating gear, measurement position, test method and allowable deviation.

FFU consists of fan, motor, filter, box and control system working together. purchaseWhen it comes to FFU fan filter units , if the agreement only lists two isolated parameters, the supplier and the project party may have different understandings of the test conditions, and it will be difficult to compare prototype, factory and field data.

Filters and operating modes must be written synchronously

Filter efficiency, specifications and initial resistance at design air volume should be related to the overall air volume terms. When changing the filter model or efficiency level, it is necessary to re-confirm the fan operating point and the overall air volume.

If the project uses multiple gears such as production and duty, it is recommended to list the target air volume and test conditions for each mode separately. Just because the highest gear meets the standard does not mean that the commonly used gears also meet the design requirements. Long-term operation projects can also agree on air volume review and maintenance conditions after the filter resistance changes.

There are three stages of acceptance. What is tested in each stage?

Prototype confirmation: Check the final configuration to be delivered, performance under target air volume, filter sealing and control gear.

Factory inspection: Confirm the configuration and testing requirements of batch products according to the agreement, and check the consistency of key performance.

On-site acceptance: Check the air supply volume, wind speed distribution and cleaning effect under actual installation and agreed operating conditions. The on-site airflow organization is affected by the return air and the location of the equipment, and cannot be replaced by the factory air volume alone.

Aili Industrial can match the FFU complete machine configuration according to the project's target air volume, filtration requirements, installation dimensions and control methods. During technical communication, it is recommended to directly provide the design drawings and the proposed acceptance conditions. Both parties will first confirm the prototype test conditions, and then implement the performance indicators into the batch technical agreement. Specific parameters are subject to actual measurement results under agreed working conditions.