Introduction

In order to further standardize the design, construction, and acceptance of residential flue gas centralized emission systems, ensure project quality, promote high-quality development of residential areas, and meet the requirements of safety, applicability, economic rationality, and quality assurance, various regions have issued relevant landmark regulations. The GTI series detection instruments, with their accuracy and efficiency, have become an ideal choice for implementing new regulations and ensuring quality.

01 Air tightness test: prevent air leakage and ensure emission efficiency

After the installation of the exhaust duct is completed, it should be carried out before the installation of the air cap and valve. Using pipeline air leakage testing machine DALT6900/DALT6910, apply pressure into the tested exhaust duct, reach a certain pressure, stabilize and maintain it for 1 minute, and then start reading. Read the instrument reading every 1 minute, read the values 3 times, take the average as the measurement result of air leakage, and the detection value must be ≤ 0.1056 * P^0.65Built in regulations, the instrument will directly provide test results without the need for secondary calculations.

The test data and conclusions must be recorded, and the test report can refer to the following table:

Pipeline air leakage testing machine DALT6910

The GTI Pipeline Air Leakage Testing Machine DALT6910 Professional Edition is used for air leakage testing of air conditioning ducts, fire ducts, and enclosed spaces. It can detect segmented pipelines and the entire system's installed main pipeline to ensure system efficiency and avoid energy waste.

The instrument integrates various current testing standards in the air duct industry in Europe, America, and China. After testing according to relevant identification standards, it can directly determine whether the sealing of the pipeline is qualified. Printing function can be achieved through an external printer, and the whole machine is small in size and light in weight. It can be loaded and transported in the trunk of a family sedan, with a wider range of measurable flow rates, efficient and convenient, saving time and effort. Integrated touch screen operation, LCD color screen display, and a good human-computer interaction interface can achieve the entire testing process operation.

02 Ventilation Performance Test: Accurate Measurement to Improve Exhaust Efficiency

Under the weather conditions of no wind, no rain or snow, the ground floor fans were uniformly distributed and tested according to the test conditions. A handheld micro differential pressure gauge model GTI115+pitot tube was used to test the wind speed at the measuring points on the section as shown in the figure below. Each measuring point should be 0.1r, 0.3r, 0.6r away from the outer wall of the section, and measured three times at different positions. The average wind speed of each measuring point was taken as the average wind speed of the section, and the air volume was calculated based on the wind speed. The GTI115 is equipped with this algorithm, which can directly obtain the air volume.

Handheld micro differential pressure gauge GTI115/113

GTI115/113 is a portable micro differential pressure gauge with high measurement accuracy and can be used for non corrosive gas pitot tube anemometers.

Suitable for efficient air outlets, pipeline air outlets, and other wind speed values, it is an ideal instrument for hospitals, clean rooms, laboratories, HVAC systems, wall mounted gas pressure testing or pressure calibration. It has data storage and export functions, making it more convenient for users to use.

03 Other tests

Prevent smoke and backflow

Fire resistance test

On site wind shelter performance of roof hood

summary

The above requirements apply to residential kitchen and bathroom exhaust duct systems with a height of no more than 100m that are newly built, expanded, or renovated. Due to different landmarks and testing focuses, the above are representative testing items. In the application of various cities, corresponding testing can be carried out according to local standards. For example, Zhejiang Province clearly states that cement product exhaust ducts use smoke method to detect smoke prevention and backflow prevention, and stainless steel exhaust duct systems must detect duct air leakage.

Landmark Zhejiang DBJ33/T 1289-2022 Application Technical Regulations for Residential Kitchen Mixed Exhaust System; Landmarks Shandong - DB37/T 5081-2024 Technical Standards for Residential Smoke Concentrated Emission Systems; Beijing Tianjin Hebei mutual recognition and sharing J16312-2022 (Beijing DB11/T 1979-2021, Tianjin DB/T29-100-2022, Shijiazhuang DB13/T 8479-2022); For more testing requirements and precautions, please feel free to send us a private message.