National construction engineering quality supervision and inspection center, relying on the abundant technical force and years of testing experience, in the absorption of Japan, the United States and Germany and other countries on the basis of advanced technology, combined with the concrete situation in our country, to develop a series conform to the situation of building doors and Windows dynamic pressure testing equipment, airtight, watertight properties of building doors and Windows, compressive deformation performance testing, fully conforms to the requirement of national standard for testing equipment. 1. standard of execution GB/T 7106-2008 Graduations and test methods of air permeability, watertightness, wind load resistance performance for building external windows and doors. BS EN 1026-2000 Windows and doors Air permeability Test method. BS EN 1027-2000 Windows and doors watertightness Test method. BS EN 12211-2000 Windows and doors Resistance to wind load Test method. 2. Main technical parameters

name		main indicators		precision
Wind pressure resistance		Static pressure difference：≥±5000Pa displacement：0~50mm		Static pressure difference:≤2% displacement：≤±0.1mm
Air tightness		Air flow：0~300m3/h		Air flow：≤3% Static pressure difference：≤2%
Water tightness	Stable pressure	spray range：2 L/（m2·min） Static pressure difference：≥700 Pa		spray range：2L/（m2·min） Static pressure difference：≤2%
	Pressure fluctuations	spray range：2~3L/（m2·min） cycle：≥3s		spray range：3L/（m2·min） cycle：2s~6s Pressure fluctuations：≤2%cycle：3s~5s
Power supply	Three phase five wire system:AC380V  15kW		Water requirement：Up and down water

3. model

model	Max size of test piece（m）	Static pressure box size（m）	Fan size（m）	Minimum size of the room（m）
MCD2424	2.4×2.4	L2.7×W1.4×H3	2.5×2.5×2	5×4×3.5
MCD3030	3.0×3.0	L3.5×W1.4×H3.6	2.5×2.5×2	6×4×4
MCD3535	3.5×3.5	L4×W1.4×H4.1	2.5×2.5×2	7×4×4.5
MCD3550	5.0×3.5	L5.5×W2.9×H4.1	2.5×2.5×2	8.5×4×4.5

[Product Features] 1. Pressure control range not less than ±7000Pa. 2. Uses imported American nozzles and an ultra-thick 600mm cabinet design, ensuring a safe distance between the nozzle and the specimen, forming a continuous, stable, and uniform water curtain on the outer surface of the specimen. It is equipped with a movable nozzle, allowing for irregular windows with less than 500mm of uneven surfaces during inspection. 3. The cabinet structure uses large thickened channel steel to ensure excellent compressive strength, and a unique special door for airtightness testing is designed on the side of the chamber to guarantee accurate and reliable airtightness testing; The interior of the tank is lined with stainless steel plates, and the water tank is made entirely of stainless steel, offering excellent corrosion and rust resistance. 4. The equipment undergoes vibration damping treatment; laboratories only need to provide water supply and drainage pipelines and power to operate, without the need for equipment foundation treatment. The pipeline routing of the equipment can be designed according to laboratory conditions. [Equipment with automatic control functions offers the following advantages] 1. The system is automatically controlled by a computer for adjusting static and fluctuating pressure, with real-time data collection and storage, ensuring data is not lost after power outage; 2. Power consumption varies according to pressure requirements, with built-in water tank for water circulation, making the equipment overall energy-saving and environmentally friendly; 3. Advanced data processing system that can automatically analyze test results and promptly and accurately output test reports; 4. Reports and original records are processed using Microsoft Word, allowing users to modify and create their own formats. The software includes the report format from the National Center for Quality Supervision and Inspection of Construction Engineering for user reference; 5. The dedicated measurement and control software is programmed by experienced inspectors using Windows 95/98/2K/XP platforms and VB/VC hybrid programming, allowing flexible human-machine interface control of the entire inspection process; 6. Open Access database management with strong compatibility, enabling seamless connection with any management software interface;