1. Air volume refers to the amount of exhaust air per unit time of the range hood when the static pressure is zero. Air volume is a very important indicator. In general, the larger the air volume is, the stronger the ability of the hood to suck and exhaust fumes. Therefore, when selecting the range hood, when the other indicators are good, as far as possible the selection of a larger value of the range hood. According to the national regulations, the value of the air flow rate of the range hood must be greater than or equal to 7 cubic meters per minute. According to the volume of your room, multiply it by 8, 10, 12 multiples to get the value of air volume.
2, wind pressure air pressure is also an important indicator to measure the use of hood performance. The greater the wind pressure value, the stronger the ability of the hood to resist falling. If the exhaust pipe is long or received in a public flues, the pressure of the exhaust pressure is greatly lost, so that more air pressure is needed to ensure that the smoke is discharged. Therefore, when other indicators are good, the larger the wind pressure, the better. According to the national regulations, the value of this indicator is greater than or equal to 80 Pascals.
3, noise It refers to range hood in the rated voltage, rated frequency, with the highest speed gear operation, measured according to the provisions of the method. According to the national regulations, the value of this indicator should not exceed 74 decibels.
4. Degree of odor reduction Under the specified test conditions, the ratio of the difference between the maximum odor concentration in the laboratory and the maximum odor concentration in the working state of the range hood to the maximum odor concentration in the laboratory. The bigger the better, it means that the smoke is better. A series of complicated changes in the cooking oil and food in the kitchen produce a large amount of thermal oxidation decomposition products, some of which are emitted into the air in the form of smoke to form kitchen fumes. The components of the oil fume are complex: there are more than 220 kinds of aldehydes, ketones, fatty acids, alcohols, aromatic lipid compounds, lipids, lactones, and heterocyclic compounds, most of which are toxic. Therefore, in the purchase of range hoods, in addition to attention to the size of the suction, the degree of odor reduction is also a very important reference indicator.
PVC High Speed Door are designed for indoor use and ensure rapid handling operations between different areas that should remain separated. These safe and efficient industrial doors are made of a shaped steel frame and covered with PVC. These high speed doors are safe and efficient and consist of a shaped steel frame covered with PVC. Safety is ensured by their photocells and barriers.
High speed doors protect us from harm, save energy and help us to separate processes for optimal productivity. A high speed door's most important job is to simply open and close quickly and safely every time you need it.
The high speed pvc roll shutter door require high strains, caused by the high operating speed and the frequency of openings, have to be taken into account during construction. In the same way, basic conditions like size and installation location add up to considerable requirements regarding safety and control technique.
PVC High Speed Door,Large PVC High Speed Door,Transparent High Speed Door,Great Performance High Speed Door
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hfautodoors.com