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The return valve of the Z vane is used to return or exhaust the air. This model of valves is famous for the special shape of the vane, the Z vane return valve. In addition to the suitable pressure drop of this valve, there are advantages such as the absence of visibility into the channel or the other side of the valve and the non-penetration of water particles (rain) in the air at medium speeds. Due to the special shape of the vanes, this valve has a higher mechanical resistance against incoming forces or impacts, so it is recommended to use this valve in places where there is a possibility of physical contact with people. Also, this high mechanical resistance helps to make these valves in one piece in long widths without the need to cut the blade into several pieces. If there is a need for a return valve or air exchange between two environments in very large dimensions and there is enough depth in the installation location of the valve, it is recommended to use a ventilation louvre. Due to the use of Z blade return valves, they are generally ordered with various types of bird nets, insect nets, etc.
Like most of the valves produced in this collection, an automatic screw is used to install this product, and instead of a screw (treasure), it is created before applying the color coating on the valve frame. It is better to install this valve on a wooden or metal frame to be sure, and if the valve is installed directly on plaster, there is a possibility of the valve loosening over time. In order to install this valve on false walls with dry materials (Kenaf, etc.), it must be ensured that special false ceiling profiles are used around the opening of the valve for strength and reliable connection of the valve to the wall.
For the final coating of these valves, electrostatic furnace colors are used. After the production process, in order to remove any grease dust and other particles, the valves are acid washed, and after applying the desired undercoating (it is selected according to the type of metal and a different coating is used for each type of metal), it is sprayed on the camwire line. and are placed in the oven. At this stage, the color required by the customers is sprayed on the surface and the direction valves enter the oven during the baking stage. In the baking stage, the temperature of the oven (the graph of the temperature experienced by the valve) is very important and incomplete baking has an adverse effect on the final coating. put Also, overcooking the paint causes the color to change and become matte.
On 12/16/1390, Shahrokhi Technical Institute was successful in receiving the license to use the mandatory national standard mark of air valves for the first time in Iran, and according to the decree of the National Standards Department of Iran, it started working as a partner laboratory of the Standards Department. All products produced in Shahrokhi Technical Institute, including this product, have the ability to perform various types of tests in the presence of supervisors and customers in accordance with standards 7693 and 7695 for pressure drop, throw length, flow distribution pattern and other parameters.
Installation of the return valve of the blade Z
The installation of these valves is done by self-tapping screws and on a wooden frame installed on the edge of the channel, so it can be used on all types of walls such as plaster, cement, brick, wood, etc. The aluminum Z-vane check valve can be ordered with parallel or cross-valve back dampers and mesh. This valve is produced in different types of electrostatic powder colors.
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