Products roof ventilators, also known as the roof for natural ventilation and roof for natural ventilation. Focused on aerodynamic wind vector-type theory "wind action on the object, the windward side is the pressure side of the leeward side and downwind to commence suction". Product attributes its performance mainly reflected in: (1) overall streamline arc, both to ensure ventilation body strength, but also effectively reduce ventilation body to withstand wind pressure ventilation body height and arc formed volume, improve indoor air collection and disposal capacity. The roof ventilators snow load capacity depends on the form of the design of the steel frame, the thickness of the material specifications of the steel frame and hood cover and other factors, including the choice of component materials specifications is very important, should first guarantee to meet wind and snow load requirements, while also Avoid unnecessary use large size. Use roof for natural ventilation, airflow to optimize multi-condition test structure optimization improvements. Have outstanding advantages of low exhaust resistance, good natural ventilation equipment, also has good anti-rain and snow and sheltered performance, any size, direction of natural wind does not affect the the roof ventilation exhaust effect, save another Let the windshield. Envelope board uses a pressure-type color steel or fiberglass, light weight, no vibration, do not consume energy, on-site installation, short construction period, etc.. External color is usually blue or white, can also be based on user requirements determined. Installation, maintenance, rainproof requirements and structure designed to prevent the intrusion of rain and snow on the roof ventilators basic requirements. Peripheral fender, hood cover and the standardization of the pan of water board installation and construction is the the ventilation the rainproof ability of important guarantee: (1) the board is in place, according to the design drawings. Should generally years to reverse the position of the maximum frequency of wind direction as the installation starting point. (2), to determine the installation direction, the end edges of the sealing plate to install fixed, then the first plate is mounted in place, and fixed, to ensure that the vertical and purlins. (3), the second plate should be installed with the projections of the first plate along the overlap, by checking to ensure full contact of the outer edge of the two plates and flat, thus ensuring overlap intact, and with a ring of self-tapping screws purlin connected together. (4) between the color steel C purlin tapping galvanized screws, (5), fixed reliable or not directly related to the number of connections, spacing, connection quality. Set waterproof sealing material at the laying of the well in order to ensure inter-board water leakage phenomenon does not occur. Note roof ventilators throat can be loaded valve plate, generally without valve plate, the active valve plate may be used or fixed valve plate. Regulation of activities of the valve plate and hoist can be manual and electric two forms, can achieve flexible operation, the purpose of any regulation. From the diversion valve plate in the open, to ensure good ventilation effect, closed tightly closed, to ensure the normal operation of the heating system at design conditions, high moisture content of the plant, can be taken on the the throat valve plate and hoardings insulation measures to prevent condensation other the roof natural ventilation is the ideal replacement products, natural ventilation, high thermal plant widely used in electric power, metallurgy, chemical industry, petroleum, machinery and other departments of the various types of plant ventilation. The works of the roof for natural ventilation: natural ventilation caused by hot pressing and wind caused by the temperature difference between indoor and outdoor air pressure to achieve a ventilation mode of ventilation. Description of a transaction, deal face to face 2, online trading 3 auction Buy transaction