Structural characteristics of the most flaming air

Structural characteristics of air duct ventilation butterfly valve

structural characteristics of air duct ventilation butterfly valve

1. It is designed and manufactured by using a new structural form of welding the midline disc plate and the short structural steel plate. It has compact structure, light weight, easy installation, small flow resistance, large flow volume, avoids the impact of high temperature expansion, and is easy to operate

2. There are no connecting rods, bolts, etc. in it, which is reliable in operation and long in service life. It can be installed in multiple stations and is not affected by the flow direction of the medium

working principle:

the ventilation butterfly valve is driven by the motor to drive the actuator, so that the disc plate can rotate freely in the production of flexible bionic intelligent material "roll to roll" within the range of 90 °, so as to achieve the purpose of opening and closing or adjusting the medium flow. At present, the cost-effectiveness valve with fluorine lined butterfly valve and rubber lined butterfly valve to improve water recycling has been widely used in many fields such as petroleum, chemical industry, metallurgy, hydropower and so on as a component to realize the on-off and flow control of pipeline system. In the well-known butterfly valve technology, its sealing form mostly adopts sealing structure 1 and friction coefficient structure, and the sealing materials are rubber, polytetrafluoroethylene, etc

due to the limitation of structural characteristics, it is not suitable for high temperature resistance, high pressure resistance, corrosion resistance, wear resistance and other industries. The existing advanced butterfly valve is a three eccentric metal hard seal butterfly valve. The valve body and valve seat are connected components, and the sealing surface of the valve seat is overlaid with temperature resistant and corrosion-resistant alloy materials

the multi-layer soft laminated seal ring is fixed on the valve plate. Compared with the traditional butterfly valve, this butterfly valve has the advantages of high temperature resistance, light operation, and no friction when opening and closing. When closing, it compensates for the seal with the increase of the torque of the transmission mechanism, which improves the sealing performance of the butterfly valve and extends its service life. Classified construction and installation points of ventilation butterfly valve 1). The installation position, height and inlet and outlet direction must meet the design requirements. Note that the direction of medium flow should be consistent with the direction of the arrow marked on the valve body, and the connection should be firm and tight

the appearance of the valve must be checked before installation, and the nameplate of the valve should comply with the provisions of the current national standard "general valve marks" gb12220. For valves with a working pressure greater than 1.0MPa and having a cutting effect on the main pipe, strength and tightness tests shall be carried out before installation, and they can be used only after they are qualified. During the strength test, the test pressure is 1.5 times the nominal pressure, and the duration is not less than 5min. The valve shell and packing are qualified if there is no leakage. During the tightness test, the test pressure is 1.1 times of the nominal pressure