The variable air volume control system is relative to the constant air volume system. In the past, the laboratory ventilation system was only composed of fans whose power and air volume were basically constant. Neither the air volume nor the room temperature and humidity can be controlled, and the ventilation system only acts as an exhaust. The variable air volume system means that the supply air changes with the exhaust air, and the exhaust air changes automatically or artificially according to people's needs. The supply air and the exhaust air form a dynamic balance, so that the room always maintains a relatively constant temperature and humidity. and slight negative pressure. Its working principle is that when the exhaust air volume changes, the system end device automatically adjusts the air volume sent into the room to ensure that the indoor temperature, humidity and pressure are kept within the design range, so that the air supply volume of the air handling unit at low load decreases. , the speed of the blower of the air handling unit is also reduced to achieve the purpose of energy saving.

Butterfly valve is a kind of non-sealed butterfly valve, which is widely used in building materials, metallurgy, mining, electric power and other production processes where the medium plays a decisive role) temperature ≤ 300 ℃ nominal pressure 0.1Mpa pipeline, used to communicate, open and close or Adjust the amount of media.

Ventilation butterfly valve is used in dusty cold air or hot air gas pipelines of ventilation and environmental protection projects in chemical, building materials, power stations, glass and other industries, as a pipeline control device for gas media to adjust flow or cut off. This type of valve (function: cut-off, diversion, voltage stabilization, diversion, etc.) should generally be installed horizontally in the pipeline.

Application scope of vav variable air volume butterfly valve

Butterfly valve (mainly composed of valve body, valve stem, butterfly plate and sealing ring) is a kind of regulating valve with simple structure, and can also be used for on-off control of low-pressure pipeline medium. The ventilation butterfly valve is a non-hermetic butterfly valve. Ventilation butterfly valve is used in dusty cold air or hot air gas pipelines of ventilation and environmental protection projects in chemical, building materials, power stations, glass and other industries, as a pipeline control device for gas media to adjust flow (unit: cubic meters per second) or cut off. This type of valve should generally be installed horizontally in the pipeline.

Structural features of vav variable air volume butterfly valve:

1. It is designed and manufactured by adopting a new structural form of welding the center-line disc plate and the short-structure steel plate. It is compact in structure, light in weight, easy to install, small in flow resistance, and large in flow, avoiding the influence of high temperature expansion and easy to operate.

2. There are no connecting rods, bolts, etc. in the air volume control valve, which has reliable operation and long service life. It can be installed in multiple positions and is not affected by the flow direction of the medium. There are no connecting rods, bolts, etc. in the inner, reliable operation and long service life. It can be installed in multiple positions and is not affected by the flow direction of the medium.

vav variable air volume butterfly valve application:

vav variable air volume butterfly valve (mainly composed of valve body, valve stem, butterfly plate and sealing ring) is a kind of non-closed butterfly valve, which is widely used in building materials, metallurgy, mining, electric power and other production processes and various media (determining substances) The nominal pressure is 0 when the temperature is less than or equal to 300°C. The flue ventilation butterfly valve is a kind of non-closed butterfly valve, and the butterfly valve is a kind of regulating valve with simple structure. The VAV valve must be visually inspected before installation, and the nameplate of the valve should comply with the current national standard "General Valve Mark" GB 12220. On the 1Mpa pipeline, it is used to connect, open and close or adjust the amount of medium.