Purpose and characteristics:
The air volume control does not need external power. It relies on the air flow pressure in the air duct and the vanes in the valve, air bag, spring leaf, baffle and cam to control the opening position of the valve and vanes, so as to keep the air volume constant.
Wddf electric constant air volume valve is based on wjdf mechanical constant air volume valve, which adds electric actuator, so that users can adjust the constant air volume remotely and improve the convenience performance.
Note: wddf-k is the electric on-off constant air volume valve, wddf-m is the electric analog constant air volume valve.
Structure and working principle of wjdf series mechanical constant air volume valve
It is composed of valve plate, special-shaped cam connected with air bag and spring plate. The air bag has small holes connected with the valve plate. When the pressure or flow of air supply pipe increases, the air bag expands collectively, thus increasing the closing torque of the valve plate, making the valve plate move towards the direction of closing the valve, and at the same time, it is controlled by the spring plate to keep balance, thus increasing the local resistance of the valve and increasing the pressure loss, It can keep the air volume constant. On the contrary, the air bag retraction valve moves towards the opening direction, so that the air volume remains unchanged. At the same time, according to the curve calculation and experiment of the special cam, we get the corresponding air volume of the tension of the spring plate with the different position of the special wheel, and draw a scale, which makes it easy for customers to adjust the air volume.
Purpose and characteristics:
The air volume control does not need external power. It relies on the air flow pressure in the air duct and the vanes in the valve, air bag, spring leaf, baffle and cam to control the opening position of the valve and vanes, so as to keep the air volume constant.
Wddf electric constant air volume valve is based on wjdf mechanical constant air volume valve, which adds electric actuator, so that users can adjust the constant air volume remotely and improve the convenience performance.
Note: wddf-k is the electric on-off constant air volume valve, wddf-m is the electric analog constant air volume valve.
Structure and working principle of wjdf series mechanical constant air volume valve
It is composed of valve plate, special-shaped cam connected with air bag and spring plate. The air bag has small holes connected with the valve plate. When the pressure or flow of air supply pipe increases, the air bag expands collectively, thus increasing the closing torque of the valve plate, making the valve plate move towards the direction of closing the valve, and at the same time, it is controlled by the spring plate to keep balance, thus increasing the local resistance of the valve and increasing the pressure loss, It can keep the air volume constant. On the contrary, the air bag retraction valve moves towards the opening direction, so that the air volume remains unchanged. At the same time, according to the curve calculation and experiment of the special cam, we get the corresponding air volume of the tension of the spring plate with the different position of the special wheel, and draw a scale, which makes it easy for customers to adjust the air volume.
