Three key points for pneumatic ball valve type selection and the third key point for cylinder structure
Selection of solenoid valves for pneumatic accessories: double effect cylinders are generally equipped with two five way solenoid valves or three five way solenoid valves. The single acting cylinder can be equipped with two three-way solenoid valves. The voltage can be DC24V, AC220V, etc. Explosion proof requirements shall be considered.
Travel switch: it is used to make the actuator roll into a contact signal and output it to the control instrument to feedback the on / off status of the on-site ball valve. Commonly used are mechanical and magnetic induction. At the same time, considering the explosion-proof requirements, hand wheel mechanism: the device between the ball valve and the cylinder can be changed to manual switch in case of air source failure, so as to ensure the system and not delay production.
Air source processing element: it is divided into two and three parts, and its functions are filtration, decompression and oil mist. Main control device, to avoid jamming caused by impurities in the cylinder entering the cylinder, valve: used for the demand device of proportional adjustment pneumatic ball valve, mostly used for pneumatic V-shaped ball valve. Input 4-20mA and consider whether there is feedback output signal. Whether explosion-proof is required. There are traditional models and intelligent models.
Quick exhaust valve: accelerate the speed of pneumatic ball valve. The device is located between the steel cylinder and the solenoid valve, so that the gas in the steel cylinder does not pass through the solenoid valve, and the gas amplifier discharges quickly. The pressure signal at the outlet is received in the air path to the cylinder and provides a large flow to the actuator for increasing the speed of the valve. Press 1:1 (signal output ratio). It is mainly used for long-distance (0-300m) transmission of pneumatic signals to reduce the impact of transmission lag.
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