Pay attention to the following matters when choosing a pneumatic ball valve
Three key points of pneumatic ball valve selection. The third key point: the selection of pneumatic accessories. Solenoid valve: a double-acting cylinder matches a two-position five-way solenoid valve or a three-position five-way solenoid valve. Single-acting cylinders can be equipped with two-position three-way solenoid valves. The voltage can be DC24V, AC220V, etc. Consider explosion-proof requirements.
Travel switch: The function is to convert the roll of the actuator into a contact signal, which is output to the control instrument, and feedback the switching situation of the field ball valve. Commonly used are mechanical type and magnetic induction type. Also consider explosion-proof requirements. Handwheel organization: The equipment is located between the ball valve and the cylinder. It can be manually switched when the air source fails to ensure the safety of the system and not delay production.
Air source treatment components: There are two-piece and three-piece, the function is to filter, reduce pressure, and oil mist. It is recommended to use the equipment to prevent the cylinder from entering impurities to cause the cylinder to be stuck. Valve positioner: For the equipment that needs to be adjusted for the pneumatic ball valve, it is mostly used for the pneumatic V-ball valve. When inputting 4-20mA, it is necessary to consider whether to bring feedback output signal. Whether explosion-proof is required. There are ordinary and intelligent types.
Quick exhaust valve: accelerate the switching speed of the pneumatic ball valve. The equipment is located between the cylinder and the solenoid valve, so that the gas in the cylinder does not pass through the solenoid valve, and is quickly discharged. Pneumatic amplifier: The equipment receives the pressure signal from the positioner outlet in the gas path leading to the cylinder, and supplies a large flow to the executive organization. , Used to improve the speed of valve action. According to 1:1 (the share of signal and output). It is mainly used to transmit pneumatic signals to long distances (0-300 meters) to reduce the impact of transmission lag.
The pneumatic ball valve includes a valve body, a valve core and a valve stem. The valve core and the valve stem are connected in linkage. The valve body of the product is equipped with a cylinder. The displacement of the piston rod of the cylinder and the roll of the valve stem are linked. The valve is controlled by the cylinder. Switch, and then make it more convenient, and the movement of the cylinder can be controlled by an external solenoid valve or a pull valve, and then the valve can be controlled remotely, and then it is more convenient.
