In the choice of pneumatic ball valve should pay attention to the following matters
Pneumatic ball valveSelection of three key points to pay attention to cylinder structure diagram. The third key point: selection of pneumatic accessories. Solenoid valve: double-acting cylinder with one matching two-position five-way solenoid valve or three-position five-way solenoid valve. The single-acting cylinder can be equipped with a two-position three-way solenoid valve. Voltage can choose DC24V,AC220V, etc. Explosion-proof requirements shall be considered.
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 opening and closing of the field ball valve. Commonly used mechanical, magnetic induction type. Also consider explosion-proof requirements, handwheel organization: the equipment is between the ball valve and the cylinder, which can be changed to manual switch when the gas source is faulty to ensure the safety of the system and not delay production.
Air source processing components: there are two and three parts, the function is filtering, decompression, oil mist. It is suggested that the equipment should be used to prevent the cylinder from getting stuck by impurities in the cylinder. Valve positioner: for the equipment required for the share conditioning type pneumatic ball valve, it is mostly used for pneumatic V-type ball valve. Input 4-20mA, to consider whether with feedback output signal. Whether explosion-proof is required. There are ordinary type, intelligent type.
Quick exhaust valve: accelerate the speed of pneumatic ball valve switch. The device is between the cylinder and the solenoid valve, so that the gas in the cylinder does not pass through the solenoid valve and is discharged quickly. Pneumatic amplifier: The device receives the pressure signal from the outlet of the positioner in the gas path leading to the cylinder, and supplies a large flow to the executive organization., Used to improve the speed of action of the valve. Press 1:1 (signal and output share). It is primarily 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 linked together. The valve body of the product is provided with a cylinder. The displacement of the piston rod of the cylinder is linked with the rolling of the valve stem. The opening and closing of the valve are controlled by the cylinder, and then the opening and closing of the valve can be controlled remotely, then more convenient.