Pneumatic actuated gate valve is a commonly used terminal control element in industrial automation control system. Pneumatic ball valve adjusts the flowing medium to compensate the load flow and make the controlled process as close as possible to the set point required by the system design. On-off pneumatic valves are generally composed of pneumatic actuators, valves, solenoid valves, limit switches, air source processing components, manual operating mechanisms, silencers, connectors and air sources. In this article UTMOST pneumatic actuated gate valve and pneumatic ball valve factory will introduce pneumatic actuated gate valve for you.
Pneumatic actuated gate valve is a commonly used terminal control element in industrial automation control system. Pneumatic ball valve adjusts the flowing medium to compensate the load flow and make the controlled process as close as possible to the set point required by the system design. On-off pneumatic valves are generally composed of pneumatic actuators, valves, solenoid valves, limit switches, air source processing components, manual operating mechanisms, silencers, connectors and air sources. The pneumatic knife gate valve manufacturers uses the purified compressed air of gauge pressure as the working pressure, pushes the piston, and drives the gate to move perpendicular to the fluid, so as to realize the purpose of opening and closing the valve.
The upper and lower pistons are simultaneously stressed, and driven by the upper and lower pistons, the valve stem overcomes the static friction between the sealing surface of the gate and the sealing surface of the valve body, driving the gate to rise. The compressed air reaches the lower chamber of the lower cylinder from the lower chamber of the upper cylinder, through the specific channel set in the partition plate, through the connecting pipe, and pushes the upper and lower pistons to work at the same time. The gas in the upper air chamber of the lower cylinder can be unhindered out of the cylinder block through another specific passage provided in the diaphragm.
After the gate valve is slightly opened, the lower piston runs to the top dead center. The piston then continues to lift, driven by the upper piston, until it reaches the fully open position. In the early stages of closing a pneumatic actuated gate valve: the gate valve leaves the fully open position and begins to descend under the push of the upper piston. In the later stage of shutter closing: when the upper piston hits the boss of the lower piston and drives the lower piston to continue to descend together, the descending speed is obviously slowed down due to the blockage of the intake passage of the upper air chamber of the lower cylinder and the outlet passage of the lower air chamber of the lower cylinder, so the shutter drops to the fully closed position. By slowing the downward impact of the head, the valve can close itself, the valve plate is not wedged too tightly, and the sealing surface can be protected from severe impact damage.
Flexible and reliable pneumatic-manual switching mechanism There is a pneumatic-manual switching mechanism on the upper part of the cylinder head, so that at any position during the opening and closing process of the gate valve, it is very convenient to turn the operating handle to switch directly from pneumatic to manual or from manual to pneumatic . The operating handle adopts a positioning pin type self-locking design, which is reliable and stable after the handle is positioned. If the solenoid valve, its control circuit or the gas supply system fails, it can be quickly switched to the manual operation state without other auxiliary tools to ensure the normal operation of the line and avoid accidents. Before the completion of the automatic control system of the new project, the pneumatic operated knife gate valve can be used reliably as a manual gate valve, and the action is flexible and brisk. The valve closing time is adjustable. By adjusting the buffer mechanism installed on the partition, the closing time of the shutter can also be adjusted within a certain range.
Since the pneumatic actuated gate valve can realize local control and remote centralized control, the main control room can control the switch of each valve, and equipped with limit switches as needed, the switch status can be displayed on the host computer, and does not need to be on site, high altitude or dangerous. The area is manually controlled, which greatly saves manpower, time and personnel costs.
