Pneumatic valve working principle
After the gas enters the cylinder, the valve closes. When the gas is exhausted, the spring opens the valve with the piston. The edible structure is open. Be careful not to compress the spring for a long time and lose its function. According to the principle of pneumatic switch, double action pneumatic valve needs two five-way solenoid valve. The gas from air port A enters the cylinder, rotates the piston, closes the torque valve, opens the valve, and the gas enters from air port B. At the same time, port A is opened.
Pneumatic valve refers to the compressed air into the air actuator, driving the piston, through the rotation or lifting of the torsional shaft to drive the valve shaft of the air control valve. There are three kinds of pneumatic valves: single action, double action and intelligent adjustment. In the single action pneumatic actuator, according to two principles, the spring-driven piston structure is open and normally closed. Both are air on or air off. This principle is often turned off in springs when no gas enters. After the gas enters the cylinder, the valve closes. When the gas is exhausted, the spring opens the valve with the piston. The edible structure is open. Be careful not to compress the spring for a long time and lose its function. According to the principle of pneumatic switch, double action pneumatic valve needs two five-way solenoid valve. The gas from air port A enters the cylinder, rotates the piston, closes the torque valve, opens the valve, and the gas enters from air port B. At the same time, port A is opened.
The role of pneumatic valve positioning:
The intelligent valve is positioned on the pneumatic actuator, and the 2-bit 5-way solenoid valve is used in combination. When the need to adjust and control the flow of medium, can be positioned by positioning 4 ~20mA due to the regulator, the stem is in the middle stage, affecting the flow resistance. When THE STEM IS IMMERSED IN MEDIUM FOR A LONG TIME, STAINLESS STEEL OR GOOD MATERIALS MUST BE SELECTED AS SEVERAL HIGH PRESSURE AND CORROSIVE FLUID media TO AVOID STEM distortion AND corrosion. In the case of insufficient air pressure, the pneumatic valve can not be effectively opened and closed by air pressure control. Please add manual accessories to more demanding engineering and hazardous systems.
Pneumatic valve accessories:
The triple connector of the pneumatic valve includes air filter, pressure reducing valve and oil mist. According to the requirements of the situation, the air valve has accessories, positioning, proportional valve, limit switch, travel switch, 2-position 5-way solenoid valve and transmission.
Pneumatic valve selection:
Pneumatic valve used to cut off the medium, the whole cycle directly open. At this point, the pressure loss of the medium operation is small. Gate valves are usually used without frequent opening or closing to keep the gate fully open or closed, open or closed.
The valve shaft of the pneumatic shut-off valve is perpendicular to the sealing face of the valve seat, the opening and closing stroke of the valve stem is short, and the cutting action is very reliable. It is suitable for cutting, adjusting and throttling. When THE VALVE IS OPENED, THE VALVE SEAT LOSES CONTACT WITH THE VALVE SEALING SURFACE, RESULTING IN VERY RELIABLE OPEN CIRCUIT ACTION FOR SHIELDING, REGULATING AND THROTTLING AS A MEDIUM.
Pneumatic valve butterfly valve plate is installed in the direction of pipe diameter. In the cylinder channel of the butterfly valve body, the disc butterfly valve plate rotates around the axis, and the rotation Angle is 0~ 90. After rotating to 90, the valve is in a fully open state, which can be used as a switch and coarse adjustment. Pneumatic valve body is evolved from the plug valve. In addition to the plug body for the ball outside, there is a circular through hole or channel through its axis for the same rotation of 90 degrees of lifting action. The ratio of the sphere to the channel opening is, when the ball rotates 90 degrees, the inlet and outlet are all spherical, and the flow rate needs to be cut off or adjusted.
