The three-stage cylinder is a new product developed by our company by digesting and absorbing foreign advanced technology. It can meet the needs of petrochemical and other industries for pneumatic three-stage cylinders. The technical requirements of the shut-off valvehave filled the production gap of a domestic product. CylinderIt can switch between three positions of 0--45--90 degrees. With a solenoid valve, it can realize three-stage control of the shut-off valve. The three-stage type cylinder can pause once during the opening or closing process, and can accurately control the flow according to system requirements, especially suitable for chemical or oil industry in the product loading system.
Working principle of three-stage cylinder
1. In the closed position, solenoid valve 1 loses power, solenoid valve 2 loses power, air enters port B, and the valve is in a closed state (the central axis of the actuator and the execution device vertical);
2. Close - Fully open solenoid valve 1 is energized, air enters port A, and the actuator drives the valve to open (the central axis of the actuator is parallel to the actuator );
3. Fully open - half-closed solenoid valve 2 is energized, the auxiliary piston moves inward, solenoid valve 1 is de-energized, and the middle piston moves outward to Auxiliary piston limit position.
4. Fully closed position. When solenoid valve 2 loses power, the middle piston continues to move, driving the valve to the fully closed position.
Advantages and Characteristics of Three-stage Cylinder
1. Cylinder body, the inner surface is finely ground and finished. Advanced anti-corrosion technology is used inside and outside. The cylinder friction coefficient is small, long service life and corrosion resistance. Strong performance.
2. Double-piston rack-and-pinion design, compact structure, symmetrical installation position, easy to change the direction of the output shaft, long service life, and quick action.
3. The back of the piston rack is equipped with a composite bearing and guide ring, which has accurate movement, small friction coefficient and extended service life.
4. Combined preloaded coated spring with long working life.
5. High-precision gears and racks, with small meshing clearance, high precision and high output power.
6. Stainless steel fasteners, safe and beautiful, with strong corrosion resistance.
7. Adopt international standard dimensions: output shaft slot, screw hole;top mounting hole size conforms to NAMUR standard;air source interface size conforms to NAMUR standard;bottom installation The hole size complies withISO5211 standard for easy installationSolenoid valveLimit switch and other accessories.
8. Pneumatic actuator with rack and pinion structure. The products are widely used in various fields and are excellent driving devices for ball valves, butterfly valves, etc. with excellent quality. The products comply with NAMUR,ISO5211 standards, and the company and products have passed ISO9001:2000 and CE certification.
Three-stage cylinder adjustment
●Dry or lubricated air
●Stroke adjustment: The standard structure rotates at 90°C, with an adjustment range of +/-4° at both ends.
●Lubrication: The parts have been processed before leaving the factory, and there is no need to add additional lubrication and valve opening water sources during work.
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