Quarter-Turn Pneumatic Actuator
The quarter-turn pneumatic actuator converts air pressure into angular displacement via rack & pinion, yoke or vane. It has double/single acting types, features wide torque range and easy connection, and is applied in power, metallurgy, etc.
Pneumatic actuators are classified by control mode into: on-off type and control type.
On-Off Type
Control Type
- On-off pneumatic actuators: The valve opens or closes when the solenoid valve is powered, and closes or opens when power is cut (explosion-proof types available).
- Control pneumatic actuators: Equipped with an electropneumatic valve positioner, they regulate the medium flow of the valve based on the magnitude of the current signal (standard 4-20mA) (explosion-proof types available).
- Pneumatic actuators are divided into single-acting and double-acting types.
- Double-acting pneumatic actuators: Normally closed (air-to-open, ATO), normally open (air-to-close, ATC).
- Single-acting pneumatic actuators: Normally closed (ATO), normally open (ATC).
Single-Acting Cylinder
Working principle: Single-acting cylinders feature spring return. The valve is initially closed (commonly called "air-to-open"). When air is supplied, the valve opens; if air supply is interrupted, the spring return function automatically resets and closes the valve. Typically used for corrosive liquid media or harmful gases, i.e., media that cannot leak.
Double-Acting Cylinder
Working principle: The valve requires air supply for both opening and closing. Commonly used in applications with low leakage requirements.
| Model | A | B | C | D | E | F | G | H | I | J | K | L | M | N | Z | 0 | Air Source Interface |
| AT52 | 30 | 41.5 | 65.5 | 72 | 92 | 65 | 30 | 80 | 036 | ∅50 | 4-M5x8 | 4-M6x10 | 11 | 14 | 147 | 40 | NAMUR G1/4" |
| AT63 | 36 | 47 | 81 | 87.5 | 107.5 | 72 | 30 | 80 | ∅50 | ∅70 | 4-M6x10 | 4-M8x13 | 14 | 18 | 168 | 40 | NAMUR G1/4" |
| AT75 | 42 | 53 | 94 | 99.5 | 119.5 | 81 | 30 | 80 | ∅50 | ∅70 | 4-M6x10 | 4-M8x13 | 14 | 18 | 184 | 40 | NAMUR G1/4" |
| AT83 | 46 | 57 | 98.5 | 108.7 | 128.7 | 92 | 30 | 80 | ∅50 | ∅70 | 4-M6x10 | 4-M8x13 | 17 | 21 | 204 | 40 | NAMUR G1/4" |
| AT92 | 50 | 58.5 | 111 | 116.5 | 136.5 | 98 | 30 | 80 | ∅50 | ∅70 | 4-M6x10 | 4-M8x13 | 17 | 21 | 262 | 40 | NAMUR G1/4" |
| AT105 | 57.5 | 64 | 122.5 | 133 | 153 | 109.5 | 30 | 80 | ∅70 | ∅102 | 4-M8x13 | 4-M10x16 | 22 | 26 | 268 | 40 | NAMUR G1/4" |
| AT125 | 67.5 | 74.5 | 145.5 | 155 | 185 | 127.5 | 30 | 130 | ∅70 | ∅102 | 4-M8x13 | 4-M10x16 | 22 | 26 | 301 | 55 | NAMUR G1/4" |
| AT140 | 75 | 77 | 161 | 172 | 202 | 137.5 | 30 | 130 | ∅102 | ∅125 | 4-M10x16 | 4-M12x20 | 27 | 31 | 390 | 55 | NAMUR G1/4" |
| AT160 | 87 | 87 | 184 | 197 | 227 | 158 | 30 | 130 | ∅102 | ∅125 | 4-M10x16 | 4-M12x20 | 27 | 31 | 458 | 55 | NAMUR G1/4" |
| AT190 | 103 | 103 | 216 | 230 | 260 | 189 | 30 | 130 | ∅140 | 4-M16x25 | 36 | 50 | 525 | 80 | NAMUR G1/4" | ||
| AT210 | 113 | 113 | 235.5 | 255 | 285 | 210 | 30 | 130 | ∅140 | 4-M16x25 | 36 | 50 | 532 | 80 | NAMUR G1/4" | ||
| AT240 | 130 | 130 | 264.5 | 290 | 320 | 245 | 30 | 130 | ∅165 | 4-M20x25 | 46 | 60 | 602 | 80 | NAMUR G1/4" | ||
| AT270 | 147 | 147 | 299 | 330 | 360 | 273 | 30 | 130 | ∅165 | 4-M20x25 | 46 | 60 | 722 | 80 | NAMUR G1/2" | ||
| AT300 | 162 | 173 | 330 | 354 | 384 | 312 | 30 | 130 | ∅165 | 4-M20x25 | 46 | 60 | 820 | 80 | NAMUR G1/2" | ||
| AT350 | 190 | 195 | 383 | 410 | 440 | 362 | 30 | 130 | ∅165 | 4-M20x25 | 46 | 60 | 900 | 80 | NAMUR G1/2" | ||
| AT400 | 260 | 260 | 441 | 466 | 496 | 450 | 30 | 130 | ∅165 | ∅254 | 4-M20x25 | 8-M16x25 | 46 | 60 | 940 | 80 | NAMUR G1/2" |
