Description
AUTOMA Pneumatic Actuator Heavy Duty Type (AD Series)
The AUTOMA Pneumatic Actuator Heavy Duty Type (AD Series) is a high-performance pneumatic actuator designed to operate large industrial valves such as ball valves, butterfly valves, plug valves, and other torque-demanding equipment. Built for maximum strength and durability, the AD Series is engineered to deliver consistent, high-output torque, even under extreme pressure, temperature, and corrosive conditions.
This makes it ideal for industries such as oil & gas, petrochemical, power generation, marine engineering, mining, and water treatment—where reliability is non-negotiable.
Model Name
- AD250D
- AD300D
- AD350D
- AD400D
Features
- Scotch-Yoke Type
- Powder Coating
- ISO 5211, DIN 3337
- Use Honing Pipe
Specification
| Item | AD250D | AD300D | AD350D | AD400D | ||||||||
| Operating Type | Scotch – Yoke | |||||||||||
| Operating Media | Compressed Dry Air | |||||||||||
| Operating Pressure | 4 ~ 7kg/cm2 | |||||||||||
| Rotating Angle | 90° ±5° | |||||||||||
| Operating Temperature | -20°C ~ 80°C(Option : -40°C ~ 200°C) | |||||||||||
| Weight(kg) | 130 | 230 | 330 | 450 | ||||||||
Part & Material

| No. | Part Name | Materials | No. | Part Name | Materials |
| 1 | Body | Steel Alloy | 16 | Piston Rod O-ring | NBR |
| 2 | Shaft | Steel Alloy | 17 | Cylinder | Steel Alloy |
| 3 | Shaft O-ring(Bottom) | NBR | 18 | Cylinder Guide Bolt | Steel Alloy |
| 4 | Shaft Bush | Engineering Plastic | 19 | Piston | Steel Alloy |
| 5 | Shaft O-ring(Top) | NBR | 20 | Piston O-ring | NBR |
| 6 | Yoke | Steel Alloy | 21 | Piston Fixing Washer | Stainless Steel |
| 7 | Yoke Block | Steel Alloy | 22 | Piston Fixing Bolt | Stainless Steel |
| 8 | Body Cover | Steel Alloy | 23 | Cylinder Cover(Out) | Steel Alloy |
| 9 | Body Cover Bolt | Stainless Steel | 24 | Holder | Steel Alloy |
| 10 | Piston Rod | Steel Alloy | 25 | Cylinder Cover Washer(Out) | Stainless Steel |
| 11 | Piston Rod Bush | Engineering Plastic | 26 | Cylinder Cover Bolt(Out) | Stainless Steel |
| 12 | Cylinder Cover Bolt(In) | Stainless Steel | 27 | Stopper Washer | Stainless Steel |
| 13 | Cylinder Cover Washer(In) | Stainless Steel | 28 | Stopper Nut | Stainless Steel |
| 14 | Cylinder Cover(In) | Steel Alloy | 29 | Stopper Bolt | Stainless Steel |
| 15 | Cylinder Bolt | Stainless Steel |









