Structure: Scotch Yoke Type
Type: heavy duty
Temperature: Ordinary Temperature
Acting Type: Spring Return
Operation: Double Acting ;Single Acting
Applicable Media: Water, Oil, Gas, Nitric Acid, Acetic Acid
Keyword: Scotch Yoke Pneumatic Actuator
0Structure: Scotch Yoke Type
Type: heavy duty
Temperature: Ordinary Temperature
Acting Type: Spring Return
Operation: Double Acting ;Single Acting
Applicable Media: Water, Oil, Gas, Nitric Acid, Acetic Acid
Keyword: Scotch Yoke Pneumatic Actuator
1). Hydraulic Actuator Oil Supply Pressure: Up to 100 bar ( 1449psi )
2). Pneumatic Actautor Air Supply Pressure: Up to 10 bar ( 116psi )
3). Output Torque: Up to 160000 Nm ( 11790261 bf-in )
4). Temperature Range:
Standard: -20°C ~ +80°C
Low Temperature: -40 °C~ +80°C
High Temperature: -20 °C~ +120°C
5). Type: Double Acting, Single Acting ( Spring Return ) 6). Optional accessories: solenoid valves, limited switch, electric position
7). Lubrication: All the moving parts are coated with lubricants, extending their service life
Scotch Yoke Pneumatic Actuator Functions and Accessories
Double acting pneumatic actuator: two-position control of valve opening and closing.
Spring reset type: when the circuit or gas line is cut off or there is a fault, the valve automatically opens or closes.
Single electric solenoid valve: the valve opens or closes when the power is supplied, and closes or opens when the power is off (explosion-proof type scotch yoke pneumatic actuator is available).
Double electric solenoid valve: the valve opens when one coil is energized, and the valve closes when the other coil is energized, with memory function (explosion-proof type is available).
Limit switch feedback device: long-distance transmission of valve switch position signal (explosion-proof type is available).
Electrical positioner: according to the current signal (standard 4~20mA) size, the medium flow of the valve is regulated and controlled. (Explosion-proof type scotch yoke pneumatic actuator is available).
Pneumatic positioner: according to the air pressure signal (standard 0.02~0.1Mpa) size, the medium flow of the valve is regulated and controlled.
Electrical converter: converts the current signal into an air pressure signal, and is used in conjunction with the pneumatic positioner (explosion-proof type scotch yoke pneumatic actuator is available).
Air source processing triplex: including air pressure reducing valve, filter, oil mist collector, which can stabilize the air source pressure, clean and lubricate the moving parts.
Manual operation mechanism: automatic control can be operated manually under abnormal conditions.
Scotch Yoke pneumatic actuator Benefits:

1.Corrosion-resistant connectors All connection bolts are stainless steel with good corrosion resistance 2.Piston ring The piston guide ring, made of ultra high molecular polymer, has an extremely low coefficient of friction, while the material has high hardness and excellent wear resistance, providing precise guidance and long service life. 3.Body The cylinder body is processed with high precision and anodized. The thickness of the oxide layer is more than 20μm. It has low friction coefficient and excellent anti-corrosion and wear resistance. 4.Shaft bearing Prevent direct contact between shaft and cylinder body, ensure the positioning accuracy of drive shaft, reduce friction loss, make the scotch yoke pneumatic actuator efficient operation. 5. Piston bearing Ensure the positioning accuracy of the piston, so that the piston can be smooth and smooth operation, prevent shifting. 6. Pin connection The fork and the drive shaft are connected by pins to ensure that the fork and the drive shaft run synchronously. At the same time, the pins also play a role in preventing the drive shaft from flying out, which is a reliable and safe design. |
Scotch yoke pneumatic actuator Part Number and Material:

scotch yoke pneumatic actuator Schedule:
Pos | Description | Material |
1 | Cylinder 1 | Aluminium Alloy |
2 | Piston | Aluminium Alloy |
3 | Shaft | Alloy Steel |
4 | Yoke | Alloy Steel |
5 | Piston pin | Alloy Steel |
6 | Yoke pin | Alloy Steel |
7 | Bearing | Alloy Steel |
8 | Upper circlip | Stainless Steel |
9 | Lower circlip | Stainless Steel |
10 | Upper washer | Crystalline Polymer |
11 | Lower washer | Crystalline Polymer |
12 | Upper shaft O-ring | FKM |
13 | Lower shaft O-ring | FKM |
14 | Upper shaft bearing | Crystalline Polymer/Graphite Copper Bushing |
15 | Lower shaft bearing | Crystalline Polymer/Graphite Copper Bushing |
16 | Upper piston bearing | Crystalline Polymer |
17 | Lower piston bearing | Crystalline Polymer |
18 | Piston ring | Crystalline Polymer |
19 | Piston O-ring | FKM |
20 | Piston support chip | Crystalline Polymer |
21 | Connection plate O-ring 2 | FKM |
22 | Connection plate 2 | Aluminium Alloy |
23 | Plate socket screw 2 | Stainless Steel |
24 | Cover socket screw | Stainless Steel |
25 | Nut O-ring | FKM |
26 | screws | Stainless Steel |
27 | End Cover Seal Ring | FKM |
28 | Double Acting End Cover | Aluminium Alloy |
29 | Set Screw | Stainless Steel |
Note: 1)180-260 scotch yoke pneumatic actuator body is split type.
2)140-260 not included.
Above illustration for internal structure demonstration only,not for all scotch yoke pneumatic actuator models and parts.
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Add: No. 206 Yuntaishan Road., Xinbei District, Changzhou, Jiangsu province, China