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Spring return scotch yoke pneumatic actuator for valves operates using compressed air to generate motion, while an internal spring provides the return mechanism when air pressure is released. In low-temperature versions, special materials and lubricants are used to ensure smooth operation even in sub-zero conditions.
Wide Temperature Range: Operates reliably from -40°C to +80°C (or lower, depending on design).
Fail-Safe Operation: Spring return ensures a safe default position in case of air supply failure.
Corrosion Resistance: Special coatings and materials prevent icing and chemical degradation.
High Torque/Force Output: Maintains performance even in cold environments.
Low temperature Spring return scotch yoke pneumatic actuator for valves are essential in industries where freezing conditions are common, such as:
Oil & Gas – Cryogenic processing, LNG plants, and Arctic pipelines.
Chemical & Petrochemical – Handling refrigerated gases and liquids.
Food & Beverage – Freezer storage and cold-chain logistics.
Power Plants – Cooling systems and cryogenic applications.
Reliability in Extreme Cold – Unlike standard actuators, which may seize or slow down, low-temperature Scotch yoke pneumatic actuator for valves models ensure consistent performance.
Reduced Maintenance – Specialized seals and lubricants minimize wear in harsh conditions.
Safety Compliance – Spring return scotch yoke pneumatic actuator meets industry standards for fail-safe operation in critical processes.
Spring return scotch yoke pneumatic actuator Specification：
Comply to UNI EN 15714-3:2009 standard
ISO connection standard：UNI EN ISO 5211。
Auxiliary connectioin：NAMUR,VDI/VDE3845
Control angle：90°(-5°~+3°)。
Torque：Relative to control pressure and type.
Spring return scotch yoke pneumatic actuator Working Condition：
Operation temperature：-50℃~+60℃
Pressure：2-8bar
Operating Medium：Filtered compressed air dry or lubricated.The pressure condensation point in accordance with (ISO 8573-1:2010, Class 3) has to be 10℃ under ambient temperature.
The maximum particle size in accordance with (ISO 8573-1:2010, Class 5) should not exceed 40 µm.
Spring return scotch yoke pneumatic actuator Benefits：
1. Modular spring pack According to different air pressure with different spring combination, low stress spring design can effectively extend the service life of the spring. 2.Corrosion-resistant connectors All connection bolts are stainless steel with good corrosion resistance 3.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. 4.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. 5.Shaft bearing Prevent direct contact between shaft and cylinder body, ensure the positioning accuracy of drive shaft, reduce friction loss, make the spring return scotch yoke pneumatic actuator efficient operation. 6. Piston bearing Ensure the positioning accuracy of the piston, so that the piston can be smooth and smooth operation, prevent shifting. 7. 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. |
Part Number and Material：
Schedule：
Pos | Description | Spring Return Scotch Yoke Pneumatic Actuator 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 | NBR |
13 | Lower shaft O-ring | NBR |
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 | NBR |
20 | Piston support chip | Crystalline Polymer |
21 | Connection plate O-ring 2 | NBR |
22 | Connection plate 2 | Aluminium Alloy |
23 | Plate socket screw 2 | Stainless Steel |
24 | Cover socket screw | Stainless Steel |
25 | Nut O-ring | NBR |
26 | screws | Stainless Steel |
27 | End Cover Seal Ring | NBR |
28 | Cover | Aluminium Alloy |
29 | Spring | Spring Steels |
30 | Lower Spring Washer | Aluminium Alloy |
31 | Spring Shaft | Stainless Steel |
Note: 1)180-260 body is split type.
2)140-260 not included.
Above illustration for internal structure demonstration only,not for all models and parts.
KANEDE CONTROLS. produces high quality solutions for pneumatic and electric valve automation.
E-mail: support@kanede.com
Tel: 0086-519-85557268
Fax: 0086-519-85557368
Add: No. 206 Yuntaishan Road., Xinbei District, Changzhou, Jiangsu province, China
