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Piston actuator in heavy-duty design for mounting on valves with a linear stem movement (globe valves, diaphragm valves and gate valves). Actuator flange to DIN/ISO 5210. Available in single-acting spring-to-close or spring-to-open design, or double-acting air-to-open/air-to-close design; suitable for mounting limit switches or positioners to suit customer requirements, factory-mounted. Settings are adjusted during factory test run.
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Technical Data

  • Max. allowed fluid temperature80 °C

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  • Actuators with optimised stroke variants ensure full valve travel with minimum air consumption
  • Smooth, low-friction movement of the piston assembly with double cup seal or low-friction piston ring

Technical Data

  • Drive conceptWith pneumatic actuator
  • Group functionDrive
  • Max. allowed fluid temperature80 °C

Sectional Drawings


TitleFormatSizeLast change
ISO 45001 certificate (8630.8559_EN)PDF0.137/7/2021
ISO 14001 certificate (8630.8558_EN)PDF0.157/7/2021
ISO 9001 certificate (8630.8560_EN)PDF0.157/7/2021
TitleFormatSizeLast change
ATEX-Declaration by the manufacturer (8630.8501_EN)PDF0.564/19/2021
TitleFormatSizeLast change
Operating Manual (0570.821_EN)PDF3.437/17/2021
Installation instructions (0570.823_EN)PDF2.714/19/2021
TitleFormatSizeLast change
Type series booklet SISTO-LAP (9210.1_EN)PDF3.514/19/2021