Hydraulic Part-Turn Actuators 90° | Sander Marine

Sander Marine hydraulic part-turn actuators are designed for the operation of 90° quarter-turn valves, primarily butterfly valves and ball valves, in marine and industrial applications. Developed by Sander Marine’s engineering department and manufactured in-house, the actuators are designed for long service life and low-maintenance operation.

The range is available in double-acting and spring-return configurations, with spring-to-close or spring-to-open operation depending on the required fail-safe function. The modular actuator design allows conversion between double-acting hydraulic and spring-return configurations to suit different operating requirements.

The actuators provide constant torque output throughout their operating range and can be installed in various mounting positions. Adjustable rotation limits allow accurate setting of the valve travel, while the internal hydraulic piping reduces the exposure of external oil lines and the risk of mechanical damage.

Valve mounting is provided through combined flanges according to ISO 5211, while the NAMUR interface allows the installation of commonly used limit switches and position indicators. Hydraulic connections and control blocks are standardised throughout the actuator range, simplifying installation, maintenance and system integration.

For emergency manual operation, an additional hand pump can be connected to the hydraulic control block through a quick coupling. Versions with an intermediate gearbox for manual emergency operation are also available.

The SHA/DA-32 to SHA/DA-63 actuator sizes feature a single-piston design, while the SHA/DA-70 is equipped with a double-piston arrangement.

Main Features

• Compact design and low weight

• Constant torque output

• Modular actuator construction

• Double-acting and spring-return configurations

• Spring-to-close or spring-to-open operation

• Suitable for various installation positions

• Adjustable rotation limits

• Internal hydraulic piping

• Standardised hydraulic connections throughout the actuator range

• Common hydraulic control blocks for different actuator sizes

• Valve mounting flanges according to ISO 5211

• NAMUR interface for limit switches and position indicators

• Emergency manual operation via an additional hand pump

Available Special Configurations

Sander Marine hydraulic actuators can also be supplied with:

• Limit switch boxes in IP67, IP68 or Ex versions

• Spring-to-close or spring-to-open configurations

• Emergency manual operation through an intermediate gearbox

• Application-specific hydraulic control blocks

• Direct connection to a local hydraulic power unit

• Separate installation of the hydraulic control block

• Special versions for submerged operation or demanding installation conditions, depending on the application