• DA 22-SUB
    DA 22-SUB
  • DA 26-SUB
    DA 26-SUB
  • DA 26-90
    DA 26-90
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Underwater

As a result of close cooperation with companies such as Vehicle Control Technologies Inc., US experts for unmanned underwater vehicles, we have acquired a great deal of experience in deep-sea applications. From pressure-proof housings to oil filling - we can meet all your needs.


DA 22-SUB

24 to 30 volts


We developed an underwater version, the DA 22-SUB, based on the DA 22 actuator. The DA 22-SUB is waterproof down to a depth of 100 meters (10 bar / 145 psi).

The housing is CNC machined from marine bronze (DIN 1705 R65/MIL B24480). The integrated overload coupling (ISS system) protects the solid-steel gear train from every kind of radial shock loads.

The standard version (PWM) of the DA 22-SUB comes equipped with analog position feedback and an integrated moisture and temperature sensor. Every actuator is tested in our test lab for six hours in a pressure tank under various atmospheric pressures (0 to 15 bar). Customized variants on request.



Matlab Simulink Model on request


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DA 26-SUB

24 to 30 volts


The DA 26-SUB is a modified version of the well proven DA 26 and is designed to operate in an oil-filled environment. It has successfully been tested and operated at depths of 6000 m / 19600 ft. The housing is coated to withstand hundreds of hours of saltwater exposure.



Matlab Simulink Model on request


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DA 26R-30-5024

24 to 30 volts


Based on our DA 26 actuator, we have developed a special underwater actuator for great depths.

The oil-filled actuators can be exposed to extreme pressure conditions. Customers have already deployed our DA 26R-30-5024 at depths down to 2000 m / 6600 foot.

To guarantee maximum safety and reliability, our DA 26R-30-5024 includes a brushless motor drive and a contactless, wear free rotary encoder. This ensures maximum service life with the greatest possible power delivery. The housing is CNC machined from marine bronze (DIN 1705 R65/MIL B24480); optionally, a less expensive variant made of specially coated, saltwater-resistant aluminum is also available that can be effectively used without an oil filling even above water.

A prominent feature here is a 90° angled, self-locking output drive that is ideal for special linkages and which does not draw any current due to its self-braking with constant positioning under load! There is a hose adapter on the bottom of the housing for filling the actuator with oil after opening the venting screw.

The DA 26R-30-5024 series can be equipped with a standard PWM input (pulse width modulation) that has two different interfaces: a differential, galvanic isolated interface (opto-coupler) and a signle-ended interface with CMOS levels that is also used to program the servo parameters. Analog position feedback to detect the drive shaft position. A differential RS-422 PWM interface can be chosen instead of the opto-coupled interface.

The DA 26R-30-5024 with digital serial command interface (RS-485) receives its commands via a CRC secured protocol. It can return not only the shaft position in digital format, but also several diagnostic data such as the level of the supply voltage, current consumption and the temperature of the motor and electronics in digital form (optionally also the humidity within actuator case). These kind of diagnostic capabilities help to determine the health state of the actuators before, during and after deployment.

The fully programmable electronics of the DA 26R-30-5024 provides, for instance, protection against overloading and incorrect polarity.

Optional:  RS-485 compatible, asynchronous serial command interface. Customized commands can be implemented on request.  Redundant RS-485 interface with redundant power supply, RS-422 level compatible, differential PWM interface instead of the opto-coupler PWM interface. Humidity sensor (only in for RS-485 interface versions



Matlab Simulink Model on request


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© 2019 Volz Servos
© 2019 Volz Servos