The HyRAV SG & Flex series of rotary actuators form a complete series of dual-acting or spring-return rotary units which work according to the helical gear principle.The compact and concentric fitting on the valve has proven to be effective in practice and the unit is both space-saving and reliable.
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Pleiger Maschinenbau offers Electro-Hydraulic and Conventional Hydraulic Quarter Turn and Globe Valve Actuators and Control Systems. 

First in offering Electro-Hydraulic actuators to the marine industry, they are a standard for many applications. Ballast Control Systems benefit from the option of utilizing virtually no hydraulic lines, when incorporating electro-hydraulic technology. READ MORE

The VAMP (ValvACT Actuator Mounted Power) system is an actuator mounted hydraulic power pack designed for quarter-turn actuators. It can be supplied with Eckart HyRAV SG hydraulic actuators for reliable performance with both dual-acting and spring-return, fail-safe options. Additionally, VAMP can be applied to similarly styled hydraulic actuators from other manufacturers.s. READ MORE