Next-generation valve actuation

Compact electrohydraulic CAI EH/VH control actuators

In line with the ongoing development of our compact electrohydraulic actuators for power-operated valves, we have created an actuator for control valves featuring a new technology that is reliable and precise, eliminating the need for positioners or compressed air.

> ELECTRICAL	Eliminates the old generation of electro-pneumatic valve positioners
> PRECISE	Repositioning accuracy of ± 2/100 mm without hysteresis
> COMPACT	Following the CAI EH/VH block technology
> POWERFUL	Utilization of hydraulic energy up to 250 bar max
> SAFETY	Integrated safety function
> RELIABLE	The system's simplicity and the quality of components make the CAI EH/VH actuator easy to install and safe to use

Presentation and Operating Principle

a. MANIFOLD (drilled block) ensuring the function

Regulation by 4-20 mA servovalve (version ± 10V, ±30V, ±50V available on request)
Management of pressures and speed in OPEN and CLOSE directions
Management of speed for safety function
Pressure ports for operational verification
Hydraulic manual control (optional)

*No external piping connections

b. Regulation Loop*

Position sensor (internal or external)
Electronic module for position sensor management
Parameter adjustment and reading module via Bluetooth (optional)
Servovalve/sensor management module
Fieldbus interface module (HART, PROFIBUS, PROFINET, etc.)

*Option for local or remote control (control room for ATEX version)

c. Technical Specifications

Refer to previous section "Electrohydraulic actuators"

d. Actuator Definition

Motorized Valves

Following a partnership agreement with a European control valve manufacturer, we can now supply motorized valves for On-Off or Control applications.