Valve Position Indicator
The Valve Position Indicator (VPI) is a dedicated position feedback device designed to provide accurate and reliable indication of valve actuator position in marine and offshore applications. The system is particularly suited for installations where direct observation of the actuator is impractical or impossible, including submerged and inaccessible locations.
Description
The VPI operates by measuring hydraulic oil displacement through an internal gear wheel mechanism coupled to a precision 3-wire potentiometer. As the actuator moves, the displacement of hydraulic oil is translated into a corresponding position signal, enabling continuous monitoring of valve status and actuator position. This design ensures dependable feedback for both submerged and non-submerged valve installations. For applications requiring only local visual indication, the Local Indicator version utilizes hydraulic pressure to mechanically switch the display between OPEN and CLOSE positions, providing clear status confirmation without the need for electrical signaling.
Applications
- Ballast valve monitoring
- Remote valve control systems
- Hydraulic actuator position feedback
- Cargo transfer systems
- Bilge systems
- Offshore process systems
- Submerged valve installations
- Marine automation systems
Key Features
- Accurate valve position feedback
- Continuous actuator position monitoring
- Oil displacement measurement principle
- Integrated gear wheel sensing mechanism
- 3-wire potentiometer output
- Suitable for submerged installations
- Suitable for non-submerged installations
- Compatible with hydraulic valve actuators
- Local indication option available
- Robust design for marine environments
Operating principle
The Valve Position Indicator measures actuator movement by monitoring hydraulic oil displacement within the actuator system.
- Hydraulic oil flow drives an internal gear wheel mechanism.
- The gear wheel is mechanically connected to a precision 3-wire potentiometer.
- Actuator movement is converted into an electrical position signal.
- The signal provides continuous feedback of valve position to the vessel's control or monitoring system.
- Suitable for both remote monitoring and automation applications.
Local indicator option
The Local Indicator provides a simple visual confirmation of valve status at the installation site.
- Operates using internal hydraulic pressure.
- Displays OPEN or CLOSE position locally.
- No remote signal transmission required.
- Ideal for submerged or difficult-to-access valve locations.
Benefits
- Reliable valve position feedback
- Supports remote monitoring and control systems
- Suitable for harsh marine environments
- Enables monitoring of submerged actuators
- Improves operational awareness and safety
- Compatible with vessel automation systems
- Flexible solution for local and remote indication requirements
Typical Areas of Use
- Ballast water management systems
- Cargo handling systems
- Fuel transfer systems
- Hydraulic valve control systems
- Offshore installations
- Marine automation and monitoring networks