Valve Plunger Set-Up Procedure for Mechanical Loading Reduction
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Solution Overview
Problem
Existing valve control methods fail to minimize mechanical loading between the valve plunger and seat, particularly with elastomeric seals, leading to increased energy consumption and reduced service life.
Innovation Solution
A method and valve design that involves a set-up procedure to detect a precise first closed position, applying an additional force to achieve a second closed position with minimal force, using sensors and a controller to optimize the closing process, and allowing for automatic or manual adjustments based on operating conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the valve plunger is rotated back to reduce mechanical loading, then the mechanical loading between valve plunger and seat is reduced, but the flow measurement precision and closing reliability deteriorate
Solution Approach 1:
The valve performs a set-up procedure before normal operation to detect and store the optimal first closed position. During this preliminary action, the valve learns the precise position where closing force is minimized while maintaining reliable closure, eliminating the need to rotate back during normal operation.
Solution Approach 2:
The valve uses flow measurement feedback to detect when the valve is properly closed. By monitoring flow values and comparing them against thresholds, the system can precisely determine closure status and adjust the valve position accordingly, maintaining both low mechanical loading and high measurement precision.
2Reliability
If the valve plunger is moved beyond the closed position to apply additional force, then the closing reliability is improved, but the energy consumption increases
Solution Approach 1:
The set-up procedure performs preliminary detection of the optimal closed position before normal operation. This advance preparation allows the valve to reach the precise closing point without needing to overshoot and apply excessive force during regular operation, thereby reducing energy consumption while maintaining reliability.
Solution Approach 2:
The system changes the control parameter from a fixed overshoot distance to a dynamically determined optimal position based on flow measurement feedback. This parameter adaptation allows the valve to apply only the necessary closing force, minimizing energy consumption while ensuring reliable closure.
3Ease of operation
If the valve uses a fixed closed position, then the control simplicity is maintained, but the mechanical loading and energy consumption increase
Solution Approach 1:
The valve performs self-adjustment through an automated set-up procedure that detects and stores its own optimal closed position. This self-service capability eliminates the need for manual calibration or complex external control systems, maintaining ease of operation while optimizing mechanical loading and energy consumption.
Solution Approach 2:
The valve uses internal flow measurement feedback to automatically determine and store the optimal closed position during the set-up procedure. This feedback mechanism enables the valve to adapt to its specific characteristics without external intervention, maintaining control simplicity while reducing mechanical loading and energy consumption.
Data Source
AI summary
A method of controlling a valve plunger of a valve makes provision that, prior to the operation, the valve individually runs through a set-up procedure on the basis of a detected closed position, in which set-up procedure the valve plunger exerts an additional force in the direction of the valve seat beyond a detected closed position. The corresponding valve is equipped with an integrated valve controller which performs a corresponding set-up procedure automatically prior to the operation.