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The DVC6200 is a type of positioner that uses a technology called “Dicrotic Valve Control” (DVC). The principle of the DVC6200 positioner is based on the use of a piezoelectric element to control the movement of a valve stem, allowing for precise and repeatable positioning of a valve.
Here’s a simplified explanation of the principle:
1. Piezoelectric element: The DVC6200 positioner uses a piezoelectric element, typically a ceramic or quartz material, which changes its shape when an electric voltage is applied to it. When an electric field is applied, the piezoelectric element expands or contracts in a linear fashion.
2. Valve stem movement: The piezoelectric element is connected to the valve stem, which is connected to the valve plug. When the piezoelectric element expands or contracts, it applies a force to the valve stem, moving it in or out of the valve body.
3. Positioning: The positioning of the valve plug is controlled by the amplitude and frequency of the electric signal applied to the piezoelectric element. By adjusting the signal, the positioner can precisely move the valve plug to a specific position within the valve body.
4. Feedback control: The DVC6200 positioner uses feedback control to ensure accurate positioning. A sensor monitors the valve stem movement and adjusts the electric signal to maintain precise positioning.
5. Fast and precise movement: The DVC6200 positioner can move quickly and accurately due to its piezoelectric technology, allowing for fast opening and closing times.
The advantages of the DVC6200 positioner include:
* High precision: Precise positioning ensures accurate control over process conditions
* Fast movement: Quick opening and closing times reduce cycle times and improve process efficiency
* Low power consumption: Piezoelectric technology requires low power consumption, reducing energy costs and heat generation
* Maintenance-free: The DVC6200 positioner has no moving parts, reducing maintenance needs and increasing reliability
The DVC6200 positioner is commonly used in various industrial applications, such as in chemical processing, oil and gas, power generation, and pharmaceutical manufacturing.
