In process industries such as oil and gas, and chemicals, pipeline control valves are critical components for ensuring efficient and safe system operation. However, traditional valves have long faced bottlenecks in high-temperature, high-pressure, large-diameter flow control, and adaptability to harsh environments: seal failure leading to leakage, limited control precision, and inadequate actuator protection causing unplanned downtime.The electric triple eccentric butterfly valve, equipped with debugging and positioning technologies, can effectively resolve these issues.
Technical Breakdown: What Makes it “Triple Eccentric”?
The “triple eccentric” structure is the foundation of the electric triple eccentric butterfly valve’s high performance. These three eccentricities are:
l Shaft Eccentricity: The valve stem axis is offset from the centerline of the sealing surface. This allows the disc to instantly separate from the seat during opening and closing, avoiding friction.
l Axis Eccentricity: The valve stem axis is tilted at an angle to the pipeline axis. This further reduces sliding friction in the sealing pair.
l Conical Seat Eccentricity: The sealing surface employs a tapered cone design. This ensures a wedging effect where the seal becomes tighter as the valve closes.
This geometric design of triple eccentricity achieves “zero friction” during the valve’s operation in principle. It not only significantly extends service life but also maintains tight metal-to-metal sealing under high-temperature (≤250°C) and high-pressure (≤16 Bar) conditions, achieving true zero leakage.
Dual Assurance of Precision and Reliability: DDS and PPD Technologies
Beyond the innovative sealing structure, the precision and long-term stability of valve control are equally crucial. GRAT integrates two core technologies into its electric actuators—DDS debugging technology and PPD positioning technology—enhancing control quality at its root.
l DDS Direct Debugging Technology: This technology revolutionizes the traditionally cumbersome mechanical positioning process. Instead of requiring repeated manual adjustments of cams and screws, the DDS(Direct Debugging Switch) technology allows for precise calibration of both electrical and mechanical positions in one step, simply by rotating the knob on the top dial. This drastically reduces debugging time and minimizes the risk of human error, ensuring the valve quickly returns to its optimal working state after each installation.
l PPD Positioning Device: As a patented GRAT technology, the PPD(Potentiometer Positioning Device) fundamentally changes the traditional method of fixing potentiometers with tension springs. By optimizing the structure, the PPD device uses minimal torque to achieve a tight connection between the potentiometer and the mechanical assembly. This eliminates gear transmission backlash, significantly improving signal sampling accuracy and device lifespan. This ensures the electric triple eccentric butterfly valve maintains a flow error rate of less than 1% even during long-term operation.
Efficient Operation in a Saudi Oil Pipeline Project
The technical advantages of the GRAT electric triple eccentric butterfly valve were clearly demonstrated in a Saudi Arabian oil pipeline project. The project required valves to provide precise flow control for large-diameter DN600 pipelines in an environment with constant sandstorms and high temperatures, while maintaining a seal under long-term exposure to 250°C and 16 Bar pressure.
GRAT supplied DN600 triple eccentric butterfly valves. Their metal sealing structure achieved complete “zero leakage” under the high temperature and pressure. The integrated actuators, with an IP67 protection rating, proved immune to sand and moisture erosion. Crucially, leveraging the high-precision signal feedback from the PPD technology and the rapid, accurate debugging ensured by DDS technology, the valves achieved a stable flow control error rate of less than 1% in actual operation, greatly enhancing process efficiency. This project not only achieved a “zero failure” operational record but also reduced the client’s maintenance costs by approximately 40%, validating the exceptional reliability of GRAT products in extreme operating conditions.
Driving the Industrial Future with Innovative Technology
The GRAT electric triple eccentric butterfly valve is not merely a combination of components. It is a systematic solution based on a deep understanding of industrial pain points, integrating the triple eccentric sealing principle with intelligent debugging and high-precision positioning technologies. From principle innovation to field verification, we are committed to delivering safer, more efficient, and more reliable control equipment for the global process industries through solid technological innovation.
Under the guiding spirit of the “Belt and Road” initiative, GRAT is ready to contribute the robust capability of Chinese manufacturing to support the upgrade of global energy and chemical infrastructure. We aim to work hand-in-hand with industry partners to advance towards a smarter, more sustainable industrial future.
Your message must be between 20-3,000 characters!
