Wuhan Grat Control Valve Co., Ltd.

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.

Application Background With the rapid global development of the photovoltaic industry, higher requirements have been placed on the production efficiency and quality stability of core materials such as silicon wafers. In the silicon wafer production process, the temperature control accuracy of the heat exchanger system directly affects the quality and energy consumption of the final product. A photovoltaic material manufacturer needed to precisely and rapidly linearly regulate the flow of thermal oil in its heat exchangers to achieve stable control of the process temperature. To meet this need, GRAT provided an Electric V-Port Control Ball Valve solution, fulfilling the customer’s core requirement for system control precision with its exceptional regulating performance. Operating Conditions Parameter Specific Condition Application Heat Exchanger for Photovoltaic Material Production Medium Thermal Oil Product GRAT Electric V-Port Control Ball Valve Size DN25 Body SUS204 Stainless Steel Seal PTFE (Polytetrafluoroethylene) Medium Temperature ≤ 120°C Control Signal 4-20mA / 0-10V (Compatible Inputs) Power Supply AC220V / 50Hz Product Advantages & Features Addressing the high demands for temperature control in this project, the GRAT Electric V-Port Control Ball Valve demonstrated the following core advantages and characteristics: High-Precision Regulation and Control V-Port Design: The ball features a unique V-shaped notch that forms a precise equal percentage characteristic with the seat, correlating flow rate to valve opening. This allows stable operation even at minimal openings and enables precise flow control, effectively avoiding the instability common in standard ball valves at low openings. It is particularly suitable for applications requiring continuous, precise flow regulation. Excellent Sealing and Durability PTFE Seals: The valve seat uses reinforced PTFE material, offering excellent chemical inertness and self-lubrication. This ensures reliable long-term sealing performance against the thermal oil medium at 120°C, with a high leakage class rating, effectively preventing internal leakage. SUS204 Body: The valve body is made of SUS204 stainless steel, providing good mechanical strength and moderate corrosion resistance, ensuring a long service life in industrial environments. Strong Compatibility and Stability Multi-Function Input Signal: The actuator supports both 4-20mA current and 0-10V voltage signal inputs, allowing flexible integration with most industrial automation control systems (e.g., DCS, PLC), simplifying installation. AC220V Standard Power Supply: Utilizes universal AC220V power, facilitating easy connection to site power sources and reducing installation and wiring complexity. High-Reliability Actuator: The built-in servo amplifier ensures rapid response, precise positioning, and includes overload protection. It operates stably with low maintenance requirements. Performance Results Since the GRAT Electric V-Port Control Ball Valve was put into operation in the heat exchanger system at this photovoltaic enterprise, system performance has significantly improved: Significantly Improved Control Accuracy: The outlet temperature fluctuation of the heat exchanger was strictly controlled within ±1°C of the set value, providing an extremely stable thermal environment for silicon wafer production, directly improving product yield. More Responsive System: The valve responds quickly to control signals, enabling timely adjustment of the opening based on system demands, effectively suppressing temperature overshoot or undershoot caused by load changes. Stable and Reliable Operation: Under continuous operating conditions, the valve has not experienced any issues such as sticking, internal leakage, or control failure, demonstrating its exceptional durability and stability, significantly reducing customer maintenance costs and downtime risk. Energy Efficiency Optimization: Precise temperature control avoids energy waste, helping the customer achieve energy savings and consumption reduction in the production process while improving product quality. The GRAT Electric V-Port Control Ball Valve is an ideal choice for industrial fluid control, especially in heat exchange applications with stringent requirements for regulation accuracy. Its outstanding control performance, reliable quality, and broad compatibility provide strong support for process automation and energy efficiency improvement across various industries, including photovoltaics, chemicals, and pharmaceuticals.

Application Background With the acceleration of urbanization, large commercial complexes and industrial facilities increasingly demand higher stability and energy efficiency from central air conditioning systems. A renowned air conditioning manufacturer, in its new generation of centrifugal chiller projects, required a key valve capable of precisely and reliably switching refrigerant flow directions to control the unit’s operating modes and energy regulation. The core customer requirement was that the valve must maintain zero leakage over the long term in a mixed medium containing refrigerant oil and withstand frequent start-stop cycles. The GRAT electric three-way ball valve series, with its specialized design for harsh working conditions, was successfully selected and applied in this chiller system. Operating Conditions Application: Central Air Conditioning Centrifugal Chiller Unit Industry: Eco-friendly Refrigeration Medium: Gas-Liquid Mixed Refrigerant (containing refrigerant oil) Product: GRAT Electric Three-Way Ball Valve (L-Port Flow Path) Size: DN125 Body: CF8 Ball: CF8 Seat Seal: PTFE + HNBR O-ring Composite Seal Temperature: -30 to +60 °C Pressure: PN1.6 MPa Control Signal: AC220V Switch Signal Commissioning Date: September 2010 Design Life: 5 to 8 years Product Advantages & Features Addressing the specific working conditions of centrifugal chiller refrigerant systems, the GRAT electric three-way ball valve demonstrates the following core advantages and characteristics: Exceptional Sealing Performance: Utilizes a composite valve seat of PTFE and HNBR. PTFE provides an extremely low friction coefficient and excellent chemical resistance, while the HNBR O-ring ensures elastic compensation capability across a wide temperature range (especially under low-temperature conditions). This dual protection achieves hermetic zero leakage against the refrigerant medium. Robust and Durable Structural Design: Both the valve body and ball are made of CF8 stainless steel, offering excellent structural strength and corrosion resistance. This enables the valve to withstand the system pressure of PN1.6 MPa and long-term erosion from the oil-containing medium, ensuring structural integrity under pressure fluctuations. Precise and Reliable L-Port Flow Path Switching: The three-way L-port flow path design is optimized for fluid diversion and mixing scenarios, perfectly matching the centrifugal chiller’s control logic for refrigerant flow direction. The electric actuator responds quickly with sufficient torque, ensuring the valve moves rapidly and accurately into position upon receiving the AC220V switch signal, achieving disturbance-free flow path switching. Broad Operational Adaptability: The valve design fully considers the low-temperature start-up environment of -30°C and operational temperatures up to 60°C. The selected materials maintain stable performance within this temperature range, avoiding the risk of seal failure due to low-temperature embrittlement or high-temperature aging, making it particularly suitable for full-range operation of refrigeration systems. Performance Results Since its commissioning in September 2010, this GRAT electric three-way ball valve has demonstrated performance exceeding expectations: Operational Reliability: Throughout its service life, the valve has not caused any system downtime or refrigerant leakage incidents attributable to the valve itself. It achieved a 100% actuation accuracy rate, ensuring the continuous and stable operation of the main unit. Service Life: The valve’s actual trouble-free operation time far exceeded the designed lifespan of 5-8 years, showcasing the foresight and high reliability of GRAT’s product material selection and structural design, delivering exceptional value and return on investment for the customer. Customer Feedback: The customer highly praised the “Set-and-Forget“ reliability of the GRAT valve, recognizing it as a key component ensuring the competitiveness of their high-end centrifugal chillers in the market. It has subsequently been designated as a specified component in multiple follow-up projects. GRAT electric three-way ball valve is a high-performance and reliable product in the field of eco-friendly refrigeration, particularly within central air conditioning centrifugal chillers where technical requirements and reliability standards are extremely high. GRAT remains committed to providing safe, efficient, and innovative solutions for global industrial fluid control.

Application Background Against the backdrop of the global shift toward pollution-free and renewable clean energy, wind power is playing a critical role as a key component in achieving national carbon neutrality goals by 2060. In agricultural irrigation scenarios in remote areas, onshore wind power systems require highly reliable control equipment to withstand harsh environments and ensure stable operation. GRAT control valves are specifically designed for such applications, providing precise fluid control solutions to enhance the energy efficiency and sustainable operation of agricultural irrigation systems. Operating Conditions Application Scenario: Wind power-driven agricultural irrigation systems Location: Agricultural areas in North China Medium: Irrigation water Size: DN65 Valve Body: SUS304 Connection: Flanged Control Signal: 4-20mA Power Supply: DC24V Nominal Pressure: 1.6MPa Medium Temperature: -10°C to +45°C Product Advantages and Features GRAT control valves offer the following core advantages for wind power-driven agricultural irrigation applications:High-Precision Regulation and Control: With a regulation accuracy of ±0.5%, the valves ensure stable and uniform distribution of irrigation water flow, supporting optimized agricultural water usage.Exceptional Environmental Adaptability: The valve body, made of SUS304 stainless steel, is corrosion-resistant and wear-resistant, enabling long-term stable operation in a wide temperature range of -10°C to +45°C and high-humidity environments. This makes it suitable for the variable climates of remote areas.Integrated Remote Monitoring Functionality: Optional 4G communication module supports real-time monitoring and remote control via mobile devices, facilitating unmanned management and rapid response in remote irrigation areas.Compatibility with Renewable Energy: The product can be adapted to hybrid wind-solar power supply systems, utilizing natural energy sources to enhance applicability in areas without grid coverage. Performance Results GRAT control valves have demonstrated outstanding performance in wind power-driven agricultural irrigation systems: Since their deployment in February 2024, the valves have operated continuously for over 18 months in remote areas of North China and southern coastal regions, maintaining a zero-failure record and significantly improving the reliability and productivity of irrigation systems. Customer feedback indicates that, compared to similar brands, GRAT control valves extend service life by approximately 20%, reducing replacement frequency and maintenance costs, thereby helping agricultural users achieve energy savings and cost reductions. High-precision control ensures the efficient use of water resources, supporting local agricultural sustainability while providing reliable technical support for clean energy applications. This not only validates the product’s reliability but also highlights GRAT’s deep commitment to the clean energy sector. As the global energy transition accelerates, we are extending our field-proven control valve technology to broader applications: from vast wind power bases in the northwest to clean energy demonstration zones in the southeastern coastal regions, and from large-scale agricultural irrigation projects to smart water management systems. GRAT will continue to innovate, dedicated to providing long-life, low-failure-rate control products for the wind power and other clean energy industries, injecting sustained momentum into global low-carbon development.

Background The new-generation energy-efficient magnetic levitation centrifugal air compressor, featuring contactless rotor operation via magnetic bearings to eliminate friction, is widely used in electronics, pharmaceuticals and other high-cleanliness industries. Precise air pressure regulation is key to its efficiency and stability, and the GRAT Electric Butterfly Valve—with rapid response and accurate flow control—serves as the ideal actuator for its pressure control system, ensuring stable operation under optimal conditions. Operating Conditions Industry: Compressed Air Systems Product: Application: Magnetically Suspended Centrifugal Air Compressor Medium: Clean Compressed Air Valve Material: CF8 Stainless Steel Seat Seal: Reinforced PTFE Temperature: -10°C to +80°C Nominal pressure: PN1.0-1.6 MPa Control Signal: Regulation 4-20mA / 0-10V Control Accuracy: ±0.5% Repeatability Accuracy: ±0.2% Product Advantages & Features The GRAT Electric Butterfly Valve is designed for the specific demands of magnetically suspended centrifugal compressors and offers the following core technical advantages: Precise Regulation Capability: Utilizes high-precision positioning technology, achieving control accuracy of ±0.5%, ensuring stable compressor discharge pressure within the set range. This Electric Butterfly Valve delivers reliable performance. Rapid Dynamic Response: Features an optimized valve structure combined with a high-performance actuator, achieving full-stroke response time of less than 4 seconds to promptly adapt to load fluctuations. Energy-Efficient Design: Incorporates a streamlined disc and low-flow-resistance passage design, with a flow resistance coefficient below 0.1 in the fully open state, effectively reducing system energy consumption. Smart Integration Features: Supports 4-20mA/0-10V standard signals for seamless integration with compressor control systems, enabling precise remote monitoring and regulation of the Electric Butterfly Valve. Application Benefits Significant Energy Efficiency Improvement: Through precise pressure control, this Electric Butterfly Valve helps maintain the compressor’s optimal operating conditions, achieving average energy savings of 8%-12%. Enhanced System Stability: The rapid response to load changes effectively suppresses pressure fluctuations, ensuring stable compressor operation. Reduced Maintenance Costs: Simplifies system structure and reduces auxiliary equipment, decreasing maintenance workload by approximately 50% compared to traditional solutions. Long Service Life: Rigorous testing confirms a service life exceeding 1 million cycles under continuous regulation conditions, demonstrating the proven reliability of this Electric Butterfly Valve. As magnetically suspended centrifugal compressors evolve towards higher efficiency and greater intelligence, GRAT will continue to optimize the control algorithms and material technology for the Electric Butterfly Valve. We remain committed to the “Simple & Reliable” technical philosophy, considering “Customer Value” as the fundamental starting point for technological innovation. We are dedicated to providing smarter, more efficient, and more reliable airflow control solutions, including advanced Electric Butterfly Valves, for the global compressor industry, supporting industrial energy conservation and smart manufacturing upgrades.

“When natural gas custom electric valves fail and require shutdown, and the original manufacturer is gone, finding a solution becomes critical. Three suppliers insisted pipe modifications were needed - meaning at least 5 days of downtime for cutting and welding. That translates to significant revenue loss and mandatory safety reporting. Who can handle that?” This real-world scenario from Zhang, an engineer at a natural gas processing plant, reflects a common challenge companies face with obsolete custom electric valves. GRAT’s specialized electric valves capability provides precise solutions for natural gas transportation needs, completely solving the “pipework changes required for valve replacement” problem. Customer Challenge Zhang’s facility handles regional natural gas transmission. A critical DN40 custom electric valve failed after years of service, requiring immediate shutdown according to safety protocols. The original manufacturer of this specialized custom electric valve had ceased operations, with all dimensional drawings and material specifications unavailable. Previous suppliers confirmed: “The flange spacing and bolt hole patterns are non-standard; conventional valves won’t fit. Pipeline modifications are unavoidable - at least 5 days downtime for alterations and testing.” For any natural gas operation, a 5-day shutdown triggers regulatory notifications and requires complete pipeline purging before restarting, creating substantial compliance burdens and operational risks. Zhang needed a solution that guaranteed: “No pipework changes, full compliance, and fast custom electric valves replacement.” GRAT Custom Electric Valves Solution Focused on the natural gas application requirements, GRAT’s engineering team completed comprehensive assessment - covering both dimensions and operating parameters - within 30 minutes: Mechanical Dimensions: DN40 bore, 280mm flange spacing (non-standard), 80° bolt hole orientation, RF flanged connection Operational Parameters: PN100 pressure class, SUS304 valve body material, hard-sealed construction, actuator with AC380V power, 4-20mA DC signal, 1/2NPT electrical connection “After delivery of our custom electric valves, zero pipework or electrical modifications were necessary. Gas transmission resumed immediately.” The installation team followed strict safety protocols: removing the obsolete valve (nitrogen purging + sealing surface preparation), installing the new custom electric valves (perfect bolt hole alignment + direct electrical integration), and system commissioning (comprehensive leak testing + signal verification). The entire custom electric valves replacement process required just 3 hours to restore full operation, successfully passing all regulatory inspections. Engineered for Natural Gas Safety & Efficiency Zhang’s situation demonstrates GRAT’s custom electric valves approach to natural gas applications. The fundamental principle is “complete dimensional and operational compatibility with safety and process requirements”: Material Integrity: Selecting compliant materials including SUS304, with full certification, preventing natural gas corrosion Sealing Performance: Custom-engineered hard-seat configurations, factory-validated at 1.5 times operating pressure Dimensional Accuracy: Advanced metrology ensuring 0.1mm precision, guaranteeing perfect existing pipeline integration Electrical Compatibility: Pre-configured for PLC/SCADA system integration, eliminating signal compatibility issues Why Custom Electric Valves Are Your Most Cost-Effective Solution GRAT custom electric valves enable industrial operators to implement compliant valve solutions with “zero infrastructure modifications and minimal operational risk.” If you’re confronting obsolete custom electric valves or incomplete technical specifications, and want to avoid costly pipework alterations, contact our specialists. Our “no demolition, no delay, guaranteed safety” approach to custom electric valves delivers tailored recommendations within 24 hours.

Background In food cold chain storage systems, pneumatic control valves serve as critical components for regulating refrigeration media. These environments typically feature high humidity, making them prone to pneumatic valve condensate formation when water vapor in compressed air systems condenses inside low-temperature valve bodies. This problem can lead to operational issues such as sluggish actuator movement and frozen sealing components. Operating Parameters: Application: Cold chain storage systems Product: Pneumatic flanged butterfly valve Medium: Compressed air / Liquid refrigerant Actuator Type: double-acting pneumatic Air Supply Pressure: 0.6–0.8 MPa Ambient Temperature: 2–8°C Relative Humidity: 75–85% RH Valve Material: SUS304 Connection: Flange Size: DN50 Power Supply: 24VDC Analysis Continuous formation of pneumatic valve condensate in actuator air supply lines and valve cavities has led to a series of failures. This accumulation causes frozen solenoid pilot valves, hardened piston seals, and icing on drive shafts. These condensate-related issues result in noticeable signal response delays, loss of sealing performance, significant reduction in actuation torque, and frequent unplanned shutdowns. Technical Principles  Technical analysis reveals that condensate formation stems from the dew point temperature of compressed air. When saturated moist air passes through actuators, instantaneous temperature drops occur at throttling points due to the Joule-Thomson effect, initiating condensate development. In low-temperature environments of 0–10°C, this phenomenon worsens due to:Air supply dew point temperature exceeding ambient temperature Poor pipeline layout hindering pneumatic valve condensate drainage Insulation deficiencies creating localized cold bridges Cyclic operation causing temperature fluctuations that promote condensate Solutions Air Supply Pipeline Optimization  Use double-sealed stainless steel piping systems with pressure drop monitoring to prevent pneumatic valve condensate formation. Ensure pressure loss remains ≤0.01 MPa per 10 meters. All connections should feature metal seal structures, with periodic leak detection to monitor potential pneumatic valve condensate issues. Graded Drainage System Design  Implement a three-stage drainage system specifically for pneumatic valve condensate removal at key points: after the air receiver, before the dryer, and before control valves. Utilize large-capacity float drains, adjustable timer drain valves, and high-efficiency centrifugal separators to effectively manage pneumatic valve condensate at multiple stages. Intelligent Temperature Control and Insulation System  Establish graded insulation to combat condensate in critical components. Use closed-cell rubber insulation with electric heat tracing for pipelines. Install custom insulation jackets with temperature sensors on valve bodies to maintain surface temperature above dew point and prevent pneumatic valve condensate. Fill actuators with aerogel material to provide comprehensive protection against condensate formation. Precise Environmental Humidity Control  Deploy rotary dehumidification units in valve cluster areas to maintain ambient dew point temperatures below -15°C, effectively preventing pneumatic valve condensate. Install humidity monitoring systems to activate dehumidification when RH ≥ 60%, controlling conditions that lead to pneumatic valve condensate. Results Systematic improvement in air quality, achieving ISO 8573-1:2010 Class 2 standards, ensuring dry air supply that prevents pneumatic valve condensate Drastic reduction in failure rates of core control valves, with an 80% year-on-year decrease in condensate-related failures Significant extension of actuator service life, with mean time between failures reaching 38,000 operating hours due to effective control Strategic reduction in annual maintenance costs by 67%, achieved through minimized condensate problems and reduced maintenance requirements Effective management of pneumatic valve condensate in low-temperature environments is essential for system reliability. Our professional services focus on comprehensive condensate solutions to ensure stability and durability of industrial control systems. We invite industry clients to collaborate on developing advanced prevention strategies for safer, more efficient fluid control solutions.

Contexte de l'application Dans les processus de traitement thermique de l'industrie métallurgique, les fours de recuit continu sont des équipements essentiels pour la production de bandes d'acier laminées à froid de haute qualité. Une grande aciérie du Hubei avait besoin d'un contrôle précis du débit dans la conduite d'air de combustion de sa ligne de recuit continu.Sous des ajustements à haute fréquence, les méthodes de contrôle traditionnelles souffraient de faible précision, réponse lente et défaillances fréquentes, tandis que le robinet papillon de ventilation électrique GRAT a développé une solution de régulation d'air fiable et de haute précision. Conditions de fonctionnement Cette application pose de sérieux défis aux performances des vannes, avec les paramètres de fonctionnement spécifiques suivants : Application : Conduite d'alimentation en air de combustion pour four de recuit continu Produit : Robinet papillon de ventilation électrique à faible charge GRAT Milieu : Air préchauffé Température : 120 °C – 300 °C (sous réserve de fluctuations fréquentes) Pression nominale : PN10 Taille : DN200 Raccordement : À bride Signal de commande : Commande modulante, 4-20mA Environnement d'exploitation : Réglage d'atelier industriel, nécessitant un équipement avec un indice de protection élevé et une capacité de fonctionnement continu. Durée de vie : ≥ 5 ans Avantages et caractéristiques du produit Le robinet papillon de ventilation électrique GRAT est conçu pour les environnements difficiles des fours de recuit : Contrôle proportionnel précis : Comporte un actionneur haute performance avec une précision de positionnement allant jusqu'à ±0,5 %. Maintient les fluctuations de l'atmosphère du four à moins de ±2 °C. Excellente résistance aux hautes températures : Construit en acier inoxydable SUS304, conservant plus de 85 % de sa résistance à 300 °C. Une conception de disque profilée réduit le couple requis de 40 %, économisant de l'énergie et réduisant l'usure. Haute fiabilité et longue durée de vie : Protection intégrée contre les surcharges empêche les dommages dus au blocage. Atteint un taux de fuite d'étanchéité inférieur à 0,01 % pour un cyclage à haute fréquence à long terme. Installation et maintenance faciles : Raccordement à bride standard pour une installation rapide. La conception modulaire garantit que le MTTR est inférieur à 30 minutes pour les composants clés. Résultats de performance Depuis sa mise en service en juillet 2017, la vanne a donné des résultats exceptionnels : Précision de contrôle améliorée : La fluctuation du volume d'air de combustion a été réduite de ±15 % à moins de ±6 %. La différence de température de la zone du four a été abaissée à moins de ±5 °C. Fiabilité prouvée : La vanne a fonctionné en continu sans défaillance pendant plus de 70 mois, accumulant plus de 250 000 cycles. Avantages économiques tangibles : Le taux de rendement du produit a augmenté de 92 % à 96,5 %, tout en réduisant simultanément le coût de fonctionnement par vanne. Durabilité exceptionnelle : Après avoir fonctionné 40 % au-delà de sa durée de vie prévue, la vanne reste en excellent état, offrant un retour sur investissement total de plus de 150 %. Le robinet papillon de ventilation électrique à faible charge GRAT démontre une adaptabilité et une fiabilité robustes dans les applications de contrôle de processus à haute température et à forte demande au sein de l'industrie métallurgique. Pour une solution de robinet papillon de ventilation électrique qui garantit efficacité et durabilité, GRAT est votre partenaire de confiance pour les nouveaux projets et les mises à niveau d'équipement.