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Wuhan Grat Control Valve Co., Ltd. nukiz@grat.com.cn 86-027-6070-6977

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Lastest company cases about Cryogenic Two-Phase Flow – GRAT Split-Body Electric Ball Valve for Industrial Refrigeration Systems
2025/10/22
Cryogenic Two-Phase Flow – GRAT Split-Body Electric Ball Valve for Industrial Refrigeration Systems
Background Industrial refrigeration is critical to food cold-chain, chemical processes, warehousing and logistics. Core requirements are fail-safe refrigerant control and high energy-efficiency. Plant operators need a valve that will positively isolate oil-laden, two-phase refrigerant, withstand sub-zero duty and remain maintenance-free for years. GRAT’s split-body electric ball valve was engineered for these exact conditions; its superior shut-off performance and material compatibility make it the preferred choice for Freon service, improving system tightness and reducing energy consumption. Operating Conditions Industry: Industrial refrigeration Industry: Industrial refrigerationProduct: GRAT 2-Pieces Ball ValveMedium: Freon (gas/liquid) with oil carry-overOperation: On/OffBody material: CF8Ball / stem material: CF8Seat seal: PTFE + HNBR O-ringTemperature range: –30 °C … +60 °CDesign pressure: PN 16 (1.6 MPa)Commissioned: May 2013Design life: 5–8 yearsControl signal: AC 220 V Product Advantages & Features The GRAT split-body electric ball valve incorporates several design features specifically for refrigeration duty: Cryogenic sealing integrity – PTFE primary seal combined with low-temperature HNBR O-rings maintains bubble-tight shut-off at –30 °C. Corrosion-resistant construction – CF8 stainless steel body and trim resist attack from Freon and refrigeration oil. High-compatibility actuator – accepts standard AC 220 V on/off signal, includes built-in surge suppression; >100,000 cycle life. Compact, pressure-rated body – PN 16 pressure class, low installation footprint, easy system integration. Low cost of ownership – modular cartridge design allows rapid seal replacement, minimising downtime. Performance Results Since commissioning in May 2013, GRAT valves have been operating in numerous industrial refrigeration plants: Service life exceeds specification – many valves have passed the 8-year design life; the longest uninterrupted run is 10 years with zero parts replacement. Zero external leakage – maintains tight shut-off under standard conditions, cutting refrigerant losses and improving system COP by 3–5%. Extended maintenance intervals – maintenance cycles are >2× longer than those of comparable butterfly or globe valves, reducing maintenance cost by ~40%. Strong customer acceptance – specified by major cold-chain logistics and chemical refrigeration projects in China; repeat-purchase rate >90%. For ten years GRAT split-body electric ball valves have supported China’s refrigeration sector. During this decade we have witnessed domestic industrial control equipment evolve from follower to leader, and we have participated in the transformation of the national cold-chain infrastructure. Reliability remains our primary design criterion and customer value the basis of every innovation. Guided by “Precise Control, Enduring Reliability”, we will continue to integrate IoT and fluid-control technologies to deliver smarter, more efficient and more sustainable solutions for the global refrigeration industry. >GRAT 2-Piece Electric Ball Valve
Lastest company cases about Smarter Control, Greater Savings - GRAT IoT Mini Ball Valve for Wastewater Treatment Facilities
2025/10/17
Smarter Control, Greater Savings - GRAT IoT Mini Ball Valve for Wastewater Treatment Facilities
Background In the complex operational system of wastewater treatment plants, precise and efficient fluid control is crucial to ensure water quality compliance and smooth processes. GRAT’s IoT mini electric actuator and UPVC ball valve offer exceptional performance, making them a reliable assistant in wastewater treatment. Operating Conitions Valve Body Material: UPVCMedium: Flocculant (PAC) / Sodium Acetate Solution (Carbon Source)Medium Temperature: NormalVoltage: AC 220VConnection: Internal ThreadOperation Mode: Proportional controlControl Signal: 4-20 mA with feedbackCommissioning Date: December 2023Expected Lifespan: 5 years GRAT IoT Mini Actuator This actuator is specifically designed for ball valves of DN25 and below, offering the following features: Powerful Drive and Energy Efficiency: Rated torque up to 20 NM, supports wide voltage input of AC220V/DC24V, with a rated power consumption of only 10W, combining energy savings with strong power. Precise Control and Excellent Performance: Utilizes PWM stepless speed regulation and encoder adjustment, enabling precise control within a range of 30%-100% with a control accuracy of up to 0.5%, ensuring fine-tuning of flow and pressure. Stable and Reliable Core Power: Equipped with a high-performance brushless motor, built-in overload protection, ensuring more stable operation, longer lifespan, and lower maintenance costs. Flexible Integration and Smart Communication: Supports Modbus communication protocol, allowing flexible integration into control systems for real-time remote command reception and valve status feedback. User-Friendly Interface and Emergency Handling: Features an OLED Chinese display for intuitive real-time monitoring of operational status and parameters; supports manual operation with a hex key, facilitating debugging and emergency handling. Rapid Adaptation to Complex Environments: Stroke time requires only 15s-25s, ensuring quick response and tolerance to humid environments, fully suited for the complex working conditions of wastewater treatment plants. GRAT UPVC Ball Valve In various stages of wastewater treatment, UPVC ball valves have become an ideal choice for ensuring stable and efficient operation due to their corrosion resistance, cost-effectiveness, and fluid control characteristics: Influent Stage: Rapidly responds to changes in water quality and quantity, precisely adjusts the opening degree, ensures stable influent flow, and effectively prevents corrosion of the valve body by corrosive media. Pretreatment Stage: Reasonably distributes flow to various units, adjusts flow velocity based on grid status, prevents clogging, ensures effectiveness, and significantly reduces maintenance costs. Biological Treatment Stage: Precisely controls aeration and chemical dosing flow based on IoT signals, optimizes dissolved oxygen and dosing amounts, and enhances treatment efficiency. Drainage Stage: With its sealing performance and smooth passage design, ensures stable discharge flow and pressure, integrates with monitoring equipment, and guarantees real-time compliance of drainage water quality. The GRAT IoT mini ball valve is not only a precise breakthrough in fluid control technology but also a significant response to the era of smart water management. In today’s pursuit of green, low-carbon, and sustainable development, GRAT IoT mini ball valve provides solid support for promoting water resource recycling and improving environmental governance, making it an ideal choice for the wastewater treatment sector to face future challenges.With its stable and reliable operational performance and highly automated control capabilities, GRAT deeply integrates into the entire process chain of wastewater treatment, continuously empowering plants to achieve refined and intelligent operations.
Lastest company cases about European High-Temp Nuclear Power Plant Retrofits: Custom GRAT Multi-Turn Rapid Nuclear Electric Actuators
2025/10/15
European High-Temp Nuclear Power Plant Retrofits: Custom GRAT Multi-Turn Rapid Nuclear Electric Actuators
In the global push for energy transition and safety, retrofitting aging nuclear power plants is a critical priority. For these upgrades, Nuclear Electric Actuators are essential, serving as the key drivers for critical shut-off valves. Retrofitting within confined original installation spaces to achieve higher temperature resistance, faster response, and more precise control is a significant challenge, particularly in the European market. The selection of high-performance Nuclear Electric Actuators is therefore paramount. A European nuclear power plant faced such difficulties, requiring retrofit Nuclear Electric Actuators for electric shut-off valves with specifications including 1-second quick opening, 150℃ high-temperature resistance, and full compatibility with the existing control system. Multiple local suppliers had struggled to meet the combined demand for a compact size and high performance in these specialized Nuclear Electric Actuators, causing significant project delays. Leveraging deep expertise in custom actuator design, the GRAT R&D team focused on developing superior Nuclear Electric Actuators, breaking down the technical challenges into four key areas for targeted development: 1. Delivering High Torque and Speed in a Compact Design for Nuclear Electric Actuators The client required the Nuclear Electric Actuator to open the valve within one second in a tight space while maintaining a torque output of at least 15N・m. The team re-engineered the gearbox and drivetrain specifically for these compact Nuclear Electric Actuators, removing non-essential parts. The final product was 30% smaller than conventional actuators of the same class, successfully achieving full 0–90° valve opening within one second, with torque consistently above 20N・m. This breakthrough demonstrates that both compact and high-performance Nuclear Electric Actuators can indeed coexist. 2. From Class B to H: Nuclear Electric Actuators Built for Extreme Temperatures This nuclear project required the electric actuators to pass two core temperature tests: 1500 open-close cycles at 60℃, and 10 hours of continuous operation at 150℃. The initial Class B temperature-rated motor showed insulation degradation at 120℃, unsuitable for reliable Nuclear Electric Actuators in high-temp environments. In response, the team upgraded to Class H high-temperature insulation materials (180°C capability) for all motor windings and electrical components within the Nuclear Electric Actuator. The final units passed both tests without any loss of control accuracy, setting a new standard for high-temperature Nuclear Electric Actuators. 3. Custom Multi-Turn Limit System in Nuclear Electric Actuators Eliminates Travel Error Risk The client’s proposed thermal management approach risked 45–60° of positioning error, which was unacceptable for nuclear “zero-deviation” standards. For these precision Nuclear Electric Actuators, the team dedicated two weeks to developing a customized limit system. Through multiple technical meetings, the travel error was controlled within only ±1 degree, ensuring the new Nuclear Electric Actuators delivered both structural compactness and exceptional control accuracy. 4. Dedicated Worm Gear Design Ensures Long-Term Life of Nuclear Electric Actuators Nuclear equipment demands long-term reliability from every component, especially the Nuclear Electric Actuators. The team developed a custom multi-turn worm gear set for these actuators using a special wear-resistant alloy and carburizing and quenching processes, paired with a high-temperature-stable lubricant. Testing showed a 60% reduction in wear rate at 150℃ compared to standard products, ensuring the long-term precision and reliability of the Nuclear Electric Actuators for over 100,000 operation cycles. The delivered custom Nuclear Electric Actuators were seamlessly integrated into the client’s constrained space and existing control system, meeting all the stringent nuclear standards. This project not only demonstrated GRAT’s capability to deliver advanced Nuclear Electric Actuators for complex challenges but also established a replicable technical blueprint for the nuclear power renovation projects worldwide. GRAT’s customized Nuclear Electric Actuators provide a proven and reliable solution for enhancing the safety and efficiency of nuclear power equipment globally. > GRAT Explosion Proof Electric Actuator  
Lastest company cases about Cross-Border Nuclear-Grade Actuator Retrofit: GRAT’s Customized Solutions Support European Projects
2025/10/10
Cross-Border Nuclear-Grade Actuator Retrofit: GRAT’s Customized Solutions Support European Projects
As nuclear facilities worldwide undergo modernization, the need for electric actuators that satisfy stricter safety norms, extreme environments, and space-limited retrofits has intensified. These components are critical for valve operation—and must deliver precision, reliability, and compliance under high temperatures and constrained layouts. A European nuclear operator approached GRAT with a complex challenge: their valve actuator retrofit required multi-turn control, 1-second opening, and 150°C resistance—all within a severely limited installation footprint. After local suppliers failed to meet these integrated demands, the client turned to GRAT based on our documented expertise in compact and high-performance actuation. Challenge: Complex Requirements in Confined Conditions During the initial video conference, the client outlined key requirements: the actuator must fit threaded shut-off valves, comply with European EN nuclear standards, open within one second, and operate continuously for 10 hours at 150°C (including five full open-close cycles). The client also expressed concerns about project feasibility, noting that several local suppliers had declined due to complexity or power compatibility issues. Approach: Structured Development and Transparent Collaboration GRAT promptly formed a dedicated customization team, breaking down the requirements into four core modules: size, speed, temperature resistance, and precision, with weekly synchronization meetings established from the start. Early in the process, the client proposed an approach where only the gearbox would be housed internally to improve heat dissipation. However, GRAT’s analysis showed this would introduce rotational error of 45–60 degrees, rendering it unsuitable for zero-deviation nuclear valve control. The team therefore proposed an alternative path. Execution: Data-Driven Testing and Iterative Optimization To meet high standards within a limited timeframe, GRAT engineers defined a clear development roadmap centered on optimized motor configuration and a customized limit system, tailored specifically to threaded valve installation. The team built a simulated high-temperature nuclear environment for validation, sharing real-time video and data with the client throughout testing. Initial test failure due to lubricant breakdown was resolved with high-temperature specialty grease; Motor windings and electronics were upgraded from Class B to Class H insulation, supplemented with custom temperature sensors—keeping the motor within safe operating limits at 150°C; Gearbox parameters were iteratively optimized to achieve both 1-second operation and 15N·m torque. The actuator underwent 1,500 cycles at 60°C and a 10-hour thermal test at 150°C (including five cycles), consistently demonstrating reliability and response under extreme conditions. All results were shared promptly with the client via detailed test reports, ensuring full transparency. The client also expressed strong interest in GRAT’s in-house developed testing equipment. Outcome: Validated Performance and Ongoing Partnership Upon sample delivery, the client conducted multiple rounds of high-temperature and rapid-operation tests—all of which were passed successfully. The actuator integrated seamlessly into the existing control system, earning praise for its compact design, responsiveness, and thermal durability. The client subsequently placed repeat orders, indicating intent for long-term collaboration. Conclusion This case demonstrates GRAT’s ability to deliver customized nuclear-grade solutions and reinforces its customer-centric approach. It also provides a reference technical pathway for retrofits of aging nuclear units worldwide. This success further indicates that customized, multi-functional electric actuators will play an increasingly vital role in the intelligent modernization of nuclear, petrochemical, and other high-temperature high-pressure industries. GRAT remains committed to supporting global clients with localized responsiveness, helping overcome challenging operational constraints with safe and efficient automation solutions. > GRAT Quick Open Motorized Actuator
Lastest company cases about Stable Draft Control - GRAT Guide Vane Motor for Burner Dampers
2025/09/26
Stable Draft Control - GRAT Guide Vane Motor for Burner Dampers
Application Background In industrial combustion systems, the accuracy and stability of air volume control directly impact combustion efficiency, energy consumption, and operational safety. The customer required a highly reliable air volume regulation system for an 800mm burner damper to meet long-term continuous operation, rapid response, and low maintenance demands. GRAT provided a dedicated guide vane motor control solution, which was put into operation in May 2012 and has been functioning stably since. Operating Conditions Size: DN800Power Supply: AC220VControl Signal: On/OffFeedback Signal: 0–1 kΩ ResistanceDesign Life: 8 years (failure-free)Commissioning Date: May 2012Function: Airflow Regulation Product Advantages & Features High-Precision Control: Closed-loop feedback control technology enables real-time damper position calibration with an air volume regulation accuracy error of < ±2%. It supports 0-1kΩ analog signal feedback and is compatible with mainstream PLC/DCS control systems for seamless integration. Durability and Reliability: Core components are built with metal gears and high-temperature-resistant insulating materials, ensuring stable performance under long-term, high-intensity operation. The fully sealed structure effectively prevents the ingress of dust and moisture, making the guide vane motor suitable for harsh industrial environments. Low Maintenance Requirements: The brushless motor design eliminates carbon dust accumulation, extending the service life of the guide vane motor. The modular structure allows for quick component replacement, significantly reducing downtime and maintenance needs. Safety and Compatibility: The equipment includes overload and overheating protection functions to prevent damage. It supports universal AC220V power input and is compatible with most global industrial power standards, ensuring safe and reliable operation. Performance Results Stable Operation Record: The guide vane motor achieved failure-free operation for over 10 years since May 2012, fully meeting design life requirements. Energy Efficiency Improvement: Precise air volume control optimizes combustion air ratio, improving combustion efficiency by approximately 8%. Reduced Maintenance Costs: No major failures occurred during the period, with maintenance costs only 30% of the industry average. Customer Feedback: The guide vane motor system responds quickly and controls accurately, significantly reducing the frequency of manual intervention, making it suitable for automation upgrade projects. GRAT guide vane motors are the preferred choice for air volume control in industrial combustion systems due to their adaptability, reliability, and cost-effectiveness. We provide global customers with high-performance, long-life control products to support intelligent and efficient operations. Through continuous innovation, we help industries such as petrochemicals, steel metallurgy, and power station boilers achieve smart upgrades and energy savings, creating sustainable value. For more details, contact our technical team for full support and collaboration in building efficient, reliable control systems.
Lastest company cases about Collaboration for Sanitary Control - GRAT SS316L Electric Ball Valve for Secondary Water Supply Systems
2025/09/24
Collaboration for Sanitary Control - GRAT SS316L Electric Ball Valve for Secondary Water Supply Systems
Application Background Secondary water supply systems in high-rise buildings represent critical infrastructure in modern urban construction, where their stability and reliability directly impact residents’ water safety and quality of life. In this context, performance requirements for core system components—particularly valve products—have become increasingly stringent. GRAT’s SS316L sanitary clamp-type electric ball valve, developed for the high-end secondary water supply market, is specifically designed for high-standard water supply environments. It has established an integrated intelligent pump-valve solution through mature collaboration with German WILO Wilo pump equipment. Operating Conditions Medium: Potable water; clean domestic water; occasionally exposed to low-concentration chloride disinfectants Working Pressure: 0.6-1.6 MPa Temperature: -10°C to 120°C Connection: Sanitary clamp-type Control Signal: 24V DC/220V AC; supports 4~20mA analog or pulse control Installation Locations: Pump outlet, zoned water supply pipelines, water tank inlet/outlet Operating Frequency: ≥50 open-close cycles daily Product Advantages & Features Extended Service Life Design: Utilizes precision molding technology and high-accuracy motor drive systems, ensuring over 200,000 open-close cycles with maintenance-free operation for more than 10 years. Sanitary Material Certification: Valve body constructed from SS316L ultra-low carbon stainless steel with mirror polishing, FDA compliant, fully meeting potable water hygiene standards. Intelligent Control Technology: Built-in overload protection and temperature sensing Enables start-stop synchronization and flow matching control with WILO pumps Real-time feedback of valve position status to pump control systems Proprietary Sealing Technology: Employing PTFE-enhanced composite sealing materials with zero-leakage design, significantly exceeding API 6D standard requirements. Rapid Clamp Connection: Features interface standards compatible with WILO pumps, enabling tool-free assembly/disassembly, compliant with 3A/SMS/DIN standards. Performance Results In practical applications, the water supply system comprising GRAT electric ball valves and Wilo pumps demonstrates exceptional performance: Enhanced Reliability: 85% reduction in failure rate compared to conventional valves, with 30% improvement in pump-valve collaborative efficiency Energy Consumption Optimization: Flow resistance coefficient below 0.02, achieving 12-15% energy savings compared to standard valves Water Quality Assurance: Third-party testing confirms zero contamination after prolonged use Integration Efficiency: 100% compatibility with mainstream pump equipment including WILO, reducing commissioning time by 60% Lifecycle Cost Reduction: 40% decrease in comprehensive operational costs with a payback period of less than 18 months With accelerating urbanization and increasing building heights, traditional water supply methods can no longer meet the pressure and quality requirements at the endpoints of high-rise buildings, making secondary water supply systems essential solutions. The GRAT electric ball valve series has been successfully implemented in numerous international high-end water supply projects, including super high-rise building complexes in the Middle East, pipeline systems for European star-rated hotels, and water supply systems for medical facilities in the Asia-Pacific region. These applications establish new reliability benchmarks for the global secondary water supply industry and provide technologically advanced valve solutions for water supply equipment enterprises worldwide.
Lastest company cases about Key Player in Mining-GRAT Electric Slurry Control Valves in Mineral Processing
2025/09/19
Key Player in Mining-GRAT Electric Slurry Control Valves in Mineral Processing
In mining production, electric control valves for slurry play a critical role as key fluid control devices. The primary function of these valves is to regulate the flow and pressure of slurry, ensuring the stability and continuity of mining operations. This document outlines the working principles, characteristics, and applications of electric slurry control valves in mining production. 1. Working Principle of Electric Slurry Control Valves Electric slurry control valves consist of an electric actuator and a valve body. The electric actuator receives signals from the control system and drives the valve body to perform opening, closing, or regulating operations. When the valve opens, slurry flows through, and the flow rate and pressure are adjusted accordingly. By modulating the valve opening, precise control over slurry flow and pressure can be achieved. 2. Features of Electric Slurry Control Valves High Efficiency: These valves employ advanced electric drive technology, enabling rapid response and precise control to adapt quickly to changes in the production process. Reliability: Electric slurry control valves offer high reliability and stability, capable of operating consistently in harsh mining environments while minimizing failure rates. Intelligent Operation: Modern electric slurry control valves are typically equipped with smart sensors and control systems, enabling remote monitoring and automated control to enhance production efficiency. Safety: The design of these valves prioritizes safety, incorporating features such as explosion-proof and corrosion-resistant capabilities to ensure secure operation. Wear Resistance: The fixed-ball hemispherical structure provides excellent wear resistance. Additionally, the V port design on the valve core generates a shearing force when rotating against the hard seal, cutting fibers and preventing jamming. 3. Applications of Electric Slurry Control Valves in Mining Production Mineral Processing Control: In mineral processing, precise regulation of slurry flow and pressure is essential. Electric slurry control valves enable real-time monitoring and adjustment of flow rates, ensuring stability and efficiency in the beneficiation process. Tailings Management: Tailings treatment is a critical aspect of mining production. These valves can be used to control the flow and pressure of tailings discharge, ensuring efficient and safe management. Mine Drainage: Mine drainage is vital for maintaining mining operations. Electric slurry control valves allow precise control of flow and pressure in drainage pipelines, ensuring the proper functioning of the drainage system. Heap Leaching Operations: Heap leaching is a method for metal extraction. Controlling slurry flow and pressure during this process is crucial. Electric slurry control valves provide accurate regulation, improving metal recovery rates. 4. Conclusion In summary, electric control valves for slurry are indispensable in mining production due to their efficiency, reliability, intelligence, and safety. As technology continues to advance and mining production evolves, the application prospects for electric slurry control valves are expected to expand further. > GRAT Electric Slurry Control Valves
Lastest company cases about Ready-to-Use Corrosion Protection - GRAT UPVC Electric Ball Valve
2025/09/17
Ready-to-Use Corrosion Protection - GRAT UPVC Electric Ball Valve
In the modern industrial sector, valves serve as critical equipment for fluid control, and their performance and reliability are of great significance in ensuring the stable operation of systems. The UPVC electric ball valve has garnered widespread attention due to its excellent corrosion resistance and broad application scenarios. Corrosion Resistance and Material Characteristics The UPVC electric ball valve is constructed from high-quality UPVC (unplasticized polyvinyl chloride) resin, which offers exceptional corrosion resistance and can withstand erosion from various chemical media. Whether in acidic, alkaline, or saline environments,it maintains stable performance, effectively extending its service life. Additionally, UPVC material possesses excellent mechanical properties and processability, making the valve easier to machine and install during manufacturing. Temperature Adaptability The UPVC electric ball valve is designed with full consideration of temperature factors. It can operate normally within a temperature range of -40°C to +80°C, demonstrating strong adaptability to meet fluid control requirements in various harsh environments. Furthermore, UPVC material maintains stable performance even at high temperatures, preventing valve failure due to temperature fluctuations. Connection Methods The UPVC electric ball valve employs multiple connection methods to accommodate different pipeline system requirements. Common connection methods include threaded union connections and flange connections. These connection methods are not only easy to install but also provide excellent sealing performance, effectively preventing media leakage. Additionally, the UPVC electric ball valve features quick installation and disassembly, facilitating maintenance and replacement. Application Scenarios Thanks to its corrosion resistance, temperature tolerance, and ease of installation, the UPVC electric ball valve is widely used in numerous fields. In industries such as chemical, petroleum, pharmaceutical, and food processing, it can be used to control the flow of corrosive media, high-temperature media, and high-viscosity media. Moreover, the UPVC electric ball valve plays an important role in municipal construction, water treatment, and environmental protection projects, providing reliable support for fluid transportation. Conclusion In summary, the UPVC electric ball valve, with its outstanding corrosion resistance, excellent material characteristics, broad temperature adaptability, and flexible connection methods, has become an ideal choice for fluid control in modern industrial applications. In practical use, its superior performance and reliability provide robust support for fluid control in various scenarios. With continuous technological advancements and process improvements, the UPVC electric ball valve will continue to play a vital role in the field of fluid control in the future.
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Lastest company news about Meet GRAT at 2025 Chengdu International Petrochemical Expo
Meet GRAT at 2025 Chengdu International Petrochemical Expo
Meet GRAT at 2025 Chengdu International Petrochemical Expo From September 11 to 13, 2025 (Thursday to Saturday), the highly anticipated China Petrochemical Exhibition will grandly open at the Chengdu Century City New International Convention and Exhibition Center. This event serves as a key communication platform for the petroleum and chemical industry, bringing together numerous industry elites and high-quality enterprises to discuss new trends and developments. GRAT Control Valve will showcase a variety of specialized valves for the petrochemical sector at Booth B322. We sincerely invite industry colleagues to visit our booth for in-depth exchanges and collaborative business opportunities. Featured Showcase: GRAT Core Products [New!]Explosion-Proof Actuator Series: Certified with Ex d IIC T6 explosion-proof rating, this series is designed to perform reliably in complex flammable and explosive environments typical of the petrochemical industry. It ensures stable operation even in harsh conditions such as refineries and oil and gas fields, providing critical safety support for production operations. Explosion-Proof Plug Valve (42-105 MPa): Featuring a zero-leakage design and manufactured in compliance with API Spec 6A standards, this valve offers excellent adaptability to challenging media including sour crude oil and natural gas. It guarantees both safety and stability throughout the transportation process. Industry Partnership: Building a Safer Ecosystem As a trusted technical partner in the petroleum and chemical industry, GRAT has always adhered to the core philosophy of “Safety as the Foundation, Practicality as the Priority.” At the upcoming Chengdu Petrochemical Exhibition, we look forward to deepening connections with global clients and partners to jointly advance technological innovation and standardization in petroleum equipment designed for demanding environments—including flammable, high-pressure, and corrosive conditions. This participation not only highlights our premium products, such as explosion-proof actuators and explosion-proof plug valves, but also reflects our long-term commitment to “safeguarding energy security through expertise.” We strive to ensure that every valve serves as a safety cornerstone within production lines, contributing to more reliable and efficient operations across the global energy industry. We warmly invite you to visit the GRAT boothand join us in building a safer future for the petrochemical sector. Dates: September 11–13, 2025 (Booth: B322)Venue: Chengdu Century City New International Convention & Exhibition Center
Lastest company news about Innovation in Action, Excellence in Execution | Grat's Highlights at 2025 Shanghai Refrigeration Expo
Innovation in Action, Excellence in Execution | Grat's Highlights at 2025 Shanghai Refrigeration Expo
Innovation in Action, Excellence in Execution | Grat's Highlights at 2025 Shanghai Refrigeration Expo From April 27-29, 2025, Grat Control Valve Co., Ltd. showcased its cutting-edge solutions at the 36th China International Refrigeration Exhibition in Shanghai - the industry's premier event for HVAC&R innovation. Aligning with this year's theme of "High Efficiency, Energy Conservation, and Intelligent Transformation", which featured 1,500+ global exhibitors across 250,000+ sqm, showcasing HVAC-R technologies, heat pumps, and cold chain solutions, while attracting 80,000+ professional visitors, including 50% international attendees.    1.Product Highlights: Engineered to Solve Industry Challenges Grat's exhibition lineup delivers practical innovations addressing critical HVAC&R industry pain points: ①Precision-engineered Electric Modulating Ball Valve ✓ Leak-proof performance - Enhanced sealing materials and structure ensure reliable operation in low-temperature refrigeration systems✓ Universal compatibility - Multi-protocol communication interfaces enable seamless integration with major control systems ② High-performance Electric Modulating Butterfly Valve ✓ Corrosion-resistant construction - Specialized valve disc and reinforced bearings withstand high-humidity/salt-spray environments✓ Modular maintenance - Field-replaceable components reduce downtime by up to 60% ③ Compact Mini Electric Actuator ✓ Compact retrofit solution - 40% smaller footprint than conventional actuators for legacy system upgrades✓ Fail-safe operation - Integrated manual override ensures continuous functionality during power outages   2.Industry-Specific Value: Scenario-Based Engineering Grat's products are purpose-built for real-world operational demands across critical sectors: Cold Chain Logistics • Wide-temperature ball valves  ensure reliability in:Cold storage facilities,refrigerated transport systems,pharmaceutical logistics. Commercial HVAC • Plug-and-play micro actuators enable:Energy-efficient retrofits for hotels/hospitals.   3. Technical Exchange: Solving Ground-Level Challenges During the exhibition, the GRAT technical team engaged in in-depth discussions with clients on key technical topics, including: Anti-condensation design solutions for valves in cryogenic applications; Compatibility optimization between actuators and building automation systems; Humidity resistance strategies to enhance valve longevity in high-moisture environments.   With professional dedication, we grow alongside the industry. At this exhibition, GRAT showcased its expertise through product displays and technical exchanges, gaining deeper insights into the industry's core demands for valve reliability and system compatibility. Moving forward, we will continue to refine product performance, strengthen collaboration with clients and design institutes, and deliver tailored control solutions that meet the evolving needs of the refrigeration sector. Looking forward next meet Exhibition!
Lastest company news about Pneumatic Valve Working Mechanism: Key Components, Air Pressure Role & Fail-Safe Designs for Industrial Use- Core Rules
Pneumatic Valve Working Mechanism: Key Components, Air Pressure Role & Fail-Safe Designs for Industrial Use- Core Rules
Pneumatic Valve Working Mechanism: Key Components, Air Pressure Role & Fail-Safe Designs for Industrial Use- Core Rules 1 Core PrinciplePneumatic valves control fluid flow (air, gas, or liquids) using compressed air to actuate internal pistons or diaphragms. Unlike electric valves, they're explosion-proof, making them ideal for hazardous environments like chemical plants or oil refineries. Key Advantage: No electrical sparks ,safer for volatile settings.   2 Key Components Actuator: Converts air pressure into linear/rotary motion. Valve Body: Contains ports and seals to direct flow. Solenoid (for automated valves): Electrically controls air supply to the actuator. Why It’s Reliable: Fewer moving parts ,lower failure rates vs. hydraulic systems.   3 Compressed Air's Role Air pressure (typically 20–120 psi) acts on the actuator’s piston/diaphragm. When pressure overcomes spring resistance, the valve shifts. Releasing pressure lets the spring return it to default. Critical Factor: Air must be clean/dry to prevent corrosion or clogging. 4 Fail-Safe Mechanisms Many pneumatic valves are "spring-return" – they auto-close if air supply fails (crucial for safety in power plants or chemical systems). Alternative: Double-acting actuators (air moves valve both ways) for higher speed/force.   5 Speed & PrecisionResponse time is rapid (milliseconds), but flow control isn’t as precise as electric valves. For accuracy, proportional pneumatic valves modulate air pressure to adjust flow gradually. Trade-off: Simplicity over precision; best for ON/OFF or coarse control.   6 Real-World Application Example: In bottling plants, pneumatic valves control air bursts to clean bottles. Their durability and fast cycling outperform electric alternatives. Takeaway: Pneumatic valves excel where speed, safety, and simplicity matter.  > GRAT Pneumatic Ball Valve
Lastest company news about Refrigeration Advances: Unveiling GRAT's High-Performance Refrigeration Solutions
Refrigeration Advances: Unveiling GRAT's High-Performance Refrigeration Solutions
With the national strategy for "carbon peak and carbon neutrality" taking effect, the era of "carbon neutrality" has officially begun. The refrigeration industry has become a key focus for advancing the dual goals of carbon reduction. Increasing research into energy-saving technologies, enhancing energy efficiency, and achieving green development offer significant opportunities for growth within the refrigeration industry. GRAT provides technical support and solutions to the refrigeration industry, with products known for precise regulation, zero leakage, and low fault rates. Our control and regulating valves have demonstrated long-term stability in refrigeration units, earning unanimous praise from customers. GRAT continues to innovate, offering higher quality products and services to the refrigeration industry. Industry Case: Application: Industrial Refrigeration Medium: Freon Control Mode: Two-way Shut-off Valve Body Material: SCPH2 Valve Core Material: SUS304 Nominal Bore: DN80, DN100 Medium Temperature: -30℃ to +60℃ Working Pressure: PN1.6Mpa Design Life: 5 to 8 years Control Signal: AC220V Switching Quantity Application Conditions: Air-liquid mixture of Freon containing refrigeration oil For more information on how GRAT's innovative solutions are advancing the refrigeration industry towards carbon neutrality, please explore our website and follow our latest updates. > GRAT Electric Intelligent electric actuator
Lastest company news about Enhancing Sustainable Development: GRAT's Electric Three-Way Ball Valves in Philippine Water Treatment
Enhancing Sustainable Development: GRAT's Electric Three-Way Ball Valves in Philippine Water Treatment
Sustainable development is a concept that seeks to meet the needs of the present without compromising the ability of future generations to meet their own needs. It calls for a balance where humanity must, while extracting from and creating a prosperous life in nature, not sacrifice its own living environment. With the rapid development of industrialization, industrial waste has become a significant obstacle to sustainable development. Our client in the Philippines, a specialized water treatment company, is dedicated to understanding industry needs and valve directions. They are committed to providing professional services and assistance, optimizing the manufacturing and operational processes of their products.   As a technology-based company, relying on an in-depth industry background and long-term practical experience, they provide a rapid response to customer needs, offering efficient solutions for environmental issues such as wastewater, exhaust gases, and chemical waste. Based on the actual working conditions at the customer's site and leveraging our rich experience in the environmental protection and water treatment industry, we have provided the following product information: Electric Three-Way Ball Valve Specifications: Voltage: AC220V Bore Size: DN50 Temperature: ≤120°C Pressure: ≤16 bar (Replace with the correct unit if the original text specifies a different unit) Valve Body Material: SS304 Connection Type: Threaded Protection Level: IP67 Three-Way Ball Valve Type: L-Type   > GRAT Electric Three-Way Ball Valve
Lastest company news about How to Address Valve Erosion and Corrosion
How to Address Valve Erosion and Corrosion
Erosion and corrosion are phenomena where the internal metal surface of a valve pipeline is damaged due to high-speed relative motion between the metal and fluid. This interaction results from the combined effects of erosion and corrosion, leading to significant local corrosion. This issue is prevalent in the elbows of valves and pipelines in the oil, chemical, energy, and power industries, especially in high-pressure, high-temperature fluid transportation pipelines with solid particle flow, liquid-solid mixed flow, and liquid-gas-solid three-phase flow. Consequently, erosion and corrosion problems have garnered significant attention.   When valves in pipelines are affected by erosion and cavitation, it can cause local thinning of the pipe wall and internal corrosion of the flow channel. Excessive pressure may lead to leaks or ruptures. Typically, corrosion areas can be detected by ultrasound, but edges or overheated pipelines cannot be detected using this method. Therefore, erosion and cavitation remain particularly challenging issues in industrial production. I. Analysis of Erosion Causes Flash evaporation of fluid medium causes erosion to the valve. Hard impurities in the fluid medium cause severe erosion and wear to the valve components. Valve opening between 30%-40%, resulting in a small flow area and accelerated fluid velocity, leading to high-pressure erosion of the valve components. The fluid medium's flow trajectory at 30% valve opening (see Figure 1) shows direct impact on the valve body outlet inner wall and flange edge, causing erosion. Conventional imported valves are also unsuitable for erosion conditions (see Figure 2). Figure 1: Original valve medium flow trajectory Figure 2: Damage to imported brand valves Figure 3: Damage to domestic brand valves in metallurgy and chemical industries Slurry (contains 5% seawater)   II. Solutions   To address the erosion problem of the on-site valve body, our company uses a sealing seat with an open baffle design and special wear-resistant metal materials plus aerospace wear-resistant treatment (see Figure 3). This structure slightly reduces the diameter of the valve seat, increasing valve opening and allowing hard media such as slurry to flow through the valve chamber, significantly reducing erosion and wear on the valve body walls. The baffle structure of the sealing seat provides a first layer of protection, ensuring that even if the baffle is worn, the sealing effect of the valve is not compromised. The valve core and the sealing surface of the valve seat, along with the inner wall, are treated with wear-resistant coatings (e.g., hard chrome plating, WC spraying, or aerospace hard alloy overlay welding), extending the service life of valve components and overall valve durability.   Figure 3: Sealing Seat with V-shaped Open Baffle                     Figure 4: Conventional Valve Sealing Seat         III. Ordering Instructions This solution is suitable for erosion conditions, with a specially designed baffle structure on the valve seat to effectively prevent fluid medium erosion. To improve effectiveness, it is recommended to provide specific technical parameters from the site (e.g., medium, medium pH value, valve opening, flow rate, pressure difference, closing pressure, medium temperature) to select the most appropriate sealing materials and special component treatments. Valve materials available include 304, 304L, 316, 2205, SMO, etc., for reference.   Figure 5: GRAT Control Valve Erosion-resistant Wafer Ball Valve (available with flanged connection)
Wuhan Grat Control Valve Co., Ltd.
Wuhan Grat Control Valve Co., Ltd.
Wuhan Grat Control Valve Co., Ltd.
Wuhan Grat Control Valve Co., Ltd.
Wuhan Grat Control Valve Co., Ltd.
Wuhan Grat Control Valve Co., Ltd.
Wuhan Grat Control Valve Co., Ltd.
Wuhan Grat Control Valve Co., Ltd.
Wuhan Grat Control Valve Co., Ltd.
Wuhan Grat Control Valve Co., Ltd.
Wuhan Grat Control Valve Co., Ltd.
Wuhan Grat Control Valve Co., Ltd.