Wuhan Grat Control Valve Co., Ltd.

In the industrial refrigeration sector, equipment stability and energy efficiency control remain top priorities for users. Faced with the challenges of precise water medium regulation and ultra-low temperature conditions, operators demand highly reliable and maintenance-free fluid control solutions. The GRAT electric water supply regulating valve, with its precision down to 1L/min and zero-leakage sealing, has become the preferred choice for numerous industrial refrigeration users, effectively enhancing system stability and significantly reducing operational costs. Operating Conditions Port Size: DN15 - DN50 Industry Application: Industrial Refrigeration Medium: Water Control Action: On/Off Shut-off or Proportional Control Body Material: CF8 (ASTM A351) Trim Material: CF8 (ASTM A351) Seat Seal: PTFE + HNBR O-ring Medium Temperature Range: -30°C to +60°C Nominal Pressure (PN): 1.0 - 6.4 MPa Performance Results Based on the aforementioned working conditions, the GRAT electric water supply regulating valves have become the preferred choice for numerous industrial refrigeration users due to their high-precision regulation and excellent sealing performance. After applying the GRAT electric water supply valve to a central air-conditioning chilled water unit, the customer provided the following operational data: High-Precision Regulation and Zero Leakage Enables micro-regulation as low as 1L/min, supported by a CF8 stainless steel valve body and PTFE+HNBR composite sealing. Zero medium leakage throughout service ensures safety and environmental compliance. Enhanced System Stability and Reliability Temperature control deviation reduced by 65%, while the average annual failure rate decreased from 3.2 to below 0.5. Original factory precision is maintained even after 5 years of continuous operation. Reduced Maintenance and Operational Costs Achieved an annual reduction in maintenance expenses of approximately ¥45,000, alongside an 82% decrease in unplanned downtime due to valve-related issues, significantly improving cost-effectiveness and production availability. Improved Energy Efficiency Cooling efficiency increased by 6.8%, contributing to lower energy consumption and enhanced operational sustainability. Other Application The GRAT electric water supply regulating valve automatically adjusts flow rates and primarily consists of an electric actuator and a valve body. It offers broad applicability, high precision, and rapid response, making it ideal for scenarios requiring fast adjustments. In HVAC applications, the valve is widely used in heating and cooling systems. It modulates cold or hot water flow by automatically adjusting the opening based on real-time room temperature feedback, ensuring a consistent and comfortable indoor climate. In boiler systems, the valve serves as a critical component in automatic feedwater regulation. Its precisely designed throttle element adapts to varying pressure differentials, maintaining stable drum water levels while preventing media backflow and leakage, thereby enhancing system safety and cleanliness. In summary, the GRAT electric water supply regulating valve has extensive applications in HVAC, refrigeration, boilers/industrial furnaces, primarily used for flow control, temperature regulation, and medium flow control, thus enhancing system stability and efficiency. We remain committed to continuous technological innovation and lean manufacturing to provide smarter and more reliable fluid control solutions for industrial customers worldwide, aiding in the long-term goal of achieving efficient energy savings and stable operation of systems. > GRAT Electric Water Supply Regulating Valve

In the fields of industrial production and water treatment, the precise operation of dosing devices is directly related to process stability and cost control. The IoT mini electric actuator equipped with plastic ball valves, launched by GRAT, has become an ideal control component for dosing devices due to its compact size, outstanding performance, and adaptability, providing efficient and reliable solutions for various dosing scenarios. Core Product: Technical Breakthrough of the IoT Mini Electric Actuator The GRAT IoT mini electric actuator is an innovative product specifically developed for small fluid control scenarios, and its technical advantages can be clearly presented in the following four aspects: Structural Design: Extreme Miniaturization, Suitable for Confined Spaces The actuator’s volume is only 1/3 of that of traditional actuators, weighing less than 500 grams, with a compact integrated structure design. This lightweight and small size characteristic allows it to easily fit into narrow spaces inside dosing devices, making it especially suitable for the layout of miniaturized and integrated dosing equipment. Performance: High Precision, Strong Protection, Stable Response to Complex Environments Control Precision: Equipped with high-performance brushless motors, the control precision can reach 0.5%, allowing for precise adjustment of the ball valve opening and closing angles, thus achieving fine control of the chemical flow, meeting the stringent dosage requirements during dosing processes. It can also maintain long-term stable operation in common humid, dusty, or slightly corrosive environments in dosing devices. Material Selection: Corrosion and Abrasion Resistant, Ensuring Fluid Purity The accompanying plastic ball valves are made from high-strength PP or PVDF materials, both of which possess excellent chemical corrosion resistance and can withstand long-term erosion from various commonly used chemicals such as acids, alkalis, and saline solutions. Additionally, the smooth interior wall design helps reduce chemical residue, ensuring the purity of fluid transport and preventing secondary pollution. Installation Compatibility: Plug and Play, Enhancing Assembly Efficiency The actuator and the ball valve adopt an integrated prefabricated design, with precise adjustments completed before leaving the factory, eliminating the need for additional on-site adaptation or complex calibration. During installation, it only requires a simple connection to the pipeline and control system to be put into use quickly, significantly shortening the assembly cycle of dosing devices and reducing labor costs. Precise Application Scenarios in Dosing Devices The core requirement of dosing devices is to accurately and proportionately feed chemicals in a “timed and measured” manner. The GRAT IoT mini electric ball valve plays a crucial role in various stages due to its characteristics: Chemical Metering Stage: Stable Flow Control Between the dosing pump and pipeline in the dosing device, the IoT mini electric ball valve can serve as a flow regulating valve, adjusting the opening in real-time based on feedback from sensors regarding water quality or process parameters. Multi-Chemical Switching: Quick Response with No Residue For scenarios where multiple chemicals, such as acidic and basic agents, are alternately dosed, the flow of the previous chemical is gradually decreased to zero before the flow of the next one is increased to the set value, thereby avoiding instantaneous mixing. Furthermore, the smooth inner surface of the ball valve ensures that the chemical residue is below 0.1%, further reducing the risk of cross-contamination. Pipeline Control: Remote Automated Operation In scenarios requiring scheduled dosing (such as regular disinfection of cooling water systems), the IoT mini electric ball valve can be controlled remotely to automatically open and close. This allows staff to operate without being on-site; they simply need to preset the dosing time and duration in the central control system, and the actuator will drive the ball valve to open or close on time, precisely executing the dosing plan. This feature is particularly suitable for unattended small dosing devices, reducing labor costs and minimizing human operation errors. Conclusion: Infusing “Precision and Efficiency” into Dosing Devices The GRAT IoT mini electric actuator, equipped with a plastic ball valve, perfectly meets the various control needs of dosing devices with its core advantages of “small size, high precision, strong corrosion resistance, and ease of integration.” From fine adjustment of chemical flow to safe switching between multiple chemicals, from remote automated operations to emergency responses in unexpected situations, it not only simplifies the dosing process but also enhances the stability and economic efficiency of the system. > GRAT IoT Mini Electric Actuator

Background In industrial combustion systems, the control of air volume through dampers is crucial for combustion efficiency, safety, and compliance with emission standards. A certain client needed to install a high-reliability control valve in a DN800 pipeline to regulate the air intake of the burner damper, ensuring a stable combustion process while meeting long-term operational requirements.GRAT electric control valve delivers precise flow adjustment, reliable signal feedback, and durable performance, making it ideal for this application. Operating Conditions Size: DN800Power: AC220VControl signal: On/off input,0-1kΩ feedbackPredict lifetime: 5 yearsRunning time: May,2012Function: Proportional Airflow Control Product Advantages & Features High Precision Control: Equipped with a highly sensitive electric actuator,with Backlash≤0.5%, Dead one≤0.5%, Feedback Error≤0.5%, the airflow adjustment error is kept within ±2%, preventing incomplete combustion or excessive air supply. Stable and Reliable Signal Feedback: The 0-1kΩ resistance feedback mechanism monitors the valve position in real-time, ensuring that the air-fuel ratio remains within the optimal range, thus maintaining the combustion system in its best operating condition at all times. Long Lifespan Design: The mechanical structure is optimized and made with wear-resistant, high-temperature materials to ensure stable performance during long-term operation, far exceeding the 5-year design lifespan. Wide Voltage Adaptability: Supports AC220V power supply, accommodating common voltage fluctuations in industrial environments to ensure stable operation. Easy Maintenance: Modular design allows for easy replacement of key components; only regular lubrication and inspections are needed, reducing maintenance costs by 50%. Performance Results The electric butterfly valve completes the airflow switch in 10 seconds, eliminating the risk of dioxin generation due to adjustment delays. After switching to the butterfly valve, fluid resistance decreases and the motor current of the fan drops by 11A, resulting in annual electricity savings of 220,000 kWh. The dust-free structure of the valve plate extends the maintenance interval to 6 months, reducing downtime by 120 hours annually. Since its operation commenced in May 2012, the valve has continued to function steadily, fully meeting the client’s stringent requirements for air volume control, far exceeding the expected five-year lifespan, and demonstrating exceptional durability. With its high reliability, precise control and long life, we have won the trust of customers by performing well in burner vent door air volume control. This case fully proves the excellent performance of GRAT products in the field of industrial automation control, providing efficient and stable valve solutions for global customers.

In petroleum and natural gas drilling engineering, cementing operations are known as the “throat of drilling engineering,” and their quality directly determines the integrity of the wellbore, the effectiveness of the oil and gas layer protection, and the lifespan of oil and gas field development. Electric plug valves, with their unique technological advantages, are gradually replacing traditional manual valves and have become the core control component of modern cementing operations. Challenges in Cementing Operations Cementing operations are complex and high-risk, placing stringent requirements on valves. During processes such as casing installation and cement slurry preparation, valves need to frequently switch states while ensuring absolute sealing under high pressure to prevent leaks, as well as rapidly responding to pressure fluctuations. However, traditional manual rotary valves rely on human labor and experience, which makes them prone to jamming and seal failure under high pressure. In particular, for cementing operations in deep oil and gas wells, where the bottom hole pressure often exceeds 70 MPa, the delays and uncertainties associated with manual operations increase the risk of well control. Technological Breakthroughs GRAT Electric plug valves offer significant advantages, compared to traditional manual rotary valves, making them a key to enhancing cementing efficiency: Effort-saving and efficient operation is the core advantage. In high-pressure environments, manual valves require considerable manpower and operate slowly, while electric plug valves, driven by a servo motor, can be switched on or off with a simple button press, greatly reducing human resource consumption and quickly responding during frequent state changes in cementing, minimizing time losses and improving operational progress. Stable and reliable switching performance ensures safety. Manual valve operation relies on tactile experience, which can lead to seal failures if not executed precisely. Electric plug valves ensure precise switching angles through meticulous control, maintaining complete sealing under high pressure to avoid leaks and other safety hazards. Ability to adapt to complex working conditions expands applications. In the face of harsh environments like high-bottom pressure and mud corrosion, electric plug valves are made from high-strength materials with special coatings that resist erosion. Their rational structure reduces friction loss, lowers the risk of failure, and enhances reliability and lifespan under complex conditions. Typical Application In horizontal well cementing, electric plug valves provide unique advantages: During staged cementing, traditional valves struggle to control the timing of the opening of staging collars, while electric plug valves can be programmed to automatically open when the cement slurry reaches the designed position, allowing for precise displacing. In deep-sea cementing, their remote control capability is critical. In the development of a deepwater gas field in the South China Sea, the team remotely operated underwater electric plug valves through a deck control cabinet to complete surface cementing at a water depth of 3000 meters, reducing single well operation time by 12 hours and avoiding the risks associated with diver operations. Intelligent Drive Ahead The widespread application of electric plug valves in cementing operations marks a significant milestone in valve technology iteration. Transitioning from human dependence to intelligent drive, GRAT leads petroleum engineering equipment towards intelligent and efficient advancement. In the dual pursuit of safety and development efficiency, they are becoming the “invisible guardians” of green oil and gas development, guiding cementing operations toward a more controllable and reliable future. > GRAT Explosion Proof Electric Actuator

1. Working Principle Electromagnetic Valve: Composed of an electromagnetic coil, valve core, and valve body. When not powered, the valve core is positioned in a specific location due to the spring; when powered, the electromagnetic force causes movement of the valve core to open or close the valve, with various types available. Electric Actuator: Composed of a motor, gear reduction mechanism, and controller. The motor drives the valve stem to actuate the valve core, while the controller manages the motor for automated control, categorized into quarter-turn and linear stroke types.       2.Working Characteristics Flow Coefficient and Pressure Differential: Electromagnetic valves have small flow coefficients and pressure differentials, suitable for small flow rates, low pressures, and frequent switching; electric valves have large flow coefficients and can withstand greater pressure differentials, suitable for high flow rates and high pressure pipelines. Drive Method and Voltage Surge Resistance: Electromagnetic valves are driven by an electromagnetic coil and are susceptible to voltage surges; electric valves are motor-driven and have strong resistance to voltage surges. Switching Speed and Applicable Scenarios: Electromagnetic valves switch quickly, used in applications with strict time requirements for small flow rates and low pressures; electric valves switch more slowly, suited for large flow rates and diameters where switching speed is not critical, allowing for precise control of opening. 3.Applicable Environments Electromagnetic Valve: Suitable for small pipeline control, shutoff of corrosive and toxic chemical pipelines, widely used in chemical production facilities and machinery fields; in special areas, specific requirements must be considered. Electric Actuator: Versatile in function, classified by functionality, applied across industrial automation, smart homes, medical equipment, agricultural equipment, and more, capable of controlling large pipelines and air systems, regulating flow rates in pipelines. 4.Pricing General Scenarios: The structure of an electromagnetic valve is simple, making it cost-effective and suitable for low-pressure scenarios. In contrast, electric valves (such as electric ball valves) have a relatively complex structure, integrating precision components like motors, transmission mechanisms, and valve bodies, resulting in a higher initial cost but offering more comprehensive performance. High-Pressure Scenarios: In high-pressure conditions, electromagnetic valves require special designs and materials to meet pressure resistance requirements, which significantly increases their price. Conversely, electric ball valves, due to their reliable and adaptable mechanical structure, maintain an excellent cost-performance ratio in high-pressure environments, making them more cost-effective for long-term use. 5.Other Aspects Protection Level: Electromagnetic valves have low protection levels, easily affected by external factors, potentially compromising performance in harsh environments.Our best electric actuators have high protection levels(IP68), effectively resisting dust and moisture. Action Time: Electromagnetic valves have fast action times, quickly completing switching actions (the valve core rapidly moves up and down due to the action of sucking and closing, with a short stroke distance).Electric valves have relatively longer action times (for quarter-turn valves, the valve core rotates from 0 to 90°, resulting in a longer stroke distance and slightly slower action time compared to electromagnetic valves). Functional Differences: Electromagnetic valves typically lack manual operation functionality. For emergency use, a bypass manual valve must be installed separately. These valves are generally limited to full open/full close operation only.Electric Actuators feature a manual override mechanism, allowing for operation during special circumstances and offering both on/off and modulating control capabilities. Additionally, the operating method of electromagnetic valves, which switches from open to closed, can lead to damage. For example, if the coil remains energized for extended periods, it may heat up and eventually burn out, which is a common failure. Conversely, electric actuators cut off power to the motor once the switch action is completed, possessing a position holding function, resulting in a relatively longer service life. In summary, technicians should comprehensively consider process requirements, pipeline control needs, budget constraints, and other factors to select suitable electromagnetic valves or electric actuators to achieve efficient and stable industrial pipeline control. > See How Our OEM Solutions Reduce Costs

In industries where every second counts—from emergency shutdowns to high-frequency batch processing—the GRAT Quick-Opening Electric Actuators deliver unmatched speed and reliability. Engineered for valves from DN15 to DN150, these actuators achieve 0-90° full travel in just 3-4 seconds, setting a new benchmark for rapid response in fluid control. Why Speed Matters: Emergency Readiness: Instant isolation of hazardous media (e.g., flammable gases, corrosive chemicals) mitigates risks. Throughput Optimization: Reduce cycle times in batch processes by up to 20% compared to standard actuators. Energy Efficiency: Minimize parasitic losses during frequent operations with optimized torque profiles. But raw speed alone isn't enough.To truly excel in industrial environments, rapid response must be paired with precision engineering. The GRAT Quick-Opening Electric Actuator achieves this through a symphony of mechanical innovation and intelligent control - where every millisecond of performance is backed by decades of valve automation expertise. Designed for Critical Speed and ReliabilityIn mission-critical applications where response time impacts safety and productivity, GRAT Quick-Opening Electric Actuator deliver 0-90° full rotation in 3-4 seconds (DN15-DN150). This rapid operation is achieved through: High-torque brushless motors with optimized gear ratios Zero-backlash gearing for instantaneous force transfer Smart acceleration profiles that prevent water hammer Built to Outlast Your EquipmentWith 100,000+ cycle durability verified in ISO 9001 testing, our actuators feature: DDS (Dynamic Duty System) calibration - One-touch setup adapts to any valve's breakaway torque Industrial-grade connectors and hermetically sealed electronics (IP68) Self-diagnostic firmware that alerts before maintenance is needed Engineered for Real-World InstallationsThe industry's most flexible mounting system includes: 360° adjustable mounting flange - Fits any valve orientation Corrosion-resistant alloys (316SS or nickel-plated options) -40°C to 80°C operating range with optional heating jackets Applications• Emergency shutdown systems (ESD)• Batch processing lines• Steam isolation valves From rapid 3-second actuation to mission-critical customization, GRAT Quick-Opening Electric Actuators are engineered to your exact needs. Whether you require ATEX-certified explosion-proofing, specialized voltage ranges, or fail-safe configurations, our team delivers tailored solutions that keep your operations fast, safe, and efficient. Contact GRAT automation specialists for your project's specific requirements. > GRAT Quick-Opening Electric Actuators

As a key solution for renewable energy storage, molten salt systems face extreme operational challenges 300°C- from 565°C temperatures to corrosive salt flows. Electric high-temperature ball valves serve as critical control components, ensuring both safety and efficiency in these demanding conditions. Grat now Shared some Solutions for a Greener Future. 1.Core Challenges and Valve Requirements in Molten Salt Thermal Energy Storage SystemsMolten salt thermal energy storage systems store and release thermal energy through circulating molten salt (typically nitrate mixtures). This process imposes unique valve requirements: ①Extreme Temperatures: Operating temperatures range from 300°C to 565°C, requiring valves to maintain reliable long-term sealing under continuous thermal stress. ②Medium Characteristics: Molten salt poses risks of solidification-induced clogging and high-temperature corrosion, demanding valves with erosion-resistant materials and anti-clogging designs. ③Precision Control: Rapid flow adjustment is essential for system responsiveness, necessitating valves equipped with high-accuracy electric actuators and tight shut-off capabilities. 2.Three Core Advantages of Electric High-Temperature Ball Valves To address the challenges of molten salt systems, electric high-temperature ball valves offer the following key advantages: ①High-Temperature Resistance & Anti-Binding Design High-Temperature Optimized Construction: The valve body is constructed from high-temperature stainless steel or specialty alloys, paired with graphite/metal hard-sealing for superior thermal stability. Anti-Binding Mechanism: Preload compensation technology between the ball and seat prevents jamming due to molten salt crystallization or thermal expansion/contraction. ② Intelligent Electric Actuation for Precise Control High-Precision Regulation: The electric actuator supports 4–20 mA signal feedback and integrates with DCS for real-time (second-level) flow and pressure adjustments. ③ Low Maintenance & Extended Service Life Self-Cleaning Flow Path: A full-bore design minimizes molten salt buildup, reducing clogging risks. Modular Maintenance: Quick-replacement stem and seal assemblies cut maintenance costs by over 40%. 3.The Critical Role of Electric High-Temperature Ball Valves in Molten Salt Systems ① Energy Storage Phase Precise Flow Control: Regulates molten salt inflow into storage tanks to prevent overpressure risks. ②Energy Release Phase Dynamic Flow Adjustment: Modulates molten salt transfer rates to heat exchangers, ensuring stable steam parameters for power generation. ③Safety Protection Emergency Shutoff: Instantly isolates pipelines during failures to prevent molten salt leaks and associated hazards. 4.Optimizing Valve Selection for Efficient Molten Salt Thermal Storage With 19 years of expertise in high-temperature valve solutions, Grat Control Valves empowers customers to achieve safe, stable, and long-term operation of thermal storage systems through: Custom-engineered designs tailored to extreme conditions Military-grade sealing technology for leak-free performance Smart control integration for precision and reliability Within Powering Zero-Carbon Energy with High-Efficiency Molten Salt Systems,Grat cutting-edge electric high-temperature ball valves are engineered to maximize molten salt system performance—delivering unmatched energy storage efficiency, operational reliability, and sustainable energy solutions. By integrating our high-performance valve technology, we ensure seamless thermal energy transfer while driving the next generation of zero-carbon power. Innovation for a Sustainable Future – Where advanced engineering meets molten salt energy optimization. > Wuhan Grat Control Valve CO.,LTD

Key Features: In industrial automation, actuator performance is critical to system stability and efficiency. GRAT's 20Nm IoT Micro Electric Actuator (WA-20PCU) combines compact design, high torque, and smart connectivity, optimized for quarter-turn valves (butterfly, ball valves, dampers). Ideal for industries like chemical, power, and wastewater treatment, it excels in applications such as burner gas flow control and mineral processing. 1.Four Key Advantages for GRAT 20Nm IoT Micro Electric Actuator ①Compact & Space-Saving DesignWith 1/3 smaller volume than conventional actuators of the same torque, its lightweight body and compact design save 30% installation space. Ideal for confined spaces like narrow pipelines or integrated equipment.   ②High Torque & Energy Efficiency• 20Nm Rated Torque: Effortlessly operates ball valves up to DN25, even with high-viscosity media.• Low Power Consumption: 10W design reduces energy use by 50%. Features a brushless motor with overload protection for extended lifespan and reliability.   ③Smart & Precise Control• 30-100% PWM Speed Regulation: Smooth operation with 0.5% position accuracy, ideal for burner adjustments.• Modbus Integration: Supports Modbus RTU/TCP for seamless PLC connectivity. Real-time status monitoring via OLED display with fault alerts.   ④User-Friendly & Fail-SafeManual/auto dual mode with hex wrench for quick emergency override during power failure, minimizing downtime.   2.Typical Application Scenario 1:Burner Gas Flow ControlIn gas systems, the EA-20 adjusts valve openings via Modbus the accuracy reached 0.5%.PWM speed regulation ensures smooth flow control, stabilizing flame while reducing energy costs. Scenario 2: Automated Valve Control for Desliming Bucket in Mineral ProcessingIn mining production lines, the EA-20's compact design fits confined spaces atop desliming buckets. It provides real-time valve position feedback via 4-20mA signal, while its torque-limiting mechanism prevents jamming and offers overload protection. The manual override function ensures quick maintenance and minimizes downtime, guaranteeing continuous operation.   GRAT's 20Nm IoT Micro Electric Actuator: Redefining Efficiency in Industrial AutomationFeaturing four core advantages - compact size, high torque (20Nm), 0.5% control precision, and ultra-low 10W power consumption - this actuator delivers exceptional performance in demanding applications. • Precision Gas Flow Control: Achieves 0.5% control accuracy in burner systems with smooth PWM stepless speed regulation for stable operation.• Robust & Energy-Efficient: The 10W ultra-low power design with intelligent overload protection ensures longevity, even in harsh environments like mineral processing desliming hoppers.• Seamless Integration: Modular design supports multi-protocol communication (Modbus RTU/TCP) for both standalone and system-integrated automation solutions. > Wuhan Grat Control Valve CO.,LTD