Introduction

We are proud to announce that Shandong Dofun Refrigeration Technology Co., Ltd. has been granted three new invention patents by the China National Intellectual Property Administration. These patents represent significant breakthroughs in valve technology and reinforce our position as an innovation-driven enterprise committed to advancing the global refrigeration and fluid control industry.

Patent 1: Modular Multi-Function Control Valve with Integrated Pressure Regulation

Technical Innovation

This patent covers a breakthrough modular valve design that integrates pressure regulation, shut-off, and filtering functions into a single compact unit. The innovative stacked-module architecture allows for:

• Field-configurable Functionality:​ Operators can reconfigure valve functions without pipeline disassembly
• Reduced Installation Footprint:​ 40% space saving compared to conventional multi-valve setups
• Integrated Sensor Ports:​ Built-in ports for pressure and temperature monitoring

Application Benefits

• Simplified maintenance in space-constrained refrigeration systems
• Reduced leakage points through consolidated connections
• Faster installation in commercial HVAC and industrial refrigeration projects

Patent 2: Cryogenic Valve with Anti-Icing Stem Sealing System

Technical Innovation

This invention addresses chronic icing and stem seizure in ultra-low temperature applications (-196°C). The patented solution features:

• Multi-stage Thermal Barrier:​ Creates graduated temperature zones to prevent cold transfer
• Self-regulating Heating Elements:​ Maintains optimal stem seal temperature without external controls
• Gas-purged Seal Chamber:​ Prevents moisture ingress and ice formation

Application Benefits

• Eliminates stem freezing in LNG, liquid nitrogen, and industrial gas applications
• Ensures reliable operation in cryogenic storage and transportation
• Reduces maintenance intervals by 60% in low-temperature environments

Patent 3: Smart Valve with Predictive Maintenance Capability

Technical Innovation

This patent represents our first step into IIoT-enabled valve technology, featuring:

• Embedded Wear Sensors:​ Monitor seat and seal degradation in real-time
• Wireless Data Transmission:​ Compatible with major industrial protocols (Modbus, Profinet)
• Self-diagnostic Algorithms:​ Predict maintenance needs 200-500 operating hours in advance

Application Benefits

• Transition from scheduled to condition-based maintenance
• Prevention of unplanned downtime in critical processes
• Integration with existing building management and SCADA systems

Impact on Industries We Serve

Cold Chain Logistics

The new technologies enable more reliable temperature control and reduce energy consumption in large-scale refrigeration facilities, directly addressing the industry’s sustainability challenges.

Chemical Processing

Enhanced materials and smart monitoring capabilities provide greater safety margins when handling corrosive or hazardous media.

Energy Systems

Improved reliability and predictive maintenance features help energy producers minimize downtime and optimize plant efficiency.

Dofun’s Commitment to Research & Development

These patents bring our total intellectual property portfolio to over 30 invention patents, reflecting our ongoing investment in innovation. Our R&D center in Liaocheng continues to focus on developing solutions that address the evolving needs of the global industrial valve market.

Conclusion: Innovation Driving Value

These patent grants demonstrate Dofun’s technical leadership and our commitment to providing customers with cutting-edge valve solutions. By continuously advancing valve technology, we help clients achieve higher efficiency, greater reliability, and lower total cost of ownership in their operations.

Experience Our Latest Innovations​

[View Our Patented Valve Series]

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Shandong Dofun Refrigeration Technology Co., Ltd. specializes in the research, development, and manufacturing of high-performance valves for refrigeration, HVAC, and industrial applications. With over 13 years of experience, we serve clients in more than 30 countries worldwide.