Langfang Dihong Energy Saving Technology Co., Ltd.
Your Trusted Partner for Insulation & Industrial Sealing Solutions
Welcome to Langfang Dihong Energy Saving Technology Co., Ltd., a professional Chinese manufacturer specializing in advanced thermal insulation materials and industrial sealing products for global markets.
Headquartered in Langfang, Hebei Province—one of Northern China’s key industrial hubs—we are committed to delivering energy-efficient, fire-safe, and high-performance solutions for building construction, HVAC systems, and industrial applications worldwide.
With strong manufacturing capability and export experience, Dihong has become a reliable long-term partner for customers across Europe, the Middle East, Southeast Asia, and other global markets.
Core Products: Engineered for Performance & Reliability
We focus on manufacturing a wide range of insulation materials and sealing products designed to meet demanding industrial standards.
Phenolic Insulation Boards (PF Boards)
Excellent Fire Safety: High fire rating performance (Class A / Class 0 equivalent to ASTM E84, BS 476 standards)
Superior Thermal Insulation: Extremely low thermal conductivity reduces energy loss effectively
Low Smoke & Low Toxicity: Safer performance in fire conditions, improving life safety
High Strength & Stability: Resistant to deformation, shrinkage, and harsh environments
Rubber Foam Insulation (NBR/PVC Foam)
Flexible & Easy Installation: Closed-cell structure allows quick cutting and fitting
Strong Thermal Insulation: Prevents heat loss and improves energy efficiency
Excellent Anti-Condensation: Effectively avoids water vapor and condensation issues
Durable & Weather Resistant: Long service life with strong aging resistance
Phenolic Insulation Pipe Sections
Precise Pipe Fit: Pre-formed design for fast installation and full coverage
Fire-Resistant Material: Maintains excellent fire safety performance
Energy Saving Performance: Reduces heat loss and prevents pipe sweating
Ideal for HVAC & Industrial Systems: Widely used in piping insulation projects
PTFE Sealing Products (New Product Line)
PTFE Gaskets (PTFE Sealing Sheets / Gaskets)
Outstanding chemical resistance to acids, alkalis, and corrosive media
Excellent sealing performance under high temperature and pressure
Low friction and non-stick surface for stable long-term operation
Widely used in pipelines, flanges, valves, pumps, and chemical systems
PTFE Packing (PTFE Sealing Rope / Packing)
Reliable sealing performance for pumps, valves, and rotating equipment
Excellent heat resistance for continuous industrial use
Strong chemical stability for harsh working environments
Long service life, reducing maintenance costs and downtime
Why Choose Dihong?
Integrated Manufacturer: One supplier for both insulation and sealing solutions
International Quality Standards: Products tested to meet global industry requirements
Strong Export Experience: Serving customers in multiple international markets
Factory Direct Pricing: Competitive cost with stable quality assurance
Customization Available: Sizes, density, and specifications can be tailored
Reliable Supply Chain: Stable production capacity and on-time delivery
Applications
Our products are widely used in:
Building Construction: Wall, roof, and facade insulation systems
HVAC & Refrigeration: Ducts, chillers, cold storage, pipe systems
Industrial Systems: Petrochemical, power plants, pipelines, and process equipment
Marine & Offshore: Shipbuilding and offshore insulation applications
Chemical Industry: Corrosion-resistant sealing and pipeline systems
Our Mission
At Dihong, we are committed to advancing global energy efficiency, safety, and industrial reliability through high-performance insulation and sealing technologies.
We help our partners reduce energy loss, improve operational safety, and achieve sustainable development goals.
