DF Sealing | Premium PTFE Gaskets, Spiral Wound Gaskets & Industrial Sealing Solutions

About DF Sealing

CIXI DONGFENG SEALING&PACKING Co., Ltd. is one of the leading manufacturers specialized in producing mechanical sealing products such as gaskets, sealing sheets, gland packing, tower packing, and O-rings for industrial applications.

Located in Cixi, Ningbo City — part of the developed Yangtze River Delta Zone — our strategic position ensures fast logistics. We are just 80 km from Ningbo Port and 200 km from Shanghai Port, enabling efficient global shipping.

ISO-Certified Manufacturing
15+ Years Industry Experience
Exported to 50+ Countries
Custom Solutions Available

Our Premium Sealing Products

Spiral Wound Gasket - CGI

Stainless steel core with inner and outer ring. Ideal for high-pressure and high-temperature applications in oil & gas and chemical processing.

Expanded PTFE Tape

Chemically inert, -190°C to +370°C operating range. Used for thread sealing in plumbing, gas, and chemical lines. Excellent dielectric strength.

PTFE Envelope EPDM Gasket

Dual-material design with PTFE outer layer and EPDM core. Resistant to acids, solvents, and steam. Perfect for corrosive environments.

FEP Encapsulated O-Ring

Full fluoropolymer encapsulation over silicone or Viton core. Superior chemical resistance and thermal stability up to 205°C.

Reinforced PTFE Gasket

Filled with glass fiber or carbon for enhanced strength and creep resistance. Suitable for flange sealing under dynamic loads.

PTFE Graphite Braided Packing

High thermal conductivity, self-lubricating. Used in pumps and valves handling hot water, steam, and mild chemicals.

Tellerette Packing Ring

High surface area packing for chemical towers and scrubbers. Improves mass transfer efficiency in distillation and absorption processes.

PTFE O-Ring

Zero outgassing, ultra-pure, FDA-compliant. Ideal for semiconductor, pharmaceutical, and food processing applications.

Reinforced Flexible Graphite Gasket

Excellent thermal stability and compression recovery. Used in heat exchangers, reactors, and high-temperature flanges.

Aramid Fiber Braided Packing

High tensile strength, heat resistant up to 300°C. Impregnated with PTFE for low friction. Used in high-speed pumps.

Carbon Fiber Packing with PTFE

Excellent wear resistance and thermal conductivity. Suitable for aggressive chemicals and high-pressure environments.

Pall Ring Tower Packing

Structured random packing for chemical towers. Enhances gas-liquid contact and reduces pressure drop in industrial columns.

Why Choose DF Sealing?

Superior Quality

All products are manufactured under strict ISO standards with rigorous quality control at every stage. We ensure consistency, durability, and reliability.

Global Reach

Serving clients in over 50 countries across North America, Europe, Asia, and the Middle East. Fast shipping from our Ningbo facility near major ports.

Custom Engineering

Need a non-standard size or material? Our team provides OEM/ODM services with custom tooling, packaging, and technical support.

Frequently Asked Questions

What materials do you use for gaskets?

We manufacture gaskets from expanded PTFE, reinforced PTFE, flexible graphite, EPDM, FEP, and various composite materials depending on temperature, pressure, and chemical exposure requirements.

Can you produce custom-sized gaskets?

Yes, we offer full customization for gaskets, packings, and O-rings. Provide us with your drawings, dimensions, or samples and we’ll manufacture to your exact specifications.

What industries do you serve?

Our sealing products are used in oil & gas, chemical processing, pharmaceuticals, food & beverage, power generation, water treatment, and semiconductor manufacturing.

Do you offer samples?

Yes, we provide free samples for qualified buyers. Contact us with your requirements and we’ll arrange shipment within 48 hours.

What certifications do you have?

We comply with ISO standards and our materials meet FDA, RoHS, and REACH requirements where applicable. Certification documents are available upon request.

Get in Touch

For inquiries about our products, pricing, or custom solutions, please visit our official website to contact the DF Sealing team directly.

Visit Official Website to Contact

Location

No.225 Jinsha Road, Cixi City, Ningbo 315300, China

Phone

+86-(0)574-63225670

Email

[email protected]

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