News

  • High-performance Metal Spring Energized PTFE Seals

    High-performance Metal Spring Energized PTFE Seals

    DEF has been available with various PEEK seals since before 2015. The most famous of these is a Spring seal made of PEEK. But do you really know anything about PEEK?  Today let’s take a look at this mysterious material PEEK (Polyether ether ketone) is one of the slowest developing and expen...
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  • DEF R&D team has completed the development of high-performance passivity yaw brake pad and is about to be released…

    DEF R&D team has completed the development of high-performance passivity yaw brake pad and is about to be released…

    DEF Seals have a technical team of 17 personnel, after two years of hard research and development, they finally found the most reasonable distribution of raw materials so far, that’s why we can see the high-performance passivity yaw brake pad now. passivity yaw brake pad belongs to friction mater...
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  • What is V-Packing? DEF Seals will let you know… (2nd chapter)

    What is V-Packing? DEF Seals will let you know… (2nd chapter)

    In the last article we talked about what V-packing is and some of its features and applications. As we said before, V-shaped seal ring is a shaped packing seal, the cross section of v-shaped lip seal ring. It has small working resistance, smooth operation, high pressure resistance, vibration resi...
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  • More wear resistance, longer service life—PTFE filled with 60%Bronze

    More wear resistance, longer service life—PTFE filled with 60%Bronze

    After more than 2 years of exploration, DEF Seals developed more wear resistance, longer service life Seals with material PTFE filled with 60% Bronze. This seal looks brighter than the traditional PTFE Bronze seals because it is filled with more bronze powder, so it looks golden. As we all know, ...
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  • PTC Power Transmission Exhibition of Asia was held as scheduled in Shanghai…

    PTC Power Transmission Exhibition of Asia was held as scheduled in Shanghai…

    On November 3, 2020, the annual PTC Power Transmission Exhibition was held as scheduled in Shanghai. As an exhibitor, DEF Seals have not been absent from the exhibition for more than 10 years. And every year, we can always bring a surprise to the buyers who come to the e...
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  • Spiral Polyester Resin fabric strip with Leading Advantages

    Spiral Polyester Resin fabric strip with Leading Advantages

    Polyester Resin fabric hydraulic seal is to guide the piston and piston rod of a hydraulic cylinder, as well as to withstand arising side loads. At the same time, it prevents any metal-to-metal contact, which will damage and score the surfaces and eventually cause seal damage, leakage and compone...
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  • Spring Seals with Food Grade-Virgin PTFE +Poly Material Customized Design

    Spring Seals with Food Grade-Virgin PTFE +Poly Material Customized Design

    Product Description The Spring Energized PTFE Seal is a spring- energized, pressure-assisted sealing device consisting of a PTFE (or other polymer) seal partially encapsulating a corrosion-resistant metal spring energizer. The PTFE jackets are precisely machined, filled ...
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  • All that stuff about the dust rings—Scrapers

    All that stuff about the dust rings—Scrapers

    What is scraper? The scraper (dust ring) is mounted on the piston rod to prevent external dust from mixing with the reciprocating seal of the hydraulic cylinder. Precautions for use of scrapers: All dust rings cannot bear pressure, that is, they do not have sealing func...
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  • What is OMKS?

    What is OMKS?

    The OMKS for heavy-duty piston seal is a composite seal ring composed of a PTFE rectangular slip ring and an elastomer. This type of coaxial seal is mainly used in hydraulic cylinder seal systems for heavy machinery or metallurgical equipment. Such as hydraulic press, in...
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  • What is V-Packing? DEF Seals will let me know…

    What is V-Packing? DEF Seals will let me know…

    What is V-Packing?  V-shaped seal ring is a shaped packing seal, the cross section of v-shaped lip seal ring. It has small working resistance, smooth operation, high pressur...
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  • A leader in polymer materials–——UPE

    A leader in polymer materials–——UPE

    UPE, Ultra-high Molecular weight compulsory (also known as UHMW-PE) is a thermoplastic engineering plastic with molecular weight higher than 1.5 million. With molecular chain length is 10 ~ 20 times of high density polyethylene, longer molecular chain (higher molecular w...
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  • Ten Excellent Properties of PEEK material

    Ten Excellent Properties of PEEK material

    DEF has been available with various PEEK seals since before 2015. The most famous of these is a Spring seal made of PEEK. But do you really know anything about PEEK?  Today let's take a look at this mysterious material PEEK (Polyether ether ketone) is one of the slowest ...
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