Thread Union Rubber JointThread rubber expansion bellows joint

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Thread rubber expansion bellows joint

  • thread union rubber joint 1
  • Rubber Bellows Joints
  • Rubber expansion bellows
  • Thread Rubber Bellows
  • thread union rubber joint 1
  • Rubber Bellows Joints
  • Rubber expansion bellows
  • Thread Rubber Bellows
  • [Name]: Thread rubber expansion bellows joint
  • [PN]: 0.6-2.5mpa
  • [Medium]: Air, water, seawater, oil, slurry, weak acid, alkali, etc.
  • [Material]: NR, NBR, CR, EPDM, PTFE etc.
  • [Certification]: ISO9001:2008
  • [Products]:Rubber Bellows Joints, Rubber expansion bellows, Thread Rubber Bellows

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    Rubber expansion joint has the characteristics of good sealing, light weighting, easy to fix and maintain, also has long working expecting,but please keep far away from sharp metal in order to avoid  breaking the rubber body. 

    Equipped with the excellent comprehensive performances of rubber expansion bellows, thread rubber bellows can be used for lift and transportation of raw water and sewarubberge, transportation of water supply, cooling cycle water of thermal power plant, condensate water of metallurgy industry and chemical materials of chemical industries, cooling and dilution of oil and chemical industries and flexible connection of other industries. It is also suitable to transport all grain and powder material and gas for its high abrasive resistance.

    Due to its good integral function,flexible rubber joint is used widely in key projects of chemical industry,construction,water supply,drainage,petroleum,light and heavy industry,refrigeration,health,fireproof and power,etc. 

    Rubber Bellows Joints:

    1, Versatile hand-built construction. Made in China 

    2, Absorbs directional movement

    3, Absorbs vibration, noise and shock 

    4, Compensates for expansion

    5, Wide flowing arch design

    6, Virtually eliminates sediment buildup

    7, Economical fully molded construction

    8, High vacuum rating (up to 30" Hg) can be supplied for certain sizes

    9, Special grooved flange ring design, prevent rubber end pulling out

    10, Solid galvanized steel floating flanges speed the installation time

    11, High tensile aircraft cable is embedded in the raised face rubber ends to prevent pull out and avoids the sharp cutting edge of solid steel rings

    12, No gaskets required; integrally rubber flanged design, no gaskets required, DIN PN10/16 drilling standard, other flange drilling available, including ANSI 150lb/300 lb, BS, and JIS

    Working pressure Mpa (kgf/cm2)

    1.0 (10)

    Angular deflection


    Explosion pressure Mpa (kgf/cm2)

    3.0 (30)

    Vacuum Kpa (mm/Hg)

    53.3 (400)

    Applicable Temperature

    -15℃-115℃(-30℃-250℃ under special conditions)

    Applicable media

    water, sea water, hot water, air, compressed air, oil, acid, alkali and so on


    Technical parameters of rubber bellows joints


    No. Part Material
    1 Body NR, CR, IIR, NBR, FKM, EPDM
    2  Inner & Outer Rubber NR CR IIR NR FKM EPDM PTFE
    3 Body Carcass Nylon cord fabric
    4 Reinforcing Ring Multi-strand coppering steel wire
    5 threaded union rubber joint Cast and forged carbon steel(Q235), Stainless steel(201, 304, 316, 321), Plastic(CPVC, PVDF, PPH, UPVC, RPP)


    Technical parameters


    Item |Medol KST-L-10 KST-L-16  
    If media is oil, acid or alkali, please inform us special requirements for working temperature and OEM orders with drawings or samples when ordering.
    MpaWoring pressure 1.0(10) 1.6(16)
    Mpa Burst Pressure 2.0(20) 3.0(30))
    Kpa Vacuum 53.3(400) 86.7(650)
    Applicable Temperature -20℃~+115℃(-30℃~+250℃ under special conditions)
    Applicable Medium Air, compressed air, water, sea water, oil, acid, alkali, etc.
    Note: the materials of main parts are the same with those of KXT type


    Main date


    Nominal Diameter
    LengthLmm Axial displacement mm Haorizontal isplacement mm Angular deflection(a1+a2)°


    A型 B型 Extension Compression
    15 0.5 180 200 5 10 20 45
    20 0.75 200 200 5 10 20 45
    25 1 210 200 5 10 20 45
    32 1.25 210 200 5 10 20 45
    40 1.5 220 200 5 10 20 45
    50 2 220 220 5 10 20 45
    65 2.5 240 240 5 10 20 45
    80 3 285 285 5 10 20 45

    Notes:1. For OEM orders with special requirement, threaded rubber expansion bellows should be made according to customers' drawings. Thread standard can be ISO, ASME, BS, JIS, etc. Material of rubber body can be NR natural rubber, EPDM, Neoprene, IIR butyl rubber, NBR Buna-N, FKM, etc.


    For more accurate quotation pls send us more details about the products you need:

    1. What's the DN and PN?

    2. What's the material?

    3. What's the connection(flange or thread)?

    4. What's the standard(ANSI, DIN, BS, JIS)?

    5. What's the medium working with?

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