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  • Negative pressure rubber joint
  • Negative pressure rubber joint
  • Negative pressure rubber joint

    Negative pressure rubber joint

    • [Product alias]: Flexible rubber joint, rubber soft connection
    • [Product Specifications]: [DN32mm-DN4000mm]
    • [Product pressure]: 0.6MPa-2.5MPa
    • [Shock absorption level]: A level
    • [Scope of application]: [Acid, alkali, corrosion, oil, hot water, cold water, compressed air, compressed natural gas, etc.]
    • [Product material]: The sphere is natural rubber, the flange is carbon steel, stainless steel
    • [Working temperature]: -40 degrees to 80 degrees (also can process high temperature resistant rubber joints)

    Negative pressure rubber joints have many names such as: shock absorbers, rubber shock absorbers and so on. Adding a negative pressure ring inside the rubber joint can greatly improve the safety of the large flanged rubber joint.

    product description

    Negative pressure rubber joints have many names such as: shock absorbers, rubber shock absorbers and so on. Adding a negative pressure ring inside the rubber joint can greatly improve the safety of the rubber joint. Negative pressure rubber joints are often used for cold water, hot water, compressed air, natural gas and other media. It has a special design, novel structure and good sealing performance to solve the pipeline burst due to thermal expansion and contraction and damage to pipeline connection equipment. Effective It improves the service life of the pipeline and protects the equipment.

    Product advantages

    Negative pressure comes from the inside of the pipe. Due to various reasons, the internal air is sharply reduced to form a suction state. The pipe can naturally withstand it. At this time, it depends on whether the rubber joint can completely resist it. If it cannot resist the negative pressure, the rubber joint will be damaged. Suction flat. The negative pressure ring is generally installed before the rubber joint assembly process. Since the negative pressure ring is as large as the interior, the negative pressure ring is generally installed before the rubber joint is assembled. Negative pressure rubber joints are manufactured by Xinli Company using a new process of air blowing molds. They are composed of inner rubber layer, reinforcement layer, middle rubber layer, outer rubber layer composite spheres and loose forged low carbon steel flanges. High pressure, good elasticity, large displacement, good vibration and noise reduction, and easy installation. Can be widely used in water supply and drainage, HVAC, fire protection, compressors, paper making, pharmaceuticals, ships, pumps, fans and other pipe systems.

    Performance characteristics

    Installing a negative pressure ring is an indispensable task for a rubber joint, because the positive pressure of the rubber joint can reach a high level, but the negative pressure will be reversed. For the installation of the negative pressure ring, the rubber joint is practical. Improve sexuality. The negative pressure ring is generally installed before the rubber joint is assembled. Because the negative pressure ring is as large as the interior, it is very troublesome to install the negative pressure ring after the rubber joint is assembled.
    1. Small size, light weight, good flexibility, convenient installation and maintenance.
    2. Horizontal, axial, and angular displacements can occur during installation, and are not restricted by the concentricity of the pipeline and the non-parallel flanges.
    3. The structure can reduce the transmission noise during work, and the shock absorption ability is strong.

    Classic Case

    Major pipeline construction projects in Dongguan cannot be guaranteed without Xinli's negative pressure rubber joints

    On the afternoon of the 11th, Zhang Ke, member of the Standing Committee of the Municipal Party Committee and executive deputy mayor, hosted a November briefing on major projects linked by city government leaders. The reporter learned from the conference that in November, the city ’s (Dongguan) major construction project completed an investment of about 4.89 billion yuan, accounting for 15.2% of the annual investment plan and 52.3% of the fourth quarter investment plan. From January to November, the accumulated investment in major construction projects totaled about 35.04 billion yuan, accounting for 120.7% of the January-November plan, accounting for 109.0% of the annual plan, and a year-on-year increase of 14.4%. In addition, there are 30 municipal management projects included in the provincial construction projects this year, and investment of 13.84 billion yuan was completed from January to November, accounting for 127.4% of the annual plan.
    The negative pressure rubber joints produced by Gongyi Xinli are strictly in accordance with national standards. Every step of the foaming work is accurate. We also have special testing equipment. We do 100% detection for each factory rubber joint. The principle of 100% quality is in place, and we wholeheartedly provide customers with good negative pressure rubber joints.

    schematic diagram

    260a6b401655468365c26c0843938aa3.jpg

    Material of parts

    No. Part Material
    1 Body Natural rubber (NR), neoprene (CR), butyl rubber (IIR), nitrile rubber (NBR), fluoro rubber (FKM), EPDM
    2 Inner & Outer Rubber Natural rubber (NR) Neoprene (CR) Butyl rubber (IIR) Nitrile rubber (NBR) Fluorine rubber (FKM) Ethylene propylene rubber (EPDM) Polytetrafluoroethylene (PTFE)
    3 Body Carcass Nylon cord fabric
    4 Reinforcing Ring Multi-strand coppering steel wire
    5 Flange Cast and forged carbon steel (Q235), Stainless steel (201, 304, 316, 321), Plastic (CPVC, PVDF, PPH, UPVC, RPP)

    Technical Parameters

    Item Item Model KXT-1 KXT-2 KXT-3 A, such as medium oil, acid and alkali substances
    B. Special requirements for working temperature
    C. You can also write to us to customize
    D. Please specify when ordering
    A. If media is oil, acid or alkali.
    B. If special requirements for working temperature
    C. If OEM orders with drawings or samples
    D. Please Inform us about above when ordering
    MpaWoring pressure 1.0 (10) 1.6 (16) 2.5 (25)
    Burst Pressure 2.0 (20) 3.0 (30) 4.5 (45)
    Kpa Vacuum 53.3 (400) 86.7 (650) 100 (750)
    Applicable Temperature -20 ℃ ~ + 115 ℃ (special up to -30 ℃ ~ + 250 ℃)
    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
    Nominal diameter DN
    Nominal Diameter
    (Mm)
    length
    LengthLmm
    Axial displacement
    Axial displacement mm
    Lateral displacement
    Haorizontal isplacement mm
    Deflection angle
    Angular deflection (a1 + a2) °
    mm

    Inch

    Extension Compression
    32 1.25 95 6 9 9 15
    40 1.5 95 6 10 9 15
    50 2 105 7 10 10 15
    65 2.5 115 7 13 11 15
    80 3 135 8 15 12 15
    100 4 150 10 19 13 15
    125 5 165 12 19 13 15
    150 6 180 12 20 14 15
    200 8 210 16 25 twenty two 15
    250 10 230 16 25 twenty two 15
    300 12 245 16 25 twenty two 15
    350 14 255 16 25 twenty two 15
    400 16 255 16 25 twenty two 15
    450 18 255 16 25 twenty two 15
    500 20 255 16 25 twenty two 15
    600 twenty four 260 16 25 twenty two 15
    700 28 260 16 25 twenty two 15
    800 32 260 16 25 twenty two 15
    900 36 260 16 25 twenty two 15
    1000 40 260 18 26 twenty four 15
    1200 48 260 18 26 twenty four 15
    1400 56 350 20 28 26 15
    1600 64 350 25 35 30 10
    1800 72 350 25 35 30 10
    2000 80 350 25 35 30 10
    2200 88 400 25 35 30 10
    2400 96 400 25 35 30 10
    2600 104 400 25 35 30 10
    2800 112 400 25 35 30 10
    3000 120 400 25 35 30 10
    Note: 1. Special requirements can be made according to user drawings. The flange standard adopts GB / T9115.1-2000. Optional (GB, JB, HG, CB, ANSI, DIN, BSEN, NF, EN, JIS, ISO etc. ) Standard flange production. Rubber spheres can be made of natural rubber, EPDM, neoprene, butyl rubber, nitrile rubber, fluorine rubber, etc.
    2. Use DN200 or higher product for suspended water supply. The pipeline must have fixed support or fixed bracket, otherwise the product should be installed with anti-pulling device.
    3. The user uses a rubber joint, and the corresponding flange should be a valve flange or a flange conforming to GB / T9115.1-2000.
    Notes: 1. For OEM orders with special requirement, rubber joints can be made according to customers' drawings. Generally, flange standard is GB / T9115.1-2000, other GB, JB, HG, CB, ANSI, DIN, BSEN, NF, EN, JIS, ISO flanges are also available upon request. Material of rubber body can be NR natural rubber, EPDM, Neoprene, IIR butyl rubber, NBR Buna-N, FKM, etc.
    2.When rubber joints size above DN200 are used for overhead water supply system, the pipes must be equipped with fixed supports or fixed brackets, otherwise control units shall be installed on rubber joints.
    3.Matching flanges of rubber joints shall be valve flanges or GB / T9115.1-2000flanges.

    Copyright Xinli Pipeline Equipment Co., Ltd. ICP record: Henan ICP No. 12016377

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