PERFORMANCE

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  NR:

  NR rubber expansion joints are characterized by high elasticity, high elongation, excellent tear resistance and electrical insulation, good wear resistance and drought resistance, good processability, easy adhesion to other materials, and superior to most synthetic rubber in comprehensive performance.

  The disadvantages are poor oxygen and ozone resistance, easy aging and deterioration, poor oil and solvent resistance, low acid and alkali corrosion resistance and low heat resistance.

  Use temperature range: about – 60 +80.

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  EPDM:

  EEPDM rubber joint is also called EPDM rubber expansion joint. It is characterized by excellent ozone resistance, ultraviolet resistance, weather resistance and aging resistance, ranking first in general rubber. Electrical insulation, chemical resistance, impact elasticity is good, acid and alkali resistance, small proportion, can be filled with high coordination, heat resistance can reach 150 C, polar solvent-ketone, ester, but not resistant to aliphatic hydrocarbons and aromatic hydrocarbons, other physical and mechanical properties slightly inferior to natural rubber and superior to styrene-butadiene rubber.

  The disadvantage is that self-adhesive and mutual-adhesive are very poor, and it is not easy to bond.

  Use temperature range: about – 50 +150.

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  NBR:

  NBR rubber joint is also called NBR rubber connector. It is characterized by excellent gasoline and aliphatic hydrocarbon oil resistance, second only to fluorine rubber, and superior to other general rubber. Good heat resistance, air tightness, wear resistance and water resistance, strong bonding force.

  The disadvantages are poor cold and ozone resistance, low strength and elasticity, poor acid resistance, poor electrical insulation and poor polar solvent resistance.

  Use temperature range: about – 30 +100.

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  CR:

  EChloroprene rubber (CR) joints have excellent anti-oxygen, anti-ozone, non-flammability, self-extinguishing after ignition, oil resistance, solvent resistance, acid and alkali resistance, aging resistance, good air tightness and other advantages; their physical and mechanical properties are also better than natural rubber, so they can be used as general rubber and special rubber.

  The main shortcomings are poor cold resistance, large proportion, high relative cost, poor electrical insulation, easy to stick and roll, easy to scorch and easy to stick mold in processing. In addition, raw rubber has poor stability and is not easy to preserve.

  Use temperature range: about – 45 +100.

WORKING PRINCIPLE

PRODUCT PARAMETERS

NOTES:

1. Flange is available with DIN Standard,ANSI Standard,JIS Standard,and BS Standard.
2. The size is available DN32- DN3000
3. Please sent us letter and drawing for customization if you have special requirements.
4. If this product is used for supplying water for high place, anti-pull-off device should be installed if the pipe has or fixed bracket is not as no fixed stay or fixed bracket or the force of fixed bracket is not large than axial force.

PRODUCT ALBUM

INSTALLATION INSTRUCTIONS

1. Single sphere rubber expansion joint shall not exceed the displacement limit during installation.

2. In the installation of bolts to be symmetrical, to gradually pressure and tighten, to prevent partial leakage.

3. When the single sphere connector is laid flat, suspended, and vertically installed, the actual working axial displacement pressure of the rubber joint should be less than the supporting force of the pipeline, otherwise the anti-lifting device should be installed to prevent the work from being pulled.

4. The installation location of single sphere rubber expansion joint should be kept away from the heat source and ozone area. It is strictly forbidden to irradiate with strong radiation, expose to the sun and use the medium that does not meet the requirements of this product.

5. When the flexible rubber joint is transported, loaded, unloaded or installed, it is strictly forbidden to sharpen the surface sealing surface.

6. When installing DN200mm or above, please use butterfly valve special flange or small diameter flange for mating flange, so as to avoid flange pull-out, misalignment, sealing surface fracturing and water leakage after installation.