NR Rubber expansion joint

NR rubber expansion joint is mainly used for reducing vibration, reducing noise, good flexibility and easy to use. NR flexible rubber joint takes advantage of elasticity, high air tightness, medium resistance, weather resistance and radiation resistance of rubber, and uses high strength, heat and cold stability polyester cord cloth obliquely crossed with it after high pressure and high temperature. The mould is vulcanized.

Features

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

Dimension: DN32mm-DN3000mm
Product pressure: 0.6-2.5 MPa
Flange material: carbon steel, stainless steel (304.316)
Service temperature: about- 60 +80.
Applicable media: ordinary water, air conditioning water, temperature below 80 degrees

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Absorbing axial motion (stretching and compression):

Axial motion is the change of dimension length of NR rubber joint from its free length in the direction parallel to its longitudinal axis..
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Absorbing lateral motion:

Lateral movement is the relative displacement of one end of NR rubber expansion joint with respect to the other end in the direction perpendicular to its longitudinal axis.
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Absorption angle and torsional motion:

Angular motion is the rotation displacement of the longitudinal axis of NR flexible rubber joint towards the rotation point. Torsion means that one end of the bellows twists the center line of the bellows relative to the other end.
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Reduce vibration:

NR pump connector isolates or reduces vibration caused by equipment. It reduces the transmission of vibration and protects the equipment from these adverse effects.

Nominal Diameter(DN)		Length L	Axial displacement		Horizontal Isplacement	Angular deflection
mm	inch	mm	Extension	Compression	mm	(a1+a2)
32	1¼	95	6	9	9	15º
40	1½	95	6	10	9	15º
50	2	105	7	10	10	15º
65	2½	115	7	15	11	15º
80	3	135	8	19	12	15º
100	4	150	10	19	13	15º
125	5	165	12	20	13	15º
150	6	180	12	25	14	15º
200	8	210	16	25	22	15º
250	10	230	16	25	22	15º
300	12	245	16	25	22	15º
350	14	255	16	25	22	15º
400	16	255	16	25	22	15º
450	18	255	16	25	22	15º
500	20	255	16	25	22	15º
600	24	260	16	25	22	15º

NOTES:

Flange is available with DIN Standard,ANSI Standard,JIS Standard,and BS Standard.
The size is available DN32- DN3000
Please sent us letter and drawing for customization if you have special requirements.
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.

Flexible rubber expansion joints shall not exceed the displacement limit during installation.
In the installation of bolts to be symmetrical, to gradually pressure and tighten, to prevent partial leakage.
When the rubber expansion joint 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.
The installation location of the rubber 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.
When the rubber connector is transported, loaded, unloaded or installed, it is strictly forbidden to sharpen the surface sealing surface.
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.