Rubber Expansion Joint, Flexible Rubber Joint

1.24 years manufacturing experience

2. ISO9001, ISO14001

3. Import rubber

4. China National Standards Drafting Unit of Rubber Joint

5. Qualified Joint Supplier in Nuclear Power Plant  

Characteristic:
1. This product could primarily reduce the vibration and the noise of the piping system, completely solve the different piping problems as displace of joint, axial flex and etc.
2. According to different material requirement, product could be made as acid proof, corrosion proof to suit different medium and environments.
3. The materials are 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 of the rubber body.
4. For flanges of other standards or non-standards. It is necessary to be agreed upon separately. Please specify standard of furnish diagram and relative parameter. We will manufacture accordingly. Rubber material may be selected according t your requirement.
5. Anti-corrosion: EPDM and NBR rubber can bear high temperature and can anti-corrosion.
6. Double sphere flange end rubber joint: The rubber body has two bridges. It can bear more pressure and the length is long than single sphere rubber joint.
7. The size can made as customer's drawing, we can make mould for special type.
8. They are cost effective, the total cost is low because of rubber is cheap and it have long use life.

Advantage of our rubber joint:
A. Ozone and chemical resistance
B. High temperature resistance
C. Excellent weather resistance
D. Anti-aging, anti-radiation, good flexibility, good elasticity
E. Excellent resistance of acids, aliphatic hydrocarbons

Our products have the following character:
Good select materials, advanced equipment, skillful workmanship, rigorous quality control standards, attractive design and durability. They are well-known for excellent quality, most competitive price, and lower cost and prompt delivery.

The product is made up of the composite rubber ball, including internal rubber layer, nylon fabric, and external rubber layer and the loose metal flange. With the merits of high pressure, stable elasticity, big displacement, good damping capacity and noise reduction, it is widely used in the systems of water supply, drainage, water circulation, heating and ventilating, and air conditioning, and the piping systems of the paper-making, the petrochemical industry, marine, compressors pumps, fans, etc

Physical and Mechanical Properties Form
No	Item		Index		Test value
			Inner rubber	Outer rubber
1	≥Tensile strength(MPa)		12	13	13.6
2	≥Break strength (%)		450	500	564
3	≤Break permanent deformation (%)		25	30	22
4	≤Brittleness temperature		-30	-30	-40
5	≥Viscosity(KN/m)		2.0	2.0	5.6
6	Aging hot air   (100D×48h)	Tensile strength change (%)	+25~-25	+25~-25	20
		Tensile rate change (%)	+10~-30	+10~-30	5
7	≥Acid resistant10%H2SO4×168h		0.7	0.7	0.85
8	≥Alkali proof10%NaOH1×68h		0.7	0.7	0.85

Material lists
No	Name	Material
1	Inner rubber	IIR\CR\EPDM\NR\NBR
2	Outer rubber	IIR\CR\EPDM\NR\NBR
3	Framework layer	Polyester cord fabric
4	Reinforcing bar	Polyester cord fabric
5	Flange	Q235

Technical Parameters for Three-ball Flexible Rubber Joint
DN		FF Length (mm)	Axis displacement		Radial displacement	Deflexion displacement
mm	inch		Extension	Compression
300	12″	450	75	90	70	±12°
350	14″	450	75	90	70	±12°
400	16″	450	75	90	70	±12°
450	18″	550	90	110	70	±12°
500	20″	550	90	110	75	±12°
600	24″	550	90	110	75	±12°
700	28″	550	90	110	75	±12°
800	32″	550	90	110	75	±12°
900	36″	550	90	110	75	±12°
1000	40″	550	105	125	85	±12°
1200	48″	550	105	125	85	±10°
1400	56″	600	105	125	85	±10°
1600	64″	600	105	125	85	±10°
1800	72″	600	105	125	85	±10°
2000	80″	600	120	135	90	±10°
2200	80″	650	120	135	90	±10°
2400	96″	650	120	135	90	±10°
2600	104″	650	120	135	90	±10°
2800	112″	650	120	135	90	±10°
3000	120″	650	120	135	90	±10°