Hot Sales Four Sphere Rubber Expansion Joint

Henan Liwei Industry Co., Ltd.

Features:
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 to your requirement.
5. Anti-corrosion: EPDM and NBR rubber can bear high temperature and can anti-corrosion.
6. Four sphere flange end rubber joint: The rubber body has four bridges. It can bear more pressure and the length is long than single sphere rubber joint.
7. They are cost effective, the total cost is low because of rubber is cheap and it have long use life.

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


Production progress
1. Raw material: We never use reclaimed raw rubber, rubber is imported from USA. Before used, raw material should be tested, including physical test and some chemical experiment to test the hardness and so on;

2. Rubber pretreating and ingredients;

3. Milling: First, rubber plastication, second, rubber mixing, we will add rubber compounds, like sulfurzing reagent, surfactant, softener, stabilizer, foaming agent and some special compounds, at the same time, rubber will be extruded into plates, cut, produce 45 degree angle. The plates cannot directly be used, they should be cooled about 24 hours;

4. Molding: It will cost much time;

5. Vulcanizing: The largest vulcanizing tank in Asia ø 5000*15000, right time, temperature, pressure is very important;

6. Test and experiment: These tests should be done, hydraulic test, resistance to vacuum, displacement of the performance, rubber physical properties, thickness and the strength and other quality test;

7. Package: Out package the free of fumigation wooden case; Inside package: Plastic film and textile membrane.

Working site



Delivery time:
Within 30 days after receipt of the deposit, or as your request

Packaging details:
Unfumigation wooden case (out package) and plastic film and textile membrane(inside package). We can make change as your request.

Material list
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

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

Technical Parameters for Four-Ball Rubber Joint
DN		FF Length (mm)	Axis displacement		Radial displacement	Deflexion displacement
mm	inch		Extension	Compression
300	12″	500	100	130	80	±12°
350	14″	500	100	130	80	±12°
400	16″	500	100	130	80	±12°
450	18″	600	120	160	85	±12°
500	20″	600	120	160	85	±12°
600	24″	600	120	160	85	±12°
700	28″	600	120	160	85	±12°
800	32″	600	120	160	85	±12°
900	36″	600	120	160	85	±12°
1000	40″	600	140	180	95	±12°
1200	48″	600	140	180	95	±10°
1400	56″	650	140	180	95	±10°
1600	64″	650	140	180	95	±10°
1800	72″	650	140	180	95	±10°
2000	80″	650	170	200	100	±10°
2200	80″	700	170	200	100	±10°
2400	96″	700	170	200	100	±10°
2600	104″	700	170	200	100	±10°
2800	112″	700	170	200	100	±10°
3000	120″	700	170	200	100	±10°