1. Benefits

Flowing arch design prevents sediment buildup and reduces turbulence. Floating flanges can be rotated to accommodate torsion

misalignment. Molded spherical bellows accommodate up to one inch of axial movement and transverse deflection polyester-reinforced

nitrile tube earns high pressure rating without sacrificing flexibility; resists most hydrocarbons, oils and gasoline

2. Application Scope

Due to the sound complex performance of the rubber compensators, it is mainly used for the lift and transport of raw water and sewage,

and pipeline transportation of feed-water and water for cooling circulation in thermal power plants, condensed water in metallurgy and

chemical substances in chemical industry as well as dilution and flexible connection between short and long pipelines. Relying on the

high abrasion resistance of rubber, it is also suitable for the transportation under low temperature of powdery and grainy air in any

industry.

3. Material List :
No.		Name						Material
1)		Inner rubber lining						IIR,CR,EPDM,NR,NBR
2)		Outer rubber lining						IIR,CR,EPDM,NR,NBR
3)		Casing ply						Polyester cord fabric
4)		Flange						Q235A,stainless steel
5)		Strengthening ring						Q235A
6)		Stopper						Q235A,stainless steel
7)		Limit bar						Q235A,35#,stainless steel
8)		Nut						Q235A,35#,stainless steel
4. Physical and Mechanical Properties of Rubber Expansion Joint :
No.		Item							index				Measured value
									Inner/outer rubber lining
1)		Tensile strength (Mpa)							≥12				13.5
2)		Tensile yield (%)							≥450				560
3)		Tension set at break (%)							≤25				20
4)		Hardness (Shore A hardness)							60±5				60
5)		Brittleness temperature (°C)							≤-30				-40
6)		Cohesive strength (between cord fabric) (KN/m)							≥2.0				4.8
7)		100°Cx48h Hot air aging		Rate of Tensile Strength Reduction					≤25				15
				Rate of Ultimate Elongation Reduction					≤30				20
8)		Mass change (10%H2SO4*Room temperature) %							≤3				2
9)		Mass change (10%H2SO4*Room temperature) %							≤3				2
5. Technical Parameters for Double Sphere Flexible Rubber Joint :
DN Diameter			FF Length (mm)		Axis displacement						Radial displacement			Deflexion displacement
					Type-I		Type-II				Type-I	Type-II		Type-I	Type-II
mm	inch				Extension	Compression	Extension			Compression
32	1?″		90		6	10					9			±7.5°
40	1?″		95		7	10					9			±7.5°
50	2″		105		7	10					10			±7.5°
65	2?″		115		7	13					11			±7.5°
80	3″		135		8	15					12			±7.5°
100	4″		150		10	19					13			±7.5°
125	5″		165		12	19					13			±7.5°
150	6″		180		12	20					14			±7.5°
200	8″		210		16	25	30			35	22	25		±7.5°	±10°
250	10″		230		16	25	30			40	22	25		±7.5°	±12°
300	12″		245		16	25	30			40	22	25		±7.5°	±12°
350	14″		255		16	25	35			45	22	30		±7.5°	±12°
400	16″		255		16	25	35			45	22	30		±7.5°	±12°
450	18″		255		16	25	36			47	22	30		±7.5°	±12°
500	20″		255		16	25	36			48	22	30		±7.5°	±12°
600	24″		260		16	25	40			50	22	33		±7.5°	±12°
700	28″		260		16	25	40			55	22	33		±7.5°	±12°
750	30″		260				40			55		33			±12°
800	32″		260		16	25	45			55	22			±7.5°	±12°
900	36″		260		16	25	45			55	22	35		±7.5°	±12°
1000	40″		260		16	25	45			60	22	35		±7.5°	±12°
1100	44″		300				45			60		35		±7.5°	±12°
1200	48″		300		16	25	50			60	24	38		±7.5°	±10°
1300	52″		300				50			60		38			±10°
1400	56″		350				50			70		40			±10°
1500	60″		350				60			70		40			±10°
1600	64″		350		18	25	60			70	24	46		±7.5°	±10°
1800	72″		400		18	25	60			75	24	48		±7.5°	±10°
2000	80″		450				70			75		50			±10°
2200	80″		400				70			75		50			±10°
2200	88″		500				70			80		60			±10°
2400	96″		500				80			80		60			±10°
2600	104″		500				85			80		60			±10°
2800	112″		550				85			80		60			±10°
3000	120″		550				85			80		60			±10°