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  

 
1) Product Performance
LIWEI Rubber Flexbile Joints are designed for piping systems to absorb pipe movements, relieve stress, reduce system noise/vibration, compensate for misalignment/offset and to protect rotating mechanical equipment against start-up surge forces.

Rubber Flexbile Joints is a single sphere design with less length, the supply range is from 32mm to 3600mm, and design pressure can be 1.0MPa/1.6MPa/2.5MPa, which is always used where low cost or space limitation control.

2) Application Range
Equipped with the excellent comprehensive performances of flexible rubber joint, LIWEI Rubber Flexbile Joints can be used for lift and transportation of raw water and sewage, transportation of water supply, cooling cycle water of thermal power plant, condensate water of metallurgy industry and chemical materials of chemical industries, cooling and dilution of oil and chemical industries and flexible connection of other industries. LIWEI Rubber Flexbile Joints is also suitable to transport all grain and powder material and gas for its high abrasive resistance.

In addition, special notifications are hereby conducted for design units and clients so as to ensure the project quality. Please note to install anti-break stop device, if LIWEI Rubber Flexbile Joints are designed to install close to pump exit nozzle and pipes' corner. If your pipes need to be buried, please use our patent-buried protective devices. In a word, remark requirement for use, and we will provide satisfactory service to you.

3) Features and Benefits
1, Versatile hand-built construction. Made in China
2, Absorbs directional movement
3, Absorbs vibration, noise and shock
4, Compensates for misalignment
5, Wide flowing arch design
6, Virtually eliminates sediment buildup
7, Economical fully molded construction
8, High vacuum rating (up to 30" Hg) can be supplied for certain sizes
9, Special grooved flange ring design, prevent rubber end pull out
10, Solid galvanized steel floating flanges speed the installation time
11, High tensile aircraft cable is embedded in the raised face rubber ends to prevent pull out and avoids the sharp cutting edge of solid steel rings
12, No gaskets required; Integrally rubber flanged design, no gaskets required, DIN PN10/16 drilling standard, other flange drilling available, including ANSI 150lb/300 lb, BS, and JIS

Materials 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	Flange	Q235
5	Reinforcing ring	Steel wire rope

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   (100 D×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
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	1¼″	90	6	10			9		±7.5°
40	1½″	95	7	10			9		±7.5°
50	2″	105	7	10			10		±7.5°
65	2½″	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°