Tel:+86-371-67447999
Fax:+86-371-67447888
E-mail:enquiry@lanphan.com
Add:NO.68 Mengjin Road, Shangjie District, Zhengzhou City, Henan Province, China
GJQ(X) series flexible rubber joint is a kind of flexible connection, mainly used to deliver liquid, gas, solid, etc. It adopts sphere body structure to compensate displacement, insulate vibration and reduce noise, which is a new rubber damping product.
Product Features:
1) Economy: Compared with the systems of mechanic stretching and material damping, it has the advantages of little space covering, light weight, easy assembly and disassembly, labor saving and low cost. Its smooth inner wall can reduce flow resistance. It has good water tightness, so there is no need of gasket during the installation. It has wide application, large temperature-resistance scope and long working life. (This product can be used for 20 years if it is used indoors. )
2) Displacement: Flange is free from pipe decentraction and imbalance. Its good flexibility allows compression, extension, distortion, deflection of vertical displacement, etc. Which can prevent the pipeline from damage of deformation and foundation settlement arising from expansion caused by heat and contraction caused by cold.
3) Shock and noise absorption: The large damping of rubber sphere can effectively buffer and isolate vibration, control and reduce mechanical vibration, and absorb fluid impact noise. The reasonable installation between vibrating machine and metal pipe can decrease structure-borne noise by 15-25 decibels.
4) Pressure resistance: The multilayered sphere structure can especially endure internal pressure, withstand strong blasting force and impact, and prevent deformation from external pressure. There are many pressure standards on work piece.
5) Reducibility: After external force compressed, it can recover to original state when this force is removed.
6) Wide application: Different rubber material and formula can make product possess different resistance to heat, oil, corrosion, age, abrasion and ozone.
2. 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) | Flange | Q235 | ||||||||||||||
5) | Reinforcing ring | Steel wire rope | ||||||||||||||
3. 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°C*48h 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 | |||||||||||||
4. Technical Parameters for Double Sphere Flexible Rubber Joint: | ||||||||||||||||
DN Diameter |
FF Length (mm) |
Axis displacement | Radial displacement |
Deflexion displacement |
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Type-I | Type-II | Type-I | Type-II | Type-I | Type-II | |||||||||||
mm | inch | Extension | Compression | Extension | Compression | |||||||||||
32 | 1¼″ | 165 | 30 | 50 | 45 | ±7.5° | ||||||||||
40 | 1½″ | 165 | 30 | 50 | 45 | ±7.5° | ||||||||||
50 | 2″ | 165 | 30 | 50 | 45 | ±7.5° | ||||||||||
65 | 2½″ | 175 | 30 | 50 | 45 | ±7.5° | ||||||||||
80 | 3″ | 175 | 30 | 50 | 45 | ±7.5° | ||||||||||
100 | 4″ | 225 | 35 | 50 | 45 | ±7.5° | ||||||||||
125 | 5″ | 225 | 35 | 50 | 45 | ±7.5° | ||||||||||
150 | 6″ | 225 | 35 | 50 | 45 | ±7.5° | ||||||||||
200 | 8″ | 325 | 35 | 60 | ||||||||||||
250 | 10″ | 325 | 35 | 60 | ||||||||||||
300 | 12″ | 325 | 35 | 60 | ||||||||||||
350 | 14″ | 325 | 35 | 60 | ||||||||||||
400 | 16″ | 400 | 40 | 60 |