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Home >Products > Rubber Expansion Joint > Double Sph
Double Sphere Rubber Expansion Joint

1. The Lanphan GJQ(X)-SF Double Sphere Rubber Expansion Joint Supply range is from DN32 to DN3000.
2. Control units must be used when piping is not properly anchored.
3. The rated pressure 2.5MPa products will only be sold with control units.
4. The Liwei GJQ(X)-SF Double Sphere Rubber Expansion Joint Pressure rating is based on 30° C operating temperature.

E-mail:enquiry@lanphan.com
Product Description
Parameter
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Product Description

GJQ(X)-SF Double Sphere Rubber Expansion Joint

1) Product Performance

The Liwei GJQ(X)-SF Double Sphere Rubber Expansion Joint are double sphere designed with integral rubber flanges for tough, demanding industrial applications, as found in: Chemical/Petrochemical Plants, Industrial Process Piping Systems, Marine Services, Power Generation Plants, Pulp/Paper Plants, Steel Mills, Water/Wastewater and Pollution Control Systems.

Installed next to mechanical equipment or between the anchor points of a piping system to:

(1) Absorb Pipe Movement/Stress
(2) Reduce System Noise
(3) Isolate Mechanical Vibration
(4) Compensate Alignment/Offset
(5) Eliminate Electrolysis,
(6) Protect Against Start-Up Surge Forces.

The Liwei GJQ(X)-SF Double Sphere Rubber Expansion Joint is a twin sphere design with more length, the supply range is from 32mm to 3000mm, and design pressure can be 1.0MPa/1.6MPa/2.5MPa. Compared to Single Sphere Rubber Joint(GJQ(X)-DF- I, GJQ(X)-DF- II ), mechanical and acoustical performance can be almost double by changing to the most commonly specified twin sphere construction. Twin sphere designs are more flexible and allow greater movement.

2) Application Range

Equipped with the excellent comprehensive performances of flexible rubber joint, Liwei GJQ(X)-SF Double Sphere Rubber Expansion Joint 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.

It 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 GJQ(X)-SF Double Sphere Rubber Expansion Joint 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, Bellows to Absorb directional movement
3, Absorb vibration, noise and shock
4, Bellows Compensates for misalignment
5, More compensation capability
6, Embedded steel reinforce ring enable the pressure resistance
7, Solid galvanized steel floating flanges speed the installation time
8, Integral rubber flange design, prevent pulling out
9, 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
10, No gaskets required; DIN PN10/16 drilling standard, other flange drilling available, including ANSI 150lb/300 lb, BS, and JIS

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.

Note:
1. The Liwei GJQ(X)-SF Double Sphere Rubber Expansion Joint Supply range is from DN32 to DN3000.
2. Control units must be used when piping is not properly anchored.
3. The rated pressure 2.5MPa products will only be sold with control units.
4. The Liwei GJQ(X)-SF Double Sphere Rubber Expansion Joint Pressure rating is based on 30° C operating temperature.

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
6 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   (100degree×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″ 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            
450 18″ 400     65 70   70   ±12°
500 20″ 400     65 70   70   ±12°
600 24″ 400     70 75   75   ±12°
700 28″ 450     70 75   75   ±12°
800 32″ 450     70 75   75   ±12°
900 36″ 450     70 75   75   ±12°
1000 40″ 500     75 80   70   ±12°
1200 48″ 500     75 80   70   ±10°
1400 56″ 500     75 80   70   ±10°
1600 64″ 500     75 80   70   ±10°
1800 72″ 550     80 85   65   ±10°
2000 80″ 550     80 85   65   ±10°
2200 80″ 550     80 85   65   ±10°
2400 96″ 550     80 85   65   ±10°
2600 104″ 550     80 85   65   ±10°
2800 112″ 550     80 85   65   ±10°
3000 120″ 550     80 85   65   ±10°

 

Parameter
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
6 Reinforcing ring Steel wire rope

 

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