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GB/T12777-2008 DN32 to DN1600 mm externally pressurized expansion joints
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GB/T12777-2008 DN32 to DN1600 mm externally pressurized expansion joints

Fustar externally pressurized expansion joints are designed to fluid pressure acts on the outside of the bellows element rather than on the inside,as in a conventional expansion joint.The stabilizing effect of external pressure increase the bellows capability to absorb long axial movement without squirm,making this expansion joint the best solution for many situations involving extensive axial movement.
Availability:
Quantity:
  • DN150
  • Fustar
  • 73072900

Externally Pressurized Expansion Joints

The end bellows of this type externally pressurized expansion joint are connected with outer cylinder and inner cylinder respectively, and the convolution no.s of bellows are larger. externally pressurized can absorb large axial displacement under external pressure. During installation, the direction of inner sleeve should be consistent with the flow direction of the medium (flow direction mark on the expansion joint); After installation on the spot, the small ite rods must be removed; In order to reduce the force of the tube frame, this bellows expansion joints can be pre-distorted before installation(pre-pull, pre-press).

轴向外压式

轴向外压式

   External Pressurized Expansion Joint

Drawing


NO

ITEMS

MATERIALS

NO

ITEMS

MATERIALS

1

Short

connection tube

Carbon steel

7

Bellow

SS304/SS316L/SS321

2

Left ring plate

Carbon steel

8

Long

connection tube

Carbon steel

3

Inner sleeve

SS304/Carbon steel

9

Middle

connection tube

Carbon steel

4

Shell

Carbon steel

10

Right ring plate

Carbon steel

5

Guide ring plate

Carbon steel

11

Fixed plate

Carbon steel

6

Outer

connection tube

Carbon steel

12

Flange

SS304/Carbon steel


Technique Parameter of External Pressurized Expansion Joint

Normal Diameter

  Length

    Axial

Movements

         Axial 

      Stiffness

   Joint Size

 D X S

Radial  Max. 

Size D1

   Working 

   Pressure

  mm

mm

  mm

N/mm

mm

mm

Mpa

100

490~800

30~80

180~460

Ø108X4

340

0.25~4.0

150

500~860

32~80

169~410

Ø219X4.5

440

0.25~4.0

200

560~880

40~140

310~720

Ø219X6

529

0.25~4.0

250

560~1090

48~146

389~862

Ø273X8

570

0.25~4.0

300

720~1360

56~172

420~910

Ø325X8

650

0.25~4.0

350

720~1360

60~172

463~1059

Ø377X8

675

0.25~4.0

400

720~1360

60~172

637~1273

Ø426X10

740

0.25~4.0

500

760~1360

72~168

799~1598

Ø529X10

880

0.25~2.5

600

760~1510

72~168

1536~3568

Ø630X10

1030

0.25~2.5

700

760~1510

76~180

1815~3630

Ø720X10

1120

0.25~2.5

800

760~1510

76~180

1291~2583

Ø820X12

1260

0.25~2.5

900

760~1510

76~180

1548~2809

Ø920X12

1380

0.25~2.5

1000

760~1510

76~180

1573~2936

Ø1020X12

1480

0.25~2.5

Theyre the regular sizes based on pressure of PN16 above, we can design and produce according to users detail required sizes and conditions.

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Taizhou Fustar Trade Co,.Ltd

Add: City East Development Zone,Jiangyan Area,Taizhou City, Jiangsu Province, China
Mobile(WhatsApp): 86-17321605009
Tel: 86-523-88588220
Fax: 86-523-88588220
Email: sales@jsbellows.com
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