DIN standard rubber expansion joint bellows

Update£º2013/5/28 10:11:23      Click£º
  • Brand   Liwei
  • Model   
  • Description

    DIN standard rubber expansion joint bellows is also called rubber bellows,rubber expansion joint,fle...

Product Introduction

DIN standard rubber expansion joint bellows is also called rubber bellows,rubber expansion joint,flexible rubber joint,and gb rubber joint effect is the same,just the flange with German standards,a change in the length of a sphere.
DIN standard rubber expansion joint bellows according to the pipe is the main purpose of heat bilges cold shrink and have the effect of compensating pipe,and can reduce the vibration and noise,from the fundamental solution of various pipe interface displacement,axial expansion and heart problems.
DIN standard rubber expansion joint bellows flange to flange,material can be carbon steel,flange surface treatment is galvanized,for steel forging and become,once again said the forging flange,material good,generally used in medium is water,hot water pipes.
DIN standard rubber expansion joint bellows of the medium can be:water,hot water,water,air,weak acid,weak base,oil etc.
Rubber expansion joint bellows of JIS standard material for natural and synthetic rubber,commonly can also be:nitrile butadiene rubber,silicone rubber, epdm,natural and synthetic rubber with medium of water pipeline,nitrile butadiene rubber use for oil pipeline with the media,silicone rubber with weak alkali pipeline,EPDM in use and hot water pipes.
Rubber bellows joint installation convenience simple,JIS standard for flange to the main body not adhesion,flange can rotate 360 degrees,not because the other pipe flange is welded or fixed Installation problem,caused by single when installation will need to diagonal to tighten the bolt.
DIN standard rubber expansion joint bellows of the matters needing attention:due to the rubber joint main body for the rubber,so avoid contact with sharp metal,in order to avoid punctured sphere;Also can't use in strong sunlight,medium unstable environment,in order to avoid influencing service life;When meeting line pressure is too high should also be on rubber joint spacing device.

NO.

Name

Material

1

Inner and outer layer

NR,EPDM,NBR

2

framework

Polyester cords

3

Vacuum ring

Stainless steel

4

Flange

Carbon steel,stainless steel

Model

I

II

III

Working pressure MPa(Kgf/cm2)

1(10)

1.6(16)

2.5(25)

burst pressure MPa(Kgf/cm2)

3.0(30)

4.8(48)

5.5(55)

vacuum KPa(mmHg)

53.3(400)

86.7(650)

100(750)

Application TEMP. ¡æ

-15~115 to -30~250

Application medium: water,seawater,oil,acid,alkali,etc.

 

DN

L(mm)

D(mm)

Bolts
n

d0(mm)

D1

axial displacement (mm)

mm

inch

extension

compression

32

11/4

95

140

4

18

100

6

9

40

11/2

95

150

4

18

110

6

10

50

2

105

165

4

18

125

7

10

65

21/2

115

185

4

18

145

7

13

80

3

130

200

8

18

160

8

15

100

4

135

220

8

18

180

10

19

125

5

170

250

8

18

210

12

19

150

6

180

285

8

22

240

12

20

200

8

205

340

8

22

295

16

25

250

10

240

395

12

22

350

16

25

300

12

260

445

12

22

400

16

25

350

14

255

505

16

22

460

16

25

400

16

255

565

16

26

515

16

25

450

18

255

615

20

26

565

16

25

500

20

255

670

20

26

620

16

25

600

24

260

780

20

30

725

16

25

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