DIN PTFE Vacuum Expansion Joints (PN 10) – new design

PTFE Vacuum Expansion Joints allow full vacuum, also in case of large nominal widths and high temperatures.

Designs:

  • up to nominal pipe size DN 100 with two ears
  • from nominal pipe size DN 125 with three ears
  • up to nominal pipe size DN 65 with threaded holes
  • from nominal pipe size DN 80 with through holes

Flange materials:

  • carbon steel
  • stainless steel

Lining materials:

  • PTFE (virgin or conductive)

Flanges:

  • loose-loose

Other pressure levels:

  • on request

Special features:

  • limit bolts/hole extensions
  • earthing stud/lug

Optional extras:

  • final painting

DN

L

(mm)

Stroke

±

(mm)

Lateral offset

(mm)

Angular offset


(mm)

d4

(mm)

K

(mm)

smin

(mm)

a2

(mm)

No. of bolts

x

thread

Weights

(ca. kg/pc.)

100

150

12

3

4

158

180

7.5

22.5

8 x M16

19.0

125

150

12

4

4

188

210

7.5

22.5

8 x M16

24.4

150

150

12

4

4

212

240

7.5

25.5

8 x M20

29.8

200

150

15

5

4

268

295

7.5

27.5

8 x M20

44.2

250

150

15

6

4

320

350

7.5

29.5

12 x M20

53.4

300

150

20

7

4

370

400

7.5

32.5

12 x M20

77.6

350

160

20

7

4

430

460

7.5

37.5

16 x M20

102.1

400

160

20

8

3

482

515

7.5

37.5

16 x M24

118.5

500

160

20

9

3

585

620

8.0

38.0

20 x M24

130.1

600

170

20

10

3

685

725

7.0

37.0

20 x M27

173.7

700

170

25

10

2

800

840

7.0

37.0

24 x M27

208.0

800

170

25

11

2

905

950

7.0

37.0

24 x M30

252.9

900

170

25

12

2

1005

1050

8.0

38.0

28 x M30

278.2

1000

170

25

12

2

1110

1160

8.0

38.0

28 x M33

317.9

DN

Overpressure resistance

(105 Pa) at

Vacuum resistance

(105 Pa) at

23° C

200° C

200° C

100

3.0

3.0

-1.0

125

3.0

3.0

-1.0

150

3.0

3.0

-1.0

200

3.0

3.0

-1.0

250

3.0

3.0

-1.0

300

3.0

3.0

-1.0

350

3.0

3.0

-1.0

400

3.0

1.0

-1.0

450

3.0

1.0

-1.0

500

3.0

1.0

-1.0

600

3.0

1.0

-1.0

700

1.0

0.5

-1.0

800

0.5

0.3

-1.0

900

0.1

0.1

-1.0

1000

0.0

0.0

-1.0

Different nominal pipe sizes

and total lengths on request.

L = Total length

d4 = Raised face diameter

K = Bolt circle diameter

smin = Minimum flare thickness

Technical data valid for the pressure level PN 10.
a
2 depends on construction type and lining thickness.


The overpressure resistance is only valid at neutral position of the PTFE Vacuum Expansion Joint with limit bolts in place. The types of travel stroke, lateral offset and angular offset are maximum allowable movements in only one direction. For superpositioned movement the single types of travel need to be limited. The figures stated are average and apply to room temperature.