ANSI PTFE Vacuum Expansion Joints (Class 150) – 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 NPS 4“ with two ears
  • from nominal pipe size NPS 5“ with three ears
  • up to nominal pipe size NPS 2 1/2” with threaded holes
  • from nominal pipe size NPS 3” with through holes

Flange materials:

  • carbon steel
  • stainless steel

Lining material:

  • PTFE (virgin or conductive)

Flanges:

  • loose-loose

Other pressure ratrings:

  • on request

Special features:

  • limit bolts/hole extensions
  • earthing stud/lug

Optional extras:

  • final painting

NPS

 

 

L

 

(mm)

Stroke

±

(mm)

Lateral offset

 

(mm)

Angular offset


(mm)

d4

 

(mm)

K

 

(mm)

smin

 

(mm)

a2

 

(mm)

No. of bolts

x

thread (UNC)

Weights

 

(ca. kg/pc.)

4“

150

12

3

4

157.2

190.5

7.5

22.5

8 x ⅝“

19.9

5“

150

12

4

4

185.7

215.9

7.5

22.5

8 x ¾“

24.9

6“

150

12

4

4

215.9

241.3

7.5

25.5

8 x ¾“

28.8

8“

150

15

5

4

269.9

298.5

7.5

27.5

8 x ¾“

44.7

10“

150

15

6

4

323.8

362.0

7.5

29.5

12 x ⅞“

56.6

12“

150

20

7

4

381.0

431.8

7.5

32.5

12 x ⅞“

91.4

14“

160

20

7

4

412.8

476.3

7.5

37.5

12 x 1“

117.2

16“

160

20

8

3

469.9

539.8

7.5

37.5

16 x 1“

126.7

20“

160

20

9

3

584.2

635.0

8.0

38.0

20 x 1⅛“

130.1

24“

170

Please determine the desired standard - ASME B 16.47 Series A/B or

British Standard 3293 - when contacting our sales department.

28“

170

32“

170

36“

170

40“

170

NPS

 

 

Overpressure resistance

(105 Pa) at

Vacuum resistance

(105 Pa) at

23° C

200° C

200° C

4“

3.0

3.0

-1.0

5“

3.0

3.0

-1.0

6“

3.0

3.0

-1.0

8“

3.0

3.0

-1.0

10“

3.0

3.0

-1.0

12“

3.0

3.0

-1.0

14“

3.0

3.0

-1.0

16“

3.0

1.0

-1.0

18“

3.0

1.0

-1.0

20“

3.0

1.0

-1.0

24“

3.0

1.0

-1.0

28“

1.0

0.5

-1.0

32“

0.5

0.3

-1.0

36“

0.1

0.1

-1.0

40“

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

a2 = Minimum length with loose flange and smin

Technical data valid for the pressure rating Class 150.
a
2 depends on construction type and lining thickness.


The overpressure resistance is only valid at neutral position of the PTFE 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.