Cable entry filling pressure regulations

Sealing applications and filling pressure regulations for sealing elements
coated with swelling material or cellular rubber.

All products, with and without valve inflation technology.

Pressure filling

Pressure filling indications are printed on the sealing cushion
(reference value for installation-/ambient temperature +20 °C).

See example:

Filling tools

Pressure filling tool
with pre-setting pressure selection, auto shut-off
and separately 1.5 Ah rechargeable Li-Ion Battery.

Cordless air compressor
e.g. Art. No. 33 BDC-S

Filling device
(inflator hose)
e.g. Art. No. 33 EMS-150 &

Art. No. 33 E-VAS-3000

Automatic fill-stop
- essential for sealing element
  types 40 to 60

e.g. Art. No 33 DB VG8-M8

Inflating sealing elements types 40 - 60

Automatic fill-stop
Art. No. 33 DB VG8-M8

– essential for sealing element types 40 to 60

  • Screw the end cap onto the sealing element.
     
  • Attach inflator hose (end D) to the automatic fill-stop (end C).
     
  • Fig I: Attach end E to the valve and tighten with B, holding the valve extension immobile.
     
  • Fig II: Turn part A in the clockwise direction.
     
  • Pressure-fill the sealing element with air (CO2-neutral) using the cordless compressor and inflator
    hose e.g. Art.-No. 33 BDC-S.
     
  • The max. permissible filling pressure is printed on the packaging unit and on the sealing element itself.
     
  • Fig III: Loosen part A (turning it in the anti-clockwise direction).
     
  • Fig IV: Unscrew part B (anti-clockwise), holding the valve extension immobile, and remove the fill-stop valve.
     
  • After inflation of the sealing element, the valve end cap must be screwed finger-tight onto the valve (lengthens service life).

 

Tightness of 0.5 bar is reached immediately on water entry.

Inflating sealing elements types 80 - 300

  • Screw the valve end cap onto the sealing element.
     
  • Inflate the sealing element with air (CO2-neutral) using the cordless compressor and inflator hose e.g. Art. No. 33 BDC-S or the equivalent.
     
  • The max. permissible filling pressure is printed on the packaging unit and on the sealing element itself.
     
  • After inflation of the sealing element, the valve end cap must be screwed finger-tight onto the valve (lengthens service life).

Tightness of 0.5 bar is reached immediately on water entry.

Requirements for inflation tools

  • Filling capacity ≤ 20 litres/min
     
  • Automatic pressure shut-off or 0 to 4 bar pressure gauge
     
  • Accuracy of the pressure display in the 0.5-3.5 bar range at 20 °C (tolerance ± 0.1 bar)
     
  • Please observe our safety instructions when using sealing
    elements made of aluminium and synthetic material
    composites.

    SI 05 Part 1

Table 1 - Sealing areas & filling pressure

 Art. No.

 

 Duct ID [mm]

 Sealing area configuration

 Filling pressure
 at 20 ± 5 °C
 (68 ± ∆ 9 °F)

 Optimum [mm]

 Minimum [mm]

 [bar]

 [psi]

 16.1 QAK/V

 16.2 QAK/V

 16.3 ZKAK/V

 16.4 ZKAK/V

 16.8 0-AK/V

 19.1 SSB2

 19.2 SSB2

 19.3 ZKSB2

 19.4 ZKSB2

 19.8 0-SB2

 20.3 ZKADE/V

 20.4 ZKADE/V

 20.5 QADE/V

 20.6 QADE/V

 20.8 0-DE/V

 L 40

 40

 22

 0

 2,8

 40.6

 35

 11

 0

 L 45

 45

 32

 0

 40

 27

 0

 L 50

 50

 33

 0

 45

 25

 0

 L 60

 60

 42

 0

 50

 26

 0

 L 80

 80

 57

 0

 70

 41

 0

 L 90

 90

 70

 0

 2,6

 37.7

 80

 55

 0

 L 100

 105

 80

 0

 95

 65

 0

 L 115

 115

 89

 0

 105

 70

 0

 L 125

 125

 97

 20

 2,1

 30.5

 115

 82

 10

 L 150

 150

 119

 42

 1,8

 26.1

 140

 104

 32

 16.1 QAK/V

 16.2 QAK/V

 16.3 ZKAK/V

 16.4 ZKAK/V

 L 175

 175

 130

 70

 1,5

 21.8

 165

 115

 60

 155

 105

 50

 L 200

 200

 155

 90

 1,2

 17.4

 190

 140

 80

180

130

70

 L 225

 225

 175

 120

 215

 160

 110

 205

 150

 100

 L 250

 250

 190

 140

 1,1

 16.0

 240

 180

 130

 230

 170

 120

 L 275

 275

 230

 170

 1,0

 14.5

 265

 215

 160

 255

 205

 150

 L 300

 300

 250

 190

 0,9

 13.1

 290

 240

 180

 280

 225

 170


Group   16.1 and 16.2         QV  swelling material coating        19.1 and 19.2              20.5 and 20.6
             16.3 and 16.4         ZK  cellular rubber coating            19.3 and 19.4              20.3 and 20.4
             16.8 and 19.8         without coating                                20.8

The values provided in table 1 for operational filling pressure are based on an ambient and operational temperature of 20 °C ± 5 °C.
Due to the physical properties of compressed air as a function of temperature, the filling pressure will change depending on the ambient and operational temperature.

For this reason, an adjustment of the filling pressure must be adapted to the current ambient or operating temperatures during installation.

 

 Filling pressure [bar | psi] at installational-/ambient temperature
 [D ± 5 °C]  /  [D ± 9 °F]

 Sealing element type

 

 -20 °C

 -10 °C

 0 °C

 +20 °C

 +30 °C

 +40 °C

 +70 °C

 -4 °F

 14 °F

 32 °F

 68 °F

 86 °F

 104 °F

 158 °F

 QAK/V

 ZKAK/V

 

 SSB2

 ZKSB2

 

 ZKADE/V

 QADE/V

 L 40

 2,4 bar / 34.8 psi

 2,5 bar / 36.3 psi

 2,6 bar / 37.7 psi

 2,8 bar / 40.6 psi

 2,9 bar / 42.1 psi

 3,0 bar / 43.5 psi

 3,3 bar / 47.9 psi

 L 45

 L 50

 L 60

 L 80

 L 90

 2,2 bar / 31.9 psi

 2,3 bar / 33.4 psi

 2,4 bar / 34.8 psi

 2,6 bar / 37.7 psi

 2,7 bar / 39.2 psi

 2,8 bar / 40.6 psi

 3,1 bar / 45.0 psi

 L 100

 L 115

 L 125

 1,7 bar / 24.7 psi

 1,8 bar / 26.1 psi

 1,9 bar / 27.6 psi

 2,1 bar / 30.5 psi

 2,2 bar / 31.9 psi

 2,3 bar / 33.4 psi

 2,6 bar / 37.7 psi

 L 150

 1,4 bar / 20.3 psi

 1,5 bar / 21.8 psi

 1,6 bar / 23.2 psi

 1,8 bar / 26.1 psi

 1,9 bar / 27.6 psi

 2,0 bar / 29.0 psi

 2,3 bar / 33.4 psi

 QAK/V

 ZKAK/V

 L 175

 1,1 bar / 16.0 psi

 1,2 bar / 17.4 psi

 1,3 bar / 18.9 psi

 1,5 bar / 21.8 psi

 1,6 bar / 23.2 psi

 1,7 bar / 24.7 psi

 2,0 bar / 29.0 psi

 L 200

 0,8 bar / 11.6 psi

 0,9 bar / 13.1 psi

 1,0 bar / 14.5 psi

 1,2 bar / 17.4 psi

 1,3 bar / 18.9 psi

 1,4 bar / 20.3 psi

 1,7 bar / 24.7 psi

 L 225

 L 250

 0,7 bar / 10.2 psi

 0,8 bar / 11.6 psi

 0,9 bar / 13.1 psi

 1,1 bar / 16.0 psi

 1,2 bar / 17.4 psi

 1,3 bar / 18.9 psi

 1,6 bar / 23.2 psi

 L 275

 0,6 bar / 8.7 psi

 0,7 bar / 10.2 psi

 0,8 bar / 11.6 psi

 1,0 bar / 14.5 psi

 1,1 bar / 16.0 psi

 1,2 bar / 17.4 psi

 1,5 bar / 21.8 psi

 L 300

 0,5 bar / 7.3 psi

 0,6 bar / 8.7 psi

 0,7 bar / 10.2 psi

 0,9 bar / 13.1 psi

 1,0 bar / 14.5 psi

 1,1 bar / 16.0 psi

 1,4 bar / 20.3 psi

Example: Effects of unsuitable filling pressure

An unsuitable filling pressure can impair the transmission properties of the sealed cables and damage casing pipes, medium pipes, etc.

 

Diagram:      Benchmarks „Change in sealing element filling pressure
                       depending on the ambient temperature“

 

Example:    Measurement reports filling pressure
                   "Influence of ambient or operating temperature on the filling pressure inside the sealing cushion"

 

Reasons why the filling pressure must be adapted to the current ambient or operating temperatures during installation.

Consequences of unreduced filling pressure at operational temperatures of -15 °C to +70 °C

Adaptation of filling pressure to ambient & operational temperatures

1. Ambient or operational temperature > +25 °C

Annular space sealing

(the sealing element is between the borehole/ outer casing duct and the plastic inner duct made of plastic):

Reduction of the prescribed filling pressure
by 0.5 bar as shown in Table 1 can prevent
the plastic inner casing tube from collapsing.

2. Ambient or operational temperature > +45 °C

Cable sealing

(the sealing element is between the borehole/ outer casing duct. the plastic inner duct made of plastic. and telecom cables):

Reduction of the prescribed filling pressure
by 0.5 bar as shown in Table 1

3. Operational temperature < +70 °C at cable sheath or duct (for local heating)

Cable sealing

Reduction of the prescribed filling pressure
(Table 1) by 0.8 bar can prevent buckling of
cable (5a) and/or microduct (5b) and bursting
of the cable seal.

4. Operational temperature < +70 °C at cable sheath or duct (for local heating)

Power cable acc. to DIN EN 61442 (short circuit):

Reduction of the prescribed filling pressure (Table 1)
by 0.8 bar can prevent buckling of cable (5a) and/or
icroduct (5b) and bursting of the cable seal.

1    Outer casing duct

2    Transmission station etc.

3a  Sealing cushion (valve)
      16.1 and 16.2 QAK/V L
      16.3 and 16.4 ZKAK/V L
      16.8 0-AK/V L
      20.3 and 20.4 ZKADE/V L
      20.5 and 20.6 QADE/V L
      20.8 0-DE/V L

3b  Pliable metall valve extension
      (with thread adhesive on the sealing cushion)
      Art. No. 83.8 MSR-VV

5a  Electrical and/or optical
      telecommunication cables

5b  Inner casing duct or power cable


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