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:

Cable entry pressure filling indications

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)
Art. No.		Duct ID [mm]	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
	L 40	35	11	0
	L 45	45	32	0
	L 45	40	27	0
	L 50	50	33	0
	L 50	45	25	0
	L 60	60	42	0
	L 60	50	26	0
	L 80	80	57	0
	L 80	70	41	0
	L 90	90	70	0	2,6	37.7
	L 90	80	55	0
	L 100	105	80	0
	L 100	95	65	0
	L 115	115	89	0
	L 115	105	70	0
	L 125	125	97	20	2,1	30.5
	L 125	115	82	10	2,1	30.5
	L 150	150	119	42	1,8	26.1
	L 150	140	104	32	1,8	26.1
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
Sealing element type		-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	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 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"

[Translate to English:] Fülldruck-Messprotokolle „Einfluss der Umgebungs- oder Betriebstemperatur auf die Druckfüllung im Inneren der Abdichtkissen”

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.

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

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

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

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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Wolf GmbH Product page

Cable seals for telecommunication cables against water leakage and creeping gases