GESTRA VZ 10 User manual

1
EN
English
Pneumatic Rail Hook
VZ 10
Original Installation Instructions
810748-01

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Contents
Use for the intended purpose ............... .................................................................................................7
Safety Note.............................................................................................................................................7
Danger ...................................................................................................................................................7
Important Notes
Page
Explanatory Notes
Description .............................................................................................................................................8
Function .................................................................................................................................................8
Danger ...................................................................................................................................................8
Design....................................................................................................................................................8
Technical Data........................................................................................................................................ 9
Danger .................................................................................................................................................10
Tools.....................................................................................................................................................10
Operation
Annex
Spare Parts ..........................................................................................................................................11

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Dimensions
Fig. 1
615
540 ± 5
135 ± 5
100

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Functional Elements
540 – 650 mm
B
C
D
G
F
E
H
I
J
K
L
M
N
V
A
Fig. 2

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Function
Fig. 3
OP Q
RSTU

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Key
A
B
C
D
G
F
E
H
I
J
K
L
M
N
Nose
Push rod
Compression spring
O-ring
Compressed air cylinder
Spring for compensating the height variation
Washer
Hook for attaching to the cable
Hexagon screws M 8 x 20
Ring
Proximity switch
Protective hose
Split pin
Compressed air hose with rapid-action threaded coupling
Tank of the tank car
Rapid-action bottom valve
Height variation
Cable as per DIN 26 026
VZ 10
Rail
Auxiliary device (consisting of a tube, ∅63 mm)
Tube
O
P
Q
R
S
T
U
V

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Important Notes
Safety Note
The device may only be installed by qualified staff. “Qualified staff” are those persons who have achie-
ved a recognised level of competence appropriate to the installation and commissioning of this critical
safety device.
Danger
When the rail hook is released, there is a danger of injury to the legs and feet.
Use for the intended purpose
Do not use the pneumatic rail hook VZ 10 for any purpose other than keeping the bottom valves of tank
cars open.

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Explanatory Notes
Scope of Supply
VZ 10
1 Rail hook
1 Installation instructions
Description
According to TRB 851 Paragraph 4.2.5.3, loading plants for combustible gases in the region of storage
facilities with a capacity exceeding 30t must be equipped with an emergency shut-down system. In
the emergency shut-down system and in other dangerous situations, the rail hook VZ10 serves as the
safety link between the loading plant and the tank car. To ensure reliable functioning, there are two
necessary prerequisites:
The hydraulic or mechanical equipment of the tank car’s bottom valve must be equipped with a
cable as per DIN 26026 or UIC 573.
The rail on which the tank car is standing must have a cross-section corresponding to DIN 5902
type S-49. If this is not the case, the rail hook can be attached to the auxiliary device U.
Function
During the loading and unloading process, the rail hook VZ 10 is stretched between the cable and the
rail (see Fig. 3) and keeps the bottom valves open. The compressed air supply is not used to open the
bottom valves (it only serves the purpose of applying a compressive force to the compression spring
C). The spring Ffor compensating height variations prevents the rail hook from being torn off the rail
during emptying of the tank car. The proximity switch Ktriggers the emergency shut-down system if
the rail hook comes off the rail because of unintentional movement of the tank car.
Danger
Only dry instrument air may be used.
There is a danger of ice formation in the compressed air cylinder.
Design
VZ 10
Rail hook with pneumatic control and proximity switch.

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Explanatory Notes – continued –
Technical Data
Type (Pepperl & Fuchs) NJ 10-30 GK-N NJ 10-30 GK-SN
Rated voltage 8 V 8 V
Current consumption
Active surface exposed ≤3 mA ≤3 mA
Active surface covered ≤1 mA ≤1 mA
Permissible ambient temperature –25 °C to +100°C –40 °C to +100°C
Protection IP 68 to DIN 40050 IP 68 to DIN 40050
Control air
Pressure min. 3 bar
Pressure max. 10 bar
Length of compressed air hose and sensor cable
6 m
Response temperature of fire protection system
150 °C
Holding force of rail hook
350 N
Release of rail hook
Tank car movement distance ≤500mm
Materials of the casing
External parts bronze/brass (spark-proof).
Weight
Approx. 5.3 kg
Proximity switch

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Switching off the compressed air after the end of the loading process produces a very high
risk of injury due to the rail hook flying off the rail. Similarly, during this operating step there
is a risk of breakage of the rail hook.
Operation
1. If rail type is not S-49: Install an auxiliary device consisting of a tube, ∅63 mm U. Fig. 3
2. Push back the push rod Band position the nose Aso that it is at right angles to the longitudinal
axis of the rail hook.
3. Via the compressed air hose N, apply compressed air to the cylinder Eat a pressure in the range
3 bar to 10 bar.
Insert the hook Hin the eye of the cable, and pull the rail hook towards yourself. Before the
rail hook is attached to the rail, the distance between the washer Gand the tube Vshould be
approximately 40 to 50mm.
4. If the distance is greater than 50mm, the hook Hmust be adjusted so that the distance described
is achieved.
5. To adjust the hook H, undo the hexagon screws IM 8 and either pull the hook Hout or push it in.
6. Tighten the hexagon screws I, and use the rail hook as described in 3.
7. After the end of the loading process, remove the rail hook from the rail by hand. The bottom valves
close at the same time.
Danger
Open-end spanner, 13 mm A.F.
Tools

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Annex
Spare Parts
Part No. Name Stock code
3 Nose, 2.0975.01 048 417
2 Push rod, complete, 2.0401 079739
6 Compression spring, 1.4310 079756
7.3 O-ring 34, 52 x 3, 53, Busak + Luyken, NBR 079759
9.80 Washer, 2.0401 079745
9.10 Hook, 2.0401 079752
9.7 Ring, split, PA 043420
10 Proximity switch NJ10-30GK-SN 079757
or
proximity switch NJ10-30GK-N 079851
Pepperl & Fuchs
11.6 Compressed air hose DN 19, DIN 73411, 079763
rubber with fabric insert
4.4 Split pin 4 x 20 DIN 94, brass 013993
11.3 Rapid-action threaded coupling CK-1/4-PK-6-Festo, AL 079761
Part
A
B
C
D
G
H
J
K
L
M
N

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810748-01/09-2017cmp (808452-01) · GESTRA AG · Bremen · Printed in Germany
GESTRA AG
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