7100
040-551
2021-03
E
Operating Manual
Model/Series:
Number:
GB
Version:
Rev.
Page 4 of 14
©
DEUBLIN
1.1.1 Example of Application
In this example, the principle of the rotating union is described on the basis of a two-way version with
flanged rotor. Other models of series 7100 operate in the same way.
Fig. 1: Schematic diagram two-way version
A rotating union is installed at one end of the shaft, e.g. a two-way version as in this example. The latter
is fitted with two pipes
(A)
through which the consuming equipment is supplied with hydraulic oil. The
medium leaking from the rotating union is carried off through a leakage line
(B)
in a controlled way.
1.2 Misuse
This chapter provides information on known misuse of rotating unions of the 7100 series.
The rotating unions are not suitable for the areas and applications described herein. Use in such areas
or for such applications constitutes a misuse endangering people and machines and is therefore pro-
hibited.
Prohibition for the following areas:
Q
Potentially explosive areas
The rotating unions of the 7100 series shall not be used in potentially explosive areas, as they
are not approved for the requirements in potentially explosive areas. Operation in such areas
may cause explosions.
Q
Food
Food, cleaning and disinfectant residues cannot be removed from the rotating unions. People
may suffer poisoning.
Prohibition for the following applications:
Q
Conveying of combustible media or hydrocarbons
Combustible media or hydrocarbons may ignite or cause explosions.
Q
Connection to a piping system with excessive pressure
If excessive pressure is applied to the rotating unions, supply pipes can come off and cause
personal injury or property damage.
Q
Operation without lubrication
Dry operation (without medium) of the rotating union causes damage to the axial face seals.
Q
Connection to fixed pipes
If connection is via fixed pipes, the rotating unions may leak and the ball bearings may get dam-
aged.
Q
Conveying of media which are too hot
If the media exceed the maximum admissible temperature for the rotating union, the static seals
(elastomeric seals) can be damaged which may result in leaky rotating unions and personal in-
jury or property damage.
This list is not comprehensive and will be updated with results from product observation.
B
A
