Richter GU/F Series, Инструкция по установке и эксплуатации

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Series GU/F
Page
10
9530-020-en Revision 15
TM 10477 Edition 05/2022
6.2 Sizing of the outlet line
Outlet lines are to be sized so that reliable
functioning of the valve is ensured under all
expected operating conditions.
The medium is to be discharged so that there is no
risk to people and the environment. The statutory
provisions (e.g. accident prevention regulations, and
the equivalents of the German Pollution Control Act or
the German Clean Air Code) as well as local
regulations (works standards) are to be observed.
♦
There must be no possibility of the overflow valves
becoming ineffective due to shut-off elements.
6.2.1 Admissible back pressure
♦
The outlet line must never be smaller than the
nominal diameter of the overflow valve outlet.
♦
The admissible back pressure in the valve outlet
must not be exceeded in order to prevent destruc-
tion of the bellows or a reduction in the discharge
capacity.
The overflow valve test certificate and the brochure
contain information of the manufacturer on admissible
back pressures.
6.2.2 Drainage of condensate
Lay horizontal pipes with a gradient away from the
valve so that the liquid medium cannot accumulate in
the valve body and that, in the case of gases, no
condensate collects in the body.
If outlet lines are laid with a geodetic level difference
(e.g. for vapours or gases with a 90° vertical upright
pipe bend out of the valve), the bend must not be
located directly downstream of the valve.
A horizontal pipe section with a gradient must firstly
be installed downstream of the valve.
A draining facility must be provided at the lowest point
in the pipe. This opening for the drainage of conden-
sate must be lower than the flow chamber of the body.
Fig. 3
6.2.3 Discharge conditions and reaction
forces
At low temperatures:
Outlet lines must be protected against
freezing. This applies in particular if gas
cooling as a result of expansion is to be
expected or lines are laid outdoors.
With crystallising media:
In the case of media which tend to
crystallise, solidify or stick, appropriate
action must be taken to ensure that the
solidification process cannot take place in
the inlet or outlet lines or in the body (e.g.
installed rupture disc, insulation, heating).
e.g. installed rupture disc, insulation, heating
With gassing media:
In the case of gassing or vaporising liquids,
adequately dimensioned flashtraps must be located in
the direct vicinity of the valve.
Reaction forces during discharge
The pipes and their holders are to be
dimensioned so that their weight forces and
the reaction forces and thermal loads
produced during discharge can be safely
absorbed.
Instructions for calculating the reaction forces are
contained in the Richter publication "Plan and install
overflow valves".
6.3 Valve connecting dimensions
The main dimensions are contained in the
dimensional drawing in Section 10.5 .