5-1
EB|LTR|43_EN
May 2023 edition
Subject to technical changes
Installation
5 Installation
The work described in this chapter may only be performed by
specialist personnel qualifi ed to perform the corresponding task.
Observe chapter 4.3 for transport to the installation site.
5.1 Installation conditions
Operator level
The operator level for the actuator is the front view on all operat-
ing elements of the actuator from the perspective of operating
personnel.
The plant operator must make sure that operating personnel can
carry out all work after the butterfl y valve is installed safely and
can access it easily from the operator level.
Pipe routing
Q Flow
a Entry length
b Run-out length
Figure|5-1: Entry and run-out lengths
Table|5-1: Entry and run-out lengths
Medium
state
Butterfl y valve conditions
Installa-
tion
length a
Run-out
length b
Gaseous
Ma ≤ 0.3 2 4
0.3 ≤ Ma ≤ 0.7 2 10
Vaporous
Ma ≤ 0.3
1)
24
0.3 ≤ Ma ≤ 0.7
1)
210
Wet steam
(Condensation percentage >5%)
220
Fluid
Cavitation free / w < 10 m/s 2 4
Sound cavitation / w ≤ 3 m/s 2 4
Sound cavitation / 3 < w < 5 m/s 2 10
Critical cavitation / w ≤ 3 m/s 2 10
Critical cavitation / 3 < w < 5 m/s 2 20
Flashing -220
Multi-phase -1020
1)
no wet steam
The entry and run-out lengths depend on various variables and
process conditions and are provided as a recommendation, see
Table 5-1.
If the lengths recommended by SAMSON LEUSCH are
signifi cantly undershot, contact SAMSON LEUSCH.
The guidelines applicable on site apply for the installation of the
butterfl y valve in the pipe.
Install the butterfl y valve so there is low vibration and no
mechanical tension, use a support if necessary. Observe the
sections “Installation orientation” and “Support and mounting” in
this chapter.
Install the actuator so there is enough space to replace the
actuator and butterfl y valve as well as to perform maintenance
and repair work.
Installation position
The butterfl y valves of the series LTR43 are designed such that it
is possible to position the actuator/butterfl y valve horizontally or
vertically, whereby the standard version is vertical. The agreed
and documented installation location must be observed. If it must
be adjusted contact SAMSON LEUSCH through the nearest
SAMSON offi ce.
Functional impairment of the actuator due to oil leaking from
the hand pump in case of an incorrect installation position!
Ö Observe the agreed and documented actuator and butterfl y
valve alignment.
Support and mounting
The plant manufacturer is responsible for the selection and
implementation of a suitable support or mounting for the installed
actuator as well as the pipe.
Attachments
When connecting the attachments, make sure that they can be
operated from the operator level safely and with easy access.
Venting
Vents are screwed into the exhaust air connections of pneumatic
and electropneumatic devices to ensure that the generated
exhaust air can be released to the outside (protection against
overpressure in the device). Furthermore, vents allow the intake
of air (protection against underpressure in the device).
Ö Ventilation must be oriented such that operating personnel is
not endangered. The operator must evaluate the hazard due
to noise and prevent it using suitable measures.
WARNING
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