Samson BR 14t - LTR 43, Монтаж и эксплуатация

Страница: 23 / 56

5-5
EB | 14t_EN
June 2023 edition
Subject to technical changes
Installation
Upon request, the After Sales Service can provide you with sup-
port for the planning and implementation of a leak test speci
fi c to
your plant. Contact PFEIFFER.
The tightness of the packing, bonnet, fl ange and optional body
extension must be checked.
In the case of impermissible leakage, proceed as follows:
Tighten the packing (8)
Ö
Tighten the stuf fi ng box nuts (56) alternately and evenly using
the speci fi ed torques, see Chapter “15.1.1 Tightening tor-
ques”. Avoid tilting
Figure | 5-3: Correct tightening of the packing
Ö
Open and close the valve completely multiple times, if possi-
ble.
Ö
Repeat steps 1 and 2 until the required tightness is achieved.
Functional impairment of the butter fl y valve due to increased
friction resulting from an excessively tightened stuf fi ng box!
Ö
Make sure that the actuator shaft is able to move smoothly af-
ter tightening the stuf
fi ng box.
Ö
If the adjustable packing is not correctly sealed, contact
PFEIFFER.
Tighten the bonnet (7)
Ö
Tighten the bonnet screws (53) with the speci fi ed tightening
torque, see Chapter “15.1.1 Tightening torques”.
Ö
In the case of insuf fi cient tightness, contact PFEIFFER.
Tip
NOTE
Tightening the fl ange
Ö
Tighten the fl ange screws with the speci fi ed torque.
Ö
If the seal is not suf fi cient, the fl anges and fl ange seals must
be checked for damage and replaced if necessary.
Optional body extension (15) (insulation part)
Ö
Tighten the nuts (63) with the speci fi ed tightening torque, see
Chapter “15.1.1 Tightening torques”.
Ö
In the case of insuf fi cient tightness, contact PFEIFFER.
5.4.2 Checking the rotary movement
The rotary movement of the actuator shaft must be even (smooth).
5.4.3 Checking the fail-safe position
It must be checked if the valve moves to the fail-safe position in-
dicated on the actuator type plate, see Chapter “3 Design and
principle of operation”.