Table of Contents
Advertisement
Installation
WARNING
Danger and damage due to high external loads on an actuator
unit!
Actuators are not "stepladders".
Loads may not be applied to the actuators as they can dam-
age or destroy the butterfl y valve.
Danger and damage due to heavy actuator units!
Actuators that are heavier than the weight of the butterfl y valve
can pose a danger to the user and cause damage to the pipe
system.
These actuators must be supported if they generate a bend-
ing stress on the butterfl y valve due to their size and/or in-
stallation situation.
NOTE
Damage to the butterfl y valve due to the incorrect setting of the
end stops!
The actuating device is adjusted to the operating data specifi ed
in the order.
The adjustment of the "OPEN" and "CLOSED" end stops is
the responsibility of the user.
5.4 Installing the butterfl y valve in the pipe
5.4.1
General
Transport the valve in its original packaging to the installation
site and unpack it only there.
Inspect the butterfl y valve and actuator for transport damage.
Damaged butterfl y valves or actuators may not be installed.
A functional test is to be carried out at the beginning of in-
stallation for manually-operated butterfl y valves: the butterfl y
valve must close and open correctly. Detected malfunctions
must be fi xed before commissioning. See also chapter 8
"Faults".
Handle the butterfl y valve with care and observe the instruc-
tions for the fl ange connection.
Make sure that only butterfl y valves are installed whose pres-
sure classes, connection type (fl ow rate), type of lining and
connection dimensions match the conditions of use. See the
corresponding marking on the butterfl y valve.
The counterfl anges must have smooth sealing surfaces. Other
fl ange shapes must be agreed upon with PFEIFFER.
5-2
DANGER
Danger due to exceeding the limits of use!
Exceeding the limits of use can pose a danger to the user and
cause damage to the pipe system.
No butterfl y valve may be installed whose permissible pres-
sure/temperature range is not suffi cient for the operating
conditions.
The max. permissible limits of use are marked on the butterfl y
valve, see Chapter "2 Markings on the device".
The permissible range is defi ned in Chapter "1 Safety instruc-
tions and safety measures".
The connection ends of the pipe must align with the butterfl y
valve connections and have plane-parallel ends.
The connection data for the actuator unit must match the con-
trol data. See the type plate(s) on the actuator unit.
Prior to installation, the butterfl y valve and the connected
pipe must be carefully cleaned of any contamination, in par-
ticular solid foreign matter.
The sealing surfaces on the fl ange connection and the utilized
fl ange seals must in particular be free of all contamination
during installation.
An arrow is marked on the body. The direction of the arrow
must correspond to the direction of fl ow in the pipe.
Info
It may be necessary in special cases for a butterfl y valve to be
tight against the direction of fl ow.
For installation in these special cases, contact PFEIFFER as this
could lead to an excessive strain on the seal ring, washer, etc.
When pushing the butterfl y valve and the required fl ange
seals into an already assembled pipe, the distance between
the pipe ends must be measured such that all contact surfaces
of the butterfl y valve and seals remain undamaged.
NOTE
Damage to the sealing surfaces and seals or untight fl ange
connection due to improper assembly!
Tighten the fl ange connections evenly and in a criss-cross
pattern with the torques indicated in Table 15-2.
After a long storage period, retighten the body screws. Also
retighten the screws of the adjustable compression spacers
according to Table 15-1 in Chapter 15.1.1.1.
EB 14b_EN
January 2022 edition
Subject to technical changes
Advertisement
Table of Contents
