Installing The Valve In The Pipe; General - Samson EB 01a Mounting And Operating Instructions

Details about the other actuators can also be found in the corre-
sponding actuator documentation.
The dimensions provided in Table 5-3 reach a suitable pretension
that implements the sealing between the seat and the plug.
Table 5-3: Actual travel
Travel 15 mm
Travel 30 mm

5.4 Installing the valve in the pipe

5.4.1

General

NOTE
Damage to the lined valve surface due to improper transport
and installation!
Before and during installation, the lined surfaces can be dam-
aged and must be specifi cally protected.
Transport the valve in its original packaging to the installation
site and unpack it only there.
Handle the valve with care and observe the instructions for
the fl ange connection.
Damage to the plastic lined surfaces on the body due to
improper installation!
The use of PTFE fl ange seals is recommended.
The counterfl anges must have smooth sealing surfaces.
Other shapes must be agreed upon with PFEIFFER.
Inspect the valve and actuator for transport damage. Dam-
aged valves or actuators may not be installed.
A functional test is to be carried out at the beginning of in-
stallation only for manually-operated valves: The valve must
close and open correctly. Detected malfunctions must be fi xed
before commissioning. See also chapter 8 "Malfunction".
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 valve may be installed whose permissible pressure/tem-
perature range is not suffi cient for the operating conditions.
The max. permissible limits of use are marked on the valve,
see Chapter "2 Markings on the device".
The permissible range is defi ned in Chapter "1 Safety instruc-
tions and safety measures".
Make sure that only valves are installed whose pressure class-
es, connection type (fl ow rate), type of lining and connection
dimensions match the conditions of use. See the correspond-
ing marking on the valve.
EB 01a_EN
March 2023 edition
Subject to technical changes
Actual travel 16 to 17 mm
Actual travel 31 to 32 mm
The connection ends of the pipes must align with the valve
connections and have plane-parallel ends. Connection fl ang-
es that are not plane parallel can damage the PTFE lining
during installation!
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 valve and the connected pipe must be
carefully cleaned of any contamination, in particular 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 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 bellows, seat, plug, etc.
When pushing in the valve (and the fl ange seals) into an al-
ready assembled pipe, the distance between the pipe ends
must be measured such that all sealing surfaces (and seals)
remain undamaged.
NOTE
Tightening the fl ange connections.
The fl ange connections must be tightened in at least three steps at
the same time and in a criss-cross pattern with the torques indi-
cated in Table 15-7 or Table 15-8 in Chapter "15.1.1 Tightening
torques".
Torque wrenches must be used to ensure that the torque is
reached but not exceeded.
Tightening the body screws.
As the PTFE plastic sealing surfaces tend to fl ow, it is strongly rec-
ommended, after a long storage period of the lined valve, to
retighten the body screws after installation using the tightening
torques according to Table 15-1 to Table 15-4 in Chapter
"15.1.1 Tightening torques".
Vents are screwed into the exhaust air connections of pneu-
matic and electropneumatic devices to ensure that the gener-
ated 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).
Carry out venting on the side that faces away from the work-
ing area of operating personnel.
When installing peripheral devices, make sure that they can
be operated from the working area of operating personnel.
Installation
5-3