Spectron FE51-SP2A User manual

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2GES_FE51-52-53SP+FE121SP_1116.docx
Contents
Contents ................................................................................................................................2
1.Introduction ...............................................................................................................3
1.1General information ..................................................................................................3
1.2Description of the Series FE51/52/53-SP and FE121-SP ........................................3
1.3Intended use .............................................................................................................4
1.4Personnel requirements............................................................................................5
2.For your safety..........................................................................................................5
2.1Symbols used ...........................................................................................................5
2.2Essential safety information......................................................................................5
2.3Safety devices...........................................................................................................6
3.Description ................................................................................................................8
3.1Overview - structure..................................................................................................8
3.2Functional description.............................................................................................10
3.3Technical data.........................................................................................................10
3.4Connection options ................................................................................................. 11
3.5Check valve in the purge gas inlet (9): ................................................................... 11
4.Operation ................................................................................................................ 11
4.1Labelling.................................................................................................................. 11
4.2Installing the cylinder pressure regulator ................................................................12
4.3Putting the cylinder pressure regulator FE51/52/53-SP2A into operation ..............13
4.4Putting the cylinder pressure regulator FE51/52/53-SP2 and FE121-SP into
operation .................................................................................................................13
4.5Putting the cylinder pressure regulator FE51/52/53-SP3 into operation ................14
4.6Changing the cylinder on cylinder pressure regulator FE51/52/53-SP2A ..............15
4.7Changing the cylinder on cylinder pressure regulator FE51/52/53-SP2 and
FE121-SP ...............................................................................................................15
4.8Changing the cylinder on cylinder pressure regulator FE51/52/53-SP3.................16
4.9Taking out of operation ...........................................................................................17
5.Faults ......................................................................................................................17
6.Maintenance, cleaning and repairs.........................................................................18
6.1Regular maintenance work and visual inspections.................................................18
6.2Regular cleaning.....................................................................................................18
6.3Repair information...................................................................................................18
6.4Returns ...................................................................................................................18

GES_FE51-52-53SP+FE121SP_1116.docx 3
1. Introduction
1.1 General information
Validity
This Operating Manual applies to cylinder pressure regulators of Series FE51/52/53-SP and FE121-SP.
Manufacturer
Spectron Gas Control Systems GmbH
Fritz-Klatte-Straße 8
D-65933 Frankfurt
Deutschland / Germany
Telephone: [phone]
Fax: [phone]
E-mail: [email protected]
Internet: www.spectron.de
Publication date
October 2016
Retention and completeness
This Operating Manual is a component part of the cylinder pressure regulators of Series FE51/52/53-SP
and FE121-SP and must be stored in a place where it is accessible to authorised persons at all times.
Under no circumstances may chapters be removed from this Operating Manual. If the Operating Manual
is lost or pages are missing – in particular the chapter "For your safety," – it/they must be replaced
immediately.
Copyright
This Operating Manual contains information protected by copyright law.
It must not be photocopied, reproduced, translated or copied onto data carriers, either in full or in part,
without prior authorisation. All rights reserved.
Updates
No update service is provided for this Operating Manual by Spectron Gas Control Systems GmbH.
Changes to this Operating Manual may be made without further notification.
1.2 Description of the Series FE51/52/53-SP and FE121-SP
Cylinder pressure regulators of the FE51/52/53-SP and FE121-SP Series are single-stage cylinder pressure
regulators with pressure gauges for measurement of the inlet and outlet pressure. The main task of the
cylinder pressure regulator is to reduce the inlet pressure to the outlet pressure required for the specific
application.
The letters "SP" denote cylinder pressure regulators equipped with a purge device
The purge device is used, for example, in applications where penetration of atmospheric gas into the gas-
wetted area of the downstream pipe system up to the connected equipment is not desirable, requiring
purging of the atmosphere before the pipe system is connected.
The purge device is also used to flush toxic or corrosive process gas from the pressure regulator before it is
removed from the gas cylinder, e.g. when changing the cylinder, preventing such gases in unpurged fittings
reaching the surrounding atmosphere.

4GES_FE51-52-53SP+FE121SP_1116.docx
1. Introduction
1.3 Intended use
Intended use
Cylinder pressure regulators of Series FE51/52/53-SP and FE121-SP are intended for use with corrosive
gases up to quality 6.0. The permissible gases and pressure ranges are specified on the type plate.
Cylinder pressure regulators reduce a variable inlet pressure to an outlet pressure which is as constant as
possible.
Introduction of pressure for the process gas is effected via the inlet screw fitting (e.g. cylinder connection).
Appropriate measures must be taken to prevent the introduction of pressure via the pressure regulator
outlet.
Cylinder pressure regulators with the designation FE51/52/53-SP2A can be purged with the process gas via
the two valves installed in the outlet.
Cylinder pressure regulators with the designations FE51/52/53-SP2, FE51/52/53-SP3 and FE121-SP are
equipped with an additional inlet valve, providing the option of purging the fitting with a separate purge gas.
Pressure regulators without electrical components (such as a contact pressure gauge or pressure
transducer) may be used in potentially explosive atmospheres, since they do not have a potential ignition
source of their own (ignition hazard evaluated in accordance with DIN EN 13463-1).
The ignition hazard has to be taken into account with pressure regulators with electrical components. The
ignition hazard must be evaluated based on the documentation for the respective electrical components,
taking into account their incorporation into the overall system, and Directives 2014/34/EU (ATEX 114) and
1999/92/EC (ATEX 137) must be observed.
Foreseeable misuse
The following operating conditions are deemed to constitute misuse:
Operation with gases that are not specified on the type plate
Use with gases in their liquid state
Operation outside the permissible technical limit values
Non-observance of the legal regulations and other
provisions valid on-site
Failure to comply with this Operating Manual
Failure to carry out inspection and maintenance work
Failure to heed the information on the type plate and in the product data sheet
Pressurisation counter to the normal direction of flow
The mixing of gases via the normal gas inlet and the purge gas inlet

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6GES_FE51-52-53SP+FE121SP_1116.docx
2. For your safety
TRAS (technical regulations on plant safety) publications
BGV A1 German trade association basic accident prevention regulations
BGR 104 German trade association rules on explosion protection
BGR 132 German trade association rules for the avoidance of ignition hazards resulting from
electrostatic charges
BGR 500 2.26 German trade association rules on welding, cutting and related work procedures
BGR 500 2.31 German trade association rules for working on gas lines
BGR 500 2.32 German trade association rules for the operation of oxygen systems
BGR 500 2.33 German trade association rules for the operation of systems that handle gas
2.3 Safety devices
The pressure regulator is equipped with an integrated relief valve to protect the fitting. The versions with
outlet pressures >100 bar do not have a relief valve. The user must ensure there is a suitable safety device
installed downstream!
Note!
The relief valve allows gas that has to be released as a result of an impermissible rise in the
outlet pressure to be blown off.
It does not function as the safety valve for the entire gas supply system.
Caution!
In the event of failure of the pressure regulator and its relief valve, a safety mechanism that
meets the requirements of the regulations for operators must be incorporated to protect
downstream fittings, pressure vessels and pipes from excess pressure.
Danger!
With combustible, toxic, corrosive and other gases that are harmful to health or the environment,
an exhaust pipe must be connected to the relief valve to discharge the gas safely.
The factory setting of the relief valve must not be changed!
Possible hazard Measures for prevention
Risk of fatal injury!
As cylinder pressure regulators with a purge device are
predominantly used with toxic and/or corrosive gases, it
must be ensured that the purged gases are safely
discharged and disposed of correctly.
Connect a pipe routing the purged gases to a recycling
facility to the waste gas valves of the cylinder pressure
regulator.
Risk of fatal injury!
If oxygen comes into contact with oil or grease, there is a
risk of fire due to a chemical reaction.
Keep all components which come into contact with oxygen
completely free of oil and grease.
Risk of fatal injury!
Gas escaping into the ambient air can ignite; there is a risk
of fire and explosion.
Smoking and naked flames are strictly prohibited in the
vicinity of gas supply systems


GES_FE51-52-53SP+FE121SP_1116.docx 7
2. For your safety
Risk of fatal injury!
The pressure regulator may be damaged by unauthorised
changes or modifications and may no longer work as
intended. There is a risk of the system malfunctioning,
catching fire or being damaged.
No changes or modifications may be made without the
written approval of the manufacturer's authorised technical
experts.
Risk of fatal injury!
If gases other than those specified on the type plate are
used, there is a risk of the system malfunctioning, catching
fire or being damaged.
Use only for the gases indicated on the device.
If there are no gas types specified on the pressure
regulator, the manufacturer must be consulted to establish
which gases it can be used with.
On no account may the pressure regulator be put into
operation without this information.
Risk of fatal injury!
Where the pressure regulator is operated with combustible,
toxic or corrosive gases, the respective gas can escape into
the environment if the relief valve is triggered.
The relief valves of pressure regulators for combustible,
toxic or corrosive gases must be equipped with a pipeline
routing the escaping gases to a safe and legally compliant
recycling facility.
Risk of fatal injury!
Gas escaping in an uncontrolled manner in closed rooms
can reduce the oxygen content in the air to a potentially fatal
level.
The blow-off pipe of systems operated in closed rooms
must be routed into the open air. Toxic, corrosive or
otherwise environmentally harmful gases must be
disposed of in accordance with the applicable regulations.
Risk of fatal injury!
Oxygen escaping in an uncontrolled manner in closed
rooms can lead to a dangerous rise in the oxygen content in
the air, increasing the risk of clothing and objects igniting.
Route the blow-off pipe of oxygen systems operated in
closed rooms into the open air, and avoid open flames.
In addition, observe the instructions in EIGA document NL
79/04/D.
Risk of fatal injury!
If components which are not suitable for the pressure range
of the cylinder pressure regulator are connected, they may
rupture under the pressure load.
All accessories to be connected (screw fittings, pipes,
fittings etc.) must be suitable for the pressure range
specified on the type plate of the cylinder pressure
regulator.
If the pressure regulator is used outside the specified
ambient temperature range, there is a risk of the system
malfunctioning, catching fire or being damaged.
Do not use in ambient temperatures below −30°C or over
+60°C.
Dirt particles getting into the pressure regulator can damage
it or cause it to malfunction.
It must be ensured that no dirt particles of any kind can get
into the pressure regulator. For this reason, there is a filter
incorporated into the process gas inlet of the pressure control
panel.
Incorrect handling and improper use may result in danger to
the user and other persons and damage to the equipment.
Use and handle the pressure regulator only as described
in this Operating Manual.
If the connecting surfaces or gaskets of the fittings are
damaged or missing, there is a danger of gas escaping in an
uncontrolled manner.
Check the connecting surfaces for damage, and do not
install if the connecting surfaces are damaged or gaskets
are missing.

8GES_FE51-52-53SP+FE121SP_1116.docx
3. Description
3.1 Overview - structure
Cylinder pressure regulator FE51/52/53-SP2A (with valve combination for purging with process gas)
Verbraucher
Abgas
2
PI
1
PI
Abgas
Cylinder pressure regulator FE51/52/53-SP2 (with valve combination for purging with purge gas)
Verbraucher
Abgas
2
PI
1
PI
Spülgas
1
2
3
5
7
6
4
8
1
2
3
5
7
6
4
9

GES_FE51-52-53SP+FE121SP_1116.docx 9
3. Description
Cylinder pressure regulator FE51/52/53-SP3 (with valve combination for purging with purge gas)
Verbraucher
Abgas
2
PI
1
PI
Abgas
Spülgas
Cylinder pressure regulator FE121-SP (with valve combination for purging with purge gas)
Verbraucher
Abgas
2
PI
1
PI
Spülgas
Pos. Designation Description
1 Gas cylinder valve In accordance with the applicable national standard
2 Cylinder connection In accordance with the applicable national standard
3 Inlet pressure gauge Indicates the current cylinder or inlet pressure.
4 Relief valve Protects the cylinder pressure regulator against excess pressure.
5 Outlet pressure gauge Indicates the current outlet pressure.
6 Handwheel Used to set the outlet pressure.
7 Process gas valve Used to close off the process gas pipe
8 Waste gas valve Used to close off the waste gas line
9 Purge gas valve Used to close off the purge gas line
1
2
3
5
7
6
4
8
9
2
3
4
7
6
9
5

10 GES_FE51-52-53SP+FE121SP_1116.docx
3. Description
3.2 Functional description
Cylinder pressure regulators of the FE51/52/53-SP and FE121-SP Series are single-stage cylinder pressure
regulators with pressure gauges for measurement of the inlet and outlet pressure. The main task of the
cylinder pressure regulator is to reduce the inlet pressure to the outlet pressure required for the specific
application.
The maximum inlet pressure depends on the specific application and will normally vary during operation.
The outlet pressure should remain as constant as possible. The outlet pressure is set via the pressure
regulator handwheel.
The fittings described here are equipped with various valves depending on the variant (see diagrams in
Section 3.1) for purging of the cylinder pressure regulator itself or the connected pipe system.
The purging process serves three essential purposes – above all in the context of gas applications for
sensitive processes and / or with toxic / corrosive gas applications:
1. In certain processes for which specific gas atmospheres are required, it is necessary to prevent the
surrounding atmosphere penetrating into the pipe system connected downstream of the pressure
regulator, as a disturbance in the process associated with the gas application would otherwise be
caused. This is prevented by purging with process gas or purge gas.
2. Before opening a gas supply system operated with toxic or corrosive gases on the side of the
surrounding atmosphere, it must be ensured that these gases cannot escape into the environment,
as there is otherwise a risk of injury to personnel or damage to property. The purging process also
prevents this undesirable outcome.
3. Purging fittings used with corrosive gases also extends the service life of the fittings.
The correct procedure for carrying out the purging processes is described in detail for each type of cylinder
pressure regulator in Sections 4.2 to 4.8.
3.3 Technical data
Note!
The technical data can be taken from the Spectron data sheet for the relevant product. If this is
not available, you can view and download it at www.spectron.de.
The maximum inlet and outlet pressures and the gas type are indicated on the type plate.


GES_FE51-52-53SP+FE121SP_1116.docx 11
3. Description
3.4 Connection options
Inlet connection for process gas: Connection nozzle as per order specification and matching the
gas cylinder valve
Outlet, process gas valve (7): 1/4" NPT female thread
Outlet, waste gas valve (8): 1/4" NPT female thread
Outlet, relief valve (4): 1/4" NPT female thread
Inlet connection, purge gas valve (9): 1/4" NPT female thread
Screw fittings can now be screwed into the connection thread while applying opposing force to the valve,
and the pipeline for process gas, waste gas and purge gas connected via these fittings.
3.5 Check valve in the purge gas inlet (9):
To ensure that process gas cannot enter the purge gas line, we recommend the installation of a check
valve (e.g. depending on the gas type, Spectron Part Nos. 71708151 or 71708156 or 71709538) in the inlet
connection of the purge gas valve.
The arrow indicating the flow direction points towards the purge gas valve.
4. Operation
4.1 Labelling
Labelling example
Gas type: NO
FE51-SP3-200-10-DIN 8-NO
P1: 200 bar
P2: 10 bar
Note!
Verification of successful leakage and functional testing is embossed on the reverse side of the
cylinder pressure regulator. The labelling of the cylinder pressure regulator must indicate the gas
type which is to be used! If the gas type is not specified on the type plate, the attached gas-type
adhesive labels must be affixed before the device is put into operation for the first time.
Warning!
The cylinder pressure regulator may only be labelled with the gas type for which it was ordered.


12
4.
4.
2
S
t
1
2
3
4
5
Operati
2
Installi
n
Ca
u
It i
s
val
v
t
ep
A
cti
v
Ma
k


Co
n
To
d
con
n
Co
n




The
be l
e
For
tha
t
In t
h
dis
c
The
W
a
In t
cyli
co
m
reg
It i
s
an
d
If y
o
(se
on
n
g the cyli
n
u
tion!
s
imperativ
e
v
es and th
e
v
ity
k
e sure that

the cyli
n

that the
n
nect the c
y
d
o this, use
n
ection (2).
n
nect the fo
l

proces
s

waste
g

waste
g
(only

purge g
(onl
y
NPT scre
w
e
ft free of
P
oxygen o
r
t
has BAM
h
e case of
g
c
harge and
s
n check all
a
rning!
he case of
nder valve
m
patible wi
t
ulator mod
e
s
also impe
r
d
in accord
a
o
u are uns
u
e the back
n
der pres
s
e
to check t
h
e
gaskets a
r
n
der press
u
connectio
n
y
linder pres
s
an open-e
n
l
lowing line
s
s
gas pipe t
o
g
as line to t
h
g
as line to t
h
on FE51/5
2
as line to t
h
y
on FE51/
5
w
fittings to
b
P
TFE tape.
r
other gas
e
approval.
g
ases with
c
s
ubsequen
t
connection
cylinder pr
e
and the inl
e
t
h the gas t
y
e
l used.
r
ative to en
s
a
nce with t
h
u
re about t
h
of this Ope
s
ure regul
a
h
at the con
n
r
e in perfec
t
u
re regulato
n
of the gas
s
ure regula
t
n
d wrench
o
s
to the pre
o
the outlet
h
e outlet th
r
h
e outlet th
r
2
/53-SP2A
a
h
e inlet th
r
e
5
2/53-SP2
a
b
e inserted
e
s with an
c
ombustibl
e
t
disposal
o
s for leaka
g
e
ssure reg
u
e
t of the cyl
y
pe and sui
s
ure that th
h
e forces a
n
h
e suitabilit
y
r
ating Man
u
a
to
r
n
ection thr
e
t
condition.
r is labelle
d
cylinder v
a
t
or to the s
t
o
f the sam
e
ssure regu
l
thread of t
h
r
ead of the
r
ead of the
and FE51/
5
e
ad of the p
u
a
nd FE51/5
2
here must
oxidation
e
, oxidising,
o
f the wast
e
g
e using su
u
lators, it is
inder pres
s
i
table for th
e
e connecti
o
n
d media u
s
y
of the ac
c
u
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GES_FE51-52-53SP+FE121SP_1116.docx 13
4. Operation
4.3 Putting the cylinder pressure regulator FE51/52/53-SP2A into operation
Step Activity
1 Turn the handwheel (6) anti-clockwise to relieve the regulator spring of the cylinder pressure
regulator and close all valves (7 and 8) attached to the cylinder pressure regulator by turning the
handwheel clockwise.
2 Open the gas cylinder valve for the process gas (1) so that process gas can flow into the pressure
regulator and set the desired outlet pressure for the pressure regulator via its handwheel (6).
3 Now slowly open the process gas valve (7), allowing the process gas to flow into the pipe system
and to the connected equipment
4 Close the gas cylinder valve (1) and open the waste gas valve (8), routing the process gas to the
recycling facility via the connected waste gas line. Close the waste gas valve (8) again
immediately.
5 Close the process gas valve (7).
6 Repeat steps 7 to 10 (pressure purging with process gas) at least 5 times.
7 Open the gas cylinder valve (1) one final time. If necessary, correct the set outlet pressure at the
pressure regulator again by turning the handwheel (6) and then slowly open the process gas valve
(7) to allow the process gas to flow slowly into the downstream pipe system. The cylinder pressure
regulator is now ready for operation.
4.4 Putting the cylinder pressure regulator FE51/52/53-SP2 and FE121-SP into operation
Step Activity
1 Turn the handwheel (6) anti-clockwise to relieve the regulator spring of the cylinder pressure
regulator and close all valves (7 and 9) attached to the cylinder pressure regulator by turning the
handwheel clockwise.
Check that purge gas pressure is available, e.g. by opening the gas cylinder valve on the purge
gas cylinder.
2 Slowly open the purge gas valve (9) so that purge gas flows into the cylinder pressure regulator,
and set the desired outlet pressure for the pressure regulator via its handwheel (6).
3 Now slowly open the process gas valve (7), allowing the purge gas to flow into the pipe system
and to the connected equipment (purging the line as far as the connected equipment).
4 Close the purge gas valve (9) and open a waste gas valve installed near the connected equipment
to route the purge gas to the recycling facility via the connected waste gas line.
Note:
Depending on the structure of the gas supply system, purging can also be carried out through the
connected equipment. In this case, the recommended duration of this type of purging depends on
the individual parameters of the pipe system (pressure, length and diameter) and, of course, also
on the experience of the plant personnel.


14 GES_FE51-52-53SP+FE121SP_1116.docx
4. Operation
5 Close the process gas valve (7).
6 Repeat steps 3 to 5 (so-called pressure purging) at least 5 times.
7 Open the gas cylinder valve for the process gas (1), allowing process gas to flow into the pressure
regulator.
8 If necessary, correct the set outlet pressure at the pressure regulator by turning the handwheel (6)
and then slowly open the process gas valve (7) to allow the process gas to flow slowly into the
downstream pipe system. The cylinder pressure regulator is now ready for operation.
4.5 Putting the cylinder pressure regulator FE51/52/53-SP3 into operation
Step Activity
1 Turn the handwheel (6) anti-clockwise to relieve the regulator spring of the cylinder pressure
regulator and close all valves (7, 8 and 9) attached to the cylinder pressure regulator by turning
the handwheel clockwise. Check that purge gas pressure is available, e.g. by opening the gas
cylinder valve on the purge gas cylinder.
2 Slowly open the purge gas valve (9) so that purge gas can flow into the cylinder pressure
regulator, and set the desired outlet pressure for the cylinder pressure regulator via its
handwheel (6).
3 Now slowly open the process gas valve (7), allowing the purge gas to flow into the pipe system
and to the connected equipment (purging the line as far as the connected equipment).
4 Close the purge gas valve (9) and open the waste gas valve (8), routing the purge gas to the
recycling facility via the connected waste gas line. Close the waste gas valve (8) again
immediately.
5 Close the process gas valve (7).
6 Repeat steps 2 and 5 (pressure purging with purge gas) at least 5 times.
7 Open the gas cylinder valve for the process gas (1) so that process gas can flow into the pressure
regulator.
8 Now slowly open the process gas valve (7), allowing the process gas to flow into the pipe system
and to the connected equipment
9 Close the gas cylinder valve (1) and open the waste gas valve (8), routing the process gas to the
recycling facility via the connected waste gas line. Close the waste gas valve (8) again
immediately.
10 Close the process gas valve (7).
11 Repeat steps 7 to 10 (pressure purging with process gas) at least 5 times.
12 Open the gas cylinder valve (1) one final time. If necessary, correct the set outlet pressure at the
pressure regulator again by turning the handwheel (6) and then slowly open the process gas
valve (7) to allow the process gas to flow slowly into the downstream pipe system. The cylinder
pressure regulator is now ready for operation.

GES_FE51-52-53SP+FE121SP_1116.docx 15
4. Operation
4.6 Changing the cylinder on cylinder pressure regulator FE51/52/53-SP2A
Caution!
Each time you change the cylinder, check that the gasket is in perfect condition and replace it if
necessary.
Step Activity
1 Close the process gas valve (7) of the cylinder pressure regulator and the gas cylinder valve (1)
of the gas cylinder which is to be replaced.
2 Relieve the cylinder pressure regulator via the waste gas valve (8) and check that both pressure
gauges show 0 bar.
3 Relieve the pressure regulator by turning the handwheel (6) anti-clockwise.
4 Disassemble the pressure regulator from the gas cylinder valve and connect the new gas
cylinder.
5 Slowly open the gas cylinder valve (1) and set the desired outlet pressure for the cylinder
pressure regulator via its handwheel (6).
6 Carry out pressure purging of the cylinder pressure regulator with process gas. To do this, close
the gas cylinder valve (1), open the waste gas valve (8) to drain the process gas from the cylinder
pressure regulator and close the waste gas valve again immediately.
7 Repeat steps 7 to 10 (pressure purging with process gas) another 4 times.
8 Open the gas cylinder valve (1) one final time. If necessary, correct the set outlet pressure at the
pressure regulator again by turning the handwheel (6) and then slowly open the process gas
valve (7) to allow the process gas to flow slowly into the downstream pipe system. The cylinder
pressure regulator is now ready for operation.
9 Check the gas cylinder connection (2) and all other detachable connections for leakage.
4.7 Changing the cylinder on cylinder pressure regulator FE51/52/53-SP2 and FE121-SP
Caution!
Each time you change the cylinder, check that the gasket is in perfect condition and replace it if
necessary.
Step Activity
1 Close the gas cylinder valve (1) and the process gas valve (7) and slowly open the purge gas
valve (9) to allow purge gas to flow into the pressure regulator.
2 Open the process gas valve (7) to drain the purge gas from the cylinder pressure regulator again.
Close the process gas valve.
3 Open the purge gas valve (9) again to allow purge gas to flow into the pressure regulator. Then
close the purge gas valve (9) again.
4 Open the process gas valve (7) to drain the purge gas from the cylinder pressure regulator again.
Close the process gas valve (7).

16 GES_FE51-52-53SP+FE121SP_1116.docx
4. Operation
5 Repeat steps 3 and 4 another 4 times.
6 Relieve the cylinder pressure regulator by turning the handwheel (6) anti-clockwise and check that both
pressure gauges show 0 bar.
7 Disassemble the pressure regulator from the gas cylinder valve and connect the new gas cylinder.
8 Proceed as described in steps 2 to 6 of Section 4.4 to put the pressure regulator into operation again.
9 Check the gas cylinder connection (2) and all other detachable connections for leakage.
4.8 Changing the cylinder on cylinder pressure regulator FE51/52/53-SP3
Caution!
Each time you change the cylinder, check that the gasket is in perfect condition and replace it if
necessary.
Step Activity
1 Close the process gas valve (7) of the cylinder pressure regulator and the gas cylinder valve (1) of the gas
cylinder which is to be replaced.
2 Relieve the cylinder pressure regulator via the waste gas valve (8) and close the valve again.
3 Open the purge gas valve (9) to allow purge gas to flow into the pressure regulator. Then close the purge
gas valve (9) again.
4 Relieve the cylinder pressure regulator via the waste gas valve (8) and close the valve again.
5 Repeat steps 3 and 4 another 4 times.
6 Relieve the cylinder pressure regulator by turning the handwheel (6) anti-clockwise and check that both
pressure gauges show 0 bar.
7 Disassemble the pressure regulator from the gas cylinder valve and connect the new gas cylinder.
8 Slowly open the purge gas valve (9) so that purge gas flows into the cylinder pressure regulator, and set
the desired outlet pressure for the cylinder pressure regulator via its handwheel (6). Then close the purge
gas valve (9) again.
9 Open the waste gas valve (8) to drain the purge gas from the cylinder pressure regulator again. Then close
the waste gas valve (8) again.
10 Repeat steps 8 and 9 another 4 times.
11 Slowly open the gas cylinder valve (1) and if necessary, correct the desired outlet pressure for the cylinder
pressure regulator via its handwheel (6). Now close the gas cylinder valve (1) again.
12 Open the waste gas valve (8) to drain the process gas from the cylinder pressure regulator again. Then
close the waste gas valve (8) again.
13 Repeat steps 11 and 12 another 4 times.
14 Now slowly open the gas cylinder valve (1) again, then also slowly open the process gas valve, allowing the
process gas to flow into the downstream pipe system, and check that all detachable connections are gas-
tight.

GES_FE51-52-53SP+FE121SP_1116.docx 17
4. Operation
4.9 Taking out of operation
Taking out of operation or interrupting operation for a short period
If you are only interrupting work for a very brief period, it is sufficient to merely close the gas cylinder valve.
Taking out of operation or interrupting operation for a longer period
Carry out the steps described for your cylinder pressure regulator in the respective section "Changing the
cylinder on cylinder pressure regulator FE …SP…."
However, do not carry out the step in which the pressure regulator is released!
To continue operation after an interruption, carry out the steps listed after the omitted step.
5. Faults
Faults/cause Remedy
Gas is blown off from the relief valve.
Impermissible increase in the outlet
pressure.
Close all valves immediately.
Have the pressure regulator inspected immediately by the
manufacturer or an authorised specialist company.
The pressure regulator is making noises.
This indicates a defect in the regulator
insert.
Close all valves immediately.
Have the pressure regulator inspected immediately by the
manufacturer or an authorised specialist company.
The pressure regulator is frozen.
This indicates that too much gas is being
withdrawn.
Reduce the amount of gas drawn or
– if technically, chemically, physically possible –
install an upstream gas preheater.
There is a leak.
This indicates a defect in a pressure
regulator component.
Close all valves immediately.
Have the pressure regulator inspected immediately by the
manufacturer or an authorised specialist company.
The outlet pressure level is unstable and
is not adhering to the usual range of
variation. This indicates that too much
gas is being withdrawn.
Reduce the amount of gas drawn.
It is also possible that there is dirt in the inlet filter.
In this case, the pressure regulator must be checked by the
manufacturer or an authorised specialist company.

18 GES_FE51-52-53SP+FE121SP_1116.docx
6. Maintenance, cleaning and repairs
6.1 Regular maintenance work and visual inspections
Regular maintenance work
To ensure problem-free and reliable operation,
the pressure regulator should be inspected by an expert once a year.
Regular visual inspections
Visual inspection of all
parts for
Interval
Damage
Correct functioning
Leaks
Integrity/stability
Corrosion
Regular inspections at intervals of 12 months and each time the device is put
into operation make an important contribution to the cost-effectiveness and
preservation of the value of the fittings.
Note!
If you find defects during the visual inspection, do not put the pressure regulator into operation.
Have the pressure regulator inspected immediately by the manufacturer or an authorised
specialist company.
6.2 Regular cleaning
Warning!
Detergents or disinfectants can corrode and ruin gaskets inside the fittings. Do not use cleaning
agents or disinfectants!
Heavy soiling can lead to malfunctions. If it becomes necessary to clean the pressure regulator,
use only a damp, lint-free cloth.
6.3 Repair information
Caution!
Repairs may only be carried out by specialist personnel in authorised repair workshops. After
repairs, the entire pressure regulator must be checked in accordance with the original Spectron
inspection instructions.
Safe and reliable operation can only be guaranteed if original spare parts are used.
Note!
The manufacturer accepts no liability for damage resulting from unauthorised repairs or
modifications carried out by the user or third parties without the express written approval of the
manufacturer.
6.4 Returns
If the pressure regulator is returned to the manufacturer for testing, maintenance or repair, and it has been
in contact with corrosive or toxic gases, it is imperative that it is purged with inert gas.



Spectron Gas Control Systems GmbH
Fritz-Klatte-Straße 8
65933 Frankfurt
Deutschland / Germany
Telephone: [phone]
Fax: [phone]
E-mail: [email protected]
Internet: www.spectron.de