MEDENUS R 70-10 Manual

© 02.2019
Operating and Maintenance Instructions
Gas pressure regulator
RSP 254 / RSP 255
Regulator
R 70-10 / R 70-20 / R 70-100
Actuator
AS 254 / AS 255

Subject to technical modifications! Reprint prohibited!
Connection
No. R70-10 R70-20 R70-100 K70-10
1Inlet pressure line Inlet pressure line Inlet pressure line
2Setting pressure line Setting pressure line Setting pressure line
3Bypass line Bypass line Bypass line
4Measurement line Measurement line
Breather line
5Breather line Breather line Breather line
6Measurement line
7
Pneumatischer
Folgesollwert (I/P-
Wandler)
8Breather line
9SSV-Measurement line
10
11 SSV-Switching pressure line
12 SSV-Measurement line
Connections R70 / K70
R70-100 R70-10 R70-20
6.
9.

Breather line
Inlet pressure line
Bypass line
Return line
Setting pressure line
Closing spring Setpoint spring
Actuator
diaphragm
Equalization
diaphragm
Valve plate
SSV measurement line
Breather valveSSV control device
100 cm2 measuring movement
Double-diaphragm system
Measurement line
Regulator R 70-100
SSV
Inlet pressure
Set pressure
Outlet pressure
Atmosphere
Gas pressure regulator RSP 254
with integrated SSV direct-acting
Bypass setting
device
Setpoint
setting
device
Actuator AS 254
1
2
3
4 5
6

Table of contents
1 General Information 6
1.1 Warranty and Liability 6
1.2 Symbols, Notes 7
1.3 Terms, Abbreviations 7
2 Application, Characteristics 8
2.1 Application 8
2.2 Characteristics 8
2.3 Type of model (option) 8
3 Reasonably be foreseeable wrong use 8
4 Safety Instructions 9
4.1 Hazards of Handling the Device 9
4.2 Personnel Requirements 9
4.3 Country-Specific Requirements 9
4.4 Handover of the Operating and Maintenance Instructions 9
4.5 Safety in Operation 10
4.6 What To Do in Case of Danger 10
5 Responsibility of the Operator 10
6 Transport, Storage and Packaging 11
6.1 Transport 11
6.2 Storage 11
6.3 Packaging 11
7 Mounting and Commissioning 12
7.1 Safety Instructions and Preparation 12
7.2 Mounting 13
7.3 Leakage Test (Test for External Leakage) 14
7.4 Initial Commissioning / Recommissioning 15
7.5 Table setpoint spring control device 17
7.6 Table setpoint spring SSV - control unit 18
7.7 Table setpoint spring controller 18
7.8 Decommissioning 19
8 Maintenance 19
8.1 Maintenance Plan 19
8.2 Maintenance Procedure 20
8.3 Table of Screw Tightening Torques MA21
8.4 Lubricants Table 21
9 Troubleshooting 22
9.1 Gas Pressure Regulator 22
9.2 Safety Shut-Off Valve 23
10 Replacement and Disposal 24
11 Spare Parts 25
11.1 Spare Parts Drawing AS 254 DN080 25
11.2 Spare parts drawing fine filter FF 26
11.3 Spare part drawing K-70 26
11.4 Spare parts drawing R-70-10 / R70-20 / R70-100 27
11.5 Parts for maintenance actuator 28
11.6 Parts for maintenance regulator / control unit 30
11.7 Parts for maintenance fine filter FF 30

12 Accessories / Options 33
12.1 Noise reduction 33
12.2 Breathing valve BV 35
12.3 Throttle valve RSD 36
12.4 Signal transmitter / reed contact 37
12.5 Inductive signal transmitter 40
12.6.SSV remote triggering 42
12.7 Fine filter FF 44
13 Tools 46
13.1 Tightening tool SSV 46
Notes 46
Declaration of conformity 50
Contact

6
© 02.2019
1 General Information
The personnel entrusted with installation, operation or maintenance of the gas pressure regulator must
have completely read and understood beforehand the following documents:
• Gas Pressure Regulator RSP 254 / RS 255 Product Information
The product information contains technical data, dimensions and a description of the design and the mode of
operation.
• Gas Pressure Regulator RSP 254 / RS 255 Operating and Maintenance Instructions
This document allows safe and efficient handling of the device and contains information on assembly,
commissioning, maintenance, troubleshooting and repair according to regulations.
It is an integral part of the scope of delivery of the device, must be kept in close proximity of the device and
must be readily accessible to personnel at any time.
The basic requirement of safe operation is compliance with all safety instructions and guidelines specified in
these instructions. Accordingly, the information and instructions must be observed when working on the device
or on the gas line. In addition, the local occupational safety regulations and the general safety regulations for
the application range of the device shall apply.
The figures in these instructions are provided for basic understanding and may differ from the actual design.
The contents in these instructions are protected by copyright. They may be used as part of operating the
device. Any other use and / or reproduction is not permitted without prior authorization by the MEDENUS Gas-
Druckregeltechnik GmbH.
1.1 Warranty and Liability
Claims under warranty or liability for personal injury and material damage are generally void,
if one or several of the following conditions are not observed:
• Work on the device during the warranty period may only be performed in consultation with the manufacturer
• Designated use of the device in accordance with the established conditions of use
• Proper installation, commissioning, operation and maintenance of the device
• Operation of the device with properly installed and functioning safety devices only
• Operating and maintenance instructions of the device or of the system
• Observance of the maintenance instructions
• Properly performed repairs
• Supply lines without defects
• The use of original MEDENUS©spare parts and lubricants listed in these instructions or
• Force majeure
It is generally prohibited
• to perform constructive modifications on the device
• to keep using the device despite the detection of a defect

7© 02.2019
1.2 Symbols, Notes
The instructions contain safety instructions marked with symbols to indicate possible consequences in case of non-
observance:
1.3 Terms, Abbreviations
Terms and abbreviations are explained below:
DANGER
Note
NOTICE
This combination of symbol and signal word indicates a potentially hazardous
situation which may result in light injuries, damage to the device, the breakdown
of the system, and material or environmental damage if not avoided.
This combination of symbol and signal word indicates an imminent hazardous
situation, resulting in death or serious injuries if not avoided.
This signal word highlights useful tips, recommendations and information for
efficient and trouble-free operation.
AC Accuracy class
AGo Upper response pressure
group
AGu Lower response pressure
group
BV Breather valve
HDS High-pressure screw spindle
KGvalue
pdOutlet pressure
pds Setpoint of the
outlet pressure
pdso Upper SSV response pressure
pdsu Lower SSV response pressure
PS Maximum allowable pressure
puInlet pressure
ρn Standard gas density
PdF Pneumatic follow-up setpoint from
I/P converter
Pd100 Outlet pressure R70-100
Pd20Outlet pressure R70-20
Pd20s Outlet pressure R70-10 with
1:2 pressure converter for
follow-up setpoint adjustment
Pd10s Outlet pressure R70-10 with
1:1 follow-up setpoint adjustment
Pd10 Outlet pressure R70-10
QnStandard volumetric flow rate
RSD Throttle valve
RSS Switching valve
SSV Safety shut-off valve
SD Setting device
SG Closing pressure group
At Actuator
tugas Gas inlet temperature
VS Valve seat
wuInlet gas velocity
wdOutlet gas velocity
Wdso Upper adjustment range (SSV)
Wdsu Lower adjustment range (SSV)
Δpwo Min. re-engagement difference
between upper
response pressure and
normal operating pressure
Δpwu Min. re-engagement difference
between lower
response pressure and
normal operating pressure
MOP Maximum operating pressure in a
system
MOPd Maximum operating pressure
upstream of the system
FF micro filter

8
© 02.2019
2 Application, Characteristics
2.1 Application
Gas pressure regulator (GDR), indirect-acting (operating with auxiliary power), for systems acc. to
DVGW - work sheet G 491 (A) and G 600 (A) (TRGI)
Can be used as an equipment component on gas consumption facilities as defined in EC Directive EU/2016/426 (GAR)
Can be used for the gases defined in DVGW - work sheet G 260 / G 262 and neutral non-aggressive gases.
(other gases on request)
2.2 Characteristics
 • Regulatorwithdouble-diaphragmsystem
 • ModelaccordingtoDINEN334/14382
 • Integralpressure-tightmodel(IS)
 • GaspressureregulatorwithorwithoutintegratedSSV
 • Compactandmaintenance-friendlymodulardesign
 • SSVfunctionalclass,optionallyAorBtoDINEN14382
• Open-airmodel*
3 Reasonably be foreseeable wrong use
2.3 Type of model (option)
• OptionallywithmicrofilterFFupstreamoftheregulator
• Optionallywithpneumaticfollow-upsetpointfromI/P converter
• Withbuilt-innoisereduction
• WithSSVmanualrelease
• WithSSVelectromagneticremotereleasewhenpowerisappliedorincaseofpowerfailure
• WithelectricpositionindicatorSSV‚Closed‘viainductiveproximityinitiatororviaReedcontact
• WithBVbreathervalveorRSSswitchingvalve(forSSVreleaseincaseofdiaphragmbreakage)
• CoatingwithepoxyresininRALcolours
• SpecialmodelsuchasWobbecorrection
for burner control
 • Thecontrollersmustnotbeusedforcontrollingliquids.
 • Thecontrollersmustnotbeusedintemperaturerangesoflessthan-20°Cormorethan60°C
 • Theregulatorsmustnotbeusedforpressurerangeshigherthanthepressure„PS“ontheratingplate
is called used.
 • Theregulatorsmayonlybeusedfortheapplicationspecifiedinsection(2.1),inthisoperatingmanual
Gases are used.
Other gases, such as oxygen or hydrogen, must be explicitly mentioned on the nameplate.
Please inform the manufacturer before use.
 • ThecontrollersmustnotbeusedwithoutanupstreamHTBfuseinhigh-temperatureareasbecome
*) CategoriesC1toC5-Iareguaranteedwithoutadditionalcoatings.
For category C5-M, an epoxy resin coating is recommended.
P= burner pressure
constant

9© 02.2019
2 Safety Instructions
National accident prevention regulations and the system operator's safety regulations are not superseded by these
operating and maintenance instructions and must be taken into consideration with priority (in Germany, see, among
others, DVGW Code of Practice G 600, G 459/II, G 491 and G 495).
When performing work on the device, the current general and specific safety regulations must be observed.
The application limits of the device with respect to the medium, operating pressure and operating temperature can be
found on the type plate affixed to the device or on the acceptance test certificate.
Using the device under different operating conditions must be agreed upon in consultation with
MEDENUS Gas-Druckregeltechnik GmbH.
The mechanical components of the device do not have any potential ignition sources of their own nor any hot surfaces and
are thus not within the scope of 2014/34/EU (ATEX). The electronic accessories used comply with the ATEX requirements.
Caution of maintenance! Spring-loaded parts are under tension!
2.1 Hazards of Handling the Device
MEDENUS©devices conform with current standards and directives, the recognized technical rules
and the recognized safety rules.
However, improper use can result in hazards to the user or to third parties. This can also result in damage to the device
or to the system.
This is why the device may only be used:
• in accordance with its designated use
• in perfect condition
• while observing the notes given in these operating and maintenance instructions, and inspection and
maintenance regulations, which apply to the functioning and safety of the overall system.
Malfunctions or faults must be eliminated immediately.
2.2 Personnel Requirements
The device may only be mounted by qualified personnel.
Only authorised personnel in possession of the required qualification is allowed to perform settings or repairs on the
device.
2.3 Country-Specific Requirements
The rules and regulations applicable at the place of use with respect to
• gas lines, installation of the gas system,
• gas supply,
• work on the gas system,
• accident prevention must be observed and complied with.
2.4 Handover of the Operating and Maintenance Instructions
The supplier of the system shall hand over these operating and maintenance instructions to the operator of the system
no later than during commissioning and training
of the operating personnel with the reminder to carefully store these instructions.

10
© 02.2019
4.5 Safety in Operation
The device may only be used when all protective devices on the device or in the system are fully functional.
The device must be inspected by a representative of the manufacturer or by a qualified person for externally visible
damage and for proper functioning at least once a year.
A more frequent inspection may become necessary, depending on the system conditions.
4.6 What To Do in Case of Danger
Information on what is to be done in case of danger and in case of accidents can be found in the respective operator's or
specialist companies' work instructions.
5 Responsibility of the Operator
Operator An operator is a person who operates the device himself for commercial or economic purposes or hands
it over to a third party for use / application and is legally responsible for the safety of the user, personnel
or third parties.
The device is used in the industrial sector. Accordingly, the operator of the device is subject to the legal
obligations concerning occupational safety. In addition to the safety instructions contained in these
instructions, the established maintenance intervals must be observed, taking into account the respective
national standard (alarm and hazard prevention plan).
In particular, the following applies:
• The operator is obliged to perform work on MEDENUS©devices during the warranty period only
after consultation with the manufacturer. Otherwise the claims under warranty will become
void.
• The operator must obtain information on the current occupational safety regulations and
determine additional hazards resulting from the special work conditions at the place of use of
the device in a risk assessment. The operator must implement them in the form of operating
manuals for operating the device.
• During the entire time of use of the device, the operator must check whether the operating
manuals drawn up by him conform to the current state of the regulations and, if necessary,
adapt them.
• The operator must clearly regulate and define the responsibilities for installation, operation,
troubleshooting, maintenance and cleaning.
• The operator must ensure that all persons handling the device have read and understood these
instructions. In addition to that, he must train the personnel at regular intervals and inform it
about the dangers.
• The operator must make available to the personnel the required protective equipment and
oblige them to wear the required protective equipment.
• Moreover, the operator is responsible for the device always being in technically perfect condition.
Therefore, the following applies:
• The operator must make sure that the maintenance intervals described in these instructions
are observed.
• The operator must have all safety devices checked regularly for functioning and completeness.
Operator's
obligations

11 © 02.2019
6 Transport, Storage and Packaging
6.1 Transport
The device is delivered with flange protective caps. They must be removed prior to installation.
Make sure that the device is transported horizontally using suitable lifting gear. The device must be
handled carefully and secured against impact and shock.
In case of transport damage, we will require the following information from the type plate affixed to
the device:
• fabrication number
Note
6.2 Storage
Equipment and spare parts must be stored under the following conditions:
• Do not store outdoors.
• Store in a dry and dust-free location.
• Store on a flat surface.
• Do not expose to aggressive media.
• Do not expose to ozone or ionising radiation.
• Do not store adjacent to direct heat sources.
• Avoid mechanical vibrations.
• Storagetemperature:0to25°C.
• Relative humidity: < 55 %.
Spare parts:
• Components susceptible to corrosion must be provided with a suitable preservative.
• Do not store O-rings and seals for more than 7 years even if stored properly.
• Spare parts must be stored in their original packaging until use.
Storage period for devices:
• Storage of the device for up to one year:
Store the gas pressure regulator in its original packaging and original condition at the time of supply. All
protective caps of the device must remain mounted.
• Storage of the device for more than 1 year (e.g. as a spare device):
Store the device in its original packaging and original condition at the time of supply and check it for damage
once a year. Check the housing surface for dirt, damage and corrosion. If necessary, clean all external parts.
After 7 years, all O-rings and seals must be replaced.
6.3 Packaging
• The individual packaged items have been packaged in view of the transport conditions to be expected.
• The symbols on the packaging must be observed during transport and storage.
• Only environmentally-friendly materials have been used for packaging.
• The packaging is designed for protecting the individual components from transport damage, corrosion and
other damage until mounting. This is why the packaging must not be destroyed and only be removed just prior
to mounting.

12
© 02.2019
7 Mounting and Commissioning
7.1 Safety Instructions and Preparation
Prior to starting work on pressurised components:
• Close all connections to the gas line.
• Depressurise all pressurised components. Also discharge residual energies.
• Defective components that are subject to pressure in operation must be replaced
immediately by a suitable qualified person.
Prior to starting work, ensure sufficient clearance for mounting.
Before installing the device, check whether the performance data (type plate) and the scope of
delivery coincide with the order or the system data, i.e., make sure that the provided devices are
suitable for their intended purpose. In particular, the inlet pressure of the system must be lower than
the maximum allowable pressure of the device.
A direct contact of gas valves and fittings, i.e., the control system, with hardening masonry, concrete
walls or floors is not allowed. Provide suitable supports, working materials and protective equipment.
Take into account the minimum clearances for maintenance as stated in the product information.
Before installing the device in the pipeline, check whether a shut-off device that interrupts the gas
flow supply to the device has been mounted upstream and downstream of the device to be installed.
Prior to commissioning, make sure that all installation work has been carried out and completed
in accordance with the data and information given in these instructions and that no unauthorised
persons stay in the danger zone.
DANGER
Note
Note
DANGER
Preferred installation position

13 © 02.2019
7.2 Mounting
• Remove packaging and protection from the connection flange surfaces.
• Check the device for damage.
• Install the device without twisting the pipeline. Tighten screws crosswise.
Make sure to observe the direction of flow, i.e. the arrow on the housing must point in
the direction of flow. The tightening torques of the flange connections and additional
information is available in the DVGW GAS information issue no. 19 (Flanged Connections
in Gas Installation.
• In all installation positions other than horizontal,
MEDENUS Gas-Druckregeltechnik GmbH must be consulted.
Shown gas pressure regulator RSP 255 with actuator AS 255, regulator R 70-20 with following setpoint,
control unit K 70-10, SAV with breathing valve BV and fine filter FF (photo)
I / P converter
Control device
Note
Note
• A separate installation of the SSV breather line (item 7.07) is recommended.
• All breather lines (items 7.04 / 7.07) must be vented to the outside atmosphere.
• Breather lines (items 7.04 / 7.07) may not be required
if breather valves or safety diaphragms are being used.
• The measuring lines (items 7.05 / 7.08) must be connected in a pipeline section with a steady flow. There must
be no installations that cause flow interference such as shutters, expansions, manifolds, junctions, isolation
valves etc. directly upstream and downstream of the measurement point.
• The measurement location should 10xDN regulator, or 5xDN pipe located behind the controller
• The maximum flow rate at the measuring point must not exceed 20 m/s, depending on the system conditions.
• In certain system circuits, such as gas control systems for gas motors and in gas burners, higher flow rates
than 20 m/s are also possible. Please contact us.
• The measuring line must be connected to the pipeline separately, laterally or at the top for each device 1
actuator (item 7.03), 1 gas pressure regulator (item 7.33); 1 integrated SSV (item 7.06).
• The SSV measuring line (Pos. 7.08) must always be connected to the measuring point in front of the first outlet-
side shut-off valve (item 7.13).
Note
fig. 7.1
measuring
point
measuring
point
7.01
7.02
7.03
7.06 7.07
7.29
7.30
7.33
7.04
7.31
7.32
7.13
7.28
7.05
7.08
7.11
7.12
Fine filter FF
Detail p.16
7.45

14
© 02.2019
U
S
G
a
s
-
D
r
u
c
k
r
e
g
e
l
g
e
r
ä
t
D
E
N
U
S
G
a
s
-
D
r
u
c
k
r
e
g
e
l
g
e
r
ä
t
7.10
7.09
7.10
7.09
For Germany:
According to DVGW Code of Practice G 491, the fully assembled system must be subjected to a leakage test with air or
an inert gas at the installation site, using 1.1 times the maximum operating pressure of the system (MOP).
An exception is the room between the actuator installed in the gas pressure regulator and the first shut-off valve on the
outlet side. This room must be checked using the a test pressure corresponding to the maximum permissible pressure
in the system in case of a malfunction (1.1 MOPd). In this test, all detachable connections must be checked using a
foaming agent.
For other countries:
The relevant national and international standards shall apply.
Procedure
• Close the ball valves upstream of the valves and fittings (item
7.01).
• Close the downstream shut-off devices (item 7.13) (ball valves,
solenoid or pneumatic valve).
• Depressurise the system (item 7.11).
• If there is a SRV (safety relief valve) in the controlled section and
the test pressure is higher than the relief pressure of the SRV (item
7.09), the line upstream of the SRV (item 7.10) must be closed.
• Raise the test pressure always slowly and steadily.
For example: 20 mbar / s
5.3 Leakage Test (Test for External Leakage)
The devices are subjected to a strength and leakage test ex works at MEDENUS Gas-Druckregeltechnik GmbH.
The leakage test in the fully assembled system must be performed prior to commissioning and following maintenance
work.
For the external leakage test in the fully assembled system, the following applies:
While doing so, you must ensure:
Pressure in outlet chamber (item 7.12) ≤Pressure in inlet
chamber (item 7.02)
Pressure build-up always from the inlet side (inlet chamber)
Pressure reduction always from the outlet side (outlet chamber)
It is important to ensure that the inlet pressure Pu is always
greater than the outlet pressure Pd.
• After leakage test:
Open the ball valve in the SRV line (item 7.10) again.
Note
NOTICE
fig. 7.2
fig. 7.2.1

15 © 02.2019
7.17
7.16
7.19
7.18
7.14
7.15
7.14
7.4 Initial Commissioning / Recommissioning
Initial commissioning of the system components shall be carried out by the operator. For commissioning, please refer
to the documents listed under item 1 "General Information" and the system operator's work instruction.
The devices delivered by MEDENUS Gas-Druckregeltechnik GmbH are factory-set to the operating data specified by
thecustomer.ThisdataislistedontheAcceptanceTestCertificate(ATC)*andthetypeplate.
Prior to commissioning of the system, a functional test must be performed on the gas pressure
regulator (GPR), if applicable, and the safety shut-off and safety relief valves.
Procedure (fig. 7.1)
• Close the ball valves upstream of the valves and fittings (item 7.01).
• Close the downstream shut-off devices (item 7.13) (ball valves, solenoid or pneumatic valve).
• Depressurise the system (item 7.11).
• Close venting ball valve (item 7.11).
• Slowly open ball valve upstream of the valves and fittings (item 7.01). (Pressure increase approx. 0.5 bar / s)
If the inlet shut-off device is equipped with a bypass, the latter must be slowly opened for pressure
compensation as step 1. This is followed by slowly opening the inlet shut-off valve. The same is true
of the outlet shut-off valve.
• Check the inner leakage of the SSV (item 7.06) by reading the pressure
gauge installed downstream of the GPR (item 7.12).
• Unscrew the sealing cap (item 7.15) of the safety shut-off valve (SSV).
• Perform pressure compensation via the SSV by pulling at the pull knob (item
7.14) and allowing the SSV to engage. In GPR with bypass ball valve (item
7.28), open the ball valve (item 7.28) while pulling the pull knob (item 7.14)
until the SSV engages to perform pressure compensation.
• A closing pressure corresponding to the set value is established on the GPR.
An SSV with underpressure shut-off can only be engaged if the
pressure at the measuring point exceeds the set value by at least
the re-engagement differential.
• Testing the response pressure of the SSV by slowly increasing or decreasing
the output pressure to response pressure.
• It may be necessary to correct the setpoint values of the response pressures.
This is done by turning the SSV setpoint setting screws (items 7.17 / 7.19) to
the right (pressure increase) or left (pressure decrease) in order to increase/
decrease the setpoint value.
The inner setting screw (item 5.17) sets the underpressure shut-off
level (lower trigger level) and the outer setting screw (item 7.19)
sets the upper trigger level.
• Perform pressure compensation via the SSV again by pulling the pull knob
(item 7.14) and allowing the SSV to engage.
*)AcceptanceTestCertificate(ATC)availableoptionally
Note
Note
Note
Note
fig. 7.3
fig. 7.4

16
© 02.2019
• For the functional test of the GPR, let gas flow via the discharge line venting
to the outside atmosphere and read the set regulating pressure on the outlet
pressure gauge (item 7.12).
• After closing a constant closing pressure within the closing pressure class
can be read on the outlet pressure gauge (item 7.12).
• Slowly open the shut-off valve (item 7.13)
• Screw on the sealing cap (item 7.15) of the safety shut-off valve (SSV) again.
Changing the control range
Switching to the control range of a different setpoint spring can be done for the SSV as
well as for the GPR while the device is pressurised.
Safety shut-off valve
The SSV closes if the overpressure setpoint spring (upper trigger level) is removed from
a pressurised system.
Setting gas pressure regulator:
Unscrew the protective cap (item 7.43) on the R70 and change the outlet pressure (Pd) by turning the setpoint adjuster
(item 7.40). The outlet pressure on the pressure gauge (p.13, item 7.12) Watch outlet pressure side.
Turn clockwise - pressure increase
Turn counterclockwise - pressure reduction
For the exact setting, the gas on the outlet pressure side must flow off easily, otherwise the closing pressure will be
displayed. If the desired output pressure can not be set with the installed spring, it may be necessary to replace the
control springs in the controller (R70).
Change riders (R70)
• Relax the control spring by turning the setpoint adjuster (item 7.40) counterclockwise.
• Remove the cover (item 7.41) of the control unit (R70) (4x M6), paying attention to the
O-ring in the housing.
• Insert suitable setpoint spring (item 7.42) and close the lid again.
• Set the desired outlet pressure (Pd) as described above.
• Screw the protective cap (item 7.43) back on the R70.
7.40
7.41
7.42
7.43
7.33
7.44
7.30
7.45
The discharge line (item 7.31) is used to reduce the setting pressure if necessary
via the outlet pressure line (page 13, item 7.45).
In order to open the actuator (p. 13, item 7.03) as the gas decreases, the control
pressure (pos. 7.33) must be increased.
If the quantity taken off the gas decreases, the actuator (p. 13, item 7.03) must
be closed accordingly. To do this, the controller (item 7.33) reduces the signal
pressure and the excess actuating pressure in the control unit of the actuator
is reduced via the discharge line (item 7.31). The outflow velocity via the outflow
line (item 7.31) can be infinitely adjusted using the outflow regulator (item 7.44).
On delivery, the outflow regulator (item 7.44) is open 4 revolutions, ie 2 mm.
If the outflow velocity is to be increased, the flow restrictor (item 7.44) must
be opened by turning the throttle screw (item 7.45) counterclockwise. If the
outflow speed is to be reduced, the flow restrictor must be closed by turning
the throttle screw clockwise.
7.4.1 Discharge line, Outflow adjuster

17 © 02.2019
7.5 SSV setpoint spring table - Control device direct-acting
Type
(GMB 135)
Upper response pressure Lower response pressure Spring data
wdso
[mbar]
Dpwo
[mbar]
wdsu
[mbar]
Dpwu
[mbar] Spring no. Colour [RAL]
MD
small
ball lock
AS 254:
DN 25 - 100
AS 255:
DN 50 - 80
2 - 8 20 FE 900 1028
8 - 18 20 FE 901 2002
18 - 30 20 FE 902 6010
22 - 35 20 FE 903 5015
31 - 45 20 FE 904 9005
45 - 60 20 FE 905 9010
60 - 85 20 FE 906 4002
35 - 45 30 FD 910 1028
45 - 80 30 FD 911 2002
70 - 120 30 FD 912 6010
100 - 170 30 FD 913 5015
140 - 230 30 FD 914 9005
210 - 370 30 FD 915 9010
370 - 500 30 FD 916 3020
490 - 710 30 FD 917 5010
650 - 1080 30 FD 918 9006
980 - 1500 30 FD 919 4002
MD-R
small
ball lock
AS 254:
DN 25 - 100
AS 255:
DN 50 - 80
35 - 50 20 FE 900 1028
50 - 80 20 FE 901 2002
75 - 110 20 FE 902 6010
90 - 130 20 FE 903 5015
120 - 160 20 FE 904 9005
160 - 210 20 FE 905 9010
220 - 290 20 FE 906 4002
100 - 135 30 FD 910 1028
130 - 250 30 FD 911 2002
220 - 360 30 FD 912 6010
320 - 510 30 FD 913 5015
440 - 700 30 FD 914 9005
630 - 1130 30 FD 915 9010
1100 - 1500 30 FD 916 3020
1450 - 2100 30 FD 917 5010
1850 - 3200 30 FD 918 9006
2800 - 4000 30 FD 919 4002

18
© 02.2019
Type
(GMB 146)
Upper response pressure Lower response pressure Spring data
wdso
[mbar]
Dpwo
[mbar]
wdsu
[mbar]
Dpwu
[mbar] Spring no. Colour [RAL]
MD
large
ball lock
AS 254:
DN 150 - 200
RSP 255:
DN 100
10 - 40 15 FM 400 1028
35 - 115 30 FM 402 6010
60 - 245 60 FM 404 9005
40 - 180 20 FL 412 6010
70 - 340 50 FL 413 5015
330 - 1100 80 FL 415 9010
MD-R
large
ball lock
AS 254:
DN 150 - 200
RSP 255:
DN 100
10 - 180 50 FM 400 1028
155 - 380 100 FM 402 6010
200 - 950 150 FM 404 9005
145 - 670 100 FL 412 6010
270 - 1230 200 FL 413 5015
1200 - 4500 200 FL 415 9010
7.6 SSV setpoint spring table - Control device direct-acting
7.7 Regulator setpoint spring table
PhPneumatic follow-up setpoint from I/P converter (0-6 bar)
Pd100 Outlet pressure R70-100
Pd20Outlet pressure R70-20
Pd20s Outlet pressure R70-10 with follow-up setpoint 1:2
Pd10 Outlet pressure R70-10
Pd10s Outlet pressure R70-10 with follow-up setpoint 1:1
Pd Outlet pressure K70-10
R70-100 R70-20 R70-10 K70-10 Spring data
Pd100 [mbar] Pd20 [mbar] Pd20s [mbar] (1:2) Pd10 [mbar] Pd10s [mbar] (1:1) Pd [mbar] Spring no. Colour [RAL]
0-37 0-180
Pd20s=Pd10+Ph*2 Pd10s=Pd10+Ph
FD 911 2002
30-85 150-400 300-850 FD 912 6010
55-160 250-750 550-1600 FD 913 5015
100-260 550-1250 1000-2600 FD 914 9005
200-460 1000-2250 2000-4600 2000-4600 FD 915 9010
400-620 2000-3000 4000-6200 4000-6200 FD 917 5010
3000-6500 6000-13000 6000-13000 FD 918 9006

19 © 02.2019
8 Maintenance
8.1 Maintenance Plan
The following sections describe the maintenance work required for optimal and trouble-free operation of the device.
If increased wear is detected during regular inspections, the required maintenance intervals must be shortened in
accordance with the actual wear.
For any questions on maintenance work and intervals, please contact the manufacturer.
The intervals for monitoring and maintenance work are strongly dependent on the operating situation and the
condition of the gas. This is why no fixed intervals can be given. For Germany, it is recommended to observe initially the
maintenance periods according to the data given in DVGW Code of Practice G 495. For each system, this must be followed
by determining the maintenance interval independently on a medium-term basis.
During maintenance work, the components must be cleaned and subjected to a thorough visual inspection. This is also
necessary if irregularities in the operating behaviour have been detected during operation or during functional tests.
Damaged parts and O-rings dismounted during dismantling must be replaced with new ones.
The item numbers mentioned in chapter 8.2 (Maintenance Procedure) correspond to those listed in the
spare parts drawings and spare parts lists.
It is recommended to stock the parts listed in chapter 11.6 and 11.7 for maintenance work.
Interval Maintenance activities Personnel
as specified in
DVGW worksheet G
495 or as required
Replacing O-rings
Qualified personReplacing diaphragms
Replacing the valve plate
7.8 Decommissioning
Fordecommissioning,pleaserefertothedocumentslistedunderitem1„GeneralInformation“andthesystemoperator‘s
work instruction.
Procedure (fig. 7.1)
• Slowly close the outlet shut-off valve (item 7.13) and
• Close the ball valves upstream of the valves and fittings (item 7.01).
• Depressurise the system (item 7.11). (Always Depressurise via the outlet side Pu ≥ Pd)
• Close venting ball valve (item 7.11).
Note

20
© 02.2019
8.2 Maintenance Procedure
The maintenance procedure is described in detail step-by-step in our video tutorial and our pictorial descriptions.
Instructions for our products can be found in the download area of our website. Should you have any problems, please
feel free to contact us directly.
If components have been removed, make sure they are mounted correctly, reinstall all fastening
elements and observe the screw tightening torques.
Prior to recommissioning, observe the following:
• Make sure that all maintenance work has been carried out and completed in accordance
with the data and information given in these instructions.
• Make sure that no unauthorised persons stay in the danger zone.
• Make sure that all covers and safety devices have been installed and are working properly.
For recommissioning, please refer to the relevant manufacturer's documentation of the
gas pressure regulator installed in the system or chapter 1 and 5.4 as well as the work instructions of the system
operator, and the other safety regulations for the system in which the regulator is installed.
To guarantee smooth operation, we recommend always keeping a maintenance set in reserve.
NOTICE
DANGER
Note