Dungs FRM 100025 ND User manual

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Edition 02.22 • No. 270 442
1 … 68
The target group of this manual is qualied personnel of the
gas safety and regulating technology. Due to their specialist
training, knowledge and experience, they should be capable
of evaluating the work assigned to them and recognising
possible dangers. Only they are permitted to carry out as-
sembly, commissioning, settings and maintenance on the
devices in compliance with the recognised rules for occupa-
tional safety.
Instruction Manual
FRM 100025 - 100050
2. Warnings
Never carry out work as long as gas
pressure or voltage is applied. Avoid
open re. Please observe public regula-
tions.
The device must be protected from vi-
brations and mechanical impacts.
All adjustments and settings should only
be performed in accordance with the
instruction manuals of the connected
machines.
The recognised occupational safety
rules and accident prevention regula-
tions must be observed and, if neces-
sary, personal protective measures must
be taken.
Connected line systems must be free
from dirt and contamination.
Hang this instruction manual in a readily visible place
inside the installation room! Do not carry out any work
until you have read the safety instructions of this in-
struction manual and are qualied to do so.
The device may only be operated in
compliance with the operating condi-
tions stated on the type plate.
Prior to assembly, the device must be
inspected for transport damage.
The device must not be used in areas
with increased seismic risk.
Protection from environmental impacts
and weather conditions (corrosion, rain,
snow, icing, humidity (e.g. by conden-
sation), mould, UV radiation, harmful
insects, poisonous, corrosive solutions/
liquids (e.g. cutting and cooling uids),
must be guaranteed. Depending on the
installation site, it may be necessary to
take protective measures.
The device must not be exposed to open
re. Protection against lightning strikes
must be guaranteed.
2.1 General warnings
1. Target group
Explanation of the symbols
1, 2, 3,... = Order of
action
• = Instruction

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Edition 02.22 • No. 270 442
2.2 Designated use
The device is used in accordance with its designated use if
the following instructions are observed:
• Use of the device in gas transport and gas distribution
networks, commercial and industrial plants.
• Use in pressure regulator stations according to EN
12186 and EN 12279 or for use in gas piping systems
according to NFPA 54 or CSA B149.1 or for use in gas
trains according to NFPA 86, NFPA 37, NFPA 85 or CSA
B149.3.
• Use with gases of the 1st, 2nd and 3rd gas families accord-
ing to EN 437 only (e.g. manufactured gas (town gas),
2.3 Risks in case of misuse
• If used in accordance with their designated use, the
devices are safe to operate.
• Non-observance of the regulations may result in per-
sonal injury or material damage, nancial damage or
environmental damage.
3. Approval / EU declaration of conformity
• Operator errors or misuse present risks to life and limb
of the operators and also to the device and other mate-
rial property.
commercial grade natural gas and commercial grade
LPG gases in the vaporized phase).
• Use with dry and clean gases only, no aggressive me-
dia.
• Use only in compliance with the operating conditions
stated on the type plate.
• Use in perfect condition only.
• Malfunctions and faults must be eliminated immediately.
• Use only in observance of the instructions given in this
instruction manual and of national regulations.

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3 … 68
EU Declaration of conformity
Produkt / Product
Produit / Producto FRM 100025 - 100050
FRM 250025 - 250050 Medium Pressure Regulator 10 bar / 25 bar
Hersteller / Manufacturer
Fabricant / El fabricante Karl Dungs GmbH & Co. KG
Karl-Dungs-Platz 1
73660 Urbach, Germany
bescheinigt hiermit, dass die
in dieser Übersicht genannten
Produkte einer EU-Baumuster-
prüfung (Baumuster) unterzo-
gen wurden und die wesentlichen
Sicherheitsanforderungen der:
• EU-Druckgeräterichtlinie
2014/68/EU
in der gültigen Fassung erfüllen.
Alle nach Druckgeräterichtlinie
zugelassenen Komponenten sind
Ausrüstungsteile mit Sicherheits-
funktion.
Bei einer von uns nicht freige-
gebenen Änderung des Gerätes
verliert diese Erklärung ihre
Gültigkeit.
Der oben beschriebene Gegen-
stand der Erklärung entspricht
den einschlägigen Harmoni-
sierungsrechtsvorschriften der
Union.
Die alleinige Verantwortung für
die Ausstellung dieser Konformi-
tätserklärung trägt der Hersteller.
certies herewith that the pro-
ducts named in this overview
were subjected to an EU-Type
Examination (production type)
and meet the essential safety
requirements:
• EU-Pressure Equipment
Directive "2014/68/EU"
as amended.
All of the components certied
according to the Pressure Equi-
pment Directive are equipment
parts with safety function.
In the event of an alteration of the
equipment not approved by us
this declaration loses its validity.
The object of the declaration
described above conforms with
the relevant Union harmonisation
legislation.
This declaration of conformity is
issued under the sole responsi-
bility of the manufacturer.
certie par la présente que le
produit mentionné dans cette vue
d'ensemble a été soumis à un
examen UE de type (type de
fabrication) et qu'il est conforme
aux exigences en matières de
sécurité des dernières versions
en vigueur de :
• Directive européenne
relative aux appareils sous
pression 2014/68/UE
Tous les composants homo-
logués conformément à la
directive sur les dispositifs sous
pression sont des éléments
d'équipement à fonction de
sécurité.
Ce communiqué n'est plus
valable si nous eectuons une
modication libre de l'appareil.
L'objet décrit ci-dessus de la pré-
sente déclaration correspond aux
prescriptions légales applicables en
matière d'harmonisation de l'Union.
Le fabricant porte l'entière res-
ponsabilité pour l'établissement
de la présente déclaration de
conformité.
certica que los productos men-
cionados en este resumen han
sido sometidos a un examen UE
de tipo (tipo de producción) y
cumplen con los requisitos mínimos
de seguridad de:
• Directiva de equipos a
presión de la UE
2014/68/EU
en su versión vigente.
Todos los componentes autorizados
por la directiva de equipos a presión
son con componentes con función
de seguridad.
En caso de una modicación no
autorizada por nosotros, esta de-
claración pierde su validez.
El objeto de la declaración des-
crita anteriormente es conforme
a la legislación de armonización
pertinente de la Unión.
El fabricante es el único respon-
sable de la expedición de esta
declaración de conformidad.
Prüfgrundlage der EU-Baumusterprüfung (Baumuster)
Specied requirements of the EU-Type Examination (production type)
Base d‘essai de l‘examen UE de type (type de fabrication)
Requisitos especícos del examen UE de tipo (tipo de producción)
DIN EN 334 (01.11.2019)
DIN EN 14382 (01.11.2019)
Gültigkeitsdauer/Bescheinigung
Term of validity/attestation
Validité/certicat
Periodo de validez / Certicado
2024-09-12
CE-0085CP0256
Notizierte Stelle (EU Baumusterprüfung: Modul B)
Notied Body (EU type-examination: Module B)
Organisme notié (Examen de type de l‘UE: module B)
Organismo noticado (Examen tipo UE: Módulo B)
DVGW CERT GmbH
Josef-Wirmer-Straße 1-3
D-53123 Bonn, Germany
Notied Body number: 0085
Überwachung des QM-Systems (Modul D)
Monitoring of the QM system (module D)
Contrôle de la gestion de l‘assurance qualité (module D)
Supervisión del sistema de calidad y seguridad (modulo D)
TÜV SÜD Industrie Service GmbH
Westendstraße 199
D-80686 München, Germany
Notied Body number: 0036
B. Sc., MBA, Simon P. Dungs
Geschäftsführer / Chief Operating Ocer
Directeur / Gerente
Urbach, 2022-02-01

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4. Table of contents
1. Target group 1
2. Warnings 1
2.1 General warnings 1
2.2 Designated use 2
2.3 Risks in case of misuse 2
3. Approval/EU Declaration of conformity 2
4. Table of contents 4
5. List of abbreviations 5
6. Features 6
6.1 Technical data 6
6.2 Nomenclature 7
6.3 Adjustment range 8
6.4 Accuracy class / lock-up pressure class 9
6.5 Selection of regulator springs 10
6.6 Selection of SAV springs 11
6.7 Type plate 12
7. Function 13
8. Dimensions 14
9. Installation 16
9.1 General information 16
9.2 Installation instructions 17
9.3 Vent Lines (only U.S.A and Canada) 18
9.4 Torque 19
10. Safety Shut o Valve (SAV and ASE) 20
10.1 Function 20
10.2 Mounting an ASE to FRM type regulator 21
11. Settings 22
11.1 Regulator setting 22
11.2 SAV setting 23
11.3 Calculation example of set values 24
11.4 Replacement of regulator springs 25
11.5 Replacement of SAV springs 27
11.5.1 Spring exchange Wdso 27
11.5.2 Spring exchange Wdsu 28
12. Commissioning, decommissioning and recommissioning FRM or SAV 30
12.1 General information 30
12.2 Initial Pressurization of FRM 30
12.3 Leakage test 30
12.4 SAV Resetting and Setting of SAV/FRM 31
12.5 Recommissioning 33
12.6 Decommissioning 33
13. Faults and their causes 33
14. Maintenance 35
14.1 General information 35
14.2 Maintenance instructions of the regulator 37
14.2.1 Preparation 37
14.2.2 Replacement of the working diaphragm 37
14.2.3 Replacement of the control plate / valve seat 41
14.3 Maintenance instructions of the SAV 47
14.3.1 Preparation 47
14.3.2 Removing the ASE (SAV mechanism only) from the housing 48
14.3.3 Check / replacement of the working diaphragm, MD/HD version 49
14.4 Necessary tools 49
14.5 SAV Leakage test 50
14.6 Recommended maintenance intervals for SAV and FRM 50
15. Spare parts 51
15.1 List of spare parts of the regulator 52
15.2 List of spare parts of the SAV 53
15.3 Complete regulator sets 54
15.4 Accessories 55
15.5 Storage conditions 56
16. Flow volume tables 56
16.1 Natural gas ow volume table 57
16.2 Air ow volume tables 64
16.3 Valve ow volume coecient KG 67

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5. List of abbreviations
Abbreviation Description
AGo
Response pressure group of the overpressure shut-o (OPSO)
AGu Response pressure group of the underpressure shut-o (UPSO)
AC Accuracy class
ASE
Safety shuto valve (SAV) without housing (as spare part)
KGFlow volume coecient for natural gas
DN Nominal diameter
Fail-open If the main diaphram or the auxiliary pressure required for the actuation of the main valve fails, the main
valve moves automatically to the open position.
IS Type: integral strength range (max. casing pressure)
Maximum rated operating pressure for both, body and upper housing
DS Type: dierential strength range
Class A Functional class: in case the membrane is damaged or in the event of a breakdown of the impulse line pres-
sure the SAV closes
MOP Maximum admissible operating pressure
pdOutlet pressure
pd, abs. Output pressure as absolute pressure
puInlet pressure
pu, abs. Inlet pressure as absolute pressure
pdo Overpressure shut-o (OPSO)
pdu Underpressure shut-o (UPSO)
pmax Maximum operating pressure
PN Nominal pressure rating of the ange
PS Maximum admissible pressure
SAV Safety shuto valve / Slam-shut valve (same as ASE but with housing)
SBV Safety relief valve
SG Lock-up pressure class
SN Serial number
SZ Lock up pressure zone group
Tp. Operating temperature -20 °C ... +60 °C
Wds Specic guide range
Wdo Adjustment range for the overpressure shut-o (OPSO) through regulation of the
available adjusting springs
Wdu Adjustment range for the underpressure shut-o (UPSO) through regulation of the
available adjusting springs
Wdso Specic adjustment range of the adjusting spring installed for the over pressure shut-o (OPSO)
Wdsu Specic adjustment range of the adjusting spring installed for the under pressure shut-o (UPSO)

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6. Features
6.1. Technical data
Technical data FRM …
Device Spring-loaded medium pressure regulator according to EN 334
Type IS
(FRM 100...) / DS (FRM 250...)
Type of gas Family 1+2+3 (e.g. manufactured gas (town gas), commercial grade natural gas
and commercial grade LPG gases in the vaporized phase).
Nominal diameters
Flange
Connecting anges PN 25 according to EN 1092-1 or ANSI Class 150 per B16.5
DN 25 40 50
NPS 1" 1.5" 2"
Admissible pressure load FRM 250... 25 bar (2 500 kPa / 360 PSI )* / FRM 100... 10 bar (1 000 kPa / 145 PSI)
Max. inlet pressure FRM 250... 25 bar (2 500 kPa / 360 PSI )* / FRM 100... 10 bar (1 000 kPa / 145 PSI)
Outlet pressure range 30 - 4 000 mbar (3 - 400 kPa) / 12 to 1 600 "W.C. (0.4 - 58 PSI)
Minimum inlet pressure for
ND versions
200 mbar (20 kPa) / 80 "W..C (2.9 PSI)
Minimum inlet pressure for
MD version
300 mbar (30 kPa) / 120 "W.C. (4.3 PSI)
Minimum inlet pressure for
HD versions
750 mbar (75 kPa) / 301 "W.C. (10.9 PSI)
Minimum inlet pressure for
UHD versions
1 500 mbar ( 150 kPa) / 600 "W.C. (21 PSI)
Materials
Main body housing: cast iron GJS 400-15
(GJS 400-18 LT ductible iron on request)
Diaphragm housing: steel
Diaphragms: NBR
Ambient temperature -20 °C to + 60 °C / -4 °F to + 140 °F
Technical data SAV …
Device Safety shuto valve / slam-shut valve in compliance with EN14382, class A
Type IS
(FRM 100...) / DS (FRM 250...)
Response time ≤ 2s
Adjustment range
below Wdu
10 - 3 000 mbar (1 - 300 kPa) / 4 - 1 200 "W.C. (0.15 - 43 PSI)
Adjustment range
above Wdo
40 - 5 000 mbar (4 - 500 kPa) / 16 - 2 005 "W.C. (0.6 - 72 PSI)
Materials
Main body housing: cast iron GJS 400-15 (GJS 400-18 LT on request)
Diaphragm housing: Aluminium
Diaphragms: NBR
*19 bar (1 900 kPa / 275 PSI) with ANSI 150 anges

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6.2 Nomenclature
Example
FRM 100025 ND / SAV ND
FRM 100 025 ND SAV ND
Type Spring-loaded medium pressure regulator
Maximum operating pressure
MOP
100 … 10 000 mbar (100 kPa)
4 018 "W.C (145 PSI)
250... 25 000 mbar (250 kPa)
2 500 "W.C. (360 PSI)
Nominal diameter 025 DN 25 (1")
040 DN 40 (1")
050 DN 50 (2")
Pressure range, outlet pressure ND Low pressure
MD Medium pressure
HD High pressure
UHD Ultra high pressure
Safety device SAV Integrated safety shuto valve
Pressure range, trip pressure ND Low pressure
MD Medium pressure
HD High pressure
UHD Ultra high pressure
Flange type
ANSI
with standard PN-25
with ANSI Class 150

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6.3 Adjustment range
Type Connec-
tion
Ver-
sion
Accuracy
class* [AC]
Lock-up
pressure
class* [SG]
Outlet pressure
range Wd
Lower tripping point SAV Upper tripping point SAV
Wdu AG Wdo AG
FRM 100025 ND DN 25 ND AC 10 SG 20 30 - 100 mbar
12 - 40 "W.C.
FRM 100025 MD DN 25 MD AC 5/10** SG 10/20** 90 - 420 mbar
36 - 168 "W.C.
FRM 100025 HD DN 25 HD AC 5 SG 10 400 - 1 500 mbar
160 - 602 "W.C.
FRM 250025 UHD DN 25 UHD AC 5 SG 10 1 000 - 4000 mbar
400 - 1 600 "W.C.
FRM 100025 ND / SAV ND DN 25 ND AC 10 SG 20 30-100 mbar
12 - 40 "W.C.
10 - 115 mbar
4 - 46 "W.C. AG 10 40 - 240 mbar 16 - 96 "W.C. AG 10
FRM 100025 MD / SAV MD DN 25 MD AC 5/10** SG 10/20** 90 - 420 mbar
36 - 168 "W.C.
35 - 400 mbar
12 - 160 "W.C. AG 10 180 - 800 mbar 72 - 321 "W.C. AG 10
FRM 100025 HD / SAV HD DN 25 HD AC 5 SG 10 400 - 1 500 mbar
160 - 602 "W.C.
150 - 1 400 mbar
60 - 562 "W.C. AG 5 500 - 3 500 mbar 200 - 1 406 "W.C. AG 5
FRM 250025 UHD / SAV UHD DN 25 UHD AC 10 SG 10 1 000 - 4000 mbar
400 - 1 600 "W.C.
150 - 3 000 mbar
60 - 1 200 “W.C. AG 5 1 300 - 5 000 mbar 522 - 2 005 “W.C. AG 5
FRM 100040 ND DN 40 ND AC 10 SG 20 30 - 100 mbar
12 - 40 "W.C.
FRM 100040 MD DN 40 MD AC 5/10** SG 10/20** 90 - 420 mbar
36 - 168 "W.C.
FRM 100040 HD DN 40 HD AC 5 SG 10 400 - 1 500 mbar
160 - 602 "W.C.
FRM 250040 UHD DN 40 UHD AC 5 SG 10 1 000 - 4000 mbar
400 - 1 600 "W.C.
FRM 100040 ND / SAV ND DN 40 ND AC 10 SG 20 30 - 100 mbar
12 - 40 "W.C.
10 - 115 mbar
4 - 46 "W.C. AG 10 40 - 240 mbar 16 - 96 "W.C. AG 10
FRM 100040 MD / SAV MD DN 40 MD AC 5/10** SG 10/20** 90 - 420 mbar
36 - 168 "W.C
35 - 400 mbar
14 - 160 W.C. AG 10 180 - 800 mbar 72 - 321 "W.C. AG 10
FRM 100040 HD / SAV HD DN 40 HD AC 5 SG 10 400 - 1 500 mbar
160 - 602 "W.C.
150 - 1 400 mbar
60 - 562 W.C. AG 5 500 - 3 500 mbar 200 - 1406 "W.C. AG 5
FRM 250040 UHD / SAV UHD DN 40 UHD AC 10 SG 10 1 000 - 4000 mbar
400 - 1 600 "W.C.
150 - 3 000 mbar
60 - 1 200 “W.C. AG 5 1 300 - 5 000 mbar 522 - 2 005 “W.C. AG 5
FRM 100050 ND DN 50 ND AC 10 SG 20 30 - 100 mbar
12 - 40 "W.C.
FRM 100050 MD DN 50 MD AC 5/10** SG 10/20** 90 - 420 mbar
36 - 168 "W.C.
FRM 100050 HD DN 50 HD AC 5 SG 10 400 - 1 500 mbar
160 - 602 "W.C.
FRM 250050 UHD DN 50 UHD AC 5 SG 10 1 000 - 4000 mbar
400 - 1 600 "W.C.
FRM 100050 ND / SAV ND DN 50 ND AC 10 SG 20 30 - 100 mbar
12 - 40 "W.C.
10 - 115 mbar
4 - 46 "W.C. AG 10 40 - 240 mbar 16 - 96 "W.C. AG 10
FRM 100050 MD / SAV MD DN 50 MD AC 5/10** SG 10/20** 90 - 420 mbar
36 - 168 "W.C.
35 - 400 mbar
12 - 160 “W.C. AG 10 180 - 800 mbar 72 - 321 "W.C. AG 10
FRM 100050 HD / SAV HD DN 50 HD AC 5 SG 10 400 - 1 500 mbar
160 - 602 "W.C.
150 - 1 400 mbar
60 - 562 "W.C. AG 5 500 - 3 500 mbar 200 - 1 406 "W.C. AG 5
FRM 250050 UHD / SAV UHD DN 50 UHD AC 10 SG 10 1 000 - 4000 mbar
400 - 1 600 "W.C.
150 - 3 000 mbar
60 - 1 200 “W.C. AG 5 1 300 - 5 000 mbar 522 - 2 005 “W.C. AG 5
*Accuracy class / lock-up pressure class according to EN 334
**pd = 90 - 180 mbar / 36 - 72 "W.C.: AC 10, SG 20
pd= 180 - 420 mbar / 72 - 168 "W.C.: AC 5, SG 10

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6.4 Accuracy class / lock-up pressure class
Version Outlet pressure range Accuracy class [AC] Lock-up pressure
FRM...ND 30 - 50 mbar / 12 - 20 "W.C. AC 15
pd + 15 mbar / 6 "W.C.
50 - 80 mbar / 20 - 32 "W.C AC 10
90 - 100 mbar / 36 - 40 "W.C. AC 5
FRM...MD 90 - 120 mbar / 36 - 48 "W.C. AC 15
pd + 25 mbar / 10 "W.C
120 - 180 mbar / 48 - 72 "W.C. AC 10
180 - 420 mbar / 72 - 168 "W.C. AC 5
FRM...HD 400 - 450 mbar / 160 - 180 "W.C. AC 10
pd + 50 mbar / 20 "W.C.
450 - 500 mbar / 180 - 200 "W.C. AC 5
500 - 1 500 mbar / 200 - 602 "W.C. AC 2.5
FRM...UHD 1 000 - 4 000 mbar / 400 - 1 600 "W.C. AC 5 pd + 50 mbar / 20 "W.C.
The AC and SG data, in compliance with EN 334, do not
make any statement about the modulation range. Knowl-
edge of the minimum and maximum volume ow is essen-
tial for the application in the eld. Therefore, the accuracy
values 'control quality' and 'lock-up pressure class' that
can be guaranteed at a volume ow of 1:10 were deter-
Abbrevia-
tion
Description
AC Accuracy class
pdOutlet pressure
pu1/2 Inlet pressure
pds Set nominal value of the outlet pressure
SG Lock-up pressure class
Qmin / pu1/2 AC minimum ow volume at a specic inlet pressure pu (lower limit of the volume ow at which the stable
operating conditions for a given nominal value within the given operating temperature range).
Qmax / pu1/2 AC maximum ow volume at a specic inlet pressure pu (upper limit of the volume ow at which a given ac-
curacy class for a given nominal value within the given operating temperature range).
mined. The AC values of the table mentioned above refer
to the maximum admissible percentage deviation of the
outlet pressure from the set nominal value, at which
Qmax / Qmin ≥ 10 is observed.
pd
Qmin, pu1
Q
pu1
Qmin, pu2 Qmax, pu1 Qmax, pu2
pu2
pds
pds x (1-AC/100)
pds x (1+SG/100)
pds x (1+AC/100)

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Edition 02.22 • No. 270 442
Adjustment range, outlet pressure Wdu
Spring
colour
Order
number
Wire ∅
[mm]
Length
[mm]
∅
[mm]
Setpoint range
ND MD HD UHD
Silver 270341 5.5 300 60 30 - 40 mbar
12 - 16 "W.C.
90 - 110 mbar
36 - 44 "W.C.
Green 270345 6.5 280 62.5 40 - 55 mbar
16 - 22 "W.C.
110 - 170 mbar
44 - 68 "W.C.
Yellow 270346 7.0 300 63 55 - 80 mbar
22 - 32 "W.C.
170 - 240 mbar
68 - 98 "W.C.
Blue 270347 8.0 300 65 80 - 100 mbar
32 - 40 "W.C.
240 - 330 mbar
96 - 132 "W.C.
Black 270348 9.0 300 68 330 - 420 mbar
132 - 168 "W.C.
400 - 580 mbar
160 - 233 "W.C.
Purple 270349 10.0 300 69 560 - 850 mbar
225 - 341 "W.C.
Orange 270350 11.0 300 71 800 - 1 200 mbar
321 - 482 "W.C.
1 000 - 1 600 mbar
402 - 652 "W.C.
Pink 270352 12.0 300 73 1 100 - 1 500 mbar
442 - 602 "W.C.
White 271113 13.0 300 75 1 500 - 2 500 mbar
603 - 1 004 "W.C.
Red 271132 14.0 300 77
1 900 - 3 300 mbar
763 - 1 325 "W.C.
Red/
Brown 276127 14.0/8.0 300 77/46
2 900 - 4 000 mbar
1 164 - 1 608 "W.C.
6.5 Selection of regulator springs

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Edition 02.22 • No. 270 442
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Specic adjustment range, underpressure Wdsu
Spring
colour
Order
number
Wire ∅
[mm]
Length
[mm]
∅
[mm]
Setpoint range
ND MD HD UHD
White 270353 1.2 60 10.0 10 - 32 mbar
4 - 12 "W.C.
Yellow 270355 1.5 55 12.3 24 - 40 mbar
9 - 16 "W.C.
Blue 270356 2.0 55 12.3 30 - 115 mbar
12 - 46 "W.C.
35 - 110 mbar
14 - 44 "W.C.
Black 270357 2.3 55 12.3 50 - 250 mbar
20 - 100 "W.C.
Purple 270358 2.5 55 12.3 80 - 400 mbar
32 - 160 "W.C.
150 - 500 mbar
60 - 200 "W.C.
150 - 500 mbar
62 - 101 "W.C.
Orange 270359 3.2 55 15.0 300 - 1 000 mbar
120 - 401 "W.C.
300 - 1 000 mbar
121 - 402 "W.C.
Silver 270360 3.0 60 15.0 800 - 1 400 mbar
321 - 563 "W.C.
800 - 1 400 mbar
321 - 563 "W.C.
Pink 276126 3.5 60 15.0 1 200 - 3 000 mbar
482 - 1 205 "W.C.
6.6 Selection of SAV springs
Specic adjustment range, overpressure Wdso
Spring
colour
Order
number
Wire ∅
[mm]
Length
[mm]
∅
[mm]
Setpoint range
ND MD HD UHD
Silver 270361 2.2 60 30.0 40 - 130 mbar
16 - 52 "W.C.
Green 270366 2.5 60 30.0 60 - 190 mbar
24 - 76 "W.C.
180 - 290 mbar
72 - 116 "W.C.
Red 270367 2.7 60 30.0 90 - 240 mbar
36 - 98 "W.C.
230 - 370 mbar
92 - 148 "W.C.
Yellow 270368 3.2 60 30.0 300 - 500 mbar
120 - 200 "W.C.
Blue 270369 3.5 60 30.0 400 - 800 mbar
160 - 321 "W.C.
500 - 1 000 mbar
120 - 401 "W.C.
Black 270370 3.7 60 30.0 700 - 1 300 mbar
281 - 522 "W.C.
Purple 270371 4.0 60 30.0 1 000 - 1 800 mbar
401 - 723 "W.C.
Orange 270372 4.5 60 30.0 1 300 - 2 500 mbar
522 - 1 004 "W.C.
1 300 - 2 500 mbar
522 - 1 005 "W.C.
Pink 270373 4.8 60 30.0 1 800 - 3 500 mbar
723 - 1 406 "W.C.
1 800 - 3 500 mbar
723 - 1 407 "W.C.
White 271115 5.0 60 30.0 2 500 - 5 000 mbar
1 005 - 2 009 "W.C.

12 …68
Edition 02.22 • No. 270 442
6.7 Type plate
Regulator
85
53
Abbrevia-
tion
Description
AGoResponse pressure group of the overpressure shut-o (OPSO)
AGuResponse pressure group of the underpressure shut-o (UPSO)
AC Accuracy class
KGFlow volume coecient for natural gas
DN Nominal diameter
Fail-open If the main diaphram or the auxiliary pressure required for the actuation of the main valve fails, the main valve
moves automatically to the open position.
IS Type: integral strength range (max. casing pressure)
DS Type: dierential strength range
Class A Functional class: in case the membrane is damaged or in the event of a breakdown of the impulse line
pressure the SAV closes
pdOutlet pressure
puInlet pressure
PN Nominal pressure of the ange
PS Maximum admissible pressure
SAV Safety shuto valve / slam-shut valve (ASE without housing)
SG Lock-up pressure class
-20T60 Operating temperature -20 °C ... +60 °C / -4 °F to + 140 °F
SN Serial number
Wds Specic guide range
Wdo Adjustment range for the overpressure shut-o (OPSO) through regulation of the
available adjusting springs
Wdu Adjustment range for the underpressure shut-o (UPSO) through regulation of the
available adjusting springs
Wdso Specic adjustment range of the adjusting spring installed for the overpressure shut-o (OPSO)
Wdsu Specic adjustment range of the adjusting spring installed for the underpressure shut-o (UPSO)

12 …68
Edition 02.22 • No. 270 442
13 … 68
7. Function
The pressure regulator’s function is to keep the outlet
pressure constant, independent of changes in the inlet
pressure and/or in the ow volume. In the depressurised
state the regulator is open. The pressure regulator com-
plies with the requirements of EN 334 as gas pressure
regulator.
Main components
A Control plate
B Inlet pressure compensation diaphragm
C Lower diaphragm shell
DLever system
E Impulse connection for the outlet pressure
F Working diaphragm
G Vent connection
H Setpoint spring
Depressurised state
The force of the setpoint spring H acts on the working
diaphragm F. In depressurised state there is no coun-
terforce acting in the lower diaphragm shell C, since no
overpressure is applied in the outlet range. The resulting
upward movement of the working diaphragm causes the
lever system D to be pushed downwards. In this way, the
control plate A is then pulled upwards and lifted from the
seat. The regulator is open.
Steady state
In case of increasing outlet pressure, the force on the
working diaphragm F in the diaphragm shell C increases
also. The working diaphragm F is thus pushed upwards
until the force of the setpoint spring His equal to that of
the outlet pressure. The upward movement of the work-
ing diaphragm F causes the lever system D to be pulled
upwards. In this way, the control plate A is then pushed
downwards and the valve gap is reduced. The ow vol-
ume decreased in this way reduces the outlet pressure
until the set nominal value (outlet pressure) is reached
again and a balance of forces at the working diaphragm F
is established.
If the outlet pressure drops, the force on the working
diaphragm F in the lower diaphragm shell C decreases
also. The working diaphragm F is, thus, pushed down-
wards until the force of the setpoint spring His equal to
that of the outlet pressure. The downward movement of
the working diaphragm F causes the lever system Dto
be pushed downwards. In this way, the control plate A is
then pulled upwards and the valve gap is increased. The
increased ow volume increases the outlet pressure until
the set nominal value (outlet pressure) is reached again
and a balance of forces at the working diaphragm Fis
established.
Inlet pressure compensation
Changes in the inlet pressure have no inuence on the
balance of forces. The inlet pressure is compensated by
the inlet pressure compensation diaphragm B.
The inlet pressure is then transferred in the chamber
above the inlet pressure compensation diaphragm B
through an opening at the control plate A. At the control
plate A, the inlet pressure acts in the opening direction. At
the inlet pressure compensation diaphragm B, opposite
to the control plate, the inlet pressure acts in the clos-
ing direction. The surface of the control plate, on which
the inlet pressure acts from below, has the same size as
the admission pressure compensation diaphragm B, on
which the inlet pressure acts from above. Therefore, both
forces cancel each other. The inlet pressure balance at
the regulator is ensured.
A
B
C
D
F
G
H
E

14 …68
Edition 02.22 • No. 270 442
8. Dimensions
Type Order
number
p max.
[bar/kPa/PSI]
DN Dimensions Weight
[kg]
ABC D E F** G
FRM 100025 ND 270272 10 / 1 000 / 145 25 500 184 57 492 820  "G ⊘ 12 38 (83.8 lbs)
FRM 100025 MD 270273 10 / 1 000 / 145 25 380 184 57 492 820  "G ⊘ 12 32 (70.5 lbs)
FRM 100025 HD 270274 10 / 1 000 / 145 25 380 184 57 502 830  "G ⊘ 12 36 (79.4 lbs)
FRM 250025 UHD 271116 25 / 2 500 / 360 25 380 184 57 502 830  "G ⊘ 12 36 (79.4 lbs)
FRM 100040 ND 270278 10 / 1 000 / 145 40 500 223 69 505 830  "G ⊘ 12 42 (92.6 lbs)
FRM 100040 MD 270279 10 / 1 000 / 145 40 380 223 69 505 830  "G ⊘ 12 36 (79.4 lbs)
FRM 100040 HD 270280 10 / 1 000 / 145 40 380 223 69 515 840  "G ⊘ 12 40 (88.2 lbs)
FRM 250040 UHD 271118 25 / 2 500 / 360 40 380 223 69 515 840  "G ⊘ 12 40 (88.2 lbs)
FRM 100050 ND 270284 10 / 1 000 / 145 50 500 254 80 515 840  "G ⊘ 12 49 (108 lbs)
FRM 100050 MD 270285 10 / 1 000 / 145 50 380 254 80 515 840  "G ⊘ 12 43 (94.8 lbs)
FRM 100050 HD 270286 10 / 1 000 / 145 50 380 254 80 525 850  "G ⊘ 12 47 (103 lbs)
FRM 250050 UHD 271120 25 / 2 500 / 360 50 380 254 80 525 850  "G ⊘ 12 47 (103 lbs)
FRM...
F
A
C
D
E
B
Ermeto screw (commpression) connection 12 L: GE 12 - 
with screw connection M 16 for pipes 12 x 1.5.
* Option only US/CDN
Optional with swagelok tting for " tubing.
G*
** "G to  "NPT adapter p/n 231945

14 …68
Edition 02.22 • No. 270 442
15 … 68
Type Order
number
p max.
[bar/kPa/PSI]
DN Dimensions Weight
[kg]
ABC D E F** G
FRM 100025 ND/SAV ND 270275 10 / 1 000 / 145 25 500 184 232 492 1 070  "G ⊘ 12 40 (88.2 lbs)
FRM 100025 MD/SAV MD 270276 10 / 1 000 / 145 25 380 184 229 492 1070  "G ⊘ 12 34 (75.0 lbs)
FRM 100025 HD/SAV HD 270277 10 / 1 000 / 145 25 380 184 236 502 1 080  "G ⊘ 12 38 (83.8 lbs)
FRM 250025 UHD/SAV UHD 271117 25 / 2 500 / 360 25 380 184 236 502 1 080  "G ⊘ 12 38 (83.8 lbs)
FRM 100040 ND/SAV ND 270281 10 / 1 000 / 145 40 500 223 243 505 1 080  "G ⊘ 12 44 (97.0 lbs)
FRM 100040 MD/SAV MD 270282 10 / 1 000 / 145 40 380 223 239 505 1 080  "G ⊘ 12 38 (83.8 lbs)
FRM 100040 HD/SAV HD 270283 10 / 1 000 / 145 40 380 223 247 515 1 090  "G ⊘ 12 42 (92.6 lbs)
FRM 250040 UHD/SAV UHD 271119 25 / 2 500 / 360 40 380 223 247 515 1 090  "G ⊘ 12 42 (92.6 lbs)
FRM 100050 ND/SAV ND 270287 10 / 1 000 / 145 50 500 254 252 515 1 090  "G ⊘ 12 51 (112.0 lbs)
FRM 100050 MD/SAV MD 270288 10 / 1 000 / 145 50 380 254 248 515 1 090  "G ⊘ 12 45 (99.2 lbs)
FRM 100050 HD/SAV HD 270289 10 / 1 000 / 145 50 380 254 256 525 1 100  "G ⊘ 12 49 (108.0 lbs)
FRM 250050 UHD/SAV UHD 271121 25 / 2 500 / 360 50 380 254 256 525 1 100  "G ⊘ 12 49 (108.0 lbs)
FRM... / SAV
A
C
G*
E
BDIN versions come standard with Parker/Ermeto screw (commpression)
connection 12 L: GE 12 -  with screw connection M 16 for pipes 12 x 1.5.
* Option only US/CDN
Optional with swagelok tting for " p/n 267856 or " tubing p/n 267783.
US versions come standard with swagelok tting for " tubing.
DF
** "G to  "NPT adapter p/n 231945

16 …68
Edition 02.22 • No. 270 442
9. Installation
9.1 General information
• This device can only be installed in
compliance with the rules and stand-
ards applicable and in accordanc
with the local regulations and
authorisantions.
• Install the device in a building or
housing, do not install it outdoors without suitable
protective measures!
• The lifting devices used must be suitable for the
load to be lifted.
• Enough installation space for operation and main-
tenance has to be provided.
• It is recommended to install a lter with a pore size
≤ 50 µm upstream of the regulator.
• The installation must not impair the functioning of
other components.
Check prior to installation!
• Shut-o valves both on the inlet and outlet side are
closed.
• Upstream and downstream piping are free from com-
bustible gas.
• Prevent explosive gas-air mixture: the room atmosphere
must be monitored for gas leakages. For the US and
Canada, piping shall be purged per NFPA 56, NFPA 54
or per B 149.1.
• Ensure electrical continuity with use of suitable bonding
straps. Prevent contact voltage and ignitable ashover.
• The performance data on the type plate corresponds to
the purchase ordering data.
• Flanges on the inlet side and outlet side of the connect-
ing lines are parallel with the FRM anges.
• The sealing surfaces of the ange are undamaged and
clean.
• The maximum inlet pressure of the system is lower than
the maximum admissible pressure of the regulator.
• Protective caps at the connection ange, if any, must be
removed.
• The minimum distances for the setting and changing
springs must be observed.
• The pipeline on the inlet side must be free of water and
dirt.
Note during installation!
• Mounting must be carried out in a tension-free state.
No excessive bending.
• Tighten the screws crosswise.
• Tightening torques must be observed.
• Vent lines and blow-o lines have to be positioned
separately.
• Vent lines and blow-o lines must lead outdoors: gases
must be able to escape to a non-hazardous environ-
ment. See section "vent lines".
• The impulse lines may not be shut o or isolated from
the gas pressure.
• The specied distance between the measuring points of
the impulse lines must be observed.
• The ow direction (arrow) on the housing must be fol-
lowed.

16 …68
Edition 02.22 • No. 270 442
17 … 68
9.2 Installation instructions
• The installation must be carried according to the installa-
tion scheme specied below, unless deviations required
by regulations.
• Install the safety shuto valve in the ow direction (ar-
row/housing).
• Design a straight stablisation section with the equal
diameter.
• Make sure that the impulse tapping at the stablisation
Pos. Designation
1Shuto valve, inlet side (e.g. ball valve or buttery valve)
2Filter
3Welded part
4Pressure gauge, inlet side
5Regulator with integrated SAV
6Stabilisation section
7SBV
8Ball valve
9Pressure gauge, outlet side
10 Test burner
11 Venting ball valve
12 Impulse line, SAV
13 Impulse line, regulator
14 Shuto valve, outlet side (e.g. ball valve or buttery valve)
15 Vent line regulator
16 Vent line SAV
17 Relief line for SBV
section is clean and free from burrs. Distance > 5 x DN
• Maximum ow velocity in the stablisation section:
≤ 30 m/s.
• Use steel pipe impulse lines:
For versions using Ermeto screw connection 12 L:
GE 12 - , use D= 12 x 1.5
For versions using tting p/n 267856, use " tubing
• Avoid accumulation of condensate: install the impulse
lines with a gradient.
12
3
4
5
8
6
79
11
10
12
12
Stabilisation section > 5 x DN
Installation drawing
13
14
15
16
17

18 …68
Edition 02.22 • No. 270 442
9.3 Vent Lines (Only U.S.A and Canada)
In addition to the requirements below, vent lines shall
be installed in accordance with the applicable instal-
lation code (e.g. NFPA 86, NFPA 37, NFPA 54, B149.3,
B1491) and shall terminate to an approved and safe
location.
Requirements for Vent line Installation
• Keep elbows to an absolute minimum, and when a
90 deg needs to be made, do as follows:
• If using rigid pipe, use long radius elbows (not short).
Long radius elbows have a bending radius of
1.5 times the pipe diameter. Short elbows have a
bending radius of 1 times the pipe diameter.
• If using tubing and permitted by code, use a minimum
bending radius of 2 x the vent line outside diameter.
• Do not reduce along the entire run of the vent line the
pipe size that is established at the regulator’s threaded
vent connection.
• Do not apply a bending moment on the vent line, if rigid
pipe is used. This can apply a large bending force (a se-
vere stress) to the vent connection of the regulator and
damage the housing, which will bypass of the vent line.
• Apply proper pipe hangers and supports so that the vent
line does not load or strain due to the regulator vent line
connection due weight of the vent piping or due to a
bending moment at the vent connection.
Manifolding of vent lines
• Do not manifold the FRM vent with the SAV vent or a
relief valve vent.
• Do not manifold the SAV vent with a relief valve vent.
• Do not manifold other vents of similar devices (regula-
tor to regulator, relief valve to relief valve, etc), unless
permitted by and manifolded in accordance with the
applicable installation code.
Requirements for Vent Line Length and Size for
FRM and SAV vents
• The diameter of vent line shall be the same size at the
vent connection.
• The vent line from the SAV vent connection to the point
of termination shall be the same size.
• The vent line from the FRM vent connection to the point
of termination shall be the same size if
1. downstream equipment is an industrial application
covered by NFPA 37, NFPA 85, NFPA 86, or NFPA
87, or
2. a relief valve (or token relief valve) is mounted down-
stream of the FRM.
Otherwise, the following apply:
• Use schedule 40,  " pipe or minimum 15mm OD tub-
ing.
• After a length of 15 ft: schedule 40,  " pipe or minimum
20 mm OD tubing.
• After additional 15 ft, increase pipe to schedule 40,
1 " pipe or minimum 26 mm OD tubing until the point of
termination.
Requirements for the Vent Line’s Point of Termination
• Considerations depending on the gas type:
• For Natural Gas and lighter than air combustible gas-
es, the gas will eventually leave the area of discharge.
• However, for heavier than air combustible or even
non-combustible gases, they could accumulate at the
point of discharge or even accumulate underneath
the point of discharge which can create areas of re-
tained combustible or non-breathable gases. Specic
attention must be taken for such cases.
Mounting position

18 …68
Edition 02.22 • No. 270 442
19 … 68
Mmax.
Tmax. Mmax.
FRM...
9.4 Torque
The device must not be used as lever.
Use adequate tools!
Tighten the screws crosswise!
[Nm]
18
19
ISO 7005-2
DN -- -- -- 25 40 50 65 80 100 125 150
Rp ⅜  11 22 -- -- -- --
Mmax.
[Nm] t 10 s 70 105 225 340 610 110 1600 2400 5000 6000 7600
Tmax.
[Nm] t 10 s 35 50 85 125 200 250 325 400 -- -- --
Max. torque system accessories
M … / G … M 4 M 5 M 6 M 8 M 10 G ⅛ G ¼ G ½ G ¾
Mmax.
[Nm] t 10 s 2.5 Nm 5 Nm 7 Nm 15 Nm 40 Nm 5 Nm 7 Nm 10 Nm 15 Nm
Max. torque anged joint
Stud M 12 x 55
(EN 13611)
M 16 x 65
(DIN 939)
Mmax.
[Nm] t 10 s 30 Nm 60 Nm
• If a vent line runs through a roof, verify that the vent
line terminates above the point where water and snow
accumulation on the roof does not cover or isolate the
termination point from the atmosphere.
• To limit the consequences of rain or debris getting into
the vent, always turn the outlet of the vent down towards
the ground.
• Bug Screens:
• Some bugs are attracted to the smell of the natural/
LP gas odorant and could nest in the vent line, which
could seal the termination point. Install a bug screen
on the termination point to deter insects from nesting
in the line.
• Do not paint the bug screen.
• Points of Discharge
• The vent line must discharge away from where peo-
ple might walk or work, such as pedestrians, roofers
and other maintenance professionals.
• The vent line must discharge away from fresh air
intakes and from windows. See applicable fuel gas
installation code (e.g. CSA B149.1, NFPA 54, or
International Fuel Gas Code) for acceptable clear-
ances.
• The end shall be goose-necked downwards.

20 …68
Edition 02.22 • No. 270 442
10. Safety Shut o Valve (SAV and ASE)
SAV protects downstream ttings or lines against pres-
sures that are too high or too low. As soon as the pre-set
trip pressure falls below or exceeds a limit due to a fault,
the SAV automatically interupts the gas ow. Under normal
operating condition the SAV is open.
If the equipment downstream of the regulator, including
any pipework, cannot safely operate or contain a pressure
equal to the highest supply pressure (inlet to regulator), a
SAV must be installed. The SAV is designed to shut down
the gas supply in the event of a fault condition.
The SAV complies with the requirements of EN 14382 as
safety shuto valve.
Main components
A Valve disc
B Closing spring
C Ball catch / trigger mechanism
D Chamber with the pressure to be monitored
E Working diaphragm
F Push rod
G Setpoint spring for pdo
H Setpoint spring for pdu
I Protective cap
Function
Chamber D is connected to the outlet pressure via
a pulse line.
The pressure to be checked acts on the working dia-
phragm E. The force of the setpoint springs G and H acts
as counterforce.
In case of an unbalance of forces (overpressure or un-
derpressure), the SAV is actuated and the gas supply is
blocked.
A
B
C
D
E
F
GH
I
10.1 Function