GasTeh 121 Quick guide

REGULATOR NISKOG PRITISKA BEZ I SA
BLOKADNIM MEHANIZMOM TIP: 121
(blokada od: - visokog pritiska –VP
- visokog i niskog pritiska - VNP)
SAFE USE GUIDE
UPUTSTVO ZA MONTA@U, RUKOVANJE I ODR@AVANJE
LOW GAS PRESSURE REGULATOR WITH OR
WITHOUT INCORPORATED SAFETY SHUT-OFF DEVICE
TYPE: 121
(shut-off device: - for high pressure –VP
- for high and low pressure –VNP)

GT-121-02 1
INTRODUCTION
This Safety use guide provides instructions and safety informations on pressure equipment so as to avoid
any foreseeable risk during the use. For any information refer to regulator type: 121 see Technical manual
(GT-121-01).
UVOD
Uputstvo za rukovanje, montažu i održavanje pruža informacije i instrukcije za bezbedan rad kako bi se
izbegli mogući rizici pri upotrebi. Za ostale informacije vezane za tehničke karakteristike pogledati
Tehnički katalog (GT-121-01).
GENERAL REMARK
Regulators type: 121 and type 121-BV are devices whose function is to maintain the value of the controlled
pressure within its tolerance field irrespective of disturbance pressure.
Regulators type: 121 and type 121-BV are direct acting regulators in which the net force required to move
the control member is supplied by the controlled pressure.
Regulators type: 121 and type: 121-BV are designed and manufactured according to EN 334.
Conformity to Directive 2014/68/EC and CE marking of pressure regulator and relevant accessory requires
installation on system with minimum requirements according to: EN 12186 and EN 12279.
Only accessories produced and labeled by GasTeh can be incorporated to regulators type: 121 and type:
121- BV as additional pressure accessories (e.g. filters, silencers, etc.).
For problems with regulators type: 121 and type 121-BV with incorporated pressure accessories produced
by other manufacturers, GasTeh will not be responsible.
OPŠTE PRIMEDBE
Regulatori pritiska tip:121 i tip:121- BV su uređaji čija je funkcija obezbeđivanje konstantne vrednosti
izlaznog pritiska u okviru regulacione grupe, nezavisno od promene ulaznog pritiska.
Regulatori pritiska tip:121 i tip:121- BV su regulatori direktnog dejstva kod kojih se sila potrebna za
održavanje konstantnog pritiska dobija iz samog pritiska koji se kontroliše.
Regulatori pritiska tip:121 i tip:121- BV su konstruisani i proizvedeni u skladu sa EN 334.
Usklađenost sa direktivom 2014/68/EC i CE označavanje regulatora pritiska i odgovarajućih uređaja
zahteva instalaciju na sisteme u skladu sa odredbama EN 12186 i EN 12279.
Kao dodatni uređaji pod pritiskom dodati regulatorima pritiska tip:121 i tip:121-BV, moraju se koristiti
isključivo oni proizvedeni od strane GasTeh-a (npr: filteri, prigušivači, itd.).
Za probleme nastale korišćenjem dodatnih uređaja drugih proizvođača na regulatorima pritiska tip:121 i
tip:121- BV, GasTeh neće biti odgovoran.

GT-121-02 2
PED CATEGORIES AND FLUID GROUP
Regulators type 121 and type 121- BV are classified as differential strength regulators, and marking for
these types of regulators is the symbol DS.
Regulators type 121 and type 121- BV are fail-to-open regulators.
Fail- to- open stand- alone regulators cannot be used as a safety accessory according to
PED 2014/68/EC to protect downstream pressure equipment.
According to PED 2014/68/EC gas pressure regulators type 121 and 121- BV depending of their size are
in the following groups:
Size
Category
Fluid group
DN25
Art.3.3
1
DN32
I
1
DN40
I
1
DN50
II
1
All sizes with
slam-shut
IV
1
Table 1.
Safety shut- off device type: GT.BM.VNP.02.65.P.Z. or type: GT.BM.VP.02.65.P.Z., incorporated in
regulator type: 121- BV, conform to PED 2014/68/EC Article 3.3 and were designed and manufactured
according to sound engineering practice (SEP) and they are not CE marked .
KATEGORIJE I GRUPE FLUIDA PREMA PED DIREKTIVI
Regulatori pritiska gasa tip 121 i tip: 121- BV spadaju u klasu regulatora koji sadrže elemente projektovane
za pritiske (PSD) koji su manji od projektnog pritiska (PS). Na tablici nose oznaku DS.
Regulatori pritiska tip 121 i tip 121- BV su u izvedbi u otkazu otvoreni.
Regulator pritiska sa izvedbom u otkazu otvoren prema direktivi PED 2014/68/EC se ne može koristiti
kao sigurnosni uređaj.
Prema PED 2014/68/EC regulatori pritiska tip: 121 i tip: 121- BV, zavisno od dimenzija, spadaju u sledeće
grupe:
Dimenzija
Kategorija
Grupa fluida
DN25
Art.3.3
1
DN32
I
1
DN40
I
1
DN50
II
1
Svi regulatori sa
blokadnim meh.
IV
1
Tabela 1.

GT-121-02 3
Blokadni mehanizami tip: GT.BM.VNP.02.65.P.Z. i tip: GT.BM.VP.02.65.P.Z., ugrađeni na regulatore tip:
121- BV, prema direktivi PED 2014/68/EC spadaju u kategoriju Art. 3.3. i projektovani su i proizvedeni u
skaldu sa Sound Engineering Practice (SEP) i ne označavaju se CE znakom.
SPECIFIKACIJA REGULATORA TIP: 121 I TIP: 121-BV
Nazivne dimenzije: DN25, DN32, DN40, DN50
Klasa pritiska: PN16, PN25, ANSI 150
Projektni pritisak (PS): 25 bar
Maksimalni radni pritisak: 19 bar
Opseg izlaznog pritiska: 0,02 ÷0,5 (1) bar
Klasa temperature: 2 (-20°C ÷+60°C)
Navedene maksimalne temperature i pritisci ne smeju biti prekoračeni!
Regulator pritiska ne zahteva dodatni sigurnosni uređaj instaliran pre regulatora za zaštitu od prevelikog
pritiska u odnosu na projektni pritisak PS, kada je redukciona stanica pre regulatora projektovana za
maksimalni pritisak jednak ili manji od 1.1 x PS.
Regulatori tip 121 i tip 121- BV se ne koriste kao monitori, i nisu opremljeni sa indikatorima položaja
otvorenosti.
REGULATOR TYPE: 121 AND TYPE: 121-BV SPECIFICATION
Available size : DN25, DN32, DN40, DN50
Nominal pressure: PN16, PN25, ANSI 150
! WARNING !
Design pressure (PS): 25 bar
Maximum operating pressure: 19 bar
Range of outlet pressure: 0,02 ÷0,5 (1) bar
Temperature class: 2 (-20°C ÷ +60°C)
Maximum temperatures and pressures above mentioned should not be exceeded!
Pressure regulator does not require any safety accessory installed upstream for protection against
overpressure compared with design pressure PS, when reducing station installed upstream is sized for a
max downstream incidental pressure MIPdis less or equal 1,1 x PS.
Regulators type 121 and type 121- BV are not used as stand- by monitor and are not equiped with any
external visual device which indicates wheather the control member is in the closed or in fully open
position.
! UPOZORENJE !

GT-121-02 4
MARKING OF REGULATOR TYPE: 121 AND TYPE: 121-BV /
OZNAČAVANJE REGULATORA TIP: 121 I TIP: 121-BV
The nameplate shall contain all basic informations about mentioned products. / Tablica regulatora mora
sadržati sve potrebne informacije o osnovnim karakteristikama regulatora.
Table 2. / Tabela 2.
NOTE 1:
- for regulator dimension DN25 (art.3.3 acc. to PED 2014/68/EC): - (nothing)
- for regulators DN32 and DN40 (category I acc. to PED 2014/68/EC): CE sign
- for regulator dimension DN50 (category II acc. to PED 2014/68/EC): CE sign and NB2028
- for all regulators wit slam-shut (category IV to PED 2014/68/EC): CE sign and NB2028
PRIMEDBA 1:
- za regulator DN25 (art.3.3 po direktivi PED 2014/68/EC): - (ništa)
- za regulatore DN32 i DN40 (kategorija I prema direktivi PED 2014/68/EC): CE
- za regulator DN50 (kategorija II prema direktivi PED 2014/68/EC): CE i 2028
-za sve regulatore sa blokadnim mehanizmom (kategorija IV prema direktivi PED 2014/68/EC): CE i 2028
List of symbols:
Wds –specific set range
pds –set point
pdo –relief valve –set pressure
ds–nozzle diameter
AC –accuracy class
SG –lock-up pressure class
SZ –class of lock-up pressure zone
Type –DS (differential strenght)
Temp. class –2 (-20°C ÷+60°C)
Regulator in failure –OPEN
pmax –maximum operating pressure
PS –allowable pressure
PSD –specific maximum allowable pressure
Lista simbola:
Wds –posebno područje podešavanja izlaznog pritiska
pds –izlazni pritisak regulatora
pdo –pritisak otvaranja –odušni ispusni ventil
ds–prečnik sedišta
AC –klasa tačnosti
SG –klasa pritiska zatvaranja
SZ –zona pritisaka zatvaranja
Tip –DS (differential strenght)
Temp. klasa –2 (-20°C ÷+60°C)
Regulator u otkazu - OTVOREN
pmax –maksimalni radni pritisak
PS –maksimalni dozvoljeni pritisak
PSD –specifični maksimalni dozvoljeni pritisak

GT-121-02 5
SPECIFIKACIJA BLOKADNOG MEHANIZMA TIP: GT.BM.VNP.02.65.P.Z I
TIP: GT.BM.VP.02.65.P.Z
Nazivne dimenzije: DN25, DN32, DN40, DN50
Klasa pritiska: PN16, PN25, ANSI 150
Projektni pritisak (PS): 5 bar
Maksimalni radni pritisak : 1 bar
Blokadni mehanizam se instalira na regulator sa maksimalnim radnim pritiskom 19 bar. Maksimalni radni
pritisak blokadnog mehanizma je maksimalni izlazni pritisak iz regulatora.
Opseg pritisaka blokiranja:
- za visoke pritiske: 0.03 ÷ 1 bar (klasa tačnosti AG 2.5)
- za niske pritiske: 0.002 ÷ 0.3 bar (klasa tačnosti AG 5)
Vreme odziva: ≤1s
Temperature class: 2 (-20°C ÷+60°C)
SAFETY SHUT- OFF DEVICE TYPE: GT.BM.VNP.02.65.P.Z. AND
TYPE: GT.BM.VP.02.65.P.Z SPECIFICATION
Available size: DN25, DN32, DN40, DN50
Nominal pressure: PN16, PN25, ANSI 150
! WARNING !
Maximum operating pressure: 1 bar
Design pressure (PS): 5 bar
Safety shut- off device is installed on regulator with maximum operating pressure 19 bar. Maximum
operating pressure for safety shut-off device is maximum regulator outlet pressure.
Set range:
- for high pressure: 0.03 ÷ 1 bar (accuracy group AG 2.5)
- for low pressure: 0.002 ÷ 0.3 bar (accuracy group AG 5)
Response time : ≤1s
Temperature class: 2 (-20°C÷ +60°C)
! UPOZORENJE !

GT-121-02 6
MARKING OF SAFETY SHUT-OFF DEVICE TYPE: GT.BM.VNP.02.65.P AND TYPE:
GT.BM.VP.02.65.P / OZNAČAVANJE BLOKADNOG MEHANIZMA ТIP: GT.BM.VNP.02.65.P I
TIP: GT.BM.VP.02.65.P
The nameplate shall contain all basic informations about mentioned products. / Tablica mora sadržati sve
potrebne informacije o osnovnim karakteristikama blokadnog mehanizma.
Table 3./ Tabela 3.
List of symbols:
Wdso - specific set range for over-pressure monitoring
Wdsu –specific set range for under-pressure monitoring
pdso –set point for over-pressure monitoring
pdsu –set point for under-pressure monitoring
Funct. class –A (closed in case of failure)
Type –IS (integral strenght)
Temp. class –2 (-20°C ÷+60°C)
pmax –maximum operating pressure
PS –allowable pressure
PSD –specific maximum allowable pressure
Lista simbola:
Wdso - područje podešavanja nadpritiska
Wdsu –područje podešavanja podpritiska
pdso –pritisak aktiviranja –gornji
pdsu –pritisak aktiviranja –donji
Funkc. klasa –A (u otkazu zatvoren)
Tip –IS (integral strenght)
Temp. klasa –2 (-20°C ÷+60°C)
pmax –maksimalni radni pritisak
PS –maksimalni dozvoljeni pritisak
PSD –specifični maksimalni dozvoljeni pritisak
OVERPRESSURE PROTECTION
The recommended maximum allowable pressures are stamped on the regulator nameplate.
If actual version hasn´t a built-in safety shut-off device, some type of overpressure protection is needed.
The regulator should be inspected for damage after any overpressure condition.
ZAŠTITA OD PREVISOKOG PRITISKA
Preporučeni maksimalni dozvoljeni pritisci su naznačeni na tablici regulatora.
Ako regulator nema ugrađen blokadni mehanizam, mora se predvideti neka druga vrsta zaštite od
previsokog pritiska.
Posle svakog prekoračenja pritiska, potrebno je izvršiti pregled regulatora zbog mogućih oštećenja.

GT-121-02 7
TRANSPORT, PACKING AND HANDLING
Established transport and handling procedures shall be folowed to avoid any damage during transporting
and handling of those equipment. The packing for transportation of equipment are designed and shaped to
avoid damage to any part. After packing is open, check that no damage occured to any position. If damage
occured inform the suplier and keep original packing.
TRANSPORT, PAKOVANJE I RUKOVANJE
Prilikom transporta rukovoditi se uspostavljenim procedurama, kako bi se sprečila moguća oštećenja
opreme prilikom transporta. Kutije za transport su tako projektovane i oblikovane da se izbegnu bilo kakva
oštećenja prilikom transporta. Posle otvaranja, proveriti opremu i ukoliko se uoče oštećenja obavestiti
dobavljača. Originalno pakovanje sačuvati.
INSTALLATION
Only qualified person shall install or service a regulator.
! WARNING !
All means for venting have to be provided in the assemblies where the pressure equipment is installed
(according to EN 12186 and EN12279).
All means for draining have to be provided in the equipment installed before regulators and safety
shut-off devices (according to EN 12186 and EN 12279).
Before proceeding with installation, commisioning or maintence, operators must:
- examine the safety provisions applicable to the installation in which they must work
- obtain the authorisations necessery for working when so requested
- use the necessary means of individual protection
- ensure that the area in which they operate is fitted with the means of collective protection envisaged and
with the necessary safety indications
Before installating the regulator it is necessary to ensure that:
- clean out all pipelines and check that regulator is clean and is not damaged during transport
- that regulator can be fitted into the space provided
- the upstream and downstream piping is in the same level
- the inlet and outlet flanges are parallel and clean
- make shure that data on regulator plate is compatible with operating requirements
- make shure that arrow on regulators body and flow are in the same directions
Pressure regulators shall be instaled in non- seismic area and hasn´t to undergo fire and must be provided
cathodic protection and electrical isolation.

GT-121-02 8
Recomended installation:
Picture 1. / Slika 1.
Installation / Ugradnja
Regulator can be mounted in other position if required (consult GasTeh personel for advice).
Before start-up regulator, impulse connections must be connected with the main pipeline. This connections
shoud be made using stainless steel or cooper pipe with minimum internal diameter of 8 mm.
MONTAŽA
Montažu mogu da vrše samo stručna i osposobljena lica. Pogledati sliku 1.
! UPOZORENJE !
Ventilacioni vodovi moraju biti obezbeđeni u sistemima gde se instalira gasna oprema (EN 12186 i EN
12279)
Vodovi za odmuljenje moraju biti obezbeđeni na opremi pre regulatora i blokadnog
mehanizma ( EN 12186 i EN 12279).
Pre početka izvođenja montaže, pregleda ili održavanja, lice mora da:
- proveri sigurnosne uslove koji se odnose na instalaciju u kojoj treba da radi
- ukoliko je potrebno, pribavi sve dozvole za rad
- koristi neophodnu zaštitnu opremu
- obezbedi da prostor u kome se radi ima uređaje za opštu bezbednost i uređaje za sigurnosnu indikaciju
Pre montaže regulatora potrebno je obezbediti:
- očistiti cevovode, proveriti da li je regulator čist i da nije oštećen prilikom transporta
- da se regulator može postaviti na predviđeno mesto
- da su ulazni i izlazni cevovodi saosni
- da su ulazna i izlazna prirubnica paralelne i čiste
- proveriti podatke na tablici regulatora, da li se slažu sa zahtevanim radnim parametrima
- proveriti da li je smer proticanja gasa istog smera kao i strelica na telu regulatora
Oprema pod pritiskom mora biti instalirana na mestima neugroženim seizmičkom aktivnošću, ne sme biti
izložena požaru i mora biti obezbeđena električna izolovanost i katodna zaštita.
Regulator može biti montiran i u drugim položajima (konsultovati tehnička lica GasTeh-a)
Pre puštanja u rad regulatora i blokadnog mehanizma, impulsni vodovi moraju biti povezani sa impulsnim
priključcima na cevovodu. Impulsni vodovi treba da se izvedu cevima od nerđajućeg čelika ili bakarnim
cevima unutrašnjeg prečnika najmanje 8 mm.

GT-121-02 9
COMMISSIONING
After installation check that the inlet/outlet on/off valves , by-pass and other lines are closed.
The regulator and safety shut-off device is factory set at approximately the midpoint of the pressure
requested, so an initial adjustment may be required to give the desired results.
With proper installation completed, slowly open the inlet valve.
To relatch safety shut-off device, remove handle (H) from lower blocade housing (B) (see Picture A.).
Rotate handle and screw it onto rod (R) (see Picture B.). Slowly pull handle to the moment when gas
flow through pad unit and keep it in this position several seconds until pressures stabilize, then
completely move handle in open position and release it (see Picture C.). Properly worked safety shut-off
device remain latched. Then unscrew handle from rod and screw it into blocade housing.
Slowly open the outlet valve and monitor pressure with a pressure gauges.
Picture A. / Slika A. Picture B. / Slika B. Picture C. / Slika C.
PUŠTANJE U RAD
Nakon instalacije, proveriti da li su ulazna/izlazna slavina, by-pass linije i ostale linije zatvoreni. Regulator
i blokadni mehanizam su fabrički podešeni na sredinu zahtevanog opsega pritisaka, tako da je možda
potrebno eventualno malo podešavanje da bi se ostvario zahtevani pritisak. Nakon uspešno izvedene
instalacije, polako otvoriti ulaznu.
Deblokiranje blokadnog mehanizma vrši se na sledeći način (prikazano na slikama A., B. i C.). Skinuti
ručni potezač (H) sa donjeg kućišta blokade (B) (videti sliku A.). Okrenuti ručni potezač i navrnuti ga na
osovinicu (R) (videti sliku B.). Polako povući ručni potezač toliko da gas može da prestrojava kroz pečurku
blokade i zadržati ga nekoliko sekundi u tom položaju dok se pritisci ne izjednače, onda izvući ručni potezač
do kraja, zatim pustiti potezač (videti sliku C.). Ispravan blokadni mehanizam ostaje u zabravljenom
položaju. Odvrnuti ručni potezač sa osovinice i ponovo ga uvrnuti u donje kućište blokade.
Polako otvoriti izlaznu slavinu i pratiti pritisak pomoću manometara.
ADJUSTMENT (Picture 2.)
To change the outlet pressure, remove the cover (18) from upper housing (23) and turn the adjusting screw
(17) clockwise to increase outlet pressure or counter clockwise to decrease outlet pressure. Setting pressure
monitor with a test gauge downstream the regulator.
PODEŠAVANJE (Slika 2.)
Za podešavanje izlaznog pritiska potrebno je prvo skiniti poklopac (18) sa kućišta opruge (23). Okretanjem
pritezača opruge (17) u smeru kazaljke na satu dolazi do povećanja izlaznog pritiska, dok okretanjem u
suprotnom smeru, izlazni pritisak opada. Podešavanje pritiska se prati na manometru iza regulatora.