4.3
INDBYGGET SLAM-SHUT-VENTIL HB/97
Ventilen er en indretning (fig. 12), der straks blokerer
for gasstrømmen, hvis trykket nedstrøms, som følge
af en form for svigt, når det punkt der er indstillet
som aktiveringspunkt for ventilen. Ventilen kan også
aktiveres manuelt.
For trykregulatoren REFLUX 819 er der mulighed for
at have ventilen HB/97 indbygget enten på regulatoren
eller med monitor på linjen.
De vigtigste karakteristika ved denne
blokeringsindretning er:
• Lukkemekanisme balanceret ventil
• Automatisk pneumatisk indirekte aktivering
• Lokal tast for lukning
• Indgreb ved at forøge og/eller sænke trykket
• Konstruktionstryk: 100 bar for alle dele;
• Præcision (AG): ± 1% i forhold til den indstillede
værdi ved trykstigninger; ± 5% for trykfald;
• Indbygget by-pass-ventil
• Kun manuel genopretning
4.3.1
FUNKTION SLAM-SHUT-VENTIL SB/97
(FIG.13)
Slam-shut-ventilen består primært af følgende dele:
• Lukkemekanisme balanceret ventil (pos. 12)
• Enkeltvirkende pneumatisk aktuator (pos.11)
• Line-off-enhed (fra pos. 1 til pos. 10). Ved
manglende tryk vil lukkemekanisme holdes på
plads mod ventilens base, af fjederen (pos.13).
Kontroltrykket opnås ved at trække gas ved
trykket Pe direkte opstrøms i forhold til ventilen.
Gassen passerer gennem ventilen (1) (som kan
4.3
INCORPORATED HB/97 SLAM-SHUT VALVE
This is a device (fig.12) which immediately blocks
the gas flow if, following some kind of failure, the
downstream pressure reaches the set-point for its
intervention, or is operated manually.
On the REFLUX 819 regulator, it is possible to have the
HB/97 slam-shut incorporated both with the service
regulator or on the one functioning as in-line monitor.
The main characteristics of the slam-shut device are:
• balance valvue obturator;
• indirect, self-fed, pneumatic actuation;
• local close button;
• interventation with pressure increase and/or
decrease;
• design pressure: 100 bar for all the components;
• precision (AG): ±1% of the pressure set-point for
pressure increases; ± 5% for pressure drops;
• incorporated by-pass;
• manual reset only;
4.3.1 HB/97 SLAM-SHUT OPERATION (FIG. 13)
The cut-off device consist principally of the following
parts:
•
on/off valve (pos. 12);
•
single action pneumatic actuator (pos. 11);
•
line-off device (from pos.1 until pos. 10);
When there is no pressure, the valve obturator is held in
the closed position by the spring, (pos. 13), and rests
on the valve seat. The control pressure is obtained by
taking off gas at pressure Pe directly upstream from
the valve. The gas passes through the valve (1) (which
can deviate pressure towards the downstream piping
TEKNISK VEJLEDNING MT050
TECHNICAL MANUAL MT050
32
MANUALE TECNICO MT050
TECHNICAL MANUAL MT050
TECHNISCHES HANDBUCH MT050
4.3
VALVOLA DI BLOCCO INCORPORATA
HB/97
4.3
INCORPORATED HB/97 SLAM-SHUT
VALVE
4.3
INTEGRIERTES SICHERHEITSAB-
SPERRVENTIL (SAV) HB/97
E’ un dispositivo (fig.12) che blocca
immediatamente il lusso del gas se, a causa
di qualche guasto, la pressione di valle
raggiunge il valore prefissato per il suo
intervento, oppure se la si aziona
manualmente.
Per il regolatore di pressione REFLUX 819
esiste la possibilità di avere la valvola
HB/97 incorporata sia sul regolatore di
servizio come pure su quello con funzione di
monitor in linea.
Le principali caratteristiche di tale
dispositivo di blocco sono:
•
otturatore valvola bilanciato;
•
azionamento pneumatico indiretti
autoalimentato;
•
pulsante di chiusura locale;
•
intervento per incremento e/o
diminuzione della pressione;
•
pressione di progetto: 100 bar per tutti i
componenti;
•
precisione (AG): ± 1% sul valore della
pressione di taratura per aumenti di
pressione; ±5% per diminuzione;
•
by-pass incorporato;
•
riarmo solo manuale;
This is a device (fig.12) which immediately
blocks the gas flow if, following some kind
of failure, the downstream pressure reaches
the set-point for its intervention, or is
operated manually.
On the REFLUX 819 regulator, it is possible
to have the HB/97 slam-shut incorporated
both with the service regulator or on the one
functioning as in-line monitor.
The main characteristics of the slam-shut
device are:
•
balance valvue obturator;
•
indirect, self-fed, pneumatic actuation;
•
local close button;
•
interventation with pressure increase
and/or decrease;
•
design pressure: 100 bar for all the
components;
•
precision (AG): ±1% of the pressure set-
point for pressure increases; ± 5% for
pressure drops;
•
incorporated by-pass;
•
manual reset only;
Das Sicherheitsabsperrventil SAV (Fig. 12)
dient zur sofortigen Unterbrechung des
Gasdurchflusses, falls der Regeldruck
aufgrund irgendeiner Störung einen
voreingestellten Auslösedruck über-
und/oder unter-schreiten sollte oder falls das
SAV von Hand ausgelöst wird.
Beim REFLUX 819 kann das SAV HB/97
sowohl am Betriebsregler als auch am in
Reihe geschalteten Monitor integriert
werden.
Die wichtigsten Merkmale dieses
Sicherheitsabsperr-ventils sind:
•
Druckausgeglichenes Stellglied
• indirekte pneumatische SAV-Auslösung
durch
Druckentnahme aus dem Kreislauf
•
lokaler Drucktaster zum Schließen des
SAV
•
Auslösung bei Maximalwert und/oder
Minimalwert
•
zul. Druckbeanspruchung: 100 bar für
alle Bauteile
•
Auslösung bei Druckanstieg und/oder
Druckabfall
•
Ansprechgruppen (Ag)
Oberer Ansprechwert: ± 1% auf den
Regeldruck
Unterer Ansprechwert: ± 5% auf den
Regeldruck
•
Integriertes Bypass-Ventil
•
Wiedereinschaltung nur manuell
Fig. 12
Fig. 12 /
Fig. 12
20
Summary of Contents for REFLUX 819
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