Table des Matières
Publicité
Jul. 15, 2011
Jul. 15, 2011
Jul. 15, 2011
X.
Principes de fonctionnement
X. Operating Principles
X. Operating Principles
X. Operating Principles
The 1700-S series Maxiflow valve operates during closing
Les soupapes de sûreté Maxiflow de la série 1700-S
The 1700-S series Maxiflow valve operates during closing
on a back pressure principle, that is, the force of trapped
The 1700-S series Maxiflow valve operates during closing
opèrent à la fermeture sur le principe de la contre-
on a back pressure principle, that is, the force of trapped
steam on the upper side of the disc holder is utilized to
on a back pressure principle, that is, the force of trapped
pression dans le sens où la force de la vapeur accumulée
steam on the upper side of the disc holder is utilized to
assist the spring in forcing the disc back down onto its
steam on the upper side of the disc holder is utilized to
sur le dessus du support de disque sert à assister le
assist the spring in forcing the disc back down onto its
seat.
assist the spring in forcing the disc back down onto its
ressort pour contraindre le disque contre son siège.
seat.
seat.
In Figure 6, 100% lift is attained by proper location of the
Sur la Figure 6, une levée de 100% est obtenue par
In Figure 6, 100% lift is attained by proper location of the
upper and lower adjusting rings (G) and (O), respectively.
In Figure 6, 100% lift is attained by proper location of the
le positionnement approprié des bagues de réglage
upper and lower adjusting rings (G) and (O), respectively.
When full lift is attained, as in Figure 7, lift stop (M) rests
upper and lower adjusting rings (G) and (O), respectively.
supérieure et inférieure, (G) et (O) respectivement. Une
When full lift is attained, as in Figure 7, lift stop (M) rests
against coverplate (P) to eliminate hunting, thus adding
When full lift is attained, as in Figure 7, lift stop (M) rests
fois que la levée complète est atteinte, comme sur la
against coverplate (P) to eliminate hunting, thus adding
stability to the valve. When the valve discharges in an
against coverplate (P) to eliminate hunting, thus adding
Figure 7, la butée de levée (M) s'appuie contre la plaque
stability to the valve. When the valve discharges in an
open position, steam is bled into chamber (H) through
stability to the valve. When the valve discharges in an
protectrice (P) pour supprimer le flottement, contribuant
open position, steam is bled into chamber (H) through
open position, steam is bled into chamber (H) through
ainsi à la stabilité de la soupape. Lorsque la décharge
R
N
R
N
R
N
H
H
H
P
P
P
J
J
J
Figure 6: 100% Lift
Figure 6: 100% Lift
Figure 6 : Levée à 100%
Figure 6: 100% Lift
When closing, as in Figure 8, the spindle overlap collar (K)
Lors de la fermeture, comme sur la Figure 8, la
When closing, as in Figure 8, the spindle overlap collar (K)
is adjusted so that it moves down into the floating washer
When closing, as in Figure 8, the spindle overlap collar (K)
collerette de chevauchement de l'axe (K) est actionnée
is adjusted so that it moves down into the floating washer
(L), thereby effectively reducing the escape of steam from
is adjusted so that it moves down into the floating washer
de façon à descendre dans la rondelle flottante (L), ce
(L), thereby effectively reducing the escape of steam from
chamber (H).
(L), thereby effectively reducing the escape of steam from
qui réduit efficacement le débit de vapeur s'échappant
chamber (H).
chamber (H).
The resulting momentary pressure building-up in
de la chambre (H).
The resulting momentary pressure building-up in
chamber (H), at a rate controlled by orifice (N), produces
The resulting momentary pressure building-up in
L'accumulation momentanée de pression en résultant
chamber (H), at a rate controlled by orifice (N), produces
a downward thrust in the direction of spring loading.
chamber (H), at a rate controlled by orifice (N), produces
dans la chambre (H), à un taux régulé par l'orifice (N),
a downward thrust in the direction of spring loading.
The combined thrust of the pressure and spring loading
a downward thrust in the direction of spring loading.
engendre une poussée vers le bas dans le sens de la
The combined thrust of the pressure and spring loading
results in positive and precise closing. Cushioning of the
The combined thrust of the pressure and spring loading
charge du ressort. La poussée combinée de la pression
results in positive and precise closing. Cushioning of the
closing is controlled by the lower adjusting ring (O).
results in positive and precise closing. Cushioning of the
et de la charge du ressort se traduit par une fermeture
closing is controlled by the lower adjusting ring (O).
closing is controlled by the lower adjusting ring (O).
positive et précise. L'amortissement de la fermeture est
régi par la bague de réglage inférieure (O).
© 2015 General Electric Company. Tous droits réservés.
14 | Dresser Consolidated
®
14 | Dresser Consolidated
®
14 | Dresser Consolidated
®
two bleed holes (J) in the roof of the disc holder. Similarly,
de la soupape a lieu en position ouverte, la vapeur est
two bleed holes (J) in the roof of the disc holder. Similarly,
the spindle overlap collar (K) rises to a fixed position
two bleed holes (J) in the roof of the disc holder. Similarly,
évacuée dans la chambre (H) par deux trous de purge (J)
the spindle overlap collar (K) rises to a fixed position
above the floating washer (L). The area between the
the spindle overlap collar (K) rises to a fixed position
dans le ciel du support de disque. De même, la collerette
above the floating washer (L). The area between the
floating washer and the spindle is thereby increased by
above the floating washer (L). The area between the
de chevauchement de l'axe (K) remonte pour atteindre
floating washer and the spindle is thereby increased by
the difference in the two diameters on the overlap collar.
floating washer and the spindle is thereby increased by
une position fixe au-dessus de la rondelle flottante
the difference in the two diameters on the overlap collar.
(L). La zone entre la rondelle flottante et l'axe est par
the difference in the two diameters on the overlap collar.
Under this condition, steam in chamber (H) enters into
conséquent augmentée de la différence entre les deux
Under this condition, steam in chamber (H) enters into
chamber (Q) through the secondary area formed by
Under this condition, steam in chamber (H) enters into
diamètres sur la collerette de chevauchement. Dans
chamber (Q) through the secondary area formed by
the floating washer (L) and the overlap collar (K) on
chamber (Q) through the secondary area formed by
cet état, la vapeur dans la chambre (H) parvient dans
the floating washer (L) and the overlap collar (K) on
the spindle, then through orifice (N), and escapes to
the floating washer (L) and the overlap collar (K) on
la chambre (Q) par la zone secondaire formée par la
the spindle, then through orifice (N), and escapes to
atmosphere through the pipe discharge connection (R).
the spindle, then through orifice (N), and escapes to
rondelle flottante (L) et la collerette de chevauchement
atmosphere through the pipe discharge connection (R).
atmosphere through the pipe discharge connection (R).
(K) sur l'axe puis par l'orifice (N) et est évacuée à l'air libre
par le raccord de décharge de la canalisation (R)
R
R
R
K
K
K
Q
Q
Q
L
L
L
H
H
H
M
M
M
P
G
P
P
G
G
O
O
J
O
J
J
Figure 7 : Levée complète
N
N
N
R
R
R
H
H
H
P
P
P
J
J
J
Notice d'instructions pour soupapes de sûreté Consolidated Maxiflow Série 1700
N
N
N
Figure 7: Full Lift
Figure 7: Full Lift
Figure 7: Full Lift
Figure 8 : Fermeture
Figure 8: Closing
Figure 8: Closing
Figure 8: Closing
K
K
K
Q
Q
Q
L
L
L
M
M
M
G
G
G
O
O
O
K
K
K
Q
Q
Q
L
L
L
M
M
M
G
G
G
O
O
O
| 17
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