Table des Matières
Publicité
Jul. 15, 2011
Jul. 15, 2011
Jul. 15, 2011
X. Operating Principles
X. Principes de fonctionnement
X. Operating Principles
X. Operating Principles
The 1700-S series Maxiflow valve operates during closing
Les soupapes de sûreté Maxiflow 1700-S Series opèrent
on a back pressure principle, that is, the force of trapped
The 1700-S series Maxiflow valve operates during closing
The 1700-S series Maxiflow valve operates during closing
à la fermeture sur le principe de la contre-pression dans
steam on the upper side of the disc holder is utilized to
on a back pressure principle, that is, the force of trapped
on a back pressure principle, that is, the force of trapped
le sens où la force de la vapeur accumulée sur le dessus
assist the spring in forcing the disc back down onto its
steam on the upper side of the disc holder is utilized to
du support de disque sert à assister le ressort pour
steam on the upper side of the disc holder is utilized to
seat.
assist the spring in forcing the disc back down onto its
contraindre le disque contre son siège.
assist the spring in forcing the disc back down onto its
seat.
In Figure 6, 100% lift is attained by proper location of the
seat.
Sur la Figure 6, une levée de 100 % est obtenue par
le positionnement approprié des bagues de réglage
upper and lower adjusting rings (G) and (O), respectively.
In Figure 6, 100% lift is attained by proper location of the
In Figure 6, 100% lift is attained by proper location of the
supérieure et inférieure, (G) et (O) respectivement. Une
When full lift is attained, as in Figure 7, lift stop (M) rests
upper and lower adjusting rings (G) and (O), respectively.
upper and lower adjusting rings (G) and (O), respectively.
fois que la levée complète est atteinte, comme sur la
against coverplate (P) to eliminate hunting, thus adding
When full lift is attained, as in Figure 7, lift stop (M) rests
Figure 7, la butée de levée (M) s'appuie contre la plaque
When full lift is attained, as in Figure 7, lift stop (M) rests
stability to the valve. When the valve discharges in an
against coverplate (P) to eliminate hunting, thus adding
protectrice (P) pour supprimer le flottement, contribuant
against coverplate (P) to eliminate hunting, thus adding
open position, steam is bled into chamber (H) through
ainsi à la stabilité de la soupape. Lorsque la décharge
stability to the valve. When the valve discharges in an
stability to the valve. When the valve discharges in an
de la soupape a lieu en position ouverte, la vapeur est
open position, steam is bled into chamber (H) through
open position, steam is bled into chamber (H) through
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 collerette
is adjusted so that it moves down into the floating washer
When closing, as in Figure 8, the spindle overlap collar (K)
de chevauchement de l'axe (K) est actionnée de façon
When closing, as in Figure 8, the spindle overlap collar (K)
(L), thereby effectively reducing the escape of steam from
is adjusted so that it moves down into the floating washer
à descendre dans la rondelle flottante (L), ce qui réduit
is adjusted so that it moves down into the floating washer
chamber (H).
efficacement le débit de vapeur s'échappant de la chambre
(L), thereby effectively reducing the escape of steam from
(L), thereby effectively reducing the escape of steam from
(H).
chamber (H).
The resulting momentary pressure building-up in
chamber (H).
L'accumulation momentanée de pression en résultant dans
chamber (H), at a rate controlled by orifice (N), produces
The resulting momentary pressure building-up in
The resulting momentary pressure building-up in
la chambre (H), à un taux régulé par l'orifice (N), engendre
a downward thrust in the direction of spring loading.
chamber (H), at a rate controlled by orifice (N), produces
chamber (H), at a rate controlled by orifice (N), produces
une poussée vers le bas dans le sens de la charge du
The combined thrust of the pressure and spring loading
a downward thrust in the direction of spring loading.
ressort. La poussée combinée de la pression et de la
a downward thrust in the direction of spring loading.
results in positive and precise closing. Cushioning of the
The combined thrust of the pressure and spring loading
charge du ressort se traduit par une fermeture positive et
The combined thrust of the pressure and spring loading
précise. L'amortissement de la fermeture est régi par la
closing is controlled by the lower adjusting ring (O).
results in positive and precise closing. Cushioning of the
results in positive and precise closing. Cushioning of the
bague de réglage inférieure (O).
closing is controlled by the lower adjusting ring (O).
closing is controlled by the lower adjusting ring (O).
Copyright 2020 Baker Hughes 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,
évacuée dans la chambre (H) par deux trous de purge (J)
the spindle overlap collar (K) rises to a fixed position
two bleed holes (J) in the roof of the disc holder. Similarly,
two bleed holes (J) in the roof of the disc holder. Similarly,
dans le ciel du support de disque. De même, la collerette
above the floating washer (L). The area between the
the spindle overlap collar (K) rises to a fixed position
the spindle overlap collar (K) rises to a fixed position
de chevauchement de l'axe (K) remonte pour atteindre
floating washer and the spindle is thereby increased by
above the floating washer (L). The area between the
une position fixe au-dessus de la rondelle flottante (L). La
above the floating washer (L). The area between the
the difference in the two diameters on the overlap collar.
zone entre la rondelle flottante et l'axe est par conséquent
floating washer and the spindle is thereby increased by
floating washer and the spindle is thereby increased by
augmentée de la différence entre les deux diamètres sur
the difference in the two diameters on the overlap collar.
Under this condition, steam in chamber (H) enters into
the difference in the two diameters on the overlap collar.
la collerette de chevauchement. Dans cet état, la vapeur
chamber (Q) through the secondary area formed by
Under this condition, steam in chamber (H) enters into
dans la chambre (H) parvient dans la chambre (Q) par la
Under this condition, steam in chamber (H) enters into
the floating washer (L) and the overlap collar (K) on
zone secondaire formée par la rondelle flottante (L) et la
chamber (Q) through the secondary area formed by
chamber (Q) through the secondary area formed by
collerette de chevauchement (K) sur l'axe puis par l'orifice
the spindle, then through orifice (N), and escapes to
the floating washer (L) and the overlap collar (K) on
the floating washer (L) and the overlap collar (K) on
(N) et est évacuée à l'air libre par le raccord de décharge
atmosphere through the pipe discharge connection (R).
the spindle, then through orifice (N), and escapes to
the spindle, then through orifice (N), and escapes to
de la canalisation (R)
atmosphere through the pipe discharge connection (R).
atmosphere through the pipe discharge connection (R).
R
R
K
R
K
K
Q
Q
Q
L
L
L
H
H
H
M
M
P
M
G
P
P
G
G
O
J
O
O
J
J
Figure 7 : Levée complète
N
N
N
R
R
R
H
H
H
P
P
P
J
J
J
Manuel d'instructions pour soupapes de sûreté Consolidated Maxiflow 1700 Series | 17
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
L
Q
L
L
M
M
G
M
G
G
O
O
O
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