SPX APV DELTA DF plus 2, Руководство по эксплуатации

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14. Detection of Seal Damage
20
UK
Failure Remedy
V a l v e c l o s e d a n d p r e s s u r e i n u p p e r h o u s i n g
Leakage between housing and Replace housing seal (3), shaft seal (23),
yoke flange seat seal (24).
Leakage at the upper valve shaft Replace shaft seal (23), seat seal (24)
in the yoke area and guide bushes (20, 21).
Leakage from the leakage chamber of the Replace seat seal (7).
lower valve shaft Check function of control of
seat lift actuator.
Leakage from the leakage bore Replace housing seals (3).
V a l v e c l o s e d a n d p r e s s u r e i n l o w e r h o u s i n g
Leakage between housing and Replace housing seals (3).
housing cover (1)
Leakage at the outside surface of the Replace shaft seal (28), seat seal (27)
lower valve shaft and guide band (29).
Leakage from the leakage chamber of the Replace seat seal (5).
lower valve shaft
Leakage from the leakage bore Replace housing seals (3).
V a l v e o p e n
Leakage from the leakage chamber of the Replace seat seal (5).
lower valve shaft
Leakage from the leakage bore Replace housing seals (3).
A c t u a t o r
Air escapes from the actuator rod Replace O-ring (2) at the
actuator top.
Actuator does not work (air escapes Replace the complete actuator.
permanently from the venting plug)
V a l v e f e e d b a c k
Feedback is missing Carry out fine adjustment.
Double Seat Valve
DELTA DFplus2
Operating Manual: rev. 1
DELTA DFplus2 - UK1 / qxd.12.2004