22
■EPDT-179c■
Problem II: Reduced pressure does not reach the prescribed value. Or, fluid fails to
flow.
Presumable cause II.12: The strainer at the inlet is clogged.
Action (33) : Clean the strainer screen.
Presumable cause II.13: Needle valve
○
○
○
○
37
37
37
37
is clogged by foreign materials.
Action (34) : Follow steps described in Actions (4) to (6).
Presumable cause II.14: Foreign material is pinched between diaphragm shell
⑲
⑲
⑲
⑲
and
slide of top guide
⑧
⑧
⑧
⑧
.
Action (35) : Follow steps described in Actions (26).
Presumable cause II.15: Foreign object is pinched between spindle
⑫
⑫
⑫
⑫
and slide of
bottom guide
⑯
⑯
⑯
⑯
.
Action (36) : Follow steps described in Actions (27).
Problem III: External leakage
Presumable cause III.16: Needle valve
○
○
○
○
37
37
37
37
is clogged by foreign materials.
Action (37) : Follow steps described in Actions (4) to (6).
Presumable cause III.17: Hexagon head bolt
⑱
⑱
⑱
⑱
of bottom cover is loosened. Or, O-ring
is damaged.
Action (38) : Retighten hexagon head bolt
⑱
of bottom cover.
Action (39) : In the case the O-ring is damaged, unscrew hexagon head bolt
⑱
on the bottom cover.
Remove the cover and replace the O-ring with new one.
Action (40): Attach the bottom cover and secure it with hexagon head bolt
⑱
.
(Tightening torque: 20N·m)
