ARI Armaturen FABA-LA EN - Manual (Page 13)

Rev. 0040103002 0410 Page 13
Operating and installation instructions
FABA
®
-Plus / FABA
®
-Supra / FABA
®
-LA
9.0 Troubleshooting table
ATTENTION !
- read point 10.0 and 11.0 prior to dismantling and repair work!
- read point 6.0 before restarting the plant !
Fault Possible cause Corrective measures
No flow Valve closed Open valve
Flange covers not removed
(pos. 32, Fig. 1 - Fig. 8) Remove flange covers
(pos. 32; Fig. 1 - Fig. 8)
Little flow Valve not sufficiently open Open valve.
Dirt sieve clogged Clean / replace sieve.
Piping system clogged Check piping system.
Valve difficult to move or
cannot be opened Stem (pos. 4.2) dry (Fig. 11 - Fig. 10) Grease stem (pos. 4.2)
(Fig. 11 - Fig. 10)
(Lubricant: refer to page 10)
Wrong direction of rotation Turn in correct direction
(anticlockwise to open valve)
Lubricating nipple / locking screw
tightened Loosen lubricating nipple / locking
screw
Valve stem leaking Bellows seal damaged Replace top of bellows seal at earliest
opportunity!
Gland screw (pos. 12, Fig. 10) slack Tighten gland screw (pos. 12, Fig. 10)
until leakage stops; Replace bonnet at
earliest opportunity!
Stuffing box gland (pos. 27) slack
(Fig. 1 - Fig. 8) Tighten stuffing box gland (pos. 27)
until leakage stops
-Hex. nut (Fig. 1 - Fig. 8).
Replace bonnet at earliest opportunity!
If necessary, renew packing in stuffing
box seal (pos. 6); Observe warnings
(Fig. 11 - Fig. 10)!
Leakage across valve seat Valve not properly closed. Pull hand wheel tight without tools
Seat (pos. 1.2) / plug (pos. 3) damaged
by foreign particles (Fig. 1 - Fig. 8) Replaced valve or rework sealing
surfaces
Pressure difference too high. Use a valve with pressure balancing
plug (refer to point 5.3)
Medium contaminated
(suspended solids). Clean valve;
Install a strainer upstream of valve
Valve with throttling plug +
stroke limiter + locking
screw cannot be opened Lubricating nipple / locking screw has
been tightened. Release lubricating nipple / locking
screw
Stroke limiter is countered Loosen counter nut, screw the stroke
limiter higher