9.0 INFORMATION REGARDING FAULTS
VL
2
VAL.130.--.M.EN Issue: A1
09.16
50
9.2 Check-list in case of fault
If you have been unable to solve the problem on the valve even after having carried out the operations sug-
gested in paragraph “Trouble-shooting” please contact the plant technician/installer/or the Manufacturer.
If technical assistance is required, in addition to the valve data, the plant technician/installer or Manufacturer
will also need information concerning the plant in which the valve is installed, its installation and its working, for
EHWWHULGHQWL¿FDWLRQRIWKHSUREOHPWKDWKDVRFFXUUHG
Obviously many of the checking operations which are requested have already been performed in the various
steps during installation, testing and start-up of the valve concerned.
Danger - Warning
Before carrying out any operation ³set the valve concerned in safety´ (see ³Glossary and terminol-
ogy´), operate according to the indications on the ³Operation and Maintenance Manual´ and in accord-
ance with and in compliance with the standards in force as regards health and safety.
1) Information necessary
a) Description of problem;
b) Material handled;
c) Photo showing the entire valve and how it is installed;
d) Valve type;
e) Does the valve start up without any problem after long shutdowns?
f) Is the outlet spout free of encrustations which reduce the cross-section?
g) Is the vent of the weigh hopper into which the valve discharges the material sized correctly; is it clean and
does it work properly?
2) Checking the silo
a) What is the inclination of the cone?
b) How much material does the silo contain?
c) ,VWKHVLORHTXLSSHGZLWKDEULGJHEUHDNHUEDIÀHSODWH"
d) ,VWKHVLORSURYLGHGZLWKÀXLGL]DWLRQDHUDWLRQ"
How many nozzles or aeration pads are preset on the cone, how are they arranged and what is their dis-
WDQFHIURPWKHRXWOHWÀDQJHRIWKHVLOR"
What is the operating pressure and the operating cycle?
e) Is the silo provided with a vibrator or a hammering device?
What is the operating cycle?
NOTE: If the valve got clogged with product in a silo which cannot be emptied, cut the bottom of the scraper
and make sure the adjustable seal system is in 0 position.
To Next Page
Loading...
Need help?
General
