Groth 1400 - Manual (Page 13)

12
TABLE 6: LUBRICANTS – RECOMMENDATIONS
FASTENER LOCATION LUBRICANT – SEALANT MANUF. & PART NO.
Actuator Fastener Dry Moly Film Crown #6080 or equal
Stem Guide MS2 Lubricant Fel-Pro [Loctite] #51048 or equal
Stem/Swivel Fitting Silicone Lubricant Dow Corning #33 or equal
Note: Lubricant selection must consider process environment.
TABLE 7: TROUBLESHOOTING GUIDE
PROBLEM INSPECTION SUGGESTED CORRECTIVE ACTION
Pilot Valve
Leak Visual, audible or
vapor detector Consult troubleshooting guide in specific pilot valve manual
Main Valve
Actuator Leak Visual, audible or
vapor detector Leakage at the actuator flange may be corrected by tightening
the fasteners adjacent to the leak path. If this is not successful,
it will be necessary to install a new gasket. Refer to
instructions on page 6.
Vapor leakage
from the valve
body outlet. Visual, audible or
vapor detector Leakage can occur at the valve body seat - FEP film interface;
other leak paths are the swivel seal or a torn actuator
diaphragm. After removing the upper actuator housing, lift the
pallet assembly off the seat and inspect for damage to the film
or foreign debris buildup on the seat or film. Clean or replace
the pallet diaphragm as required. Refer to page 6.
Vapor leakage
between the
valve body and
tank nozzle Visual, audible or
vapor detector Leakage between the flanges may be corrected by tightening
the fasteners. Follow mounting instructions listed on page 4.
The gasket may have deteriorated due to the chemical
environment; replace if required. The tank nozzle may be
warped, corroded or scratched. This will require resurfacing of
the flange face; note that a flat faced flange is recommended to
avoid potential damage to an aluminum valve body.
TABLE 8: ABBREVIATIONS
ANSI American National Standards Institute NPT National Pipe Thread
API American Petroleum Institute POV Pilot Operated Valve
BOM Bill of Materials PSIG Pounds/Sq. Inch – Gauge
DPHGM Diaphragm PTFE Fluoropolymer
FEP Fluorocarbon Film (Fluoropolymer) SS Stainless Steel
MAWP Maximum Allowable Working Pressure WC Water Column
MS2 Moly – Disulfide