Groth 7618 - Manual (Page 6)

Page 6 of 16
WARNING: After installation, all connections must be inspected for vapor
leakage. This may be accomplished by static pressure test, gas detector,
or "bubble" test using a liquid leak detector.
III. MAINTENANCE
For maximum operating efficiency the element of a flame arrester must be inspected for clogging at
regular intervals. Frequency of inspection and maintenance should be based on the experience
gained in each application. For ease of service, the flame element housing can be easily removed for
inspection and maintenance without removing the arrester from the line. It is recommended that the
arrester be removed for inspection of the element at least once per year or any time that one of the
following conditions occurs:

Excessive pressure drop is encountered at a known flow rate.

A flame front is detected.
Note:
Flame arresters equipped with a steam jacket can not be serviced in-line. The
arrester must be removed from the pipeline or tank nozzle for inspection and
maintenance.
1. Purge the line or tank with an inert gas before attempting to remove the arrester for maintenance.
CAUTION: The connecting pipeline must be free of all hazardous or flammable vapors before
inspection procedures begin. Before disassembling consult Material Safety Data Sheets
(MSDS) for all products that were exposed to in service. The components should be cleaned
according to MSDS procedures. Take appropriate safety precautions regarding eye protection,
skin contact & respiration.
2. Refer to Fig. 1 which illustrates a typical flame arrester with the element removed.
FIGURE 1 - TYPICAL MODEL 7618 FLAME ARRESTER