INSTALLATION, OPERATION and MAINTENANCE MANUAL | 11
a. Leakage from an APV DuoSafety plate is always the early warning for the user
to act. (See page 23)
b. Do not exceed the maximum operating pressure or temperature listed on the
customer drawing or damage to the heat exchanger and personnel serious
injury or death may result. (See page 38)
c. Lifting from the follower is not permitted since plate damage may occur. (See
page 41)
d. Never tighten a GPHE which is under pressure. (See page 46)
e. Never tighten a GPHE while piping is connected to the follower or connector
grids. (See page 46)
f. Refer to the plate arrangement diagram for the maximum compressed
dimension of the plate pack. (See page 47)
g. Never open a GPHE until the equipment is below 38ºC (100ºF). (See page 48
and 55)
h. Never open a GPHE which is under pressure. (See page 48)
i. Never open a GPHE while piping is connected to the follower or connector
grids. (See page 48 and 55)
j. Ozone-producing equipment, salt air and other corrosive atmospheres must be
avoided. (See page 49)
k. The plate pack must be tightened to the correct pitch before commencing
operation. Use the maximum pitch when new plates and gaskets are installed.
For all other conditions, tighten the plate pack to the previous plate pack
dimension and if leaks occur then reduce the plate pack dimension in small
steps. Never tighten the heat exchanger below the minimum pitch. (See page
49)
l. Correct assembly and tightening are required for safe startup and operation.
(See page 50)
m. The heat exchanger must never be started or operated with a closed valve in
the outlet piping. Any such operation can cause leakage and irreversible
damage. (See page 50)
n. As for any bolted vessel, bolts must not be slackened or tightened
indiscriminately. Use a sequence that balances the opening on the right and left
sides of the heat exchanger throughout the process. (See page 56)
o. During maintenance, secure the follower to the end support to prevent
accidental rolling. (See page 57)
p. Do not use any chlorine-containing agents as this will attack the heat
transfer plate. (See page 60)
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