16 | INSTALLATION, OPERATION and MAINTENANCE MANUAL
Sanitary GPHE’s are equipped with adjustable ball feet, which provide a point contact,
for levelling the plate heat exchanger to ensure the GPHE can fully drain. A sanitary
GPHE that can be fully drained meets one of the requirements for stamping a GPHE
with the 3-A logo.
Some of the small sanitary GPHE’s do not have adjustable ball feet and are only offered
with industrial type feet. These GPHE’s can be sold with a 3-A logo provided the
following conditions are met for leveling and sealing of the flat feet:
1) If the GPHE is mounted on an adjustable skid unit, the skid unit must be leveled
such that the GPHE can fully drain.
2) If the GPHE is not mounted on an adjustable skid unit, the GPHE must be
mounted on a surface(s) that render the GPHE level such that it can fully drain
(eg: in the case of a sloping floor, the GPHE should be mounted on raised
supports whose top surfaces are coincident with each other).
3) The full perimeter of the feet/pads must be sealed such that liquid ingress is
prevented for GPHE’s provided with flat mounting pads (feet). This requirement
is applicable regardless of the mounting surface such as a skid framework,
raised supports or the floor.
When plate heat exchangers are opened for maintenance, the follower moves back
along the top bar to allow full access to each individual plate. Divider plates and
connector grids also move freely on the top carrying bar to provide easy access to
individual plates.
APV frames used in industrial duties are fabricated in carbon steel and are finished with
a heavy duty chemical resistant paint. Industrial frame connections may be studded with
various lining materials or nozzles. The nozzles are fabricated in carbon steel, stainless
steel, or alternate metals. Connection types may be weld neck or specialty flanges.
Sanitary unions may also be supplied on carbon steel frames. The connection materials
and types may be mixed on an individual frame.
Frames used for sanitary duties are fabricated in solid stainless steel or carbon steel
that is entirely clad with stainless steel (Figure 5). The finish is either a number 4 polish
or glass bead blast depending on the model. Standard connections are sanitary unions
at all locations. Industrial fittings may be supplied when required.
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