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APV standard 'P' types offer
AISI 316 stainless steel plates
and connections
with copper brazing. The units
are rated for 450 psig/31 bar
operating pressure with a maximum
temperature of 437°F/225°C.
P series are typically installed
with a Y-strainer to protect
the unit from debris, while
custom insulation kits minimize
ambient losses.
A principal system design includes
a primary heat source (i.e.
boiler) and a secondary loop
such as snowmelt or radiant
circuit. Sanitary instant hot
water can also be produced from
this system with the use of
appropriate controls. Due to
the low internal volume of the
brazed exchanger, instant hot
water is possible in many cases
eliminating the need for thermal
storage tanks.
Inherent of their turbulent
flow, brazed plate heat exchangers
resist particulate fouling and
scaling. Units can be cleaned
using a phosphoric or citrus
acid solution circulated in
reverse at 1.5 times the normal
fluid flow rate. Replacing bulky
shell and tube, coiled, coaxial
and other less efficient heat
exchangers, brazed plates have
allowed system designers not
only to think outside the box,
but also to make the box smaller
- pushing the boundaries of
system design.
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