Product Overview

1000
Efficiency
50 passages (1.6 f/s)
50 20 10
40
20
0
60
80
100
Efficiency (%)
Efficiency
50 passages (3.2 f/s)
Micro
particle
(
Δm)
0
5
16 35 63
105 150 250 210 500
Separated quantity
Initial quantity
.
100%
(
)
DIRTCAL
WORKING ZONE
CARTRIDGE FILTER
SPECIAL FILTER
Y-STRAINERS
CHILLER
Tmax 110¯C
P
max 10 bar
Tmax 105¯C
P
max 10 bar
BI-DIRECTIONAL
Tmax 110¯C
P
max 10 bar
Tmax 105¯C
P
max 10 bar
BI-DIRECTIONAL
Tmax 110¯C
P
max 10 bar
Tmax 105¯C
P
max 10 bar
BI-DIRECTIONAL
Tmax 110
¯
C
P
max 10 bar
Tmax 105
¯
C
P
max 10 bar
BI-DIRECTIONAL
Particle separation capacity — dirt separator efficiency Separation efficiency
The capacity for separating the dirt in the medium circulating in the
closed circuits of the hydronic systems depends on three factors:
1. It increases as the size and mass of the dirt particle increases.
Thelarger and heavier dirt particles drop before the lighter ones.
2. It increases as the fluid velocity decreases. If the velocity decreases,
there is a low-velocity-zone inside the dirt separator and the dirt
particles separate more easily.
3. It increases as the number of recirculations increases. The medium
in the circuit, flowing through the dirt separator a number of times
during operation, is subjected to a continuous separation, until the
dirt particles are completely removed.
The special design of the internal mesh element in the Caleffi DIRTCAL
®
dirt separator, is able to completely separate the dirt particles in
the circuit down to a minimum particle size of 5 μm (0.2 mil). The
adjacent graph illustrates how DIRTCAL
®
quickly separates nearly all
the dirt particles. After only 50 recirculations, approximately one day
of operation, up to 100% is effectively removed from the circuit for
particles of diameter greater than 100 μm (3.9 mil) and on average up
to 80% taking account of the smallest particles. The continual passing
of the medium during normal operation of the system gradually leads to
complete dirt removal.
Installation
The dirt separator must always be installed in a vertical position,
preferably on the return circuit upstream of the boiler (or chiller).
This enables it to intercept dirt particles already present in the circuit,
particularly when it is first started, before they reach the boiler (orchiller).
Flow direction for the DIRTCAL
®
and DIRTMAG
®
dirt separators is
bidirectional, flowing in either direction is permitted.
Reduced head losses
A normal Y strainer performs its function via a metal mesh selected
for the size of the largest particle. The medium therefore has a
consequent initial loss of head that increases as the degree of
clogging increases.
The DIRTCAL
®
dirt separator, however, removes the particles striking
the internal mesh element and subsequently drop into the collection
chamber. The consequent head losses are greatly reduced and are not
affected by the amount of dirt collected.