Product Overview

0
10
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30
40
50
60
70
80
90
100
0
100 200
300 400 500
600 700 800 900
1000
1100 1200
Tme
(sec)
14.5 psi
29 psi
43.5 psi
Airintroduced - Air removed -(%)
4
3
6
5
5
3
4
4
4
3
6
5
5
3
4
4
4
3
6
5
5
3
4
4
4
3
6
5
5
3
4
4
4
3
6
5
5
3
4
4
4
3
6
5
5
3
4
4
F39807
59829
59756
Construction details
DISCAL
®
air separators are designed to allow maintenance and cleaning
without having to remove the valve body from the pipework. All DISCAL
®
air separators (except vertical versions) come standard with a bottom
connection for installing a drain valve. All internal air release control
components are fully accessible in all the models.
The automatic air vent, located at the top of the units, has a long
chamber for the movement of the float. This feature prevents any debris
present in the water from reaching the sealing seat. A stainless steel float
guide pin (3) prevents the float from sticking
due to accumulating residue in the flowing
fluids, even when the DISCAL
®
air separator is
not installed perfectly vertical.
A replacement air vent assembly for the
DISCAL
®
brass 551 series (except vertical
and compact) is code 59829; for the DISCAL
®
steel 551 and NA551 series is code 59756.
The moving parts that control air venting are accessed
simply by removing the upper cover (4). Replacement
cap and float assembly for all versions of the brass
DISCAL
®
551 and NA551 series is code F39807.
When cleaning, simply unscrew the portion of the
body containing the automatic air vent (5). For the
vertical and compact models without a drain, the
element can be removed by removing the upper
cover(4). There is no need to remove the air vent body
for these models.
Air separation efficiency
DISCAL
®
air separators continuously remove entrapped air in hydronic
systems with very high efficiency. The amount of air removed from a
system varies depending on fluid velocity and system pressures. As
illustrated on the graph, after just 25 recirculations at the 3.2 feet per
second fluid velocity, almost all the air artificially introduced into the
circuit is eliminated by the DISCAL
®
air separator, with percent removed
varying based on system pressure and fluid temperature.
The small amount which remains is then gradually eliminated during
normal system operation. In conditions where the fluid velocity is slower
or the temperature of the medium is higher, the amount of air separated
is even greater.