Overview of Primary Product
4
3
6
6
3
5
5
4
4
4
A
A
5
4
4
3
6
6
3
5
5
4
4
4
A
A
4
3
6
6
3
5
5
4
4
4
A
A
4
3
6
6
3
5
5
4
4
4
A
A
4
3
6
6
3
5
5
4
4
4
A
A
59829
59756
2
1
3
2
1
3
2
1
A
B
3
2
1
3
4
4
4
4
F39807
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 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), along with a stainless steel float linkage (4) prevents
the float from sticking due to accumulating residue in the flowing fluids,
even when the DISCAL air separator is not installed perfectly vertical.
When cleaning, simply unscrew the portion of the body containing the
automatic air vent (6). For rotating collar and compact models the air
vent body is not removable so the internal mesh element can be pullled
out by removing the upper cover(5).
DISCAL air separators with flanged end connections have an integral
side drain port with brass shutoff drain valve, code 538402 FD (A),
which has two functions:
1. Air removal while filling the system during system commissioning.
2. Debris removal that float within the air separator.
Steel models
Steel flanged models come standard with a side drain valve (A) to drain
large amounts of air when filling the circuit and to remove any debris
present above the water level.
A 1" drain valve (code NA39753) can be connected (B) at the bottom of
the 2" - 6" steel flanged DISCAL to drain collected dirt particles.
551 and NA551 steel series
A replacement air vent assembly for the
DISCAL brass 551 series (except rotating
collar and compact versions) 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
(5). Replacement cap and float assembly for all
versions of the brass DISCAL 551 and 5517 series
is code F39807.