Brochure

Installation
DISCAL units may be used in
heating or cooling systems, to
ensure the progressive removal
of air which is continuously
formed. The units should
preferably be installed after the
boiler and on the pump suction
side, as these are the points
where the formation of micro-
bubbles is
greatest. DISCAL air
separators must be installed
vertically. In installation
conditions where inspection is
not possible, it is
recommended that the venting
valve cap is replaced by a
Caleffi Code R59681
hygroscopic safety vent. The
standard replacement cap
code number is 59119.
G (l/s) (gpm)
( kPa )
3/4" 1" 1 1/4" 1 1/2" 2” Steel 2 1/2” 3” 4” 3/4" C 5” 6” 2”
0. 1
0. 05
0.09
0.08
0.07
0.06
0.035
0.04
0.045
0.12
0.14
0.16
0.18
0.25
0.3
0.35
0. 2
1 ,0
0 ,10
0 ,20
0 ,5
0,9
0,8
0,7
0,6
0,12
0,14
0,16
0,18
0,25
0,30
0,35
0,40
0,45
1,2
1,4
1,6
1,8
2,5
3
2 ,0
1
0. 5
0.9
0.8
0.7
0.6
0.45
0.4
0,09
0,08
0,07
0,06
0.025
0.03
0. 0 2
( ft of wtr ) ∆ P ( ft of wtr )
100
2
10
5
20 50
10
0
0
200 500
0. 1
0. 05
0.09
0.08
0.07
0.06
0.035
0.04
0.045
0.12
0.14
0.16
0.18
0.25
0.3
0.35
0. 2
1
0. 5
0.9
0.8
0.7
0.6
0.45
0.4
0.025
0.03
0. 0 2
6 7 8 9
12 14 16 18 25 3
0
35 4
0
45 6
0
70 80 90
120
140
160
180 250 400
45
0
300
35
0
600
7
00
8
00
9
00
3
3.5
4
4.5 2.5
2
0,5
10
1 5
0,6 0,7 0,8 0,9 1,2 1,4 1,6 1,8 2,5
3
3,5
4
4,5
6 7 8 9
12 14 16 18 25 40 45
20
30 35
50
60 70
0,25
0,40 0,45
0,20
0,30 0,35
Hydronic characteristics
The fluid velocity at connections for Discal 551 series air separators is
recommended to not exceed 10.0 f/s. Above this speed, heavy internal
turbolance and noise can occur and air elimination efficiency begins to fall
measurably. Optimal air elimination performance occurs at fluid velocities of
4.0 f/s or less. See the flow capacity chart.
CHILLER
We reserve the right to change our products and their relevant technical data, contained in this publication, at any time and without prior notice.
Caleffi North America, Inc.
3883 West Milwaukee Road / Milwaukee, WI 53208
Tel: [phone] / Fax: [phone] / www.caleffi.us
© Copyright 2010 Caleffi
CALEFFI
DISCAL Series 551 - Compact
Air separator in brass. Connections 3/4" NPT F threads or 3/4” sweat. Bottom 1/2” NPT F for drain. Brass body. EPDM seal.
Internal mesh element of stainless steel, removable for cleaning operations. Maximum working pressure, 150 psi (10 bar).
Temperature range 32 to 250°F (0 to 120°C). Glycol maximum 50%.
DISCAL Series 551
Air separator in brass. NPT threaded connections from 3/4" F to 2" F. Bottom connection 1/2" NPT F for drain. Sweat
connections 1”, 1 1/4”, 1 1/2", and 2". Brass body. EPDM seal. Internal mesh element of PA66G30, removable for cleaning
operations. Maximum working pressure, 150 psi (10 bar). Temperature range 32 to 250°F (0 to 120°C). Glycol maximum 50%.
DISCAL Series 551 (Flanged)*
Air separator in steel. Bottom male 1" NPT for drain. Flanged 150 CLASS ANSI connections from 2” to 6”. Body of epoxy
resin painted steel. EPDM seal. Internal mesh element of stainless steel. Maximum working pressure, 150 psi (10 bar).
Temperature range 32 to 250°F (0 to 120°C). Glycol maximum 50%.
DISCAL Series 551 (Threaded)*
Air separator in steel. Bottom male 1" NPT for drain. Threaded connections from 2” NPT M to 4” NPT M. Body of epoxy
resin painted steel. EPDM seal. Internal mesh element of stainless steel. Maximum working pressure, 150 psi (10 bar).
Temperature range 32 to 250°F (0 to 120°C). Glycol maximum 50%.
*
Flanged series NA551 and all steel threaded series are designed and built in accordance with Section VIII, Division 1 of the ASME
Boiler and Pressure Vessel Code and tagged and registered with the National Board of Boiler and Pressure Vessel Inspectors.
SPECIFICATION SUMMARIES
Accessories
Check valve code 561402A for expansion
tanks. 1/2” NPT connections.
Hygroscopic safety vent cap code R59681.
Small anti-vacuum vent cap code 562100.
Replacement Discal air vent cap code 59119.
Optimal
(4.0 f/s)
FLOW CAPACITY
BRASS STEEL
3/4” C
6.0
0.4
14.3
0.9
11.6
3/4”
8.0
0.5
19.0
1.2
19.1
1”
9.3
0.6
22.1
1.4
32.5
1 1/4”
15.3
1.0
36.4
2.3
56.4
1 1/2”
23.9
1.5
56.8
3.6
73.1
2”
36.1
2.3
86.0
5.4
81
2”
37.3
2.4
88.8
5.6
87
2 1/2”
63.0
4.0
150.1
9.5
174
3”
95
6.0
227.4
14.3
208
4”
149
9.4
355.3
22.4
324
5”
259
16.3
616.4
38.9
520
6”
380
24.0
903.6
57.0
832
Size
GPM
l/s
GPM
l/s
Cv
Max.
(10.0 f/s)