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USING CHART A

  1. Select Separator Size from Chart "A" by matching your Operating Pressure and Bottom Blowdown Valve Size. The largest size valve and highest pressure should be used for multiple boilers.
  2. From Chart "A" read the height "H" of the separator, "I" the inlet size to match blowdown valve size, "D" the drain and "V" atmospheric steam vent recommended sizes. All connections come standard as NPT. Flanges are optional.
  3. All Separators are 14" in diameter and are ASME Code "UM" designed and stamped for 250 psig at 450 deg. F. Select plate thickness of 5/16" or 3/8" as local regulations required. Add for National Board "U" Stamping when required. Flanged units are limited in pressure to flange rating and would be stamped accordingly.
  4. The separator size is now determined and the piping can follow these sizes. Separators are designed to quietly exhaust steam to atmosphere at 90 dB(A) or less and operate at a pressure of less than 5 psig. Drain sizing includes cooling water required for 140 deg. F. drain temperature. Select cooling valve size from chart "B" .
CHART A– BOILER BLOWDOWN SEPARATORS

Blowdown
Valve Size Separator
Dimensions
Boiler Oper. Pressure
*1"
1-1/4"
1-1/2"
2"
2-1/2"
3"
H
I
D
V
H
I
D
V
H
I
D
V
H
I
D
V
H
I
D
V
H
I
D
V
0-15
14
1
2
2-1/2
20
1-1/4
3
4
20
1-1/2
3
4
20
2
4
5
34
2-1/2
5
6
34
3
6
5
16-50
20
1
2
2-1/2
20
1-1/4
3
4
34
1-1/2
3
4
34
2
4
5
34
2-1/2
5
6
34
3
6
5
51-100
20
1
3
2-1/2
34
1-1/4
4
4
34
1-1/2
4
4
34
2
5
5
34
2-1/2
6
6
34
3
8
8
101-125
34
1
3
3
34
1-1/4
4
4
34
1-1/2
4
4
34
2
5
5
56
2-1/2
6
6
126-150
34
1
3
3
34
1-1/4
4
4
34
1-1/2
4
5
56
2
5
6
56
2-1/2
6
6
151-175
34
1
3
3
34
1-1/4
4
4
34
1-1/2
4
5
56
2
5
6
56
2-1/2
6
8
176-200
34
1
3
3
34
1-1/4
4
5
56
1-1/2
5
5
56
2
6
6
56
2-1/2
6
8
201-225
34
1
4
4
56
1-1/4
4
5
56
1-1/2
5
5
56
2
6
6
56
2-1/2
8
8
226-300
56
1
4
4
56
1-1/4
4
5
56
1-1/2
5
5
56
2
6
8
56
2-1/2
8
8
*Miniature Boilers: 1/2"-1" Blowdown Valve up to 1000#/hr Blowdown use 14" High, 1" Inlet, 2" Drain, 2-1/2" Vent.
For Boilers above 300 PSIG see Selector Chart H.