Overview of Primary Product

65
Boiler Controls
McDonnell & Miller
Boiler Controls
A B C D E F GH
NPT
8
1
⁄2 (216) 3
5
⁄16 (84) 5
5
⁄8 (143) 8
13
⁄16 (224) 4
3
⁄4 (121) 6
1
⁄4 (159)
3
⁄4 7
3
⁄8 (186)
• For boiler receiver tanks
• Direct mounting eliminates need for equalizing
connections
• Proportional feed action
• Mounting Flange – six
7
⁄16" (11.1mm) bolt holes on a 5
3
⁄4"
(146mm) bolt circle
• Soft seat provides positive seal
• Maximum water supply pressure 150 psi (10.5 kg/cm
2
)
• Maximum inlet water temperature 120˚F (49˚C)
• Maximum vessel pressure 35 psi (2.5 kg/cm
2
)
Series 21
CD
E
B
F
A
G
H
Water Feeders – Make-Up
Series 21
Make-Up Water Feeder
Dimensions, in. (mm)
Series 221
Series 221
Make-Up Water Feeder
• For boiler receiver tanks
• Direct mounting eliminates need for equalizing
connections
• Proportional feed action
• Mounting Flange – six
17
⁄32" (13.5mm) bolt holes on a 8
1
⁄2"
(216mm) bolt circle
• Soft seat provides positive seal
• Maximum water supply pressure 150 psi (10.5 kg/cm
2
)
• Maximum inlet water temperature 120˚F (49˚C)
•
Maximum vessel pressure 35 psi (2.5 kg/cm
2
)
Dimensions, in. (mm)
®
WATER SUPPLY PRESSURE IN LBS. PER SQ. IN.
CAPACITY CURVE
lbs./hr.
BOILER
psi
(kg/hr.)
1301201101009080706050403010
16,000
15,000
14,000
13,000
12,000
11,000
10,000
9,000
8,000
7,000
6,000
5,000
4,000
3,000
2,000
1,000
0
(7258)
(6804)
(6350)
(5897)
(5443)
(4990)
(4536)
(4082)
(3629)
(3175)
(2722)
(2268)
(1814)
(1361)
(907)
(454)
(0)
(0.7) (1.4) (2.1) (2.8) (3.5) (4.2) (4.9) (5.6) (6.3) (7.0) (7.7) (8.4) (9.1) (9.8)(10.5)
200
(0)
140 150
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
0
(121.12)
(113.55)
(105.98)
(98.41)
(90.84)
(83.27)
(75.70)
(68.13)
(60.56)
(52.99)
(45.42)
(37.85)
(30.28)
(22.71)
(15.14)
(7.57)
(0)
(kg/cm
2
)
gpm
(lpm)
464
435
406
377
348
319
290
261
232
203
174
145
116
87
58
29
0
(4549)
(4264)
(3980)
(3696)
(3411)
(3127)
(2843)
(2559)
(2274)
(1990)
(1706)
(1421)
(1137)
(853)
(569)
(284)
(0)
hp
(Kilowatts)
Capacities
H
CD
E
B
F
A
G
Ordering Information
Model
Part
Weight
Number Number Description lbs. (kg)
21 126400 Make-up water feeder 15.3 (6.9)
221 126600 Make-up water feeder 21.3 (9.7)
AB CD E F GH
NPT
8
1
⁄2 (216) 4
11
⁄16 (84) 5
5
⁄8 (143) 8
13
⁄16 (224) 4
3
⁄4 (121) 6
1
⁄4 (159)
3
⁄4 (20) 9
1
⁄2 (241)