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TYPE M
Oil or Coal - Residential
The M control lends itself ideally to conditions requiring
a great deal of stability and accuracy. Designed
for settings from .01" to .1", the Field M Control is
recommended for oil or coal-fired residential heating
applications. The Type M features an infinitely
variable screw adjustment, permitting an extremely
fine instrument setting. The M employs side wings to
control air direction with gate curvatures designed to
compensate for differences in horizontal and vertical settings.
MATERIAL GAUGES
SIZE
6"
8"
RING
24
20
GATE
26
20
COLLAR
26
24
TYPE MG-1
Gas
A double-acting control for gas-fired furnaces
and boilers is widely used for conversion
burner installations, gas draft-induced
appliance operation with mechanical draft
inducers, or sidewall power venters. It is also
recommended for use on gas atmospheric
appliances where a draft hood cannot
be installed, and can improve combustion
stability and draft on many gas atmospheric
installations with venting problems. The MG-1
provides precise, accurate control of drafts at levels higher than permitted by a
standard draft diverter, which is a frequent requirement with gas. Because it is
double-acting, it opens out to relieve positive vent system pressures as low as
.01". Draft adjustments using weights are simple and accurate from .01" to .1".
NOMINAL
CONTROL
MODEL
CAPACITY
SIZE
DIA.
(SQ. IN.)
4" MG-1
4
12.6
3 - 4
5" MG-1
5
19.6
4 - 5
6" MG-1
6
28.3
5 - 6
7" MG-1
7
38.5
6 - 7
8" MG-1
8
50.3
7 - 8
9" MG-1
9
63.6
8 - 9
Technical Service:
800.742.8368 •
NOMINAL
CONTROL
MODEL
CAPACITY
SIZE
SQ. IN.
6" M
6
28.3
8" M
8
50.3
MG-1
SPECIFICATIONS
RECOMMENDED
PIPE SIZES (IN.)
CIRCUM.
A
B
9
⁄
to 12
⁄
4
2
⁄
1
1
1
2
2
2
12
⁄
to 15
⁄
5
2
⁄
1
3
1
2
4
2
15
⁄
to 19
6
2
⁄
3
1 1
4
16
19 to 22
7
3
⁄
3
8
22 to 25
⁄
8
4
⁄
1
3
4
8
25
⁄
to 28
⁄
9
5
⁄
1
1
1
4
4
8
fieldcontrols.com
DRAFT CONTROL
ABCDEFGHIJKLM
M
SPECIFICATIONS
RECOMMENDED
PIPE SIZES (IN.)
DIA.
CIRCUM.
A
5-6-7
15
⁄
to 22
6
3
4
7-8-9
22 to 28
⁄
8 6
1
4
SIZE
RING
GATE
COLLAR
DIMENSIONS (INCHES)
C
D
E
F
G
2
2
⁄
4
⁄
1
⁄
⁄
5
9
1
1
16
16
2
4
2
2
⁄
5
⁄
2
⁄
5
9
5
16
16
8
3
3
⁄
6
⁄
2
⁄
⁄
1
5
1
13
4
8
8
16
3
⁄
3
⁄
7
⁄
2
⁄
1
⁄
1
3
5
3
1
2
4
8
8
8
4
3
⁄
8
⁄
3
1
⁄
3
1 1
1
8
16
2
4
⁄
3
⁄
9
⁄
3
⁄
1
⁄
1
3
1 1
1
3
2
4
16
2
4
ABCDEFGHIJK
DIMENSIONS (INCHES)
B
C
D
E
G
M
5
3
3
⁄
6
⁄
2
8
1
17
4
32
⁄
4
3
⁄
8
⁄
3
10
3
3
5
8
8
8
MATERIAL GAUGES
4"
5"
6"
7"
8"
9"
24
24
24
22
20
20
24
24
24
22
20
20
26
26
26
26
26
26
H
J
K
L
M
2
⁄
⁄
1
⁄
⁄
7
1
1
1
3
2
2
4
8
2
⁄
⁄
1
⁄
⁄
7
1
1
1
1
2
2
4
2
2
⁄
⁄
1
⁄
⁄
8
3
3
3
5
7
4
4
4
8
2
⁄
⁄
2
⁄
9
3
3
1
4
4
4
2
⁄
⁄
2
⁄
⁄
1 1
5
3
1
3
8
4
4
8
2
⁄
⁄
2
⁄
⁄
12
5
3
1
3
8
4
2
8
31
⁄
3
8
⁄
16
⁄
5
8
⁄
1
4
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