Field Controls SWG-3 - Page 32

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DRAFT
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".
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.
MG-1
ABCDEFGHIJKLM
MATERIAL GAUGES
SIZE 6" 8"
RING
24 20
GATE
26 20
COLLAR
26 24
SPECIFICATIONS
MODEL
CONTROL
SIZE
NOMINAL
CAPACITY
SQ. IN.
RECOMMENDED
PIPE SIZES (IN.)
DIMENSIONS (INCHES)
DIA. CIRCUM. A B C D E G M
6" M
6 28.3 5-6-7 15
3
⁄4 to 22 6 5 3 3
1
⁄4 6
17
⁄32 2 8
8" M
8 50.3 7-8-9 22 to 28
1
⁄4 8 6
3
⁄8 4 3
3
⁄8 8
5
⁄8 3 10
3
⁄8
SPECIFICATIONS
MODEL
CONTROL
SIZE
NOMINAL
CAPACITY
(SQ. IN.)
RECOMMENDED
PIPE SIZES (IN.)
DIMENSIONS (INCHES)
DIA. CIRCUM. A B C D E F G H J K L M
4" MG1
4 12.6 3 - 4 9
1
⁄2 to 12
1
⁄2 4 2
1
⁄2 2 2
5
⁄16 4
9
⁄16 1
1
⁄2
1
⁄4 2
1
⁄2
1
⁄2 1
1
⁄4
3
⁄8 7
5" MG1
5 19.6 4 - 5 12
1
⁄2 to 15
3
⁄4 5 2
1
⁄2 2 2
5
⁄16 5
9
⁄16 2
5
⁄8 2
1
⁄2
1
⁄2 1
1
⁄4
1
⁄2 7
6" MG1
6 28.3 5 - 6 15
3
⁄4 to 19 6 2
11
⁄16 3 3
1
⁄4 6
5
⁄8 2
1
⁄8
13
⁄16 2
3
⁄4
3
⁄4 1
3
⁄4
5
⁄8 8
7
⁄16
7" MG1
7 38.5 6 - 7 19 to 22 7 3
3
⁄8 3
1
⁄2 3
3
⁄4 7
5
⁄8 2
3
⁄8 1
1
⁄8 2
3
⁄4
3
⁄4 2
1
⁄4 9
5
⁄8
8" MG1
8 50.3 7 - 8 22 to 25
1
⁄4 8 4
3
⁄8 4 3
3
⁄8 8
11
⁄16 3 1
1
⁄2 2
5
⁄8
3
⁄4 2
1
⁄4
3
⁄8 11
9" MG1
9 63.6 8 - 9 25
1
⁄4 to 28
1
⁄4 9 5
1
⁄8 4
1
⁄2 3
3
⁄4 9
11
⁄16 3
1
⁄2 1
3
⁄4 2
5
⁄8
3
⁄4 2
1
⁄2
3
⁄8 12
1
⁄4
MATERIAL GAUGES
SIZE 4" 5" 6" 7" 8" 9"
RING
24 24 24 22 20 20
GATE
24 24 24 22 20 20
COLLAR
26 26 26 26 26 26
ABCDEFGHIJKLM
M
DRAFT CONTROL