Brochure

6
Draft Control
Solid, Oil or Gas Commercial/Industrial
This is a series of compact, rugged, heavy-duty controls for use on
large residential, commercial, and industrial applications. The Field
Type M+MG2 Draft Control provides precise draft regulations for solid
fuels, oil, gas, or oil/gas appliances requiring only the simplest, on-the-
job adjustments depending on which fuel is to be utilized. In a gas
installation, the double-acting Type M+MG2 is specified instead of a
draft hood to give the appliance the assistance of the chimney. In a
duel fuel oil/gas or a gas-fired only application, use the M+MG2 as a
double-acting draft control with the optional Field Thermal Switch
accessory. Use the M+MG2 as a single-acting draft control for oil or
solid fuel applications. For any installation with 10" or larger diameter
smoke pipe, specify our standard M+MG2 Draft Control, the unit that
can be adapted to any fuel. The moving part (gate) rests on a long,
thin, stainless steel knife edge which, in turn, is supported by self-
aligning and self-cleaning bearings. When the heavy gauge gate
moves, only the knife edge rests on the bearing for minimum friction
and maximum sensitivity to draft changes.
* CSA certified
** An increaser or reducer may be necessary in order for the Barometric Draft Control to adapt to off-sized pipe.
MATERIAL GAUGES
US
Type M+MG2
Size 10" 12" 14" 16" 18" 20" 24" 28" 32"
RING 20 20 20 18 18 18 18 16 16
GATE 18 16 16 16 16 16 14 14 14
COLLAR 24* 24* 22* 20* 20* 18* 18* 14** 14**
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
10" M+MG2* 10 78.5 9 - 10 28
1
⁄4 to 31
1
⁄2 10 4
3
⁄8 5 4
1
⁄4 11 3
3
⁄8 1
1
⁄8 4
3
⁄4 1 3
1
⁄2 1 14
1
⁄8
12" M+MG2* 12 113 11 - 12 34
1
⁄2 to 37
3
⁄4 12 5
3
⁄4 6 5 13
1
⁄4 4
5
⁄8 1
3
⁄4 4
3
⁄4 1 3
1
⁄2
7
⁄8 16
1
⁄2
14" M+MG2* 14 154 13 - 14 40
3
⁄4 to 44 14 7
1
⁄8 7 5
3
⁄4 15
1
⁄2 5
3
⁄8 2
1
⁄8 5
1
⁄8 1 3
1
⁄2
5
⁄8 19
1
⁄4
16" M+MG2 16 201 15 - 16 47 to 50
1
⁄4 16 8
3
⁄8 8 6
1
⁄2 17
1
⁄2 6
1
⁄8 2
3
⁄8 5
5
⁄8 1
1
⁄2 4
5
⁄8 22
18" M+MG2 18 255 17 - 18 53
1
⁄2 to 56
1
⁄2 18 8
1
⁄4 9 7
1
⁄2 19
1
⁄2 6
7
⁄8 2
3
⁄4 7
3
⁄8 1
1
⁄2 5
1
⁄4 1
5
⁄8 24
5
⁄8
20" M+MG2** 20 314 19 - 21 59
3
⁄4 to 66 20 9
5
⁄8 10 8
1
⁄8 22 7
5
⁄8 3 7
3
⁄4 1
1
⁄2 6
1
⁄4 1
1
⁄4 27
3
⁄8
24" M+MG2** 24 452 22 - 25 69 to 78
1
⁄2 24 12
3
⁄8 12 10
1
⁄2 26 9
1
⁄4 3
5
⁄8 8
5
⁄8 2 6
1
⁄4 1
1
⁄4 33
28" M+MG2** 28 616 26 - 30 81
3
⁄4 to 94
1
⁄4 28 13
1
⁄8 14 - 30
1
⁄2 10
3
⁄4 4
1
⁄8 11
3
⁄8 2 6
1
⁄4
7
⁄8 38
1
⁄2
32" M+MG2** 32 804 31 - 34 97
1
⁄2 to 107 32 15
3
⁄8 16 - 35 12
1
⁄4 4
3
⁄4 12
1
⁄8 2 6
1
⁄4
5
⁄8 43
1
⁄2
* Galvanized **HRPO with Enamel Finish
M+MG2