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 RING GATE COLLAR
6" 24 26 26
7" 22 22 26
8" 20 20 24
9" 20 20 24


Recommended Pipe Sizes (in.)
Model Control Size Nominal Capacity Sq. In. 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
7" M 7 38.5 6-7-8 19 to 25 1/4 7 5 1/4 3 1/2 3 3/4 7 3/8 2 1/4 8 3/4
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
9" M 9 63.6 8-9-10 25 1/4 to 31 1/2 9 7 1/4 4 1/2 3 3/4 9 5/8 1 29/32 11 3/4


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".
MATERIAL GAUGES
Size RING GATE COLLAR
4" 24 24 26
5" 24 24 26
6" 24 24 26
7" 22 22 26
8" 20 20 26
9" 20 20 26
Recommended Pipe Sizes (in.)
Model Control Size Nominal Capacity Sq. In. 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

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