Submittal Sheet

FIELD CONTROLS, LLC - CONTRACTOR PRODUCTS DRAFT CONTROLS
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 recom-mended 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".
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