Specification

30 Customer Service: 252.522.3031
Draft
Draft Control
Oil or Coal – Residential and Commercial
The Field RC is furnished as standard equipment on many leading brands of oil or coal-fired heating equipment.
It is calibrated to allow for easy adjustment to the furnace or boiler manufacturer’s specifications. Designed for
settings from .02" to .08", this control is so sensitive that instrumentation should be used when adjusting the unit
during installation.
Specifications
Model
Control
Size
Nominal
Capacity
Sq. In.
Recommended Pipe Sizes (in.) Dimensions (inches)
Dia. Circum. A B C D E G H M
4" RC
4 12.6 3-4-5 9
1
⁄2 to 15
3
⁄4 4 2
1
⁄2 2 2
5
⁄16 4
9
⁄16 1 2
1
⁄2 7
5" RC/RCBT
5 19.6 4-5-6 12
1
⁄2 to 19 5 2
1
⁄2 2 2
5
⁄16 5
9
⁄16 1 2
1
⁄2 7
6" RC/RCBT
6 28.3 5-6-7 15
3
⁄4 to 22 6 1
7
⁄8 3 2 6
5
⁄8 1 2
3
⁄4 7
5
⁄8
7" RC
7 38.5 6-7-8 19 to 25
1
⁄4 7 2
5
⁄8 3
1
⁄2 2
1
⁄2 7
5
⁄8 1 2
3
⁄4 8
5
⁄8
8" RC/RCBT
8 50.3 7-8-9 22 to 28
1
⁄8 8 4
3
⁄8 4 3
3
⁄8 8
11
⁄16 1
1
⁄8 2
5
⁄8 11
9" RC
9 63.6 8-9-10 25
1
⁄4 to 31
1
⁄2 9 5
1
⁄8 4
1
⁄2 3
3
⁄4 9
11
⁄16 1
1
⁄2 2
5
⁄8 12
1
⁄4
Type RC
Material Gauges
Size 4" 5" 6" 7" 8" 9"
RING
22 24 24 22 20 20
GATE
24 24 24 24 20 20
COLLAR
26 26 26 26 26 26
RC RCBT*
*RCBT is recommended for wood and coal burning applications or anytime black pipe is preferred.