Brochure

4
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.
MATERIAL GAUGES
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/RCBT 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/RCBT 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/RCBT 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
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
Draft Control
RC
RCBT*
*RCBT is recommended for wood and coal burning applications or anytime black pipe is preferred.