Dimensions | Air/Oil Ratiotrols
YES
NO
When installing North American 7052 equipment please follow the diagram to the right.
5 pipe dia. minimum 3 pipe dia. minimum
air
impulse line
Control valve
Main air valve
air
spring adjustment
Air control valve
to burners
Atomizing air valve
Air/Oil Ratiotrol
install tee for checking impulse pressure Oil strainer oil at 25 to 30 psi
Accumulator vent
Air/Oil Ratiotrol
Burner Sensitrol
to burners
Gauges and Gauge Cocks
return line to circulating loop (heavy oil only)
Thermometer
Accumulator
Strainer
oil
Figure 1. Piping of Ratiotrol used for several burners on light or heavy oil, or single burner on heavy oil.
Figure 2. Arrangement for burning light oil with a separate Ratiotrol for each burner.
DIMENSIONS inches
10 ¾ dia.
7 ½ dia.
¼ FNPT for optional 8735-60I
air gauge 0-60"w.c.
¼ FNPT vent
15 9⁄16 max.
2 11⁄16
5 3⁄32
10 ¾
5 13⁄16
¼ FNPT for air impulse line (optional 8735-60I air gauge 0-60"w.c.)
¼ FNPT for air line
4 ¾
¾ FNPT
¾ FNPT
1⁄8 FNPT for optional 8735-B Oil inlet gauge, 0-60 psi†*
¼ FNPT vent
1⁄8 FNPT for optional 8735-A Oil outlet gauge, 0-30 psi †* ½ FNPT 1 3⁄8 2 11⁄16
¼ FNPT for optional 8735-100P-B Oil inlet gauge, 0-100 psi †*
3 9⁄16
½ FNPT
1 15⁄16
¼ FNPT for optional 8735-30P-B Oil outlet gauge, 0-30 psi*†
6
6
½ FNPT for optional 8737-C Thermometer, 50-300 F †
1 11⁄16
1 11⁄16
3⁄8 sq. hd. pipe plug
1 sq. hd. pipe plug
7052-01 (wt. 7 lb)
7052-0 (wt. 24 lb)
Ratiotrols™ must be mounted horizontally, and diaphragm case should be above the pipe.
See photograph on front for actual vent and impulse locations. Thermometer and gauges not standard equipment. † On both sides of body. * Gauges shall be isolated from pulsation damage during operation of the burner system with the use of 1836-04 gauge cocks on -01 and 1836-03 on -0 size.
DIMENSIONS SHOWN ARE SUBJECT TO CHANGE. PLEASE OBTAIN CERTIFIED PRINTS FROM FIVES NORTH AMERICAN COMBUSTION, INC. IF SPACE LIMITATIONS OR OTHER CONSIDERATIONS MAKE EXACT DIMENSION(S) CRITICAL .
Bulletin 7052 Page 3
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