Product Overview | Light Oil Pump
8564 Direct Drive Pumps for light oil (30-100 SSU) include TEFC motors and integral relief valves that are factory set at 135 psi but can be field adjusted. Outlet pressure must not exceed 250 psi. Capacity increases with reduced downstream pressure due to less slippage of oil past the pump gears. Select a pump with a rating 1.5 to 2 times maximum system firing rate. Several systems can be used for oil pressure control. The preferred loop system uses an external relief valve to control oil pressure, sending excess oil back to the pump inlet or the tank. It facilitates purging air from the system. The internal relief valve opens only if discharge pressure rises above 135 psi due to malfunction of the external relief valve. The simplest system (not recommended by North American) is dead end. It uses a pressure regulator between pump and burner. The integral relief valve controls pressure to the regulator, which reduces it to burner requirements. This system uses a minimum of piping, but purging can be difficult.
The pumps have mechanical seals and should be located so lift is as small as possible, not exceeding 20 feet including friction losses in pipe and fittings. Oil pumps for larger capacities for heavy oil or for 50 hertz operations are available on special order - consult North American. The oil pump set price does not include the starter switch or heaters. Please see sheet 8564-3 for the starter switch and heaters selection chart, if these items are required. These parts must be listed separately on the order and will ship as loose items with the pump set. They are not mounted or wired to the pump set assembly. These pumps are supplied with dual voltage motors. It is important that the installer review the directions on the motor for appropriate wiring configurations for voltage and rotation.
8564 PUMP SPECIFICATIONS
Integral Relief Valve setting, psi
gph
70 psi †
38 100 125 psi †
35 psi †
Pump
38 100
38 100 SSU SSU
Pipe Motor Motor
Start
Full
wt, lb
designation SSU SSU SSU SSU
size
hp
rpm to Open Open complete
8564-1.5 8564-3.5
81
108
96 114 186 198
108
117
½ " ½ "
1800 1800
135 135
160 160
53 60
1⁄3 ½
168 190
198 204
ROTATION
DIMENSIONS inches
17⁄32 dia. 4 holes
½ pipe size
15⁄16
15⁄16
Coupling guard
Suction
Discharge
8 ½ ‡
Relief Valve
2
8 ½
7⁄8
5
1 ½
17 ½
10
19
BASE DIMENSIONS
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.
To order, specify: 8564-1.5 (or 3.5) - (1 for single phase, 3 for three phase) Oil Pump.
† Set by system relief valve--not the integral pump relief valve. ‡ Add 2" for single phase motor because of capacitor on top (see photo).
Bulletin 8563/64 Page 2
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