Conversion Table and Oil Heat Terminology

Horsepower X 33,475 = BTU/hr	mm = 0.04 in
Horsepower X 0.299 = GPH	Liter = 0.264 gal
Bar = 14.891 PSI	PSI = 6.9 kPa
BTU/hr = 0.2930 watts
cu. in. = 0.004330279 gal	Watts X .00134 = Horsepower
Ft oil = 0.43 PSI
GPH = 140,000 BTU	Fuel Oil #2 = Spec Gravity .9 / SSU of 50 @ 70°
kPa = 0.145 PSI	Kerosene  = Spec Gravity .82 / SSU of 37 @ 65°
Meter = 3.28 ft
Meter = 1.1 yd	Line Loss Calculator

Units Converter

Motor Derating Chart

To use 60cy Motor on 50cy Operational Voltage

60cy 230v = 190v-200v-208v on 50cy Operation

60cy 460v = 380v-400v-415v on 50cy Operation

60cy 575v = 475v-500v-520v on 50cy Operation

Motor will maintain nameplate horsepower with a 1.0 service factor

Oil Heat Terminology

• Single-stage fuel unit: Unit with one set of gears for both suction and pressure.
• Two-stage fuel unit: Unit with two sets of gears, one for suction and one for pressure.
• One-pipe system: One line, an inlet line from tank to fuel unit.
• Two-pipe: Two lines, one inlet and one return line from tank to fuel unit.
• Bypass plug: Small hex socket head pipe plug used to close internal port and convert unit from one pipe to two pipe operation.
• Bleed: To remove air from a system.
• Lift: Oil drawn from a level below the pump expressed in feet of lift or inches of mercury.
• Head of oil: Column of oil above the fuel unit expressed in psi or feet.
• Inlet port: Port which receives oil from tank.
• Bypass port: Port which discharges surplus oil back to tank in two-pipe systems.
• Return line port: Same as by-pass port.
• Valve differential: Number of pound per square inch the pump pressure must drop from operating pressure to close nozzle valve.
• Delivery: Gallons per hour pumped from the nozzle outlet assembly of the fuel unit.
• Gear set capacity: Total amount of oil being displaced by the pumps gear set(s).

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