Preferred Utilities Manufacturing Corp.

1. Preferred Utilities Manufacturing Corp. Fuel Oil Sizing Program Overview Preferred Utilities Manufacturing Corporation 31-35 South St. • Danbury • CT www.preferred-mfg.com

2. Introduction • PC Based Program • Sizes Typical Fuel Oil Piping Systems • Helps to determine “workability” of overall application • Helps to sizing suction and discharge piping

3. Day Tank Schematic

4. Determining Pump Capacity • For day tank systems • rate of use vs. duty cycle determines pump flow • length of time without power determines tank size • E-Gen sets – “RULE of THUMB” 7 GPH / 100kw • E-Gen sets - “RULE of THUMB” 4:1 , pump runs 25% of time. • For burner systems • parallel loop, total burning rate plus total return flow • series loop, total burning rate plus return flow of last burner only • Pick pump-motor pair with next greater flow rate • Motor HP based on PSI required

5. Maximum Inlet Suction • Atmospheric pressure (30" Hg) provides the force to get oil into the pump • Most pumps can produce a 20" Hg vacuum • Good practice limits suction to a 15" vacuum or less • Typical piping loss is 5" Hg • This leaves 10" Hg for static lift, or 12' of oil • Pump should not be located more than 12' above the bottom of the tank

6. Determining Inlet Suction • Suction at pump inlet • Add gravity head plus: • Friction losses • Friction loss through suction piping • convert fittings, valves, etc. to equivalent diameters • add total length of pipe to equivalent for fittings • add loss through strainer • Increase pipe size or lower pump to suit

7. Pressure Drop through Pipe Pressure drop through pipe, Number 2 Fuel Oil Flow, Gallons per hour

8. Equivalent Diameters • ball valve, full ported 3 • check valve, lift type 600 • check valve, swing type 100 • foot valve, poppet type 420 • globe valve 340 • gate valve, full ported 8 • plug valve 18 • 90 degree elbow 30 • 45 degree elbow 16 • Tee, through run 20 • Tee, through branch 60

9. Suction Piping Precautions • If both pumps in a duplex set may be run together, use total flow in calculations • Figure static lift from bottom of tank • Use a 100% safety factor for strainer drop • Use a 40 or 100 mesh strainer for #2 oil • Use worst case viscosity in figuring loss

10. Priming the System • Try to keep pump close to tank • Eliminate “up and over” lifts • Add a priming funnel to the high point • Do not allow pumps to run dry • If possible, always use a foot valve to hold prime • Pressure test all suction piping

11. Some Terminology • Operating Pump Suction: This value is displayed on the screen at the suction side of the pump. This value is the total summation of all losses encountered on the suction side of the pump.   • Priming Pump Suction: This value takes into account the vertical lift of a dry system, and may also be referred to as the priming static lift. If a pump looses its prime, and the piping system is dry, the static lift may not be the same as the priming static lift. Therefore, the Priming Pump Suction must be examined as well as the Operating Pump Suction. This value takes into account the vertical distance of piping that might go above the centerline of the pump, before connecting with the pump. • S.G: Density of a fluid compared to the density of water.

12. Discharge Piping • Pressure at pump discharge • Add pressure needed at point of use plus • total gravity head and • pipe losses • Generally, discharge piping is smaller than suction piping • A Back Pressure Regulating Valve may be used to regulate pressure at point of use (boilers)

13. Viscosity as a Function of Temp.

14. Miscellaneous Cautions • Beware of entrained air • locate return and supply at opposite ends of tank • Avoid high lifts and “traps” • Allow for easy priming of pumps • Provide adequate vent lines • Provide properly sized day tank overflow lines • Design the system so it can be tested regularly • Don’t overlook controls

15. Loading the Fuel Oil Sizing Program

16. Opening Window - Select New or Existing File

17. Discharge Piping Selection

18. Application Selection Page

19. Opening Overview Display

20. Suction Piping Selection

21. Discharge Piping Selection

22. Final Overview Display

23. Pop Up Windows

24. Report Printing

25. Example Rule of THUMB Head Vacuum 5 ft of No. 2 Oil = 4 " Hg Head Pressure 5 ft of No. 2 Oil = 2 psi Required Exercise 1 5 psi For No. 2 Fuel Oil Determine: P1 and P2 Select Pump Set 100 feet P1 P2 100 feet 200 feet 10 300 gph of 1 inch of 1 inch feet Suction pipe Discharge pipe 10 Storage Tank feet

26. Example Rule of THUMB Head Vacuum 5 ft of No. 2 Oil = 4 " Hg Head Pressure 5 ft of No. 2 Oil = 2 psi Exercise 2 For No. 2 Fuel Oil Determine: P1 running and priming, P2 Required ASV Spring Size 5 psi Select Pump Set ASV 15 100 feet feet 17.5 of 1 inch feet Suction pipe 200 feet P1 P2 Storage Tank 300 feet 5 of 2 inch feet 400 gph Discharge pipe

27. Pressure Drop through Pipe Pressure drop through pipe, Number 2 Fuel Oil Flow, Gallons per hour

28. Preferred Utilities Manufacturing Corp For further information, contact... Preferred Utilities Manufacturing Corporation 31-35 South St. • Danbury • CT T: (203) 743-6741 • F: (203) 798-7313 www.preferred-mfg.com