Presentation on theme: "Preferred Utilities Manufacturing Corp."— Presentation transcript:
1Preferred Utilities Manufacturing Corp. Top 20!Things to Watch Out For…Preferred Utilities Mfg. Corp.31-35 South St. • Danbury • CT
2Tank Heating and Insulation No. 20Tank Heating and Insulation
320 - Tank Heating and Insulation Aboveground Storage Tank (AST) – installed in a cold climate – # 2 thru # 6 oil, heating requirements and insulation of tankEmergency generators – Approximately 40 F is the cloud point of paraffin wax in # 2 fuel oil Thermopump System applicationOption for Thermopump System is a winter blend of fuel oilPiping - # 6 oil – heat trace the pipe and insulate or FOS, FOR, steam and condensate return lines in a single carrier pipe with insulation
619 - Tank Gauge Installation TG-EL-WF, Wire Float Assembly requires 14” of clearance for installationTG-EL-WF offers mechanical testing of the assembly without removal from the tankVaulted tanks have minimal overhead space
918 - Fuel Leak DetectionUnderground Storage Tank (UST) – Pipe leak detection requirements, pitch double wall pipe containment to the piping sump on the tankUnderground Storage Tank (UST) – Typical pipe pitch is 1/8”/ft, long linear runs could present problems, might require a second sumpAll tanks –Discriminating leak detector for the Dry Interstitial space of the tank
1217 - Tank Overfill Prevention Tank gauging with overfill alarm stationType 2 In-Wall Spill Container with Overfill Alarm StationMechanical fill line overfill prevention device (i.e. OPW type 61)Vent line with overfill alarm switch
17Multiple Day Tank Applications No. 15Overflow Port Size
1815 - Overflow Port Size Day Tank continuous overflow system Day Tank continuous overflow systemVerify single day tank overflow port size capable to overflow pump supply capacityOverflow port location & high level switch on the level controllerRedundant back up – Install vent line leak switch & utilize N.O. Solenoid valves for vent line overflow conditions
2014 - Day Tank LocationDay tank above main storage tank – gravity return, overflow port sized to meet pump flow rateDay tank below main storage tank – non-gravity return, return pump system is required, pump flow rate capacity larger than pump set supply system
2213 - Air EntrainmentBPRV: Riser piping, install BPRV at the bottom of the riser, set pressure to maintain a constant head to prevent the cascading of the fuel and entraining airSyphon Breaker: Day tank header system applications, can use in conjunction with the BPRV
2313 - Air Entrainment VENT VACUUM BREAKER (OPTIONAL) TRAP HEADER RETURN SUPPLYSUPPLYSUPPLYENGINE #1ENGINE #2ENGINE #3RELIEFIN OUTPUMP SET
2413 - Air EntrainmentSeparate the Fuel Oil Supply (FOS) and Fuel Oil Return (FOR) Piping drop tubes in the tank to prevent the recycling of airFOS, 6-8” off the bottom of the tankFOR, 18-20” off the bottom of the tank, add a 90 elbow to direct return fuel away from suction
2612 – Burner & Day Tank Loops Burner – Flooded LoopReview piping losses & layout, BPRV may be required to divert oil into day tankDay tank supply at end of loop to assure burners will have sufficient fuel supplyBurner – Pressure LoopConnect day tank FOS downstream of the BPRV
3010 - Relief ValvesRelief valves on pump set– piped into the return line with no shut off valvesMultiple tank system with ball/gate valve arrangement, pipe relief valve into pump suction, utilize pump flow switch for safety shutdown
329 - FOR Shut-off valves No shut-off valves in the FOR piping If multiple tank design recommend utilizing a Tank Selector Valve, preventing a positive shutoff in the return lineIf tank selector valve not desirable, recommend automatic ball valves with end switches: preventing a positive shutoff with proper alignment and preventing a tank overfill due to improper valve alignment
33Vent Line Vertical Height No. 8Vent Line Vertical Height
348 - Vent Line Vertical Height Main Storage Tanks and Day TanksMaximum - 12’ of vertical vent lineImportant - 5 psi rating on standard tanks2.31 ft = 1 psi12”/2.31=5.19 psi
367 - Foot Valve Installation Install foot valve to prevent loss of prime if top of the tank is below the centerline of the pumpUtilize an extractor fitting for easy removal of foot valveExtractor fitting can be a potential air leak
386 - Maximum Height for ASV Install Anti-Syphon Valve (ASV) if top of the tank is above the centerline of the pumpMaximum height for ASV – 20’ above centerline of pumpAbove 20’ utilize a solenoid valve for an anti-syphon device
405 - Maximum Elevation Bottom of tank to pump centerline: 15 feet Rule of Thumb: # 2 oil, 15’=11.5” hg static liftAllows for line & fitting lossesAllows for pump wear and dirty strainerAllows for the unforeseeable design issues
424 - Long Linear RunsMinimize linear pipe runs, Ideally design system for a maximum 15” hg at pump inlet (empty tank), utilize your “Preferred Utilities Pipe Sizing Program” tool!!!Continuously exceed 17” of vacuum will cause premature pump wear & failureLong pipe runs present priming challengesAvoid inverted loop FOS pipe runs
443 – Fuel Oil FiltrationNFPA 110 Standard for Emergency and Standby Power Systems 2002 Edition, Tanks shall be sized so that the fuel is (1) consumed within the storage life, or (2) provision shall be made to re-place stale fuel or (3) clean fuel.
453 – Fuel Oil FiltrationFuture NFPA 20, Standard for the Installation of Stationary Pumps for Fire Protection, 1999 Edition8-6.4, Fuel Supply Maintenance. The fuel storage tanks shall be kept as full as possible at all times, but never less than 50 percent of tank capacity. The tanks shall always be filled by means that will ensure removal of all water and foreign material.
482 - Flow Rate Sizing Fuel Oil Loop, Burners – Flooded Loop Series – burners with integrated pumpsBurner return line piped into the FOS of the next burnerPump flow rate based on burn rate of the burners in the beginning of the loop plus the pump rate of the last burner, pump set flow 1.5 times the total consumption.Small burners require an Operating Safety Valve (OSV), NFPA code requirement (i.e. Power Flame, Webster, Gordon Piatt).
502 - Flow Rate Sizing Fuel Oil Loop, Burners – Pressure Loop Parallel – burners without integrated pumpsBurner return line piped into the FOR piping down stream of the back pressure regulating valvePump flow rate based on burn rate and fuel oil bypass, rule of thumb is 1.5 to 2 times the total burn rate of all burnersBack Pressure Regulating Valve (BPRV)
522 - Flow Rate Sizing Day Tank Fuel Oil Supply Loop Emergency Generators FOR returning to day tank, size pump set to meet total burn rateEmergency Generators FOR returning to main tank, size pump set to meet injector pump capacitiesDetermining factor for FOR to day tank vs. main tank: fuel oil cooling radiator to prevent day tank overheatingDetermine duty cycle of pump set
541 – System Design & Integration Work with your Preferred Utilities Regional ManagersEducate your customers and consulting engineers of the benefits of having a Preferred Utilities system at their facilityIntegrate the system to offer sole source responsibility. This is to assure the customer the highest standards of product quality and system integrity for reliabilityWrite the specification for the engineer!!!
55Preferred Utilities Manufacturing Corp For further information, contact...Preferred Utilities Manufacturing Corporation31-35 South St. • Danbury • CTT: (203) • F: (203)