APCO SEWAGE AIR VALVES GENERATION II - The Valve
BULLETIN 400JULY 2014APCO SEWAGE AIR VALVESGENERATION IISewage Combination Air ValveSeries 440 SCAVSewage Air Release ValveSeries 400 SARVSewage Air/Vacuum ValveSeries 401 SAVVPatented Concave Floatwww.dezurik.com
Generation II APCO Air Valves for SewagePipeline SystemsEffects of air in a pressurized closed-pipeline system must be recognized. An air pocket will decrease thecross sectional area and increase frictional pressure loss. The combined loss for two-phase flow (air and water)is always greater than the pressure loss for each phase flowing alone. Thus, air in a pipeline increases systemflow resistance and increases system head against which pumps must operate.Air may enter a piping system in many ways:(1) Air in the pipeline when initially filled may not be completely purged.(2) Air may be drawn in at a pump inlet by entrainment if the liquid level falls below the inlet elevation.(3) A ir in solution (about 2% by volume) will be released at points in the pipeline where the pressure isreduced, especially where the line elevation is close to the hydraulic gradient.(4) Gas created from digested sewage.(5) Air may be drawn in through packings, seals and flanged joints.(6) Air may enter by vortexing at the pump.Air in piping tends to collect at high points in the line when flow velocities are low. If the air pocket formed islarge, part of it will be removed when the velocity increases. This partitioned air may or may not go throughthe system. It all depends on velocity, pipe size, and pipe down-slope. It may only move into the slopingstraight section and then return to the summit when the velocity decreases.While it is impossible to totally prevent accumulation of air (or gases) within the piping system, the volume canbe greatly minimized by installing APCO Sewage Air Release Valves.When air is present in a hydraulic pipeline, flows are erratic, unpredictable and have high head losses. Sewageworks require Air Release Valves on pipeline high points.All APCO Sewage Valves are furnished for 150 psi (1034 kpa). Higher pressures available. Specify if operatingpressure is below 20 psi (138 kpa) for a lower durometer seat.Backflushing Attachments Optional for All Sewage ValvesWhile sewage media is standing in the valve body, sediment will attempt to settle out at the bottom.This sediment may be flushed out periodically.After installation, Sewage Valves should be inspected to determine need to backflush approximatelyonce a year. Inspection takes only a few minutes and is simple:1. Shut off the inlet valve.2. Open the blow off valve and observe. If fluid drains out the valve body rapidly, flushing is not required.Should heavy suspended solids and grease be anticipated, attachments shown are recommended for easeof flushing.2 2014 DeZURIK, Inc.www.dezurik.com
Sewage Combination Air Valve - Series 440 SCAV- First in a single body- No spills- No spurts- Shorter- Patented Concave floatNow, APCO brings you the latest state of the artSewage Air Valve design: a single body, doubleorifice “Sewage Combination Air Valve”.Generation II a new generation of air valve design.Field tested under actual operating conditions.Incorporating all features that have made the 400Sewage Air Release Valves and 401 Sewage Air/Vacuum Valves the world’s finest Now in a singlebody-plus a new concave float – to give even greaterperformance and reliability.You no longer need to dig deeper trenches or builddeeper vaults because the 440 series is at least 30%shorter than other models!Valves that won’t spill or spurt before shutting off.No more messy waste flooded valve vaults to pumpout – or pump station floors to mop up – it shuts offdrop tight.Take a serious look at Generation II – APCO SewageValves. Manufactured to our industry’s higheststandards providing the highest efficiency andreliability of any sewage air valve available in themarket today.Series 440 SCAVModelSizeInletOutlet4431"252" NPT504452"50447HeightValvew/Attachments1" NPT2519.5"49524.5"6222" NPT502" NPT5020.5"5213"803" NPT803" NPT804494"1004" NPT1004566"1506" 125 lb. "74911"27914767157714" .com3
Sewage Combination Air Valve (Single Body)With Two Independent OrificesSeries 440 SCAV-L arge orifice [for air out and in](Air/Vacuum Valve function)LargeorificeDoubleorificeSmallorifice-S mall orifice [for air release](Under pressure function)- Concave floatTwo major complaints nowremedied with APCO’s introductionof the concave float.BackflushingAttachmentsOptionalSinglebody1. SpillagePeople easily tolerate and are reasonable aboutwater spillage from valves but sewage is causefor some engineers and users alike to avoid use ofSewage Air Valves, regardless of need to a system.During the past 30 years, the single most highlyobjectional complaint about the Sewage Air Valve is,“it spills” or “it spurts sewage.”The concave float eliminates this complaint becauseof the unique impact zone which is extremelysensitive to sewage media entering the SewageAir Valve. The impact zone causes instantaneousand upward movement of the float to shut-off thedischarge orifice as soon as media contacts the float.Concave FloatOptionalInlet Shutoff ValveNo spilling or spurting occurs even with lowpressure (below 20 psi, 138 kpa).2. HeightThe second most objectional complaint has beenheight. Sewage Air Release Valves of standarddesign have been too tall, requiring deeper pipelinetrenches and bigger valve vaults. These are costlyrequirements.Now, the concave float with an impact zone allowsfast action closure to create a greater air trap insidethe Sewage Air Valve body than possible with thehemispherical style float. This new design is also30% shorter in height.ImpactZoneSmall 8.156"495InchMillimeterHigher operating pressures available4www.dezurik.com
SpecificationsSpecify APCO With ConfidenceSewage Combination Air Valve Series 440 SAVVSewage Combination Air Valve (single body, double orifice) allows large volumes of air to escape or enterthrough the larger diameter orifice when filling or draining a pipeline.When the pipeline is filled and pressurized the large air/vacuum orifice shall stay closed, but the smallerdiameter air release orifice shall remain operative and open to allow small pockets of air accumulation toescape automatically and independently of the large orifice.The large air/vacuum orifice shall shut off when the free floating-center guided plug is raised into the orificeby the lifting force of the concave - bottom float. The large orifice shut-off shall be “without spilling.”The Buna-N seat must be fastened to the valve cover, without distortion, for drop-tight shut-off.The overall height and width shall not exceed the dimensions shown on the table on page 3.Optional - Inlet and blow off valves, quick disconnect couplings and minimum 5' (1.5m) hose for flushing.Engineer to specify.Materials of construction shall be certified the following ASTM specifications:Body & CoverPatented Concave FloatStemNeedle and SeatPlug (1"-4")(25-102mm)(6" size)(152mm)Leverage Frame (1"-2")(25-51mm)Exterior Paintwww.dezurik.comCast IronDuctile IronStainless SteelStainless SteelBuna-NBrassStainless SteelDelrin or Cast Iron (3"-4"-6")Universal Metal PrimerASTM A126 GR.BASTM A536 GR 65-45-12ASTM A240 T304Series T300Nitrile RubberASTM B124ASTM A240 T304ASTM D4181/ASTM A126 GR.BFDA Approved for Potable Water5
Sewage Air/Vacuum Valve - Series achmentsOptionalSeries 401 and larger Model APCO Sewage Air/Vacuum Valves are specifically designed foroperation on sewage and waste media.Air/Vacuum Valves are needed to vent largevolumes of air when the sewage line is filled andallow air to re-enter when draining, to preventvacuum or column separation occurring. SewageAir/Vacuum Valves utilize two floats, eachconnected to a common stem which is guidedthrough a bushing.The upper float shuts off instantaneously againstthe seat, due to the impact zone and lifting forceof the much larger concave bottom float, assewage media enters the valve body.Once closed, and pressurized, the Air/VacuumValve will not open to release air. It will openunder negative pressure allowing air to re-enterand prevent vacuum from forming in the line.ConcaveFloatOptionalBlowoffValveLarger SizesHave FlangedInletsOptionalInlet Shutoff Valve6www.dezurik.com
Dimensions and SpecificationsSeries 401 Sewage Air Vacuum MajorDia.Plainw/Attachments4012" NPT501" NPT2516.25"41320"5087"178411955254022" NPT502" NPT5019.75"50223.5"5979.5"2418539115524033" NPT803" NPT8019.75"50223.75"6039.5"2418539118544044" NPT1004" Plain10030"76235.25"89512"30513059200914066" FLG1506" Plain15032.5"82636.5"92716"406190862901324088" FLG2008" Plain20036"91440"101618"45731014143019541010" FLG25010" Plain25041"104145"114320"50860027280036341212" FLG30012" Plain30047"119453.5"135925"63575034098044541414" FLG35014" lInchMillimeterPoundsKilograms4" (100mm) and larger flanged outlets available.Specify APCO with Confidence - Sewage Air/Vacuum Valve Series 401Sewage Air/Vacuum Valves shall allow unrestricted venting or re-entry of air through it during filling ordraining of the force main to prevent vacuum. The Sewage Air/Vacuum Valve shall incorporate (2)stainless steel floats directly connected by a stainless steel stem, to maintain an air gap between the bottomconcave float and top shut-off float. The air gap shall retard waste solids from fouling or clogging the topshut-off float. The internal baffle shall be fitted with a guide bushings and act to protect the shut-off float fromdirect air flow. The baffle shall retain the Buna-N seat in place, without distortion for tight shut-off.All internals shall be easily removed thru the top cover without removing the main valve from the line. Thecomplete valve shall withstand 500 psi (3447 kpa) test. Optional - Inlet and blow off valves, quick disconnectcouplings and minimum 5' (1.5m) hose for flushing. Engineer to specify.The valve manufacturer shall furnish professionally printed installation and maintenance instruction manualswith each valve.Materials of construction shall be certified the following ASTM specifications:Body, Cover and BaffleUpper FloatPatented Concave Lower FloatStem, Guide BushingSeatExterior Paintwww.dezurik.comCast IronDuctile IronStainless SteelStainless SteelStainless SteelBuna-NUniversal Metal PrimerASTM A126 GR.BASTM A536 GR 65-45-12ASTM A240ASTM A240 T304Series T300Nitrile RubberFDA Approved for Potable Water7
Sewage Air Release Valve - Series 400 & 450Series 400 and 450 APCO Sewage Air ReleaseValves are specially designed for use with sewageand waste media.ShutoffValveShown 90 Out ofPositionThe concave float, stem and body keep thevalve venting mechanism as free from contactwith sewage as possible. The float hangs freelyin the center of the valve body and respondsinstantaneously to the fall and rise of the sewagemedia due to the concave float.BackflushingAttachmentsOptionalHow It WorksWhen sewage enters the valve, it rises, forcingair out ahead of it. Then as sewage reaches theconcave float, it raises the float and float steminstantly, due to the very sensitive impact zone.This fast action closes the venting mechanism,trapping the remaining air in the valve body. Thisentrapped air is initially at atmospheric pressure butit’s compressed after the venting mechanism closes.The sewage continues rising in the valve, until airand sewage are at the same pressure. The sewagethen stops rising, leaving the venting mechanismfree from contamination.Additional gases given off by the sewage rise intothe valve body, displacing and lowering the sewagelevel until the float drops, opening the ventingmechanism allowing gases to escape. Sewageagain rises to occupy the space vacated by theescaped gas, lifts the float and closes the ventingmechanism. This cycle is repeated frequently asair and gas collect in the valve without spillageor spurting, due to the sensitivity of the patentedconcave zurik.com
Dimensions and SpecificationsSeries 400 & 450 Sewage Air Release ValvesModelInlet2" NPT503" NPT804" NPT1002" NPT503" NPT804" tOutlet.5" NPT131" 10-500-3450-1500-10340-3000-2068.313"8.25 STD6.156"40-1500-1034.5" Orifice diameter is determined by pressure, not by size.Specify APCO With ConfidenceSewage Air Release Valve Models 400 & 450Sewage Air Release Valves shall have an elongated body and be designed to operate (open) while pressurizedallowing entrained air in a sewage force main line, sewage pump or waste water system to escape throughthe air release orifice without spillage or spurting. After entrained air escapes through the air release orifice,the valve orifice shall be closed by a needle mounted on a compound lever mechanism, (energized by aconcave float) and prevent media from escaping. The air release orifice will then remain closed until moreair accumulates and the opening cycle repeats automatically. The internal compound lever mechanism shallbe stainless steel to prevent corrosion. Optional: Inlet and blow off valves, quick disconnect couplings andminimum 5’ (1.5m) hose for flushing. Engineer to specify.The internal linkage shall be fitted with a stem, having a stainless steel concave float threaded onto theopposite end. The concave float shall hang inside the valve body, slightly above the inlet and maintain anair gap between the lever mechanism and the waste media. The valve body and float shall withstand 500psi (3447kpa) shell test pressure. The valve inlet shall be 2", 3", 4" NPT (50, 80, 100mm) Model 400 or 450.Engineer to specify.Materials of construction shall be certified the following ASTM specifications:Body & CoverInternal Linkage, StemPatented Concave FloatNeedleExterior Paintwww.dezurik.comCast IronDuctile IronStainless SteelStainless SteelBuna-NUniversal Metal PrimerASTM A126 GR.BASTM A536 GR 65-45-12Series T300ASTM A240 T304Nitrile RubberFDA Approved for Potable Water9
Custom Combination Sewage Air ValvesTypical pit installation detail for Sewage Air ValveFinishedgradeSeat DetailAir/Vacuum Valve125 lb: 14" (350mm) & larger250 lb: all sizes30" Dia. Vented M H Frameand Cover (bolted down)6"Min.SewageAir ReleaseValveAPCOSewageAir ReleaseValves3' - 0"I.D.PrecastConcrete(depth asrequired)Concave Float2" NPT.2" teFootingFoOtInGCompactedGravel BeddingTyp.8"Min.IsolationButterfly ValveInletPerformance graphFor Air/Vacuum Valve air inflow/outflow thru valve in standard cubic feet of free air per second, (SCFS) test conducted by:Phillips Petroleum Company Engineering Department — Test Division Edmond Plant Feb. 2, 1961Southern Research Institute Birmingham, Alabama May 8, 1959OutflowInflow10050 40 30 2010 8 7 6 5 4321 0.8 0.6 0.4 0.3 0.2Valve Size1234514" 12" 10" 8"6"4" 3"2"1".5"Valve Size6Curves shown are actual flow capacities at 14.7 psi barometricpressure and at 70 f temperature base on actual test.These figures are not merely flow capacities across the orifice,but flow capacities across the entire valve.In the test set-up, air approach velocity is negligible therefore,actual flow capacity exceeds the values shown on the chart.10Vacuum across valve in psi300 200Vacuum across valve in psi500.5"1"2"3" 4"6"8" 10" 12" 14"1234560.2 0.3 0.4 0.6 0.8 1234 5 6 7 8 1020 30 40 50100200 300500For accurate sizeselection use DeZURIK/APCO Air ValveComputer software.Apslide available uponrequest.www.dezurik.com
Specify APCO With ConfidenceCustom Combination Sewage Air Valve Series 400CCustom Combination Sewage Air Valve shall be dual function; venting large volumes of air through the largeorifice and small pockets of air through the small orifice before shutting off. Thereafter, while pressurized,collecting pockets of air will be vented through the small orifice automatically. Should vacuum develop in theforce main, both orifices shall be open permitting large volumes of air to re-enter to break the vacuum.The Custom Combination Sewage Air Valve shall consist of an independent large orifice Air/Vacuum Valve withan independent small orifice Air Release Valve side connected. The small orifice air valve shall be separatedfrom the large orifice by a 2" (50mm) gate valve. The large orifice air valve shall incorporate one upper float andone lower concave float; thereby maintaining an air gap between the concave bottom float and upper shut-offfloat.The small orifice air valve shall have an internal compound lever mechanism including a long float stem witha stainless steel float thereby maintaining an air gap between the float and the mechanism. The air gaps shallretard waste solids from clogging the upper shut-off float of the large orifice and the lever mechanism of thesmall orifice valve.The Air/Vacuum Valve inlet shall be flanged 6" - 14" (150 - 350mm). The outlet shall be plain with hood orflanged. Engineer to specify.The side connected Air Release Valve shall have a 2" (50mm) NPT inlet and 1/2" (15mm) NPT outlet. The smallorifice shall be 1/4" (6mm) diameter for operating (opening) pressure up to 150 psi (1034kpa) and ventingcapacity of 90 CFFAM.Optional Backflushing Attachments:Custom Combination Sewage Air Valve shall be fitted with two inlet isolation Valves: 2" (50mm) all Bronze gatevalve to isolate the Air Release Valve from the Air/Vacuum Valve. One 6" - 14" (150 - 350mm) APCO ButterflyValve or Gate Valve to isolate the Air/Vacuum Valve from the force main. Two blow off valves, two flush valvesand minimum of 5' (1.5m) rubber hose with quick disconnects for back-flushing. The manufacturer shall certifyventing capacity and provide maintenance manuals with each valve.Materials of construction shall be certified to the following ASTM specificationsBody, CoverFloat StemInternal LinkageNeedle and SeatPatented Concave FloatExterior paintCast IronDuctile IronStainless SteelStainless SteelBuna-NStainless SteelUniversal Metal PrimerASTM A126 GR.BASTM A536 GR 65-45-12Series T300Series T300Nitrile RubberASTM A240 T304FDA Approved for Potable Water ContactValve to be APCO Series 400C Custom Combination Sewage Air Valve with attachments.www.dezurik.com11
Sales and ServiceFor information about our worldwide locations, approvals, certifications and local representative:Web Site: www.dezurik.comE-Mail: info@dezurik.com250 Riverside Ave. N. Sartell, Minnesota 56377 Phone: 320-259-2000 Fax: 320-259-2227DeZURIK, Inc. reserves the right to incorporate our latest design and material changes without notice or obligation.Design features, materials of construction and dimensional data, as described in this bulletin, are provided for your information onlyand should not be relied upon unless confirmed in writing by DeZURIK, Inc. Certified drawings are available upon request.Printed in the U.S.A.
Sewage Combination Air Valve Series 440 SAVV Sewage Combination Air Valve (single body, double orifice) allows large volumes of air to escape or enter through the larger diameter orifice when filling or draining a pipeline. When the pipeline is filled and pressurized the large air
APCO ANS 3.101.1-2007 Unique number identifying the standard APCO ANS 3.101.1-2007 The edition of the standard, which will increase after each revision APCO ANS 3.101.1-2007 The year the standard was approved and published, which may change after each revision. The latest edition of an APCO standard cancels and replaces older versions of
APCO Air/Vacuum Valve, one APCO Air Release Valve and an optional one DeZURIK Butterfly Valve, shipped completely piped and assembled. Price of each Custom Combination Air Valve includes 1" (25 mm) piping and 1" (25 mm) gate or ball valve. Available in 125, 250, 600 and 900 psi (862, 1
Plug valves shall be rectangular ported” Item No. 7 – Section 4.09 “VALVES AND GATES”, Subsection 4.09.6 “SWING CHECK VALVES” Paragraph “g” Revise “Swing check valves shall be Apco Seri es 6000 or City of Kenner approved equal” to the following: “Swing check valves shall be Apco Series 6
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However, the machining of these typically difficult-to-cut materials poses a challenge for conventional manufacturing technologies due to the high tool wear. Abrasive water jet (AWJ) machining is a promising alternative manufacturing technology for machining difficult-to-cut materials,
