Steam Traps - Armstrong International

1 Catalog No. 108-CSteam TrapsInverted bucket, float andthermostatic, thermostaticand controlled disc steamtraps in carbon steel,stainless steel, forgedsteel and cast Energy Down to EarthSay energy. Think vice company that is energy conscious is also environ-mentally conscious. Less energy consumed meansless waste, fewer emissions and a short, bringing energy and environment togetherlowers the cost industry must pay for both. By helpingcompanies manage energy, Armstrong products andservices are also helping to protect the has been sharing know-how since weinvented the energy-efficient inverted bucket steamtrap in 1911.

2 In the years since, customers savingshave proven again and again that knowledge notshared is energy wasted. 1997 Armstrong International , and materials are subject to change without of ContentsInverted Bucket Steam Trap Introduction6 Cast Iron Inverted Bucket Steam Traps8 Forged Steel Inverted Bucket Steam Traps10 Capacity Chart for Inverted Bucket Traps12 Series 2010 Stainless Steel Inverted BucketSteam Traps14 Series 1810 Stainless Steel Inverted BucketSteam Traps16 Series 1010 and U-1010 Stainless SteelInverted Bucket Steam Traps18 Cast Steel Inverted Bucket Steam Traps20 Automatic Differential Condensate Controllers22 Float and thermostatic Steam Trap

3 Introduction24A&B Series Float and thermostatic Steam Traps26 Ultra-Capacity Float and ThermostaticSteam Traps28 thermostatic Wafer Traps30 Balanced Pressure Bellows Traps31 Radiator Traps33 Controlled Disc Steam Traps34 Capacities and Physical Data for ArmstrongSteam Traps in Metric Units354 Abbreviated Trap Selection and How to OrderTrap application assistanceis one of the most important partsof the complete trap service pro-vided by Armstrong Representatives arequalified by factory training andextensive field experience to assistyou in any trapping the representatives areArmstrong trapping specialistswho are available to assist withespecially difficult or to model size of pipe flanges are required,specify type of flange in maximum workingpressure that will orifice any options section only highlights thecomplete trap selection informationavailable in the Armstrong SteamConservation Guidelines for Con-densate Drainage, Handbook s Software Program 1( Steam Trap Sizing and Selection)

4 Is designed to be used in conjunc-tion with Handbook N-101 and thiscatalog. If you do not have Hand-book N-101 or your free copy ofSoftware Program 1, contact yourArmstrong installation and operation ofsteam trapping equipment shouldbe performed only by experiencedpersonnel. Selection or installationshould always be accompanied bycompetent technical assistance oradvice. This catalog or its accompa-nying handbook should never beused as a substitute for suchtechnical advice or encourage you to contactArmstrong or its local representativefor further ConsiderationsUnit trapping is the use of a sepa-rate Steam trap on each condensingunit including, whenever possible,each separate chest or coil of asingle ll select most Traps with theaid of past experience.

5 Either yours,the know-how of your ArmstrongRepresentative/Distributor or whatothers have learned in trappingsimilar sizing is simple withthe aid of Armstrong SoftwareProgram 1. Even if you don t haveaccess to this computer program,trap sizing is easy when you knowor can figure:1. Condensate loads in The safety factor to Pressure Maximum allowable Factor or Experience FactorSteam mains. Select Traps todischarge condensate produced byradiation installed between the boilerand the end of the Steam main: 2 installed at the end of themain or ahead of reducing andshutoff valves that are closed partof the time: 3 tracer lines.

6 On mosttracer line applications, the flow tothe Steam trap is surprisingly , the smallest trap isnormally equipment. Differentapplication requirements involvingconstant or variable Steam pressuredetermine which type of trap shouldbe used. The safety factor is depen-dent upon the type of equipmentbeing drained and the Constant Steam PressureA 2:1 or a 3:1 safety factor atoperating pressure Modulating Steam Traps and inverted buckettraps with thermic 0-15 psig Steam 2:1 psi pressure differential.(On F&T Traps SHEMA ratings can also be used.)

7 2. 16-30 psig Steam 2:1 at2 psi pressure Above 30 psig Steam 3:1at 1/2 of maximum pressuredifferential across the Inverted bucket Traps withoutthermic buckets. Above 30 psigsteam pressure only 3:1 at .5of maximum pressure differentialacross the Bimetallic and wafer Traps Not recommended for low pressure Cast iron Traps not In welded stainless steel construction Condensate drainage is continuous, dischargeis Can be continuous on low Excellent when secondary Steam is Can fail closed due to Can fail either open or closed dependingupon the design of the ControllerFeatureCodeMethod of Operation(1) Intermittent ContinuousIntermittent(2) IntermittentContinuousEnergy Conservation (Time in Service)

8 ExcellentGoodPoorFair(3) ExcellentResistance to WearExcellentGoodPoorFairExcellentCorros ion ResistanceExcellentGoodExcellentGoodExce llentResistance to Hydraulic ShockExcellentPoorExcellent(4) PoorExcellentVents Air and CO2 at Steam TemperatureYesNoNoNoYesAbility to Vent Air at Very Low Pressure (1/4psig)PoorExcellent(5) NR GoodExcellentAbility to Handle Start-up Air LoadsFairExcellentPoorExcellentExcellent Operation Against Back PressureExcellentExcellentPoorExcellentE xcellentResistance to Damage from Freezing (6)GoodPoorGoodGoodGoodAbility to Purge SystemExcellentFairExcellentGoodExcellen tPerformance on Very Light LoadsExcellentExcellentPoorExcellentExce llentResponsiveness to Slugs of CondensateImmediateImmediateDelayedDelay edImmediateAbility to Handle DirtExcellentPoorPoorFairExcellentCompar ative Physical Size(7) LargeLargeSmallSmallLargeAbility to Handle Flash Steam FairPoorPoorPoorExcellentMechanical Failure (Open - Closed)OpenClosed(8) Open(9)OpenATable 5-1.

9 How Various Types of Steam Traps Meet Specific Operating Requirements6 The Inverted Bucket Steam TrapVenting of Air and CO2 The Armstrong inverted bucketprovides continuous automatic airand CO2 venting with no coolinglag or threat of air Against Back PressureThe Armstrong inverted bucket hasexcellent performance against backpressure. It has no adverse effecton inverted bucket operation otherthan to reduce its capacity by thelow differential. The bucket simplyrequires less force to pull the valveopen and cycle the From Dirt ProblemsArmstrong designed its invertedbucket to be virtually free of dirtproblems.

10 The valve and seat areat the top of the trap, far away fromthe larger particles of dirt which fallto the bottom. Here the up-and-downaction of the bucket pulverizes the valve of an inverted bucketis either fully closed or open, dirtparticles pass freely. And the swiftflow of condensate from under thebucket s edge creates a uniqueself-scrubbing action that sweepsdirt out of the Efficient BecauseIt s So ReliableThe inverted bucket is the mostreliable Steam trap operating prin-ciple known. The heart of its simpledesign is a unique leverage systemthat multiplies the force provided bythe bucket to open the valve againstpressure.