Bulletin 301-L SERVICE GUIDE Armstrong Inverted Bucket Steam Traps A B T T D C Font C A21755
Table of Contents Trap Priming ________________________________2 Installation ________________________________3-8 Testing__________________________________9-10 Inspection & Repair_______________________10-14 Trouble Shooting _________________________14-18 Optional Accessories _____________________18-20 Trap Repairs & Change of Operating Pressure _20-22 Ordering Repair Parts _______________________23 Parts Identification __________________________24 Orifices & Valves _______________________24-25 Mechanisms _
Installation of Inverted Bucket Traps Before Installing Run pipe to trap. Before installing the trap, clean the line by blowing down at full steam pressure. (Clean any strainer screens after this blow-down.) Trap Location 1. Make the trap easily accessible for inspection and repair. 2. Install the trap below the drop point whenever possible. 3. Install the trap close to the drip point. Trap Hookups. For low and medium pressure service, see Figs. 3-1 through 6-1.
Condensate Return Line TVS 4000 w/No. 2010 Series Stainless Steel Trap Tracer Line Connection Vertical Manifold Fig. 4-1 Hookup for vertical manifold. Drip Leg 1810 Trap 1000 Valve 1800 Trap Fig. 4-2. Hookup for No. 1800 Series Stainless Steel trap. Fig. 4-3. Hookup for No. 1000 Series Stainless Steel trap. Shut-Off Valves ahead of traps are needed when traps drain steam mains, large water heaters, etc., where system cannot be shut down for trap maintenance.
Valve Valve Valve Fig. 5-1. Bypass hookups for No. 800-816 and 880-883 traps. Fig. 5-2. Bypass hookup forFig. No.5-1211-216 traps. A21729 Dirt Pocket Unions. If only one is used, it should be on discharge side of trap. With two unions, avoid horizontal or vertical in-line installations. The best practice is to install at right angles as in Figs. 3-1 and 5-1 or parallel as in Fig. 52. Standard Connections.
Dirt Pockets (Figs. 3-1 and 5-2) are excellent for stopping scale and core sand. Clean periodically. Syphon Installations require a water seal and a check valve in the trap. Syphon pipe should be one size smaller than nominal size of trap used but not less than 1/2” pipe size. A Unit X C Internal Check Valve B D Check Valve Fig. 6-2. Possible check valve locations, A, B, C & D. Water Seal Fig. 6-1. Trap draining syphon. Elevating Condensate. Do not over-size the vertical riser.
4. For maximum freeze protection utilize all stainless steel 1800, 1000 or 2000 Series traps in a vertical or horizontal manifolded condensate return system. NOTE: A long horizontal discharge line invites trouble. Ice can form at the far end eventually sealing off the pipe. This prevents the trap from operating. No more steam can enter the trap, and the water in the trap body freezes. Discharge to a return line. 1. Keep discharge line short with a sharp pitch to header. 2.
Drain or Pop Drain. Note: Thermo Drains and Pop Drains discharge hot condensate. Be sure this discharge does not present a personnel hazard. Thermo Drains are installed in a Tee ahead of 200 Series traps. In 800 Series traps thermo drains replace the drain plug in specially machined 800 Series trap bodies. When the steam supply is shut off and the temperature drops to 165°F, the thermal element opens the drain valve and empties the condensate from the trap body. Not recommended for service above 15 psig.
Testing Armstrong Traps For maximum trap life and steam economy, a regular schedule should be set up for trap testing and preventive maintenance. Trap size, operating pressure and importance determine how frequently traps should be checked. Operating Pressure (psig) 0-100 101-250 251-450 451 and above Suggested Yearly Trap Testing Frequency Application Drip Tracer Coil 1 1 2 2 2 2 2 2 3 3 3 4 How To Test Process 3 3 4 12 Test Valve Method is best. Fig.
Pyrometer Method of Testing. This method of testing is still used today, however current research has shown that information from this method is not as valid as the ultrasonic stethoscope. Listening Method of Testing. The ultrasonic stethoscope is the most accurate and up-to-date device available for testing traps today. An ultrasonic stethoscope can be used to listen to the outlet of the trap and “hear” the flow.
Valve Seat Installation. When installing valve seats in Armstrong traps, do NOT use any pipe dope or lubricant of any kind on the seat threads. The joint is made, not by the threads, but rather by the contact between the ground end of the valve seat and the beveled seating area at the bottom of the tapped hole. See Fig. 11-1. Make sure that this seating area is perfectly clean. Metal to Metal Joint Made Here Fig. 11-1. Important! Valve seat seal is made at point of contact indicated, not by threads.
Lever Guide Pin Valve Fulcrum Seat Fig. 12-1 Fig. 12-2 Fig. 12-3 Fig. 12-4 Fig. 12-5 Fig. 12-1 shows CORRECT ALIGNMENT of guide pins. When correctly aligned, lever can be moved sideways the same distance to the right (Fig. 12-2) as to the left (Fig. 12-3). Figs. 12-4 & 12-5 show two examples of INCORRECT ALIGNMENT. Guide pins should be bent in direction of arrows until they center in holes as shown in Fig. 12-1. Guide Pin Assembly Installation.
backflushed with compressed air or water under pressure to clean them. If there is an exceptional amount of dirt, install a strainer ahead of the trap. The strainer will have to be blown down or cleaned every 3-6 months, or as conditions warrant. By-Pass Valve Inspection. If traps are installed with a by-pass, it is highly important that the by-pass valve be checked to make sure it is perfectly steam tight. If the trap can be operated without the by-pass, by all means remove it.
with valve, guide pin assembly and (2) two screws. The diameter of the valve seat is stamped on the face of the seat itself, on the valve lever, and on the guide pin assembly. Parts having different stampings should never be used together. A valve lever and guide pin assembly are matched with the valve and seat to obtain the maximum possible leverage and trap capacity. At low pressure a low leverage is necessary to obtain full opening of the large orifice.
Cold Trap – No Discharge. If trap fails to discharge condensate, then: A. Pressure may be too high. 1. Wrong pressure originally specified. 2. Pressure raised without installing new pressure change assembly (PCA). 3. P.R.V. out of order. 4. Pressure gage in boiler reads low. 5. Orifice enlarged by normal wear. B. No water or steam coming to trap. 1. Stopped by plugged strainer ahead of trap – or plugged screen in integral strainer traps. 2. Broken valve in line to trap. 3. Pipe line or elbows plugged. C.
Fig. 16-1. Vent scrubbing wire for use when oil plugs vent. Trap inlet tube must be removed. 5/32" 3/4" 1/4" R Form to dotted line after inserting hole in rib. A .0625" Dia. Table 16-1 Scrubbing Wire Dimension Trap Model Number 800, 880 211, 310, 411-G, 811, 881, 981 212, 312, 812, 882 213, 214, 215, 313, 314, 315, 413, 813, 814, 815, 883, 983 216, 316, 816 Hot Trap – No Discharge. Length “A” 1¹⁄₂'' 2¹⁄₄'' 3'' 5'' 6¹⁄₂'' A. No water coming to trap. 1. Trap installed above leaky by-pass valve. 2.
installation of a check valve is called for – location D or C in Fig. 6-2. If possible locate trap well below drip point. Continuous Flow. If the trap discharges continuously, check the following: A. Trap too small. 1. A larger trap, or additional traps in parallel should be installed. 2. High pressure traps have been used for a low pressure job. Install correct size pressure change assembly (PCA). B. Abnormal water conditions. 1.
4. Obstruction in return line (trap hot or cold). 5. Excess vacuum in return line (trap cold). Imaginary Troubles. If it appears that steam escapes every time trap discharges, remember: Hot condensate forms flash steam when released to lower pressure, but flash steam usually condenses quickly in the return line. Optional Accessories Thermic Vent Buckets Wherever steam is turned on and off, air will accumulate in piping and steam equipment during the off period.
Internal Check Valves When either of the following conditions exists, check valves are needed between the trap and the unit drained: 1. Trap is installed above unit being drained. Fig. 19-1. Armstrong stainless steel internal check valve. 2. Where sudden pressure drops may occur in the steam supply to the unit being drained. Armstrong spring loaded, stainless steel internal check valves save fittings, labor and money when check valves are required.
Table 20-1 Check Valve Sizes To Use With Armstrong Traps Trap Model Number 800, 880, 881, 812, 882, 212.
A Mechanism Less Bucket — Pressure Change Assembly (PCA) (no change in operating pressure) will make an old trap practically as good as new since the trap bucket is not normally subjected to great wear. When ordering, specify maximum working pressure.
A valve lever and guide pin assembly are matched with the valve and seat to obtain the maximum possible leverage and trap capacity. At low pressure a low leverage is necessary to obtain full opening of the large orifice. As the orifice size decreases, less valve travel is required, hence, higher leverages can be employed.
Ordering Repair Parts When ordering replacement parts for repairable Armstrong inverted bucket traps, please specify the following information: For bodies and caps: Trap Model No. and pipe connection size. For mechanisms and buckets: Trap Model No. and maximum working pressure or orifice size. For all other parts: Trap Model No. Visual Identification of Mechanism Parts Fig. 23-1. Guide Pin Assembly Fig. 23-3. Valve Lever Fig. 23-2. Valve Seat Fig. 23-4. Valve Fig. 23-5. Valve Retainer Fig. 23-6.
Identification of Trap Parts by Dimensions The following dimensional data will enable you to identify any Armstrong free-floating lever trap part should there by any doubt as to the trap size to which it belongs. In the case of valves, seats, levers and guide pin assemblies, parts must be mated by orifice size. Orifice sizes are stamped on valve levers, valve seats and guide pin assemblies as shown below. Fig.
Table 25-1 Dimensional Identification Data, Valves, Seats, Levers, Retainers, Guide Pin Assemblies Trap Size A B 800, 880, 811, 881, TVS811 1-1/2'' 13/16'' 310, 211, 411-G, 981 1-7/8'' 1-21/32'' 212, 812, 882, TVS812 213, 312, 313, 413, 813, 883, 983, TVS813 2-5/16'' 2-7/64'' 2-3/4'' 2-15/32'' 214, 814, 314 3-1/8'' 2-11/16'' 215, 315, 415, 815 3-5/8'' 3-1/2'' 216, 316, 416, 816 2-1/4'' 2-7/64'' 5133-G 5155-G 2-3/4'' 2-11/16'' 6155-G 2-3/4'' 2-11/16'' *(w/orifice 1/8” thru 3/8”) *(w/orifice 7/16” thru 9/16”)
Table 26-1 Dimensional Identification Data, Buckets Weight of Bucket (ounces) 1-27/32 3-1/4 4 Clip Length Diameter Length “A” “B” “C” 1-13/16'' 2'' 1” 3'' 2'' 1” 3-3/4'' 2'' 1” Standard Bucket Vent Size .094” .081” .081” 0 - 30 PSI - .081” 7 3-15/16'' 2-3/4'' 1-5/16'' 212, 812, 882, TVS812 31 + PSI - .067” 7-1/2 3-15/16'' 2-3/4'' 1'' .067” 411-G 0 - 40 PSI - .081” 312 8-1/16 3-7/8'' 3'' 1-3/4'' 41 + PSI - .067” 213, 313, 413, 813, 0 - 60 PSI - .
Table 27-1 Dimensional Identification Data, Bodies, Caps and Gaskets Trap Model No. 800 811 TVS811 880 881 211 310 981 212 411-G 812 TVS812 882 213 312 813 TVS813 883 983 214 313 5133-G 814 413 314 815 215 315 5155-G 415 216 6155-G 316 416 816 Diam. Bolt Pipe Bolt Body Data Plugs Gaskets Thimble Circle No. Height “A” Bolts “B” “C” “D” Body Cap I.D. O.D. Type Diam. Lgth.
Table 28-1 Dimensional Data, Inlet Tubes Trap Model No.
Definitions Saturated Steam is pure steam at the temperature that corresponds to the boiling temperature of water at the existing pressure. Absolute and Gage Pressures. Absolute pressure (psia) is pressure in pounds per square inch above a perfect vacuum. Gage pressure is pressure in pounds per square inch above atmospheric pressure which is 14.7 pounds per square inch absolute. Gage pressure (psig) plus 14.7 equals absolute pressure. Or, absolute pressure minus 14.7 equals gage pressure.
Steam Tables Table 26-1 Properties of Saturated Steam psig Inches of Vacuum (Abstracted from Keenan and Keyes, THERMODYNAMIC PROPERTIES OF STEAM, by permission of John Wiley & Sons, Inc.) 30 Col. 1 Gauge Pressure Col. 2 Absolute Pressure (psia) Col. 3 Steam Temp. (°F) Col. 4 Heat of Sat. Liquid (btu/lb) Col. 5 Latent Heat (btu/lb) Col. 6 Total Heat of Steam (btu/lb) 29.743 29.515 27.886 19.742 9.562 7.536 5.490 3.454 1.418 0.0 1.3 2.3 5.3 10.3 15.3 20.3 25.3 30.3 40.3 50.3 60.3 70.3 80.3 90.
Steam Tables Heat quantities and temperature-pressure relationships are useful in a wide range of trap application problems. This data is presented in Table 30-1 Properties of Saturated Steam. How the Tables Are Used In addition to determining pressure-temperature relationships, you can compute the amount of steam that will be condensed by any heating unit of known btu output. Conversely, the tables can be used to determine btu output if steam condensing rate is known.
For convenience Chart 32-1 shows the amount of flash steam that will be formed when discharging condensate to different pressures. Chart 32.1 Percentage of Flash Steam Formed When Discharging Condensate to Reduced Pressure 32 Visit our website at www.armstronginternational.
Visit our website at www.armstronginternational.com 33 1/8 1/4 3/8 1/2 3/4 1 1-1/4 1-1/2 2 2-1/2 3 3-1/2 4 5 6 8 10 12 14 16 18 20 24 Size (in) 0.405 0.540 0.675 0.840 1.050 1.315 1.660 1.900 2.375 2.875 3.500 4.000 4.500 5.563 6.625 8.625 10.750 12.750 14.000 16.000 18.000 20.000 24.000 External (in) Approximate Internal (in) 0.269 0.364 0.493 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 3.548 4.026 5.047 6.065 7.981 10.020 11.938 13.125 15.000 16.874 18.814 22.626 Diameters 0.068 0.088 0.091 0.
Recommendations Survey Armstrong International, Inc. recommends that you survey your steam traps on a regular schedule. This steam trap survey will provide information on your hook-ups, the opportunity to correct problem areas, reduce maintenance, and provide energy savings. For more information on how you can optimize your steam system contact your Armstrong Representative or Armstrong International, Inc. Ph. (269) 273-1415, Fax (269) 278-6555 or visit Armstrong’s website at www.armstronginternational.com.
Products available from Armstrong International, Inc. Request Catalog 326 Solution Source for Steam, Air and Water Systems. 500 page manual which includes engineering guidelines along with information on Armstrong steam, air and water related products. Request Bulletin 320 CD-ROM of all material contained in 500-page manual described above coupled with Steam-A-Ware, Sizing and Selection Software.
Trap Application Assistance Trap application assistance is a most important part of the complete trap service provided by Armstrong International, Inc. Armstrong Representatives are qualified by factory training and extensive experience to assist you in any trapping problem. Backing the Representatives are Armstrong trapping specialists who are available to assist with especially difficult or unusual requirements. Limited Warranty and Remedy Armstrong International, Inc.
