2000 Hook-up Book - Spirax Sarco

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SYSTEM DESIGN 58 Spira-tec Trap Leak Detector System for Checking Steam Traps Purpose The Spira-tec Trap Leak Detector System is designed to indicate if a steam trap is leaking steam. It can be used to check any known type or make of trap while it is working. Equipment 1. Sensor chamber fitted immediately upstream of the trap (close coupled), the same size as the trap. 2. Indicator with cable. 3. Where the sensor chamber is not readily accessible, a Remote Test Point may be fitted at a convenient position, wired back through a junction to the sensor chamber. Remote Test Points for either one chamber or up to 12 chambers, are available. 4. An Automatic Remote Test Point, capable of interfacing with most Building Management Systems, is also available allowing up to 16 steam traps to be continuously scanned for steam wastage. Indicator Indicator Cable Basic steam trap checking system— Spira-tec sensor chamber, indicator and indicator cable. Indicator Sensor Chamber Multiple Remote Test Point Multiple inaccessible steam trap checking system— Spiratec sensor chambers, plug tails, wiring (by installer), remote multiple test point, indicator and indicator cable. Plug Tail Sensor Chamber Indicator Single inaccessible steam trap checking system— Spira-tec sensor chamber, plug tail, wiring (by installer), remote test point, indicator and indicator cable. Automatic Remote Test Point Junction Wiring by Installer Figure 61 Remote Test Point Continuous scanning system—Spira-tec Automatic Remote test point, sensor chambers, plug tails.
The steam meter is the basic tool that provides an operator or manager, information vital in monitoring and maintaining high efficiency levels within a plant or building. This information can be split into four categories: Plant Efficiency • Is idle machinery switched off? • Is the plant loaded to capacity? • Is plant efficiency deteriorating over time indicating the need for cleaning, maintenance and replacement of worn parts? • When do demand levels peak and who are the major users? This information may lead to a change in production methods to even out steam usage and ease the peak load problems on boiler plant. Energy Efficiency • Is an energy saving scheme proving effective? • How does the usage and efficiency of one piece of plant compare with another? Process Control • Is the optimum amount of steam being supplied to a certain process? • Is that steam at the correct pressure and temperature? Costing and Custody Transfer • How much steam is being supplied to each customer? • How much steam is each department or building within an organization using? Selecting a Steam Meter Before selecting a steam meter it is important to understand how a meter’s performance is described. The overall performance of a meter is a combination of Accuracy, Repeatability and Turndown. Accuracy This is the measurement (expressed as a percentage) of how close the meter’s indication of flow is to the actual flow through the meter. There are two methods used to express accuracy (or percentage of uncertainty) and they have very different meanings. a.Measured Value or Actual Reading Example: Meter is ranged 0- 1000 lb/h and has a specified accuracy of ± 3% of Actual Reading At an indicated flow rate of 1,000 lb/h, the true flow rate lies between 1,030 and 970 lb/h. At an indicated flow rate of 100 lb/h, the true flow rate lies between 103 and 97 lb/h. b.F.S.D. or Full Scale Deflection Example: Meter is ranged 0- 1000 lb/h and has a specified accuracy of ± 3% FSD At an indicated flow rate of 1,000 lb/h, the true flow rate lies between 1,030 and 970 lb/h. At an indicated flow rate of 100 lb/h, the true flow rate lies between 130 and 70 lb/h (i.e. ± 30% of Reading !). Table 18: Specification of the Spirax Sarco Meter Range Steam Meters Repeatability This describes the ability of a meter to indicate the same value for an identical flowrate over and over again. It should not be confused with accuracy i.e. the meter’s repeatability may be excellent in that it shows the same value for an identical flowrate on several occasions, but the reading may be consistently wrong (or inaccurate). Repeatability is expressed as a percentage of either actual reading or FSD. Good repeatability is important for observing trends or for control e.g. batching. Turndown Sometimes called Turndown Ratio, Effective Range or even Rangeability. In simple terms, it is the range of flow rate over which the meter will work within the accuracy and repeatability tolerances given. If a meter works within a certain specified accuracy at a maximum flow of 1,000 lb/h and a minimum flow of 100 lb/h, then dividing the maximum by the minimum gives a turndown of 10:1. A wide turndown is particularly important when the flow being measured is over a wide range. This could be due to a variation in process e.g. a laundry could be operating 1 machine or 20 machines (20:1 turndown), or due to seasonal variations in ambient temperature if the steam is being used for space heating - the difference in demand between mid winter and mid summer can be considerable. Generally the bigger the turndown the better. The Spirax Sarco family of meters covers a wide range of sizes, turndown, accuracy, and repeatability as detailed in Table 18. Meter Type Sizes Accuracy Turndown Repeatability Orifice Plate 1" -24" ± 3% of Reading 4:1 ± 0.3% of Reading Gilflo (Made to Order) 2" - 16" ±1% FSD (± 1% of Reading with flow computer) 100:1 ± 0.25% of Reading Gilflo (S.R.G.) 2" - 8" ± 2% FSD (± 1% of Reading with flow computer) 100:1 ± 0.25% of Reading Gilflo (I.L.V.A.) 2" - 8" ± 2% FSD (± 1% of Reading with flow computer) 100:1 ± 0.25% of Reading Spiraflo 1-1/2" - 4" ± 2% of Reading (50% - 100% of meter range) ± 1% FSD (1% - 50% of meter range) 25-40:1 ± 0.5% of Reading 59 SYSTEM DESIGN
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DESIGN OF FLUID SYSTEMS HOOK-UPS
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Spirax Sarco Spirax Sarco is the re
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Section 1: System Design Informatio
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SYSTEM DESIGN 2 The Working Pressur
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SYSTEM DESIGN 4 Sizing Steam Lines
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SYSTEM DESIGN 6 Sizing Superheated
Page 14 and 15: SYSTEM DESIGN 8 Draining Steam Main
Page 16 and 17: SYSTEM DESIGN 10 Draining Steam Mai
Page 18 and 19: SYSTEM DESIGN 12 Steam Tracing The
Page 20 and 21: SYSTEM DESIGN 14 Steam Tracing Sizi
Page 22 and 23: SYSTEM DESIGN 16 Steam Tracing Trac
Page 24 and 25: SYSTEM DESIGN 18 Steam Tracing A si
Page 26 and 27: SYSTEM DESIGN 20 Pressure Reducing
Page 28 and 29: SYSTEM DESIGN 22 Parallel and Serie
Page 30 and 31: SYSTEM DESIGN 24 How to Size Temper
Page 32 and 33: SYSTEM DESIGN 26 Temperature Contro
Page 38 and 39: SYSTEM DESIGN 32 Makeup Air Heating
Page 40 and 41: SYSTEM DESIGN 34 Draining Temperatu
Page 42 and 43: SYSTEM DESIGN 36 Draining Temperatu
Page 44 and 45: SYSTEM DESIGN 38 Steam Trap Selecti
Page 46 and 47: SYSTEM DESIGN 40 Steam Trap Selecti
Page 48 and 49: SYSTEM DESIGN 42 Flash Steam Flash
Page 50 and 51: SYSTEM DESIGN 44 Flash Steam Flash
Page 52 and 53: SYSTEM DESIGN 46 Condensate Recover
Page 54 and 55: SYSTEM DESIGN 48 Condensate Pumping
Page 56 and 57: SYSTEM DESIGN 50 Clean Steam Printi
Page 58 and 59: SYSTEM DESIGN 52 Clean Steam Overal
Page 60 and 61: SYSTEM DESIGN 54 Clean Steam Figure
Page 62 and 63: SYSTEM DESIGN 56 Testing Steam Trap
Page 66 and 67: SYSTEM DESIGN 60 Steam Meters Densi
Page 68 and 69: SYSTEM DESIGN 62 Compressed Air Sys
Page 70 and 71: SYSTEM DESIGN 64 Compressed Air Sys
Page 72 and 73: SYSTEM DESIGN 66 Compressed Air Lin
Page 74 and 75: SYSTEM DESIGN 68 Typical Steam Cons
Page 76 and 77: SYSTEM DESIGN 70 Specific Heats and
Page 78 and 79: SYSTEM DESIGN 72 Specific Heats and
Page 80 and 81: SYSTEM DESIGN 74 Conversions To Con
Page 82 and 83: SYSTEM DESIGN 76 Flow of Water thro
Page 84 and 85: SYSTEM DESIGN 78 Moisture Content o
Page 86 and 87: SYSTEM DESIGN 80 ANSI Flange Standa
Page 89 and 90: HOOK-UP APPLICATION DIAGRAMS Sectio
Page 91 and 92: Figure II-3 Draining and Air Ventin
Page 93 and 94: Figure II-8 Draining Steam Main whe
Page 95 and 96: Figure II-12 Typical Pressure Reduc
Page 97 and 98: Figure II-16 Installation of Pressu
Page 99 and 100: Figure II-20 Typical Pneumatic Sing
Page 101 and 102: Condensate Return Steam Supply Stea
Page 103 and 104: Steam Supply Steam Supply Figure II
Page 105 and 106: Figure II-31 Temperature Control of
Page 107 and 108: Elevated or Pressurized Return P 2
Page 109 and 110: Figure II-39 Controlling Temperatur
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Figure II-50 Trapping Small Utensil
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Figure II-55 Draining and Air Venti
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Figure II-59 Air Venting and Conden
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Evaporator Pressure Figure II-64 Dr
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Figure II-68 Installation of Pump/T
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Figure II-73 Draining Small Condens
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Figure II-78 Flash Steam Recovery a
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Figure II-80 Heating Water using Re
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Figure II-82 Recovery of Flash Stea
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Figure II-84 Flash Steam Condensing
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Figure II-87 Tank Sterilization Cle
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Steam Supply Figure II-93 Typical S
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Figure II-97 Hand Operated Rotary F
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Figure II-102 Freeze Proof Safety S
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Figure II-106 Continuous Boiler Blo
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Figure II-111 Controlling Temperatu
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141
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PRODUCT INFORMATION Section 3
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Steam Traps • Balanced Pressure T
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147
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Subject Index Safety...............
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Subject Index Radiation—Baseboard
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Argentina Spirax Sarco S.A. Ruta Pa
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2000 Hook-up Book - Spirax Sarco

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