Tin tức
  • FLOAT & THERMOSTATIC TRAPS - HOW IT WORKS

    09/10/2020

    Float & Thermostatic steam traps are the most common trap type used for process applications. They use a float-operated valve mechanism to discharge condensate as it is formed, and an air vent for discharging air at start-up; both very important requirements for process applications. Venting Air Prior to the steam being turn on the piping system, heat exchanger and trap are filled with air which is much cooler than steam. The thermostatic air vent will be in the wide open position. During startup this air will be pushed through the air vent by the incoming steam into the condensate return line. Discharging Condensate When condensate enters the trap, the float lifts which opens the valve, allowing condensate to discharge. Closed (Trapping Steam) When steam is present, and no condensate is entering the trap, the valve and thermostatic air vent remain closed, trapping steam in the system.  

  • TIÊU CHUẨN REN BSP

    04/10/2020

    Tiêu chuẩn Ren BSP là tiêu chuẩn ren của nước Anh  BSP  được viết tắt từ British Standard Pipe Ren BSP được chia làm 2 loại như sau: + Ren thẳng BSPP (British Standard Pipe Parallel thread), đỉnh ren và chân ren đi song song với nhau Bảng kích thước chi tiết: Major Dia   External Thread Internal Thread   Size Size pitch Major Dia D Pitch Dia D2 Minor Dia  Minor Dia d Pitch Dia d2 Major Dia d3 Tap Drill Thread Designation mm mm Max Min Max Min Max Min Max Min Max Min mm  1/16 7.723 0.907 7.723 7.509 7.142 7.035 6.561 6.561 6.834 7.142 7.249 7.723 6.8  1/16 7.723 0.907 7.723 7.509 7.142 6.928 6.561              1/8 9.728 0.907 9.728 9.514 9.147 9.040 8.566 8.566 8.848 9.147 9.254 9.728 8.8  1/8 9.728 0.907 9.728 9.514 9.147 8.933 8.566              1/4 13.157 1.337 13.157 12.907 12.301 12.176 11.445 11.445 11.89 12.301 12.426 13.157 11.8  1/4 13.157 1.337 13.157 12.907 12.301 12.051 11.445              3/8 16.662 1.337 16.662 16.412 15.806 15.681 14.950 14.95 15.395 15.806 15.931 16.662 15.25  3/8 16.662 1.337 16.662 16.412 15.806 15.556 14.950              1/2 20.955 1.814 20.955 20.671 19.793 19.651 18.631 18.631 19.172 19.793 19.935 20.955 19  1/2 20.955 1.814 20.955 20.671 19.793 19.509 18.631              5/8 22.911 1.814 22.911 22.627 21.749 21.607 20.587 20.587 21.128 21.749 21.891 22.911 21  5/8 22.911 1.814 22.911 22.627 21.749 21.465 20.587              3/4 26.441 1.814 26.441 26.157 25.279 25.137 24.117 24.117 24.658 25.279 25.421 26.441 24.5  3/4 26.441 1.814 26.441 26.157 25.279 24.995 24.117              7/8 30.201 1.814 30.201 29.917 29.039 28.897 27.877 27.877 28.418 29.039 29.181 30.201 28.25  7/8 30.201 1.814 30.201 29.917 29.039 28.755 27.877              1 33.249 2.309 33.249 32.889 31.770 31.590 30.291 30.291 30.931 31.77 31.95 33.249 30.75  1 33.249 2.309 33.249 32.889 31.770 31.410 30.291              1 1/8 37.897 2.309 37.897 37.537 36.418 36.238 34.939 34.939 35.579 36.418 36.598 37.897 35.5  1 1/8 37.897 2.309 37.897 37.537 36.418 36.058 34.939              1 1/4 41.910 2.309 41.910 41.550 40.431 40.251 38.952 38.952 39.592 40.431 40.611 41.910 39.5  1 1/4 41.910 2.309 41.910 41.550 40.431 40.071 38.952              1 1/2 47.803 2.309 47.803 47.443 46.324 46.144 44.845 44.845 45.485 46.324 46.504 47.803 45.25  1 1/2 47.803 2.309 47.803 47.443 46.324 45.964 44.845              1 3/4 53.746 2.309 53.746 53.386 52.267 52.087 50.788 50.788 51.428 52.267 52.447 53.746 51  1 3/4 53.746 2.309 53.746 53.386 52.267 51.907 50.788              2 59.614 2.309 59.614 59.254 58.135 57.955 56.656 56.656 57.296 58.135 58.315 59.614 57  2 59.614 2.309 59.614 59.254 58.135 57.775 56.656              2 1/4 65.710 2.309 65.710 65.276 64.231 64.014 62.752 62.752 63.392 64.231 64.448 65.710 63.3  2 1/4 65.710 2.309 65.710 65.276 64.231 63.797 62.752              2 1/2 75.184 2.309 75.184 74.750 73.705 73.488 72.226 72.226 72.866 73.705 73.922 75.184 72.8  2 1/2 75.184 2.309 75.184 74.750 73.705 73.271 72.226              2 3/4 81.534 2.309 81.534 81.100 80.055 79.838 78.576 78.576 79.216 80.055 80.272 81.534 79.1  2 3/4 81.534 2.309 81.534 81.100 80.055 79.621 78.576              3 87.884 2.309 87.884 87.450 86.405 86.188 84.926 84.926 85.566 86.405 86.622 87.884 85.5  3 87.884 2.309 87.884 87.450 86.405 85.971 84.926              3 1/2 100.330 2.309 100.330 99.896 98.851 98.634 97.372 97.372 98.012 98.851 99.068 100.330 97.75  3 1/2 100.330 2.309 100.330 99.896 98.851 98.417 97.372              4 113.030 2.309 113.030 112.596 111.551 111.334 110.072 110.072 110.712 111.551 111.768 113.030 110.5  4 113.030 2.309 113.030 112.596 111.551 111.117 110.072              4 1/2 125.730 2.309 125.730 125.296 124.251 124.034 122.772 122.772 123.412 124.251 124.468 125.730 123  4 1/2 125.730 2.309 125.730 125.296 124.251 123.817 122.772              5 138.430 2.309 138.430 137.996 136.951 136.734 135.472 135.472 136.112 136.951 137.168 138.430 136  5 138.430 2.309 138.430 137.996 136.951 136.517 135.472              5 1/2 151.130 2.309 151.130 150.696 149.651 149.434 148.172 148.172 148.812 149.651 149.868 151.130 148.5  5 1/2 151.130 2.309 151.130 150.696 149.651 149.217 148.172              6 163.830 2.309 163.830 163.396 162.351 162.134 160.872 160.872 161.512 162.351 162.568 163.830 161.5  6 163.830 2.309 163.830 163.396 162.351 161.917 160.872             + Ren thẳng BSPT (British Standard Pipe  Taper thread), đỉnh ren và chân ren tăng hoặc giảm kích thước, có dạng côn Bảng kích thước chi tiết: Thread Nominal Thread Major Pitch Threads Pitch Minor Thread Rounding Effective Tap Designation Size Form Diameter mm per Diameter Diameter Height r Thread Drill     Type mm p inch mm Male Thd. H1   Length mm Diameter BSPT BSPT   d=D   tpi d2=D2 d3=D3     External mm R 1/16 1/16" BSPT 7.723 0.907 28 7.142 6.561 0.581 0.125 2.5 6.4 R 1/8 1/8" BSPT 9.728 0.907 28 9.147 8.566 0.581 0.125 2.5 8.4 R 1/4 1/4" BSPT 13.157 1.337 19 12.301 11.445 0.856 0.184 3.7 11.2 R 3/8 3/8" BSPT 16.662 1.337 19 15.806 14.95 0.856 0.184 3.7 14.75 R 1/2 1/2" BSPT 20.955 1.814 14 19.793 18.631 1.162 0.249 5 18.25 R 3/4 3/4" BSPT 26.441 1.814 14 25.279 24.117 1.162 0.249 5 23.75 R 1 1" BSPT 33.249 2.309 11 31.77 30.291 1.479 0.317 6.4 30 R 1 1/4 1 1/4" BSPT 41.91 2.309 11 40.431 38.952 1.479 0.317 6.4 38.5 R 1 1/2 1 1/2" BSPT 47.803 2.309 11 46.324 44.845 1.479 0.317 6.4 44.5 R 2 2" BSPT 59.614 2.309 11 58.135 56.656 1.479 0.317 7.5 56 R 2 1/2 2 1/2" BSPT 75.184 2.309 11 73.705 72.226 1.479 0.317 9.2 71 R 3 3" BSPT 87.884 2.309 11 86.405 84.926 1.479 0.317 9.2 85.5 R 4 4" BSPT 113.03 2.309 11 111.551 110.072 1.479 0.317 10.4 110.5 R 5 5" BSPT 138.43 2.309 11 136.951 135.472 1.479 0.317 11.5 136 R 6 6" BSPT 163.83 2.309 11 162.351 160.872 1.479 0.317 11.5 161.  

  • THERMODYNAMIC STEAM TRAP - HOW IT WORKS

    02/10/2020

    Thermodynamic Steam Trap Thermodynamic traps have only one moving part, the valve disc, which allows condensate to be discharged when present and closes tightly upon the arrival of steam. These traps have an inherently rugged design and are commonly used as drip traps on steam mains and supply lines. Their solid construction and single moving part make them resistant to waterhammer and are freeze-proof when installed vertically. Thermodynamic traps will only discharge small amounts of air and therefore are typically not used in process applications Valve Disc Open When condensate is present, trap remains in the open position allowing condensate to discharge. Steam pressure pushes the condensate thru the trap. Valve Disc Starting to Close When steam enters the trap, it creates an internal pressure above the disc that instantly forces the disc and seat to close tightly, preventing steam from escaping.  Valve Disc Closed Steam pressure above the disc holds the disc closed, trapping steam in the system. Trap will remain closed until the steam above the disc condenses, due to heat loss through the cap.  

  • Hướng Dẫn Lắp Đặt Bẩy Hơi Phao FTT, Watson Mcdaniel USA
  • LẮP ĐẶT VAN AN TOÀN
  • BẢNG NHIỆT ĐỘ, ÁP SUẤT VÀ NĂNG LƯỢNG CỦA HƠI BÃO HÒA

    02/09/2020

    Bảng nhiệt độ, áp suất, năng lượng, tỉ trọng của hơi bảo hòa (Saturated steam table) Áp Suất bar                                        kPa Nhiệt Độ °C Năng Lượng (Specific enthalpy) Thể tích m3/kg Nhiệt hiện (hf) kJ/kg Nhiệt Ẩn (hfg) kJ/kg Tổng Nhiệt (hg) kJ/kg 0.50 50 81.3 340.58 2,304.77 2,645.35 3.241 0.75 75 91.8 384.47 2,278.10 2,662.57 2.218 0.95 95 98.2 411.52 2,261.38 2,672.91 1.778 1.00 100 99.6 417.55 2,257.63 2,675.18 1.694 1.013 25 101.325 100.0 419.10 2,256.66 2,675.76 1.674 0 0 100.0 419.10 2,256.66 2,675.76 1.674 0.1 10 102.7 430.33 2,249.62 2,679.95 1.533 0.2 20 105.1 440.76 2,243.05 2,683.81 1.414 0.3 30 107.4 450.51 2,236.86 2,687.37 1.313 0.4 40 109.6 459.68 2,231.02 2,690.69 1.226 0.5 50 111.6 468.33 2,225.47 2,693.80 1.150 0.6 60 113.6 476.53 2,220.19 2,696.72 1.083 0.7 70 115.4 484.34 2,215.13 2,699.47 1.024 0.8 80 117.2 491.78 2,210.29 2,702.07 0.971 0.9 90 118.8 498.90 2,205.64 2,704.54 0.923 1.0 100 120.4 505.73 2,201.16 2,706.88 0.880 1.1 110 122.0 512.28 2,196.83 2,709.12 0.841 1.2 120 123.5 518.60 2,192.65 2,711.25 0.806 1.3 130 124.9 524.69 2,188.60 2,713.29 0.773 1.4 140 126.3 530.57 2,184.67 2,715.25 0.743 1.5 150 127.6 536.27 2,180.86 2,717.13 0.715 1.6 160 128.9 541.78 2,177.15 2,718.93 0.690 1.7 170 130.2 547.13 2,173.54 2,720.67 0.666 1.8 180 131.4 552.32 2,170.02 2,722.34 0.644 1.9 190 132.6 557.37 2,166.58 2,723.96 0.623 2.0 200 133.7 562.29 2,163.23 2,725.52 0.603 2.2 220 135.9 571.74 2,156.74 2,728.48 0.568 2.4 240 138.0 580.74 2,150.53 2,731.27 0.537 2.6 260 140.0 589.33 2,144.55 2,733.89 0.509 2.8 280 141.9 597.56 2,138.80 2,736.36 0.484 3.0 300 143.8 605.45 2,133.24 2,738.70 0.461 3.2 320 145.5 613.04 2,127.87 2,740.92 0.440 3.4 340 147.2 620.36 2,122.67 2,743.02 0.422 3.6 360 148.9 627.42 2,117.61 2,745.03 0.404 3.8 380 150.4 634.24 2,112.70 2,746.94 0.389 4.0 400 152.0 640.85 2,107.92 2,748.77 0.374 4.5 450 155.6 656.52 2,096.49 2,753.00 0.342 5.0 500 158.9 671.12 2,085.70 2,756.82 0.315 5.5 550 162.1 684.81 2,075.47 2,760.28 0.292 6.0 600 165.1 697.72 2,065.72 2,763.44 0.272 6.5 650 167.9 709.94 2,056.39 2,766.33 0.255 7.0 700 170.6 721.56 2,047.43 2,768.99 0.240 7.5 750 173.0 732.64 2,038.81 2,771.45 0.227 8.0 800 175.5 743.24 2,030.49 2,773.72 0.215 8.5 850 177.8 753.40 2,022.43 2,775.83 0.204 9.0 900 178.0 763.17 2,014.63 2,777.80 0.194 9.5 950 182.1 772.58 2,007.05 2,779.62 0.185 10.0 1,000 184.2 781.66 1,999.67 2,781.33 0.177 10.5 1,050 186.1 790.43 1,992.49 2,782.92 0.170 11.0 1,100 188.0 798.93 1,985.48 2,784.41 0.163 11.5 1,150 189.9 807.17 1,978.63 2,785.80 0.157 12.0 1,200 191.7 815.17 1,971.94 2,787.11 0.151 12.5 1,250 193.4 822.95 1,965.38 2,788.33 0.146 13.0 1,300 195.1 830.52 1,958.96 2,789.48 0.141 13.5 1,350 196.8 837.89 1,952.67 2,790.56 0.136 14.0 1,400 198.4 845.08 1,946.49 2,791.57 0.132 14.5 1,450 199.9 852.09 1,940.42 2,792.51 0.128 15.0 1,500 201.5 858.95 1,934.46 2,793.40 0.124 15.5 1,550 202.9 865.65 1,928.59 2,794.24 0.120 16.0 1,600 204.4 872.20 1,922.82 2,795.02 0.117 17.0 1,700 207.2 884.91 1,911.53 2,796.44 0.110 18.0 1,800 209.9 897.12 1,900.57 2,797.68 0.105 19.0 1,900 212.5 908.87 1,889.89 2,798.77 0.100 20.0 2,000 214.9 920.22 1,879.49 2,799.71 0.095 21.0 2,100 217.3 931.19 1,869.32 2,800.51 0.091 22.0 2,200 219.6 941.82 1,859.38 2,801.20 0.087 23.0 2,300 221.8 952.13 1,849.65 2,801.77 0.083