• Segmented flame tubes SICAFLEX® (EN)

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    • Segmented flame tubes SICAFLEX®

    Technical Information
    • Simple installation, even in existing radiant tube systems
    • Flame tubes can be made to any length by combining individual flame tube segments
    • Patented flame tube segment design allows flame tube to be bent
    • Reduced strain on radiant tubes due to light-weight design
    • Long service life due to ceramic material SiSiC which is resistant to high temperatures

    Edition 06.20 · EN
    03250778

    1 Application

    The segments can be interconnected to make a flame tube of any length.

    The bayonet joint of the individual segments allows adjustment to bent radiant tubes.

    SICAFLEX® in radiant tube on self-recuperative burner ECOMAX

    SICAFLEX® segmented flame tubes are used to guide hot flue gases in single ended radiant tubes in conjunction with a self-recuperative burner. The SICAFLEX® segmented flame tubes are interconnected using a bayonet joint. This connection allows for adjustment to flexures in metal radiant tubes, and slits in the flame tube from the dislocation of flame tube parts are avoided. The low weight of the SICAFLEX® segmented flame tubes places very little strain on the radiant tube.

    1.1 Application examples

    1.1.1 SICAFLEX® in horizontally fitted single ended radiant tubes

    The SICAFLEX® segmented flame tube is fitted inside the single ended radiant tube to guide the hot flue gases. The hot flue gases from the burner are routed through the internal SICAFLEX® segmented flame tube. The high outlet velocity of the combustion gases generates a pressure at the outlet of the ceramic burner tube, resulting in the recirculation of the flue gases between the segmented flame tube and the radiant tube. This results in a uniform radiant tube temperature and reduces the formation of NOx in the flame.

    1.1.2 SICAFLEX® in vertically fitted single ended radiant tubes

    In vertically fitted single ended radiant tubes, a cruciform spacer ensures optimum sizing of the recirculation gap between the segmented flame tube and the burner, see Cruciform spacer.

    2 Selection

    The dimensions of the SICAFLEX® segmented flame tube are adapted to the dimensions of the ceramic radiant tube SER-C as well as standard metallic radiant tubes.

    2.1 ProFi

    A web app selecting the correct product is available at www.adlatus.org.

    2.2 Versions

    The standard length for SICAFLEX® is 300 mm. Shortened segments in 50 mm increments are available for length adjustment:

    2.2.1 Standard combinations

    Radiant tubeSegmented flame tubeBurner
    SER-C 100/088SICAFLEX 100/088/084ECOMAX 0C
    SER-C 142/128SICAFLEX 142/127/123ECOMAX 1C
    SER-C 162/148SICAFLEX 162/147/143ECOMAX 2C
    SER-C 202/188SICAFLEX 202/186/182ECOMAX 3C

    Possible combinations SER / SICAFLEX

    radiant tube internal diameterSICAFLEX
    88 mm - 93 mm100/88/84
    94 mm - 126 mmOn demand
    127 mm - 132 mm142/127/123
    133 mm - 146 mm152/133/129
    147 mm - 156 mm162/147/143
    157 mm - 166 mm175/157/153
    167 mm - 185 mmOn demand
    186 mm - 200 mm202/186/182
    201 mm - 279 mmOn demand
    280 mm - 300 mm300/280/275
    > 300 mmOn demand

    2.3 Selection table

    OptionSICAFLEX 100/088/084SICAFLEX 142/127/123SICAFLEX 152/133/129SICAFLEX 162/147/143SICAFLEX 175/157/153SICAFLEX 202/186/182SICAFLEX 300/280/275
    Length [mm]-300, -250, -200-300, -250, -200, -150 -300, -250, -200-300, -250, -200, -150-300, -250, -200-300, -250, -200, -150-300, -200
    Cut endF, MF, MF, MF, MF, MF, MF, M
    SICAFLEX® external diameter different from standardDDDDDDD
    Special version with 2 cams on the circumference for horizontal installationHH
    Special versionZZZZZZZ

    Order example

    SICAFLEX 142/127/123-250M

    2.4 Type code

    SICAFLEX
    Segmented flame tube
    100-300
    Size
    /088-280
    Min. radiant tube internal diameter [mm]
    /084-275
    SICAFLEX external diameter [mm]
    -150-300
    Length [mm]
    F
    Narrow end cut off
    M
    Wide end cut off
    D
    SICAFLEX® OD different from standard
    H
    Special version with 2 cams on the circumference for horizontal installation
     
     

    3 Project planning information

    3.1 Flame tube length

    Legend

    • W = radiant tube length
    • G = burner length
    • D1 = recirculation gap
    • V1 = deflector gap
    • C1 = flame tube length
    • n = number of SICAFLEX® segments
    • di = internal diameter of radiant tube

    The individual SICAFLEX® segments are interconnected using bayonet joints. To avoid short-circuiting, the wide ends of the segments must be facing the burner.

    Calculation

    Flame tube length C1 is the result of radiant tube length W minus burner lengthG, recirculation gap D1 and deflector gap V1.
    C1 = W - G - D1 - V1
    When using standard elements (300 mm), a flame tube length C1 of n × 250 mm + 50 mm is possible. Other lengths are possible in 50 mm increments using shortened segments, see Dimensions.
    The deflector gapV1 should equal 0.5 to 1.5 times the internal diameter di of the radiant tube. When using radiant tube SER-C, the size of the deflector gap V1 should equal 0.7 to 1.5 times the internal diameter di of the radiant tube. If the deflector gap is too big, this can lead to cold radiant tube ends. If the gap is too small, this restricts the backflow.

    4 Accessories

    4.1 Cruciform spacer

    For installation of the SICAFLEX® segmented flame tube in vertical radiant tubes, see SICAFLEX® in vertically fitted single ended radiant tubes .
    The cruciform spacer ensures optimum sizing of the recirculation gap between the segmented flame tube and the burner.
    Material: refractory clay.
    Available on request in different sizes depending on the SICAFLEX® sizes and different heights.

    5 Technical data

    Material: SiSiC

    Max. application temperature: 1350°C.

    5.1 Dimensions

    Ø D Ø U1 Weight*
    [mm] [mm] [kg]
    SICAFLEX 100/88/84 84 (± 1) 67 0.7
    SICAFLEX 142/127/123 123 (± 1) 98 1.1
    SICAFLEX 152/133/129 129 (± 1) 98 1.2
    SICAFLEX 162/147/143 143 (± 1) 114 1.3
    SICAFLEX 175/157/153 153 (± 1) 121 1.5
    SICAFLEX 202/186/182 182 (± 1) 143 1.8
    SICAFLEX 300/280/275 275 (+ 1/- 3.5) 208 3.0

    * SICAFLEX..-300