Easco Boiler Corp. | Field Erected & Packaged Quality Steel Boilers A Division of THE A.L. EASTMOND & Sons Corporation
Scotch Marine Boilers
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Item # FPS-450, MODEL FPS - FOUR PASS SCOTCH MARINE BOILER


EASCO Four pass scotch marine design has higher thermal efficiency, up to 3% more efficient than a 3-pass boiler design. EASCO FPS model is wet back fire tube is designed to increase longevity and enhanced durability, has larger steam space and disengaging area. Available in 15psig steam and up to 160psig water design, submersible tank less Domestic Hot water coils are optional.

  • High Efficiency
  • Low Heat Release
  • Low Furnace Pressure
  • 5 Square Feet of Heating Surface per Boiler Horsepower
  • Large Steam Space and Disengaging Area





  • Boiler Rating  · Characteristic Data  · Boiler Dimensions  · Boiler Service Connection Locations  · Boiler Service Connection Sizes

    Boiler Rating

    Horse Power

    450 bhp

    Steam or Hot Water

    15,064 mbh

    Steam, @ 212 F

    15,525 pph

    Natural Gas, @ 1,000 btu/ft3

    18,370 cfh

    Light Oil, @140,000 btu/gal

    129.60 gph

    Heavy Oil, @ 150,000 btu/gal

    122.5 gph


    Characteristic Data

    Heating Surface, Fireside

    2,250 sf

    Furnace Volume

    158.6 cf

    Furnace Heat Release Rate

    115,798 bcfh

    Steam Disengaging Area

    100.4 sf

    Steam Space

    105.3 cf

    Water Content, Steam Application

    2,647 gal

    Water Content, Water Application

    3,435 gal

    Shipping/Dry Weight, Approx.

    30,800 lb

    Operating/Wet Weight, Approx.

    59,400 lb


    Boiler Dimensions

    A - Overall Length

    View
    287 9/16 in

    A' - Overall Length w/o Burner

    View
    24315/16 in

    B - Shell Length

    View
    204-1/8 in

    C - Tube Removal Clearance

    View
    210-1/8 in

    D - Rear Door Swing Clearance

    View
    59-3/4 in

    E - Platform Length

    View
    68-5/8 in

    F - Skid Length

    View
    254-1/2 in

    G - Fr. Saddle Location

    View
    14 in

    H - Distance Between Saddles

    View
    161-7/8 in

    I - Saddle Side Width

    View
    10 in

    J - Overall Width

    View
    113-1/2 in

    J' - Overall Width, w/o Trims

    View
    95-1/8 in

    K-Saddle Front Width

    View
    72 in

    L - Overall Height

    View
    126-5/8 in

    M - Normal Water Line

    View
    84-7/16 in

    N - Boiler Center Height

    View
    57-7/16 in

    0 - Furnace Center Height

    View
    35-15/16 in

    P - Shell Bottom Clearance

    View
    12 in

    Q - Skid Height

    View
    6 in


    Boiler Service Connection Locations

    R - Supply C.L. to Shell Front End

    View
    60 in

    S-Supply Height

    View
    108-7/8 in

    T - Return C.L. to Shell Front End

    View
    144 in

    U - Return Height

    View
    21 1/16 in

    V - Flue Outlet C.L. to Shell Front End

    View
    13 in

    W - Flue Outlet Height

    View
    107-3/4 in


    Boiler Service Connection Sizes

    a - Supply, Steam/Hot Water

    View
    12/8 NPS

    b - Flue Outlet

    View
    24 in

    c - Safety Valves

    View
    3 NPT

    d - Control Header

    View
    1 NPT

    e - Surface Blowdown

    View
    2-1/2 NPT

    f - Washout

    View
    2-1/2 NPT

    g - Return & FW, Steam/Hot Water

    View
    6/8 NPS

    h - Bottom Blowdown

    View
    2-1/2 NPT

    i - Aquastat

    View
    3/4 NPT

    j - Oil Preheater, Optional

    View
    2-1/2 NPT

    k - Top inspection/Manhole Access

    View
    12x16 NPT


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     MORE IMAGES 

    ·  Model FPS Drawing 1

    ·  Model FPS Drawing 2


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