Tejas Scotch Marine Firetube Boilers:

Whether you need low or high pressure boilers, Williams & Davis Boilers delivers reliable, A.S.M.E, National Board stamped and insurance inspected equipment.  Welded construction enables pressure to 350 psig steam or 160 psig water. All tubes are expanded and beaded, and no tubes are welded on standard units.

All units are completely wired and piped for service connections, and are fire-tested to MAXIMUM operating pressure prior to shipment. Boilers are constructed in compliance with A.S.M.E. code and CSD-1 controls; Factory Mutual (FM), Industrial Risk Insurance (IRI), NFPA-8501 and municipal code compliance is available per customer requirements.

This large combustion area is lined with quality refractory material for longer life and economical operation. The rear door is hinged and has a long life, air-tight seal for more efficient operation. This type of construction enables fast, easy and economical inspection of the combustion chamber and rear tube sheet. An 18" inspection door is standard.
 

KEY FEATURES:

1. Curved arch and large refractory lined combustion chamber, dry back design.  Quality refractory installed at factory aids combustion and contains heat, increasing the overall efficiency.  There are no hot spots on two pass design.
   
   

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2. Shell is pressure vessel quality steel, welded construction, x-rayed on all boilers.
    
3. Furnace is pressure vessel quality steel welded construction x-rayed in all boilers.
    
4. Boiler tubes are full 12 gauge (.109) material 2 1/2" diameter for faster steaming and more efficient operation, due to even distribution of fuel tubes are evenly spaced 7/8" or more apart.
    
5. Heatmizers are fuel saving equipment supplied with all W & D package scotch marine boilers.  To insure greater energy savings in operational costs.  Warranted for five (5) years, engineered for each boiler for equal heat distribution over entire unit and maximum heat transfer.
    
6. Blow-off valve(s) supplied with all package boilers.  Two valves on 125 psig or higher.  A second opening is on bottom rear of all size 80 and larger.  Blow-off drain from water level control is piped to main boiler blow-off piping.
    
7. Stack thermometer is supplied on W & D scotch marine boilers is guaranteed not to exceed 100 degrees F. Net readings above steam temperature.