Unique DUALLAST® FRP CONSTRUCTION Assures Stronger and More Corrosion Resistant Products at Competitive Costs

NSF Tested and Certified

With an inner liner of PVC (or other inert material) and an outer layer of FRP (fiberglass reinforced plastic) new DUALLast® construction extends service life even under the most severe operating conditions.

The key is Duall‘s permanent bonding system which forms a laminate that builds on the strength of FRP and the chemical resistance of PVC. Common causes of material failure such as corrosion, delamination, wicking, crazing, blistering, temperature extremes, impact, etc., are all readily controlled. DUALLAST® FRP CONSTRUCTION demonstrates Duall‘s capability to engineer new processes and products to assure more value for your investment.

Advantages

• PVC corrosion barrier is a minimum 3/16" thick or 187 mils, which is nearly twice the thickness of the 100 mil resin typically specified with fiberglass vessels.
  
• Homogenous inner layer of thermoplastic material is not subject to costly weeping and crazing failures that can be associated with FRP construction. A PVC inner liner subjected to a 50% NaOH solution offers considerably more resistance and service life than a typical vinyl ester resin can provide. If a wet scrubber’s chemistry is neglected or not properly maintained, sodium hypochlorite solutions can turn acidic forming extremely corrosive hypochlorous acid. This aggressive acid quickly attacks most fiberglass resins.
  
• DUALLast® is approved by the National Sanitation Foundation
  for use in food grade and potable water applications such as
  degasifiers for water treatment plants. Design engineers prefer this
  material, since fiberglass vessels without thermoplastic liners may
  leach uncured resins into potable water supply.
  
• Exceptional quality assurance: With an inner thermoplastic liner,
  the vessel can be spark-tested to ensure leak-proof construction
  which is not always assured in total FRP fabrications.
  
• Temperature tolerance: DUALLast® construction provides additional
  process temperature service approximately 20% higher than
  thermoplastic only construction.
  
• UV resistance: The exterior FRP shell is formulated to provide
  exceptional weatherability while still enabling the user to enjoy the
  corrosion resistant benefits of thermoplastics.
  
• Structural integrity: DUALLast® constructed equipment can be cost
  effectively designed to meet the most stringent seismic and wind
  load requirements.