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  1. MARKFLOW

    DB&B VALVES

    Go to www.olivervalves.com, they have a kick ass D.B & B, using two balls in one ANSI B16.10 Body length. It works real well. MARKFLOW
  2. MARKFLOW

    Valve Port Terminology Clarification

    Full Port is "true full", and can be a relative term based on the I.D. of your Pipe (Schedule of your pipe). Regular Port, or Standard Port is one pipe size down. Reduced Port is (2) pipe sizes down. MARKFLOW
  3. MARKFLOW

    Valve Trim Design / Material Selection

    Contact www.mogas.com. Mogas purchased a patented gas control valve trim for ball valves last winter, called Flexstream. It has some very unique features. MARKFLOW
  4. MARKFLOW

    Can Bi-directional high performance butterfly valve supplies dead end

    Yes they can, but you MUST specify as many of the manufacturers do not do it as standard in "both" directions. They must change something, add something, or test differently. MARKFLOW
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