Dia-Flo Weir Diaphragm Valve

Dia-Flo diaphragm valves are engineered for tough applications in the chemical processing, mining, power generation, pulp and paper, and water treatment industries.  Dia-Flo weir-type diaphragm valves are utilized to handle media which is corrosive, erosive, or contains solids which tend to clog other types of valves.  The weir-style diaphragm valve is used effectively as a control valve or where manual throttling of a fluid is desired.

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  • Bubble tight shut-off – Tight shut-off across weir is independent of line pressure.
  • Bonnet isolation – Separates working components of valve from process fluids.
  • Packing-less design – No packing gland adjustments or stem seal leaks of dangerous media.
  • In-line maintenance – Bonnet assembly can be removed without taking valve out of line.
  • Streamlined fluid passage – Body design has minimal pockets or cavities where media can accumulate or entrap.


Sizes: 1/2-12” (DN15-300)
Temperature Rating: -30 – 350˚F (-34 – 177˚C)
Pressure Rating: Vacuum – 200 psi (1380 kpa)