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400 Series

400 Series


DOROT’S 400 Series, state-of-the-art automatic control valves are designed to withstand the most demanding requirements of water system control.
This Engineering Data guide will asist the reader in the selection of the optimal DOROT Series 400 valve.

Features & Advantages

  • Operates automatically off-line pressure.
  • Heavy-duty, nylon-reinforced diaphragm isolates top chamber operating pressure from bottom chamber line pressure.
  • Rectangular-shaped, soft seat seal provides drip-tight Class VI closure.
  • Diaphragm assembly guided top and bottom.
  • Throttling seat retainer for flow and pressure stability.
  • Easily maintained without removal from the line.
  • Diaphragm replaced without removing internal stem assembly.
  • Replaceable seat ring.
  • Alignment pins assure proper reassembly after maintenance.
  • Center-tapped bonnet facilitates installation of position indicator or valve-actuated switches.
  • Ductile iron and steel valves are epoxy-coated inside and out, for maximum corrosion protection.
  • Valves are factory tested.
  • Valves are serial numbered and registered to facilitate replacement parts and factory support.
  • Allows valve to close instantaneously upon pressure reversal, eliminating reverse flow.
  • Split spool design.
  • Lift check can be added as a feature to existing valves by replacing spool assembly.
  • Valve must be mounted with stem in vertical position.