K-050 |Reduced Bore, Air & Vacuum Air Valve


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A.R.I K-050 Series is a reduced bore Air & Vacuum Air Valve. Valve operation includes venting air from a filling pipeline and also vacuum breaking (air intake) of a draining pipeline, to optimizie pipeline hydraulic efficiency and flow.



Product Features

  • Flow cross-sections equal or greater than nominal port area -maximum flow.
  • Reliable operation - reduces water hammer impact.
  • Saves energy and increases system efficiency - high capacity air discharge.
  • Dynamic design - high capacity air discharge, no premature closure.
  • Installation and maintenance - easy to install and simple to maintain.
  • Unique orifice seat / seal design - long-term maintenance-free operation.
  • Screen protected outlet - prevents intrusion of insects and debris.
  • All internal operating parts – stainless steel 316, polymers and rubber materials - non-corrosive and durable

Application Range

  • Size range 2”–12”
  • Sealing pressure range:
    • A.R.I. K-050 - 0.2 - 16 bar (PN16)
    • A.R.I. K-052 -0.2 - 25 bar (PN25)
    • A.R.I. K-055 -0.2 - 40 bar (PN40) Testing pressure - 1.5 times maximum working pressure

  • Temperature - Maximum working temperature: 60° C.
  • Maximum intermittent temperature: 90° C.
  • Valve coating - Fusion bonded epoxy coating in compliance with standard DIN 30677-2


  • Pump stations: downstream of the pump and the check valve
  • Downstream and upstream of shut-off valves
  • Downstream of deep-well pumps
  • On long constant-sloped pipeline segments
  • At peaks along the pipeline and at peaks relative to hydraulic gradient
  • At end lines
  • Before water meters
  • On strainers and filters
  • Municipal and industrial water conveyance systems

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Last Updated on: Thursday, 23 November 2023