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  • Abrasives
  • Conveyors, Belting, Linings and Rubber
  • Cutting Tools & Metalworking
  • General Mill Supplies -- MRO
  • Hose, Tubing & Fittings
  • Janitorial & Facility Maintenance
  • Machinery
  • Lawn, Garden & Outdoor Equipment
  • Paints, Equipment & Supplies
  • Pipe, Valves & Fittings -- PVF
  • Power Transmission -- PT
  • Safety & Security
  • Tools
  • While Supplies Last
  • Office Supplies

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  • Parker Hannifin
  • Milwaukee Electric Tool
  • Dodge / Reliance
  • J H Williams
  • Porter Paints
  • Dixon
  • Flexco
  • Dresser Industries
  • Wooster
  • Ridge Tool
  • View all Brands

    • Air Relief Valves

    Air Relief Valve function to release air pockets that collect at each high point of a full pressured pipeline. An air release valve can open against internal pressure, because the internal lever mechanism multiplies the float force to be greater than the internal pressure.

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