MAXI Check I

Dual Function Ball Check Valve

MAXI‐Check I Dual Function Ball Check Valves are designed specifically for slurries, dewatering or high pressure applications. The large port design prevents clogging while the HI‐WEAR seat offers a large sealing area.

The valve is normally located on pump discharge. In static situation the ball is held in the seat by back pressure.  When the pump starts and pressure equalises, the ball then moves up into the ball bonnet. There it is free to move and rotate on the media as it flows through the valve hence the ball will not attract scale build up.  As the pump/media stops flowing, the ball falls into the seat. It is once again held in the closed position by the back pressure. The hand wheel can then be wound to the closed position where the ball is mechanically held in the seat to create an isolation valve.

The ball should show no signs of wear due to the fact it is free to roll or rotate on the flow and the seat is designed with minimum exposure to wear factors.

The MAXI-Check I Dual Function Ball Check Valve is an ideal for plant designers and operators. It is especially helpful when an application requires a commercially available abrasion and corrosion resistant check valve and isolation valve. The Maxi-Check I is fit for relatively high (20, 50, 100 or 150 bar) pressures. These are commonly associated with pumping of turbid water from open-cut or underground mines.

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  • Simple construction allows for ease of maintenance
  • The seat & seal are replaceable on site
  • Primary seat is 304 stainless steel as standard‐other materials available on request
  • Wear resistant secondary seal allows drip tight sealing under all conditions in high pressure valves
  • Body fabrication available in carbon or stainless steel
  • Internal lining in hot vulcanised natural black rubber, EPDM or urethane on request
  • Full bore design
  • Design Standard:
    • ASME B16.34‐2009
    • ASME B31.3‐2002
    • AS4037‐1999
  • Spindle is 304 SS as standard with open/close indicators. Limit switch pack is an option
  • Manufactured in Australia
  • Abrasive blast cleaned and coated in 2 pack epoxy paint
  • Pressure ratings ANSI Class 150, 300, 600 and 900


  • Mine or pit dewatering
  • Slurry and tailings
  • Power Generation ash disposal
  • Pulp and paper
  • Sand and mineral processing
  • Environmental and effluent


ball check valves


Actuation Option

  • Hand wheel
  • Pneumatic
  • Hydraulic
  • Electric
  • Bevel Gear box