Hypertherm - Cut with Confidence

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Always make sure all high-pressure water has been removed from the valve by the following machine manufacturers' safety instructions. Failure to do so can cause severe injury or death. Turn OFF all water pressure to the on/off valve.
  • Always make sure all high-pressure water has been removed from the valve by the following machine manufacturers' safety instructions. Failure to do so can cause severe injury or death.

  • Turn OFF all water pressure to the on/off valve.

  • Turn the on/off valve ON to raise the poppet stem from the high-pressure seat.

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The valve kit components can be replaced with the  valve body in the mounting collar. Unthread the nozzle tube from the valve body using a 3/4" and 7/8" wrench.
  • The valve kit components can be replaced with the valve body in the mounting collar.

  • Unthread the nozzle tube from the valve body using a 3/4" and 7/8" wrench.

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Turn the air to the actuator OFF at the controls. Disconnect the air tube from the actuator. Unthread the actuator from the valve body using a 1-1/8" wrench.
  • Turn the air to the actuator OFF at the controls.

  • Disconnect the air tube from the actuator.

  • Unthread the actuator from the valve body using a 1-1/8" wrench.

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Remove the old valve components from the valve body with the included dowel. Thoroughly clean the interior/exterior of the valve body with isopropyl alcohol or a similar cleaning agent before replacing the components. Visually inspect the top and bottom of the bore for cracks/blemishes.  If excessive wear or cracks are visible, replace the   valve body.
  • Remove the old valve components from the valve body with the included dowel.

  • Thoroughly clean the interior/exterior of the valve body with isopropyl alcohol or a similar cleaning agent before replacing the components.

  • Visually inspect the top and bottom of the bore for cracks/blemishes. If excessive wear or cracks are visible, replace the valve body.

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With the O-ring towards the point of the poppet stem, slide the high-pressure valve seal on to the poppet stem Apply a high-pressure lubricant or a similar one(11136) to the outside diameter of the high pressure valve seal. Slide the back-up ring on to the poppet stem behind the high-pressure valve seal.
  • With the O-ring towards the point of the poppet stem, slide the high-pressure valve seal on to the poppet stem

  • Apply a high-pressure lubricant or a similar one(11136) to the outside diameter of the high pressure valve seal.

  • Slide the back-up ring on to the poppet stem behind the high-pressure valve seal.

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Put the poppet stem, with the point down, at the top of the valve body. Use the dowel to push the poppet stem down until the back-up ring is flush with the top of the bore. Apply  Blue Goop to the top threads of the valve body.
  • Put the poppet stem, with the point down, at the top of the valve body.

  • Use the dowel to push the poppet stem down until the back-up ring is flush with the top of the bore.

  • Apply Blue Goop to the top threads of the valve body.

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Apply Blue Goop to the valve screw threads. Thread the valve screw into the valve body until it bottoms out. With the dowel, push the poppet stem point flush with the bottom of the bore.
  • Apply Blue Goop to the valve screw threads.

  • Thread the valve screw into the valve body until it bottoms out.

  • With the dowel, push the poppet stem point flush with the bottom of the bore.

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Thread (hand tighten) the actuator to the top of the valve body. Reconnect the air line to the top of the actuator. Turn the air to the actuator ON to relieve the pressure from the poppet stem.
  • Thread (hand tighten) the actuator to the top of the valve body.

  • Reconnect the air line to the top of the actuator.

  • Turn the air to the actuator ON to relieve the pressure from the poppet stem.

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Apply Blue Goop to all surfaces of the high-pressure seat. Put the high-pressure seat into the bottom of the valve body. Put the O-ring behind the high-pressure seat so it will be held in place.
  • Apply Blue Goop to all surfaces of the high-pressure seat.

  • Put the high-pressure seat into the bottom of the valve body.

  • Put the O-ring behind the high-pressure seat so it will be held in place.

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Thoroughly clean the nozzle tube of all Blue Goop. Reapply Blue Goop to the threads of the nozzle tube. Thread the nozzle tube into the bottom of the valve body.
  • Thoroughly clean the nozzle tube of all Blue Goop.

  • Reapply Blue Goop to the threads of the nozzle tube.

  • Thread the nozzle tube into the bottom of the valve body.

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Tighten the nozzle tube to the valve using 3/4" and 7/8" wrench. Turn the air to actuator OFF to set the poppet stem into the seat. Apply water pressure to the valve assembly to verify there are no leaks.
  • Tighten the nozzle tube to the valve using 3/4" and 7/8" wrench.

  • Turn the air to actuator OFF to set the poppet stem into the seat.

  • Apply water pressure to the valve assembly to verify there are no leaks.

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Quickly cycle the valve on and off a few times to purge the system of all contaminants before installing the cutting head. Re-install the cutting head and continue the cutting process.
  • Quickly cycle the valve on and off a few times to purge the system of all contaminants before installing the cutting head.

  • Re-install the cutting head and continue the cutting process.

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Finish Line

One other person completed this guide.

Adam Dumas

Member since: 05/20/2013

36 Guides authored

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