Hypertherm - Cut with Confidence

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Image 1/2: Turn OFF all water pressure to the on/off valve Image 2/2: Turn the on/off valve ON to raise the poppet stem from the [http://www.accustream.com/all-products/11141.html|high-pressure seat].
  • 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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Image 1/2: Unthread the [http://www.accustream.com/all-products/11358-4.html|nozzle tube] from the valve body using a 3/4" and 7/8" wrench. Image 2/2: Unthread the [http://www.accustream.com/all-products/11358-4.html|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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Image 1/3: Disconnect the air tube from the actuator. Image 2/3: Unthread the actuator from the valve body using 1-1/8" wrench. Image 3/3: Unthread the actuator from the valve body using 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 1-1/8" wrench.

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Image 1/3: Thoroughly clean the interior/exterior of the valve body with isopropyl alcohol or a similar cleaning agent before replacing the components. Image 2/3: Visually inspect the top and bottom of the bore for cracks/blemishes.  If excessive wear or cracks are visible, replace the [http://www.accustream.com/all-products/11272.html|valve body]. Image 3/3: Visually inspect the top and bottom of the bore for cracks/blemishes.  If excessive wear or cracks are visible, replace the [http://www.accustream.com/all-products/11272.html|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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Image 1/3: With the O-ring down, slide the [http://www.accustream.com/all-products/11276.html|high-pressure valve seal] onto the poppet stem behind the bushing stem. Image 2/3: Apply a high-pressure lubricant or similar ([http://www.accustream.com/all-products/11136.html|11136]) to the outside diameter of the high-pressure valve seal. Image 3/3: Apply a high-pressure lubricant or similar ([http://www.accustream.com/all-products/11136.html|11136]) to the outside diameter of the high-pressure valve seal.
  • Put the bushing stem onto the poppet stem.

  • With the O-ring down, slide the high-pressure valve seal onto the poppet stem behind the bushing stem.

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

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Image 1/3: Put the poppet stem, with the point down, at the top of the valve body. Image 2/3: Use the dowel to push the poppet stem down until the back-up ring is flush with the top of the bore. Image 3/3: Use the dowel to push the poppet stem down until the back-up ring is flush with the top of the bore.
  • Put the back-up ring with the concave side towards the high-pressure seal on the poppet stem behind the high-pressure seal.

  • 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.

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Image 1/3: Thread (hand tighten) the actuator to the top of the valve body. Image 2/3: Reconnect the air line to the top of the actuator. Image 3/3: Reconnect the air line to the top of the actuator.
  • Apply Blue Goop to the top of the valve body threads.

  • Thread (hand tighten) the actuator to the top of the valve body.

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

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Image 1/3: Put the high-pressure seat at the bottom of the valve body. Image 2/3: Put the [http://www.accustream.com/all-products/11145.html|O-ring] behind the high-pressure seat so it is held in place. Image 3/3: Put the [http://www.accustream.com/all-products/11145.html|O-ring] behind the high-pressure seat so it is held in place.
  • Apply Blue Goop to all surfaces of the high-pressure seat.

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

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

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Image 1/3: Thoroughly clean the nozzle tube of all the Blue Goop. Image 2/3: Reapply Blue Goop to the threads of the  nozzle tube. Image 3/3: Reapply Blue Goop to the threads of the  nozzle tube.
  • Turn the air to the actuator ON to relieve the pressure from the poppet stem.

  • Thoroughly clean the nozzle tube of all the Blue Goop.

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

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Image 1/3: Tighten the nozzle tube to the valve body using 3/4" and 7/8" wrench. Image 2/3: Turn the air to the actuator OFF to set the poppet stem into the high-pressure seat. Image 3/3: Turn the air to the actuator OFF to set the poppet stem into the high-pressure seat.
  • Thread the nozzle tube into the bottom of the valve body.

  • Tighten the nozzle tube to the valve body using 3/4" and 7/8" wrench.

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

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Image 1/3: Quickly cycle the valve on and off a few times to purge the system of all contaminants before installing the cutting head. Image 2/3: Reinstall the cutting head and continue the cutting process. Image 3/3: Reinstall the cutting head and continue the cutting process.
  • Apply water pressure to the valve assembly to verify there are no leaks.

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

  • Reinstall the cutting head and continue the cutting process.

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Finish Line

Adam Dumas

Member since: 05/20/2013

36 Guides authored

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