Hypertherm 11241 How to Repair a KMT Style On or Off Valve Using Kit Instruction Manual

June 9, 2024
Hypertherm

Hypertherm 11241 How to Repair a KMT Style On or Off Valve Using Kit

Hypertherm 11241 How to Repair a KMT Style On or Off Valve Using
Kit

INTRODUCTION
Hypertherm is in no way affiliated with the above mentioned manufacturer.

TOOLS:
1-1/4″ wrench (1)

PARTS

  • Repair Kit #11241 (1)
  • Valve Stem #11102 (included in kit) (1)
  • O-ring #11240 (included in kit) (1)
  • Seat #11099 (included in kit) (1)
  • Brass Back-up Ring #11104 (included in kit) (1)
  • Seal Assembly #11100 (included in kit) (1)
  • Stainless Steel Back-up Ring #12733 (1)
  • Actuator #12089 (1)
  • High-Pressure Gland Fitting #12347 (1)
  • Valve Body #11320 (1)
  • Nozzle Tube #11436 (1)
  • Blue Goop #11111 (1)
  • Isopropyl Alcohol (1)

Repairing

Step 1 — How to Repair a KMT Style On/Off Valve Using Kit #11241

Hypertherm 11241 How to Repair a KMT Style On or Off Valve Using Kit
1

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 valve stem from the seat.

Step 2

Hypertherm 11241 How to Repair a KMT Style On or Off Valve Using Kit
2

  • The valve components can be replaced with the valve body mounted to the table.
  • Loosen the high-pressure gland fitting using a 1-1/4″ wrench.
  • Turn the air to the actuator OFF at the controls.

Step 3

Hypertherm 11241 How to Repair a KMT Style On or Off Valve Using Kit
3

  • Disconnect the air line from the actuator.
  • Unthread the actuator from the valve body.
  • Remove all the valve components from the valve body with the included dowel.

Step 4

Hypertherm 11241 How to Repair a KMT Style On or Off Valve Using Kit
4

  • Thoroughly clean the interior of the valve body with isopropyl alcohol or a similar cleaning agent before replacing the components.
  • Visually inspect the top and bottom of the valve bore for cracks/blemishes. If excessive wear or cracks are visible, replace the valve body.
  • Slide the O-ring on to the point of the valve stem.

Step 5

Hypertherm 11241 How to Repair a KMT Style On or Off Valve Using Kit
5

  • Slide the stainless steel back-up ring on to the valve stem point with the chamfer side towards the O-ring.
  • Slide the brass back-up ring on to the valve stem point with the chamfer side away from the stainless steel back-up ring.
  • Put the hoop on the high-pressure seal with the sharp edge of the hoop towards the seal.

Step 6

Hypertherm 11241 How to Repair a KMT Style On or Off Valve Using Kit
6

  • Slide the hoop and the high-pressure valve seal onto the valve stem with the hoop towards the brass back-up ring.
  • Apply the high-pressure lubricant to the outside diameter of the high-pressure valve seal.
  • Put the point of the valve stem into the valve body.

Step 7

Hypertherm 11241 How to Repair a KMT Style On or Off Valve Using Kit
7

  • Push the valve stem with the dowel until it bottoms out.
  • Apply Blue Goop to the actuator threads.
  • Thread (hand tighten) the actuator into the top of the valve body until it bottoms out.

Step 8

Hypertherm 11241 How to Repair a KMT Style On or Off Valve Using Kit
8

  • Reconnect the air line to the top of the actuator.
  • Turn the air to the actuator ON at the controls.
  • Apply Blue Goop to all surfaces of the seat.

Step 9

Hypertherm 11241 How to Repair a KMT Style On or Off Valve Using Kit
9

  • Put the seat into the bottom of the valve body.
  • Clean the high-pressure gland fitting threads and at the top of the nozzle tube of all Blue Goop.
  • Reapply Blue Goop to the threads of the high-pressure gland fitting and at the top of the nozzle tube.

Step 10

Hypertherm 11241 How to Repair a KMT Style On or Off Valve Using Kit
10

  • Thread the high-pressure gland fitting into the bottom of the valve body.
  • Tighten the high-pressure gland fitting using a 1-1/4″ wrench.
  • Turn the air to the actuator OFF at the controls.

Step 11

Hypertherm 11241 How to Repair a KMT Style On or Off Valve Using Kit
11

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

References

Read User Manual Online (PDF format)

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