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Qualifications and Requirements
Shield-water requirements (VWI and OptiMix)
If you use water as a shield fluid, use the following water pressure requirements, flow requirements, and water-purity guidelines.
Additional regulator requirement for shield water when pressure is high
Water pressure regulators are built into the VWI™ and OptiMix™ gas connect consoles.

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Qualifications and Requirements
- Document requirements
- Operator qualifications
  A person is considered qualified to operate the cutting system if he or she is trained and knowledgeable about cutting system equipment construction, operation, and work methods, and about how to recognize and avoid hazards that can be present with certain cutting system equipment or work methods.
- Qualifications of service personnel
  It can be hazardous to do service and maintenance on industrial cutting systems and equipment.
- System electrical requirements
- Process-gas requirements for all gas connect consoles
  You must supply the process gases for your cutting system.
- Shield-water requirements (VWI and OptiMix)
  If you use water as a shield fluid, use the following water pressure requirements, flow requirements, and water-purity guidelines.
  - Plumbing and hose requirements for shield water
  - Additional regulator requirement for shield water when pressure is high
    Water pressure regulators are built into the VWI™ and OptiMix™ gas connect consoles.
  - Remove shield water from the gas connect console
    If your plasma cutting system uses shield water and is stored in ambient temperatures at or below 0ºC (32ºF), Hypertherm® recommends that you use these steps to remove shield water. These steps are for cutting systems that have a VWI™ or OptiMix™ gas connect consoles.
- Torque specifications for gas or water plumbing and hose connections
  For the best results, use the recommended torque specifications for plumbing and hose fittings.
- Coolant requirements
  Add the correct type and amount of coolant before you operate the plasma cutting system.
- Requirements to put system components in position
- Torch mounting bracket requirements
  Make sure to use a torch mounting bracket that obeys the requirements for XPR® torches.
- Torch lifter requirements
  Use a torch lifter that has the correct weight capacity for XPR® torches.
- CNC requirements for plasma cutting systems
  There are specific Computer Numerical Control (CNC) features that are necessary for integration with plasma cutting systems.
- Recommended grounding and shielding
  It is important to use grounding and shielding best practices when you set up a plasma cutting system. This can minimize problems related to Electromagnetic Interference (EMI), or electrical noise.
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Additional regulator requirement for shield water when pressure is high

Water pressure regulators are built into the VWI™ and OptiMix™ gas connect consoles.

Additional water pressure regulators are necessary only when the shield-water pressure is more than 7.92 bar (115 psi).