Hypertherm HT200LHF-200 Volt HySpeed - Manual (Page 35)

INSTALLATION
3-2 HySpeed HT2000LHF
Instruction Manual
6
Caution: Gas supply pressures not within the parameters outlined in Section 2 can cause
poor cut quality, poor consumable life, and operational problems.
If the purity level of the gas is too low or if there are leaks in the supply hoses or
connections,
• Cut speeds can decrease
• Cut quality can deteriorate
• Cutting thickness capability can decrease
• Parts life can shorten
Caution: Only hose designed to carry oxygen may be used for oxygen lines
.
The LHF system can cut with air, oxygen, nitrogen or argon-hydrogen as the plasma gas, and use air, nitrogen or
carbon dioxide as the shield gas.
Air may be supplied from cylinders, a liquid supply, or from an on-site compressor. Hypertherm recommends a
three-stage coalescing filtration system when using air as a supply gas. See the appendix section for suggested
filtration.
Other gases may be supplied from cylinders or liquid storage tanks.
Gas Supply Plumbing
If making hard plumbing connections, avoid using iron pipe. Never use PTFE tape on any joint preparation. After
installation, pressurize the entire system and check for leaks.
For flexible-hose systems, use a hose designed for inert gas to carry air, nitrogen, argon-hydrogen or carbon-
dioxide.
WARNING
Cutting with oxygen as the plasma gas can cause a potential fire hazard due to the oxygen-
enriched atmosphere that it creates. As a precaution, Hypertherm recommends that an exhaust
ventilation system be installed when cutting with oxygen.
Note: When cutting with oxygen as the plasma gas, nitrogen must also be connected to the gas console to
achieve the proper oxygen/nitrogen mixtures in the preflow and cut flow conditions.