LN - covers with bearing bodies, plates and inter-stage plate - grey cast iron, impellers - malleable iron, shaft and body - stainless steel
YC - covers with bearing bodies, plates and inter-stage plate, impellers, shaft and body – stainless chromium-nickel steel.
ZC - covers with bearing bodies, plates and inter-stage plate, impellers, shaft and body - stainless chromium-nickel-molybdenum steel
TC – covers with bearing bodies, plates and inter-stage, impellers, shaft and body – titanium
AC – covers with bearing bodies, plates and inter-stage, impellers, shaft and body – nickel alloy
Selection of vacuum pump material version is according to exhaust gas.