On the one hand, the dosing or metering of a non-lubricating liquid can be accomplished by using different precisely engineered material of construction as follows: The pump body and gear shafts are made of stainless steel, Hastelloy or titanium; the sleeve bearing of carbon or plastic materials such as PEEF or Teflon; the gear teeth are made from a nickel alloy, PEEK or PTFE (Teflon) and can be optionally combined with each other. The gears and sleeve bearing materials all have superb tribological properties
