| 摘要 |
<p>The Teflon-S is a plastics material of a group consisting of polyethylene and its halogen substituted derivs. providing a fluorocarbon -rich surface characterised by high antifriction properties and resistance to corrosives and solvents. The valve may comprise a rotary plug, ball valve, or inlet post and seat. The vulnerable valve parts are sprayed, dipped, brushed, or coated with Teflon-s which has anti-stick, self-lubricating, long-wearing, and self-renewing properties.</p> |
