Kleppen uitwisselen (cilinderkop)

[TheSaint77]

FF off topic
Sodium(Engels) is Natrium, Scheikundig naamgeving.Na.
natrium is een zeer onedel metaal wat in zuivere vorm bijzonder heftig(explosief) reageert met water.
Vandaar ook dat er in Bentley vermeldt staat dat Natriumgevulde kleppen niet zomaar weggegooid mogen worden.
Deze moet je eerst onschadelijk maken in water.

Klopt! Ik heb t even nagezocht en vond dit:

Sodium (IPA: /ˈsəʊdiəm/) is a chemical element which has the symbol Na (Latin: natrium), atomic number 11, atomic mass 22.9898 g/mol, oxidation number +1. Sodium is a soft, silvery white, highly reactive element and is a member of the alkali metals within "group 1" (formerly known as ‘group IA’). It has only one stable isotope, 23Na. Sodium was first isolated by Sir Humphry Davy in 1807 by passing an electric current through molten sodium hydroxide. Sodium quickly oxidizes in air so it must be stored in an inert environment such as kerosene. Sodium is present in great quantities in the earth's oceans as sodium chloride. It is also a component of many minerals, and it is an essential element for animal life. As such, it is classified as a “dietary inorganic macro-mineral.”

Applications
Sodium in its metallic form can be used to refine some reactive metals, such as zirconium and potassium, from their compounds. This alkali metal as the Na+ ion is vital to animal life. Other uses:

• In certain alloys to improve their structure.
  In soap, in combination with fatty acids. Sodium soaps are harder (higher melting) soaps than potassium soaps.
  To descale metal (make its surface smooth).
  To purify molten metals.
  In sodium vapor lamps, an efficient means of producing light from electricity (see the picture), often used for street lighting in cities. Low-pressure sodium lamps give a distinctive yellow-orange light which consists primarily of the twin sodium D lines. High-pressure sodium lamps give a more natural peach-colored light, composed of wavelengths spread much more widely across the spectrum.
  As a heat transfer fluid in some types of nuclear reactors and inside the hollow valves of high-performance internal combustion engines.
  NaCl, a compound of sodium ions and chloride ions, is an important heat transfer material.
  In organic synthesis, sodium is used as a reducing agent, for example in the Birch reduction.
  In chemistry, sodium is often used either alone or with potassium in an alloy, NaK as a desiccant for drying solvents. Used with benzophenone, it forms an intense blue coloration when the solvent is dry and oxygen-free.