Abstract: A dispenser for a liquid, in particular, a bottle-top dispenser, with a cylinder/piston arrangement with a measuring cylinder (1) and a piston (2) which is capable of being displaced therein in a sealed manner, with a valve arrangement (3) connected to the piston (2), with an inlet valve and an outlet valve (5), each provided with a valve body (6) and a valve seat (7). The dispenser is characterized in that all of the parts or regions of the dispenser touched by the liquid are made entirely of a pure thermoplastic material or are coated with a pure thermoplastic material in such a manner that no contact is made by the liquid with the substrate coated with plastic material or with components of the substrate.

Abstract: The subject-matter of the invention is a dispenser for a liquid, in particular a bottle-top dispenser, with a cylinder/piston arrangement with a measuring cylinder (1) and a piston (2) which is capable of being displaced therein in sealed manner, with a valve arrangement (3) connected to the piston (2), with an inlet valve (4) and an outlet valve (5), each provided with a valve body (6) and a valve seat (7). Said dispenser is characterised in that all the parts or regions of the dispenser touched by the liquid consist entirely of a pure thermoplastic material or are coated with a pure thermoplastic material in such a manner that no contact is made by the liquid with the substrate coated with plastic material or with components of said substrate.

Abstract: A recombination system for catalytic oxidation of hydrogen in storage battery gases includes a gas supply duct which makes it possible for the combustible gas flowing through it to aspirate from the ambient the necessary combustion air, following the principle of a Bunsen burner, and to entrain it to the recombination catalyst. In case of over-supply of gas, an acid separator positioned in the gas supply pipe counteracts the gas aspiration by means of its flow impedance and thereby makes the recombination system safe from overload. It can also be connected following a conventional recombiner, thereby increasing its effectiveness, by receiving the excess hydrogen from same and reacting it with the aid of the air aspiration.