Packing Liquid Silox · Data Sheet

Table of Contents

General

Silox is a synthetic oil belonging to the group of polydimethyl siloxane. It is colourless and clear with a weak odour.

Application

Silox can be used in all RITTER Drum-type Gas Meters. As opposed to water as a Packing Fluid, Silox can be used under 0 °C. It also has a lower evaporation rate in combination with a viscosity similar to water. Because of this, the Packing Liquid level remains stable over a longer period of time. This leads to an improvement in the repeatability of measurement results, and in a reduction in the required frequency of Packing Liquid level monitoring.

The use of Silox is further recommended when the gas should remain dry or when the gas reacts with water.

Not suitable for wet chlorine gas and alkanes (methane, ethane, butane, pentanes).

Advantages

Use under 0 °C (down to -40 °C)
less evaporation than water due to its lower vapour pressure, resulting in greater stability of the Packing Fluid level and in more consistent measurement result
the gas remains dry
in general, a lower chemical reactivity than water

Properties

Chemical designation		cyclic polydimethyl siloxane
Viscosity	20 °C	4 cSt (=mm2/sec)
	25 °C	4 cSt
Density	15 °C	0.96 g/ml
	25 °C	0.95 g/ml
	50 °C	0.93 g/ml
Vapour pressure	20 °C	0.16 mbar
	50 °C	38 mbar
Boiling Point	205 °C
Pour point	-40 °C
Flash point	70 °C
Ignition point	450 °C
Appearance		Clear, odourless, colourless fluid

Material Safety Data Sheets

Silox (MSDS)

V 1.0 / Rev. 2023-03-24 / Subject to alterations.

Download this data-sheet as PDF file

The most recent version of this data-sheet can be found at …
https://dlr.ritter.de/en/packing-liquid-silox/

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