Fittings for CO2

Throughout the world, carbon dioxide cylinder valves have a special thread. In Europe, Africa and much of Australasia, the thread conforms to British Standard BS 341 Part 1 No. 8 (0.860 in x 14 TPI) or the direct European equivalent (DIN 477 No. 6).
These threads are in effect interchangeable.
American CGA 320 and Japanese JIS B 8246 CO2 threads are different and are not compatible with each other nor with BS or DIN CO2 threads.
The following fittings have threads to BS 341 Part 1 No.8. The material is brass.
Maximum working pressure 240 bar.

Washers

Using thick walled copper tube 3/8 in o.d., Part number 2222.2401, is a convenient way of running small flows of liquid carbon dioxide or CO₂ gas between equipment items.
Compression fittings are a reliable and simple method of joining together sections of 3/8 in o.d. tube and connecting the tube to other threaded items. 

For complete safety, all CO₂ pipework and fittings should be of impact-tested low temperature steel in accordance with PED requirements. The fittings are manufactured from low temperature materials which fully conform to UK and European code requirements (unless otherwise stated).

In order to facilitate connections between various items of equipment for use with CO2 liquid and vapour, a number of special fittings are stocked. The material of construction is plated carbon steel unless otherwise stated.

All the pipe and tube is able to withstand the high pressures of carbon dioxide gas and the low temperature of liquid CO2. The steel pipe is made from low temperature material which conforms to UK and European code requirements.

Flanges, Gaskets & Fasteners

A range of low temperature steel fittings are available for socket weld connection. All measurements refer to the nominal bore of the connecting steel pipe. The fittings conform to European Pressure Equipment code requirements.

Strainers are designed to trap any swarf or grit present in a pipeline and to prevent the particles from entering and damaging pipework equipment, such as reducing valves or pressure controllers.

All the strainers below have internal stainless steel screens of 100 mesh which can be withdrawn for cleaning without disconnecting the pipework. All the strainer bodies are of forged or cast steel.

Where in-line filtration is needed in small bore pipework, the sintered filter unit can be fitted between cylinder and equipment. This will trap small particles, without causing a major pressure drop. The sintered filter is held in place by a star clip but it can be removed for cleaning in a solvent. The unit is suitable for both liquid and gaseous carbon dioxide.