CO₂ enquiries: describing the supply conditions
Thirteen CO₂ models sit in ANYI's record with three different bore sizes. Which one fits depends on conditions only you can describe, so here is how to describe them.
ANYI's factory record holds thirteen CO₂ models. They are not thirteen variations on one part. Across them the recorded bore sizes are Φ4mm, Φ6mm and Φ7mm, and the recorded working pressures include 15MPa, 20MPa and 2175Psi. Those differences exist because CO₂ is drawn in different ways for different duties, and a valve that is right for one is not automatically right for another.
None of that can be resolved from a model list. It is resolved from a description of your supply conditions. This article is about writing that description well enough that a technical reply is possible.
What to describe
- Which phase you are drawingVapour withdrawal and liquid withdrawal are different duties. Say which one your installation uses, and whether the cylinder is fitted with a dip tube.
- The flow you need, and whenA continuous low draw and a short high draw place different demands on the passage through the valve. Give a figure and a duty pattern rather than "normal".
- The cylinderGive the cylinder's neck thread designation and, if you have it, its working pressure and test date convention. The valve has to fit the cylinder you own.
- The outlet you needName the outlet designation your downstream equipment expects. If your equipment came with an adaptor already fitted, say so - it changes the answer.
- Temperature and locationIndoor, outdoor, cold store, vehicle-mounted. Ambient conditions belong in the brief even when they seem obvious to you.
Why bore is not a detail
Bore deserves a paragraph of its own, because it is the specification most often skipped and most often decisive. The bore is the size of the passage through the valve. It is not the size of the connection, and the two are recorded separately for good reason: two valves with an identical outlet designation can have different bores, and will behave differently at the same demand.
In ANYI's CO₂ rows the recorded bores span Φ4mm to Φ7mm. If your enquiry says nothing about flow, nobody can tell you which of those you want, and a supplier who picks one for you anyway has guessed.
Common questions
Can I just order the same valve my last cylinder had?
You can, if you can read its exact model designation and confirm it against the record. "The same as before" without a designation is not enough to reorder from.
Does a higher working pressure rating make a valve more suitable?
No. A rating is a limit, not a measure of quality or of fit. A valve rated well above your service pressure can still be the wrong bore or the wrong connection.
My application is food or beverage. Does that change the enquiry?
It adds requirements rather than replacing any. State them explicitly, including any documentation your process requires, and we will tell you what is on file.
Phase, flow, cylinder thread, outlet and location are enough for a first technical reply. Exact figures are better than ranges.