RE: CO2 Flow Fine Tuning via IV type roller valve

[Douglas Guynn <dguynn at nwol_net>]

Bob wrote:

Anyone ever try using an IV-type "roller valve", like used in hospitals, 
for
fine tuning of the flow rate of CO2?

I sometimes use an IV drip set in my setup, but only for liquids. At low 
flow rates like 8 to 10 drops per minute, the tubing tends to close after 
an hour or so. I would guess that with the smaller opening required for gas 
flows, this would present an even greater challenge.