I am looking for a list of manufacturers producing small (~200 scfh CO2) multi-stage compressors to boost CO2 pressure from near atmospheric to 1000 psi. Any suggestions appreciated.
Most high pressure needle valves have arrows printed on the sides for flow direction. Presumably this is a simplified way of keeping the stem packing side toward the lower pressure.
In the case of double ended sample cylinders, what would be the correct orientation?
