(a) The model number is coded to indicate capacity, maximum operating pressure and termination. Capacity is defined in terms of the maximum flow at which the unit will reduce 1% oxygen in hydrogen to 1 ppm. Terminations are coded FF for female pipe thread, SS for Swagelok compression fittings and VCR for Cajon VCR zero-clearance face seal fittings. The termination code include includes a number which indicates the size of fittings in 1/16's of an inch.
e.g. -4SS indicates 1/4" Swagelok tube fittings, both ends.
-8VCR indicates 1/2" Cajon VCR face seal fittings, both ends.
-12FF indicates 3/4" female pipe fittings, both ends.
(b) SCFH stands for Standard Cubic Feet per Hour
(c) Dimensions are in inches and Length includes fittings.