Very nice Filter-regulator with compact pressure gage plus set range indicators.
This unit is perfectly ready to run in your process equipment
3/8" NPT (FPT), sensitive regulator, and an easy-to-read Ashcroft  0-100PSI gage installed.

AW30-N03-Z part number Breakdown:

AW = Series
30 = Body Size 30
N = NPT
03 = 3/8" Ports
Z - Name plate, caution plate for bowl, and pressure gauge in imperial units: psi, °F

• Integrated filter and regulator units save space and require less piping.
• Ambient and fluid temperature 23 to 140°F (–5 to 60°C) (with no freezing) 
Proof pressure 218 psi (1.5 MPa) 
Maximum operating pressure 145 psi (1.0 MPa) 
Set pressure range 7.3 to 123 psi (0.05 to 0.85 MPa) 
Nominal filtration rating 5 µm Drain capacity (cm3 ) 25ml