Mear Steam Flow Calculator for Flow at Pressure or Vacuum

Country of manufacture: England,            Date of manufacture: ____
Diameter: 19.5 cm,      Weight: 185.6 gms
Materials: all plastic
Scales: numerous, specialty
Front
     Outer Disk: Pressure Loss, Flow rate
     Inner Disk: Bore of Pipe, Sepcific Volume, Average Line Pressure, Saturation Temperature, Instructions
     Cursor: Equivalent length of Pipe, Instructions
Back
     Outer Disk: Type of valve or fitting, Flow, Pressure bar absolute, Velocity, Equivalent lengths of fittings and valves, Sonic Velocity
     Inner Disk: Specific Volume, Bore of Pipe, Pipe Bore, Superheat °C, Sonic Velocity indicator, instructions
Condition: C0 (Mint w/all accessories)
Came with: Red plastic slipcase w/snap closure, manual