Perrygraf Cast Iron Pipe Research Assoc. Pipe Network and Friction Loss Calculator

---

Country of manufacture: USA,            Date of manufacture: ____
Overall length: 21.3 cm,          Width: 8.0 cm.,           Weight: 25.1 gms.
Materials: cardboard shell with cardboard slide
Cursor: no cursor
Scales: 17, most specailized
Front: Friction Loss Calculator: Pipe Size [ Velocity ] Pipe Size [ MGD ] Pipe Size [ Head Loss ] "C" Value
Back: Pipe Network Calculator: "C" Value [ Piipe Size, "K" Value ] Flow [ "A" Factor, "B" Factor ] Flow [ C ] D
Condition: C2-C3 (Mint to Very Minimal use)
Came with: Instruction booklet/folder

---

 

---