WORKBOOKPIPES, FITTINGS AND VALVES HANDS ON

STEP 3:

Obtain the box of valves and fittings and find some space where you can spread them out in the lab. The pieces are numbered. On the sheet below, write the type and description of each fitting. Include the material of construction, type of joint and size.

FITTINGS

  1. 2” cast iron Y-branch fitting (hub and spigot joints)______
  2. ……………………………………………………………………………………………
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  35. ……………………………………………………………………………………………

VALVES

  1. ……………………………………………………………………………………………
  2. ……………………………………………………………………………………………
  3. ……………………………………………………………………………………………
  4. ……………………………………………………………………………………………
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  9. ……………………………………………………………………………………………
  10. ……………………………………………………………………………………………

ANSWERS TO FITTINGS EXERCISE (STEP 3)

  1. 2” cast iron Y-branch fitting (antiquated hub and spigot joints)
  2. 2” cast iron 90° elbow (antiquated hub & spigot joints)
  3. threaded flat faced steel flange for 2” pipe and graphite impregnated gasket
  4. same as 3
  5. same as 3
  6. 1 ½ “ PVC pipe and 90° solvent welded (socket) elbow, blue
  7. 1 ½” PVC 45° socket welded elbow, blue
  8. 1 ½ “ ABS drain pipe and socket tee (solvent welded), black
  9. 1” steel 90° butt weld elbow
  10. 1”  ½” threaded steel reducing bushing
  11. 1”  ½” steel butt weld reducing coupling, black
  12. 1” steel butt weld tee, black
  13. 1” steel butt weld cap, black
  14. 1” steel threaded close nipple
  15. 1” steel butt weld 45° elbow, black
  16. 1”  6” steel threaded nipple
  17. 1” steel threaded coupling
  18. 1” male  ½’ female steel threaded reducing bushing
  19. ¾” CPVC 90° socket elbow (solvent welded), white
  20. 1” steel threaded pipe cap
  21. 1” steel threaded pipe plug (square head)
  22. 1”  ½” steel threaded reducing coupling
  23. 1” steel threaded tee
  24. 1”  1”  ½” steel threaded tee
  25. 1”  1”  ¼” steel threaded tee
  26. 1” steel threaded cap
  27. 1” steel 45° threaded elbow
  28. 1” steel threaded 90° street elbow
  29. 1” steel 90° threaded street elbow
  30. 1” steel threaded return bend
  31. ½” hard copper pipe w. soldered tee & 90° elbow fittings
  32. 3/8” soft copper tubing (chrome plated) w. compression nut and collar
  33. 1” steel threaded union

VALVES

  1. check valve
  2. globe valve
  3. gate valve
  4. ball valve
  5. needle valve
  6. plugcock valve (stop cock)
  7. stem of globe valve including rubber disc and packing

WORKBOOKPIPES, FITTINGS AND VALVESPOWEPOINT LESSON

STEP 4:

Obtain a copy of the Power Point presentation entitled ‘Valves’. Watch the presentation and answer the following questions.

GATE VALVES

  1. State the type of service …………………………………………………………………………
  2. The pressure drop is ………………………… because ………………………………………
  3. The relative weight is ……………………………………………………………………………
  4. Their space requirement for installation is …………………………………………………….
  5. Give a reason for not using this valve for throttling service …………………………………
    ……………………………………………………………………………………………………..

PLUG OR BALL VALVES

  1. State the type of service …………………………………………………………………………
  2. The pressure drop is ………………………… because ………………………………………
  3. The relative weight is ……………………………………………………………………………
  4. Their space requirement for installation is …………………………………………………….
  5. State one feature that is possible with plug valves, but not with other types of valves.
    ……………………………………………………………………………………………………..

GLOBE VALVES

  1. State the type of service …………………………………………………………………………
  2. The pressure drop is ………………………… because ………………………………………
  3. The relative weight is ……………………………………………………………………………
  4. Their space requirement for installation is …………………………………………………….
  5. State special requirement of a globe valve.
    ……………………………………………………………………………………………………..

BUTTERFLY VALVES

  1. State the type of service …………………………………………………………………………
  2. The pressure drop is ………………………… because ………………………………………
  3. The speed of response is ……………………………………………………………………………
  4. State the type of fluids which butterfly valves are suitable for handling.
    ……………………………………………………………………………………………………..

DIAPHRAGM VALVES

  1. State the type of service …………………………………………………………………………
  2. State the type of fluids which butterfly valves are suitable for handling.
    ……………………………………………………………………………………………………..

CHECK VALVES

  1. State the sole purpose of a check valve. ……………………………………………………
  2. State the special requirement for a check valve.
    ……………………………………………………………………………………………………..

Pipes, Fittings, Valves and Pumps Self Study UnitPage 1 of 53