How to choose the right valve for pump control

1. HOW TO SELECT THE RIGHT VALVE
FOR PUMP CONTROL
Brian Gongol
DJ Gongol & Associates, Inc.
July 18, 2014
Heartland Ops Conference
Kearney, Nebraska

2. Dangerous things to do

3. Get between Donald Trump and a camera

4. Follow too closely on the Interstate

5. Butt dial

6. Try to classify valves comprehensively

7. Lots of ways to try
 Slide
 Rotary
 Globe
 Swing
 Sphere
 Diaphragm
 Sleeve
 Vertical-lift
 Operator/actuation
 Seating
 Action
 Direction of flow
 Degree of rotation
 Allowable leakage
 Number of ports

8. But let's try a different way
 Slide
 Rotary
 Globe
 Swing
 Sphere
 Diaphragm
 Sleeve
 Vertical-lift
 Operator/actuation
 Seating
 Action
 Direction of flow
 Degree of rotation
 Allowable leakage
 Number of ports

9. Primarily: Purpose
What are we trying to make happen?

10. Protection

11. Management

12. Energy control

13. Secondarily: Means
How are we going about doing it?

14. Stopping flow

15. Throttling flow

16. 1: Protecting by stopping (prior to pump)
1

17. Foot valve
Usually attached to a screen

18. Silent check valve

19. Suction-side check valve

20. 1: Protecting by stopping (prior to pump)
 High risk of clogging
 Introduces friction losses
 NPSH considerations (raises TDSL)
 Net energy impact: Priming protection vs. friction losses

21. 2: Protecting by stopping (after pump)
2

22. Three basic types of post-pump check valve

23. Swing check

24. Lift check

25. Ball check

26. Lever-and-weight check

27. Cushioned check

28. Tilting-disc check

29. 2: Protecting by stopping (after pump)
 What's holding it closed?
 Weight of the ball, spring strength, disc weight
 External controls or moving parts?
 Internal surface flow obstruction
 Adjustability
 Seating tightness

30. 3: Protecting by stopping and throttling
3

31. Electric check

32. Throttling check

33. Tilting-disc check with buffers

34. 3: Protecting by stopping and throttling
 Controlling or dampening pump startup
 Controlling or dampening pump shutdown
 Immediacy of closure on power loss

35. 4: Managing by stopping
4

36. Gate valves

37. Gate valves
 Gate valves
 Knife-gate valves
 Resilient-wedge gate valves
 Double-disc gate valves

38. Water-control gates

39. Water-control gates
 Slide gates
 Weir gates
 Sluice gates

40. 5: Managing by stopping and throttling
5

41. Ball

42. Plug

43. Butterfly

44. Rotary pump control

45. Pinch

46. Cone

47. 5: Managing by stopping and throttling
 Solids passage
 Tightness of seal
 Seating type
 Coefficient of friction (Cv) versus clear opening
 Ease of seal/seat replacement

48. 6: Energy control to protect (air)
6

49. Air-release (high-volume)

50. Vacuum-break

51. Air/vacuum

52. Air-release (low-volume)

53. Combination

54. 6: Energy control to protect (air)
 Potential for air accumulation
 Head to overcome on startup
 Weight of water column if held by vacuum
 Sidewall thickness of pipe
 Age of pipe

55. 7: Energy control to protect (flow)
7

56. Surge-relief

57. Surge-anticipator

58. 7: Energy control to protect (flow)
 Abruptness of startup
 Abruptness of shutdown
 Momentum of water column
 Tendency to vaporize
 Pipe friction and tendency to dissipate

59. 8: Energy control to manage
8

60. Pressure-reducing

61. Pressure-sustaining

62. Flow-control

63. Emergency cut-in

64. Altitude

65. 9: Highly specialized
9

66. 9: Highly specialized
 Needle
 Solenoid
 Pilot

67. 10: Backflow prevention
10

68. To recap
 Protection by
stopping
 Protection by
throttling
 Protection by
energy control
 Management by
energy control
 Management by
throttling
 Management by
stopping

69. Questions?
 Thank you for coming!  Brian Gongol
 DJ Gongol & Associates
 515-223-4144
 info@djgongol.com

70. References
 Most valve images are courtesy of GA Industries
 All other images are original work by and copyright reserved
to Brian Gongol