1. Air Operated Valve Calibration NMV21

2. Terminal Objective
Given the necessary references, tools and test equipment, the technician will maintain pneumatic control valve components. Mastery will be demonstrated by completion of all Laboratory Practical Evaluations and scoring at least 80 % on an end of course exam.

3. Enabling Objectives
Given an example or illustration, identify the types of control valves.
Given an example or illustration, identify components associated with various valve types.
Identify flow characteristics of various valves .
Describe the operation of Pneumatic Actuators.
Describe the critical elements associated with valve packing.
Describe the operation of a flapper/nozzle detector.
Describe the operation of a booster relay.

4. Enabling Objectives
Describe the operation of air regulators.
Describe the operation of valve position indication devices.
Describe the use and operation of solenoid valves on air operated valves.
Calibrate a Fisher 546 I/P Converter.
Benchset diaphragm actuators.
Calibrate Valve Positioners.
Calibrate a Steam Bypass Control Valve.

5. FLOW
Typical Globe Valves

6. Typical Gate Valves

7. FLOW
Typical Butterfly Valves

8. SPRING
FLOW
FLOW
Typical Check Valves

9. Typical Diaphragm Valve

10. Typical Ball Valve

11. Typical Plug Valves

12. Two Way
Packing Flange
Three Way
Packing
Cage
Bonnet
Valve Stem
Valve Plug
Seat
Valve Body
Typical Globe Valve Construction

13. Various plugs shown in yellow
Basic Plug Disc
Composition Disc
Guided Disc
Some Globe Valve Plugs (discs)

14. Reverse Action (down to open) Double-Ported Globe Valve
FLOW
FLOW
Reverse Action (down to open)
Double-Ported Globe Valve
Globe Valve Ports and Action

15. Packing Flange
Valve Stem
Packing
Bonnet
Valve Seat
Split Disc Solid Disc
Typical Gate Valve Construction
Valve Body

16. Packing Flange
Packing
Valve Stem
Valve Body
Valve Disc
Valve Seat
Bearings
Typical Butterfly Valve Construction

17. Valve Body
Valve Seat
Ball
Valve Stem
Bearings
Bonnet
Packing
Packing Flange
Typical Ball Valve Construction

18. 100 75
Linear
% Flow 50
Quick Opening
Equal Percentage 25
Ideal Flow Characteristics 25 50 75
100
% Valve Travel

19. Linear
Equal Percentage
Quick Opening
Plug and Seat Flow Characterization

20. Trim Cage Flow Characterization

21. Drag Valve Trim

22. Diaphragm Casings
Diaphragm
Diaphragm Plate
Seal Bushing
Actuator Spring
Actuator Stem
Spring Seat
Spring Adjustor
Stem Connector
Travel Indicator Disk
Indicator Scale
Yoke
Diaphragm Actuator Construction

23. O-Ring
Positioner
Piston Rod Extension
Upper Seal Bushing
Cylinder
Piston / Rod
Lower Seal Bushing
Piston Rod Boot
Yoke

25. Packing Gland Follower
Valve Stem
Braided Ring
Graphite Rings
Braided Ring
Carbon Spacer

27. Fisher 3582 Positioner Principle of Operation

28. Fisher 3582 Positioner Construction
Travel Adjustment Screw
Pivot Pin
Input Cam
Beam
Nozzle
Follower Assembly
Rotary Shaft Arm
Flapper
Input Bellows
Fisher 3582 Positioner Construction
Nozzle

29. Fisher 3582 Wear Points Roller Wear and Cut Guide & Roller Bearing
Guide Wear
Roller Wear and Cut
Guide & Roller Bearing
Beam
Wear caused by Guide (“locked valve position”)
Cam
Beam Off Center
Wear caused by siezed roller
Cam
Fisher 3582 Wear Points

30. Fisher 3570 Positioner Principle of Operation

31. Input Bellows
Range Spring
Beam
Horizontal Relay
Cylinder (Top)
Bias Spring
Air Supply
Bellows Post
3570 Positioner Construction
Cylinder (bottom)
Vertical Relay
Input

34. Operating Lever
Cover / Gasket
Clamping Screw
Lever Locking Pipe Plug
Contacts
NAMCO Position Switches

35. Simplified LVDT

36. S S S S S S De-Energized Energized 2-Way 3-Way 4-Way
P&ID symbols for SOV’s

37. Cover
Core Assembly
Yoke
Body
Coil
Disc Assembly
End Cap
Housing
Solenoid Base
Typical SOV Construction

38. Fisher 546 I/P

39. Shunt Pivot (behind Torque Motor)
Zero
Air Supply
Output
Torque Motor Assembly
Span
Shunt Pivot (behind Torque Motor)
Input
Fisher 546 I/P Construction