PROCEED HPA 3 Manual de Instruções descarregar pdf (Página 15)

Instruction Manual

D101634X012

HP and HPA Valves

October 2014

Key numbers referenced in this procedure are showninfigure16,17,or18,except where indicated.

1. Remove the actuator and bonnet by following steps 1 through 6 of the replacing packing procedure. Observe all

warnings and cautions.

2. Lift the valve stem and attached valve plug out of the valve body. If the valve plug is to be reused, tape or otherwise

protectthevalveplugstemandthevalveplug seating surface to prevent scratches.

3. Lift out the cage (key 2) and the bonnet gasket (key 11). For an NPS 2 valve body with a Cavitrol III two stage cage,

also remove the bonnet spacer and two gaskets.

Constructions other than TSO trim

1. Remove the seat ring (key 4) and the seat ring gasket (key 12).

2. Refer to the Valve Plug Maintenance procedure or to t he Lapping Seats procedure.

TSO Trim

TSO trim: 0.8125 Inch Port Diameter (figure 7)

1. Remove the pin that locks the inner plug to the stem.

2. Using a strap wrench or similar tool, unscrew the outer plug from the inner plug. Do not damage the outer plug

guide surfaces.

3. Remove the protected soft seat seal.

4. Inspect the parts for damage and replace if needed.

5. Refer to the Valve Plug Maintenance procedure or to t he Lapping Seats procedure.

TSO trim: 1.6875 Inch Port Diameter (figure 8)

1. Remove the retainer, backup ring, anti-extrusion rings, and piston ring.

2. Remove the set screws that lock the outer plug to the stem.

3. Using a strap wrench or similar tool, unscrew the outer plug from the inner plug. Do not damage the outer plug

guide surfaces.

4. Remove the protected soft seat seal.

5. Inspect the parts for damage and replace if needed.

6. Refer to the Valve Plug Maintenance procedure or to t he Lapping Seats procedure.

TSO trim: 2.6875 Inch and Larger Port Diameters (figure 9)

1. Remove the retainer, backup ring, anti-extrusion rings, and piston ring.

2. Remove the set screws that lock the outer plug to the inner plug.

3. Using a strap wrench or similar tool, unscrew the outer plug from the inner plug. Do not damage the outer plug

guide surfaces.

4. Remove the protected soft seat seal.

5. Inspect the parts for damage and replace if needed.

6. Refer to the Valve Plug Maintenance procedure or to t he Lapping Seats procedure.

Valve Plug Maintenance

Key numbers used in this procedure are shown in figure 16, 17, or 18, except where indicated.

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 55 56

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