Emerson Fisher D & DA Instrukcja Obsługi Pobierz pdf (Strona 9)

Instruction Manual

D100386X012

DandDAValves

June 2014

nuts. Rotate the handle alternately in each direction with light downward pressure to lap the seats. If you think there is

not enough lubrication (for example, if you hear a squeaking noise or feel vibration), stop the procedure, and apply

more lapping compound before continuing. After lapping, remove the bonnet and valve plug/stem assembly as a unit,

and clean the seating surfaces. Completely assemble as described in the Assembly portion of the Trim Maintenance

procedure.

Testthevalveforshutoff.Repeatthelappingprocedureifleakageisstillexcessive.

Assembly

1. Thoroughly clean the seat ring and bonnet threads in the valve body (key 1). Also clean the valve body seat ring

gasket surfaces.

2. Apply anti-seize lubricant to the threads of the seat ring (key 2), bonnet (key 5), and their mating threads in the

body.

3. Put the seat ring gasket (key 3) into the body.

4. Screw the seat ring into the body. Use a socket wrench to tighten the seat ring to the torque values shown in table

4. Remove all excess lubricant after tightening.

5. Clean the bonnet gasket seating surfaces, and install a new bonnet gasket (key 7).

6. If you had not removed the valve plug/stem assembly and packing from the bonnet, then install the bonnet (key 5)

and valve plug/stem assembly (key 4) as a unit, into the valve body. Keeping the valve plug/stem assembly in an

“up” position, thread the bonnet tightly into the valve body, per torque values in table 4.

7. If you had previously chosen to remove the valve plug/stem assembly and packing from the bonnet, then remove

any protective tape or covering from the valve plug/stem assembly (key 4) and carefully install it into the valve

body. Slide the bonnet (key 5) over the stem and thread it tightly into the valve body. Install new packing and the

metal packing box parts according to the correct arrangement in figure 3. Place a smooth-edged pipe over the valve

stem, and gently tap each soft packing part into the packing box.

8. Slide the packing follower, upper wiper, and packing flange (keys 10, 21, and 12) into position. Lubricate the

packing flange studs (key 13) and the washer surfaces of the packing flange nuts (key 15). Install the packing flange

nuts.

9. For spring-loaded PTFE V-ring packing, tighten the packing flange nuts (key 15) until the packing follower (key 10)

contacts the bonnet. For other packing arrangements, tighten the packing flange nuts (key 15) alternately in small

equal increments. Continue until one of the nuts reaches the minimum recommended torque shown in table 3.

Then tighten the remaining packing flange nut until the packing flange is level and at a 90-degree angle to the valve

stem.

10. Mount the actuator on the bonnet (key 5) and connect the actuator and valve plug stem according to the

procedure in the appropriate actuator instruction manual. Check for leakage around the packing follower (key 10)

when you put the control valve assembly into service. Retighten the packing flange nuts as required.

Parts Ordering

Each body-bonnet assembly is assigned a serial number, which is on the body or nameplate. The serial number also

appears on the actuator nameplate if you bought a valve and actuator assembly. Refer to this serial number when

contacting your Emerson Process Management sales office for technical advice. When ordering replacement parts,

mention the serial number. Also specify key number, part description, material, and part number from the following

lists of Parts Kits and part numbers.

WARNING

Use only genuine Fisher replacement parts. C omponents that are not supplied by Emerson Process Management should

not, under any circumstances, be used in any Fisher valve, because they may void your warranty, might adversely affect the

performance of the valve, and could cause personal injury and property damage.

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