Emerson easy-Drive Installationshandbuch PDF herunterladen (Seite 20)

Instruction Manual

D103597X012

D4 Valve with easy-Drive Actuator

November 2013

4. Use a socket wrench to loosen the seat ring (key 3).

5. Remove the seat ring (key 3) and seat ring gasket (key 9) from the valve body.

6. To replace the plug, the stem nut (key 42) must be removed to expose the groove pin (key 4). Open the

explosionproof enclosure (key 60), using a 13mm wrench.

7. Remove the stem nut (key 42) using a 11/16 inch wrench; insert a punch in the hole in the stem to restrict rotation

of the stem while removing the stem nut. The travel indicator (key 32) may need to be moved to expose the hole.

8. Push the stem downward just far enough to expose the groove pin (key 4) on the plug.

9. Remove the plug by driving out the groove pin and unscrewing the valve plug from the stem.

WARNING

Becarefultoavoiddamagingtheseatingsurfaceonthevalveplugorseatringasdamageintheseareaswillallow

excessive leakage at shutoff. Avoid damaging the highly polished valve stem surface. A damaged valve stem could cut the

packing and allow process fluid to leak to the atmosphere.

Table 7. Torque for Seat Ring (Key 3)

VALVE SIZE RECOMMENDED TORQUE

NPS NSm LbfSft

1 407 300

2 698 515

Assembly

1. Make sure the bonnet O-ring (key 8) is on the bonnet and lubricated with lithium grease (key 49).

2. Install the plug (key 2) on the stem (key 47) and insert a new groove pin (key 4).

3. Pushtheplugandstemupwardtoensurethethreadsonthetopofthestemareexposed.Threadthestemnut(key

42) onto the top of the stem and tighten the stem nut (key 42) to 39 N•m (29lbf•ft). Insert a punch in the hole in

the stem to restrict rotation while tightening the stem nut.

4. Replace the top of the explosion proof enclosure (key 60) and tighten cap screws (key 64) to 20 N•m (15 lbf•ft).

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

gasket surfaces.

6. Apply anti-seize lubricant (key 54) to the threads of the seat ring (key 3), and its mating threads in the valve body.

7. Apply anti-seize lubricant (key 54) to the seat ring gasket (key 9) and install into the valve body.

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

table7.Removeallexcesslubricant after tightening.

9. Lubricate (key 54) the threads on the valve body and hammer nut and the contact surfaces of the bonnet and

hammer nut flange. Install the bonnet and actuator assembly with pinned valve plug onto the valve body. Tighten

the hammer nut using an adjustable wrench until the nut stops turning. A few hammer blows will be required to

ensure that the assembly is tight.

Valve Packing

WARNING

Observe the warning at the start of the Maintenance section.

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 37 38

Keine Kommentare

Emerson easy-Drive Installationshandbuch Seite 20