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Instruction Manual

D103597X012

D4 Valve with easy-Drive Actuator

November 2013

D Check with your process or safety engineer for any additional measures that must be taken to protect against process

media.

WARNING

For explosionproof applications, ensure the actuator cover is properly bolted before applying power to the actuator.

Personal injury or property damage may result from fire or explosion if power is applied to the actuator with the cover

removed in a hazardous area.

Do not remove the actuator cover for 10 minutes after power is disconnected if the UPS option is installed.

For explosion-proof applications, install rigid metal conduit and a conduit seal no more than 457 mm (18 inches) from the

actuator. Personal injury or property damage may result from explosion if the seal is not installed.

Select wiring and/or cable glands that are rated for the environment of use (such as hazardous area, ingress protection, and

temperature). Failure to use properly rated wiring and/or cable glands can result in personal injury or property damage

from fire or explosion.

Wiring connections must be in accordance with local, regional, and national codes for any given hazardous area approval.

Failure to follow the local, regional, and national codes could result in personal injury or property damage from fire or

explosion.

Valve P lug and Seat Ring

Disassembly

Key Numbers are referenced in figures 11 and 12.

1. Isolatethecontrolvalvefromthelinepressure,releasepressure from both sides of the valve body (key 1), and drain

the process media from both sides of the valve.

CAUTION

The following steps are intended to prevent damage to the valve plug (key 3) and seat ring (key 2) during the removal of the

bonnet and actuator.

2. For Positioning Actuators

•Command the valve to anywhere between 10% and 20% travel.

•Isolate power and signal.

•Proceed to step 3.

For ON/OFF Actuators

•Command the valve to open or close, and cut the power when the valve is at midstroke.

•Isolate power and signal.

•Proceed to step 3.

3. Break the hammer nut (key 6) loose with a hammer. Continue turning the hammer nut by using a hammer or a

large adjustable wrench, tightened around one ear of the hammer nut. If the bonnet is stuck on the valve, continue

to unscrew the hammer nut. The hammer nut will contact the spring pins (key 7) and will force the bonnet out of

the valve. Carefully lift the actuator, bonnet, and valve plug assembly from the valve body.

WARNING

The spring pins must always be in place during valve operation. They provide a safeguard against injury when the unit is

being disassembled.

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Emerson easy-Drive Installationshandbuch Seite 19