Emerson Daniel 700 Series User Manual page 50

Planned maintenance
November 2020
The control valve must be cleaned completely inside the housing components and stored/
shipped as it was received. Refer to Storage Preparations for cleaning instructions.
After the meter is shut down, refer to
disassembly procedure.
After the previous steps have taken place, assemble the control valve per the instructions
in Mechanical
9.3.1 Cylinder disassembly (NPS 2-12)
Procedure
1. Remove the compression fitting and tubing from the port Y connection on the
2. Remove the nuts that secure the cylinder head to the valve body.
3. Alternately tighten the jack-out screws until the cylinder assembly is free to be lifted
4. Lift the cylinder assembly by the cylinder head. Remove it from the valve body and
5. Before removing the screws, place the cylinder assembly in an arbor press to
6. Use an Allen wrench to remove the screws that secure the cylinder head to the
7. Remove the valve spring, indicator stem, retaining ring, washer, and piston from
8. With the cylinder in a vertical position (ports located on the top part of the
50
assembly.
cylinder head.
out of the valve body.
set it in a vertical position with the cylinder head on top.
immobilize the cylinder head. This is to prevent sudden spring pressure from being
released and causing injury or damage.
CAUTION
SPRING PRESSURE HAZARD
Follow the instructions in
Failure to comply may cause release of spring pressure, resulting in serious injury
or equipment damage.
cylinder, and then gradually release the arbor press to remove the cylinder head
from the cylinder. Remove the indicator guard and the upper bearing first, if your
valve has a position indicator.
the cylinder. Remove only the valve spring and the piston if your valve does not
have a position indicator.
cylinder), place the piston, nose end up, into the recess between the cylinder and
the seat ring. Use an arbor press to push the piston into the cylinder, thus freeing
the seat ring from the cylinder.
Cylinder disassembly (NPS 2-12)
Step 5.
User manual
P/N 3-9008-553
for the detailed
Daniel Series 700 Control Valve