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USER MANUAL
• Drip pan
• (3) hoist rings 1-in to 8-in nnc 10,000 lb, part number 1-504-90-094
Procedure
1. Completely block all product flow to the valve and drain the process line.
2. Disconnect "Y" port on top of cylinder head and relieve pressure in the valve.
Warning
SPRING FORCE HAZARD
Use extreme caution when removing the cylinder head from the valve body.
Failure to disassemble or reassemble the valve without carefully being aware of the
force of the spring against the cylinder head may result in death, serious injury or
damage to the equipment.
WARNING
SPRING TENSION HAZARD
Do not remove jack screws (long bolts). Jack screws are spring tension retaining
devices and must NOT be tampered with. Follow disassembly procedure above.
Failure to comply with instructions may result in serious personal injury or
damage to the equipment.
Figure 9-2: Model 700 Control Valve jack screws and spring
3. Product remains in the valve below the cylinder head in the piston. Place a drip pan
below the valve before starting step 4 (removal of the cylinder head).
4. Remove nuts; except the jack screws (long bolts).
5. Alternatively, loosen the remaining two nuts from threaded rods allowing the
cylinder head to slowly raise from the valve body and relieve spring tension. Oil
from the piston will flow into drip pan. It is important to avoid damaging or bending
the threaded rods during this operation.
6. Once spring tension is fully relieved, remove remaining nuts from threaded rods
and lift cylinder head and reservoir away from threaded rods.
7. Remove spring from valve.
8. Use a hand pump to remove the remaining oil from the cylinder/piston assembly.
9. Insert (2) ¾-in - 10 N.C. bolts with large washers behind bolt heads into threaded
holes in the cylinder.
Planned maintenance User manual
November 2020 P/N 3-9008-553
52 Daniel Series 700 Control Valve
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