
DeZURIK
3---36" PEF 100% Port Eccentric Plug Valves
April 2015
Page 15
D10453
Disassembly
See Figure 3 for parts identification.
This valve is a pressure vessel. The bonnet will blow off the valve if the bonnet
bolts are removed with pressure in the valve and pipeline media can be
hazardous. Completely release pressure before disassembling the valve.
Follow these steps to disassemble valve:
1.
Relieve pipeline pressure and close the valve.
Moving parts from accidental operation of power actuator can cause personal
injury or equipment damage.
Disconnect and lock out power to actuator before servicing.
2. If the actuator is powered, disconnect and lock out the pneumatic, hydraulic, or electrical power
to prevent accidental operation of the actuator.
3. Close the valve.
4. Remove the valve from the pipeline (if desired).
Note:
The valve can be disassembled while still in the pipeline. To remove valve from pipeline, see
“Removing Valve from Pipeline”
section.
When an eccentric valve is mounted in a vertical pipeline—or mounted in a
horizontal pipeline with the plug stem horizontal—gravity can cause the plug
to swing to a lower position in the valve body when the actuator is removed.
Place the plug in the lowest position before removing the actuator.
5. Remove actuator from valve—see Actuator Instructions.
6. Scribe a line on the body (A1), bonnet (A6) and plug stem (A3) to help align these parts during
reassembly.
7. Remove the screws (A8) that hold the bonnet (A6) in place, then pry the bonnet loose from the
body (A1).
Note:
Note the location of WARNING TAG (A14) on bonnet (A6) and do not misplace tag. This tag must
be attached to the valve at reassembly.
8. Remove the plug (A3) from the body (A1).
9. Remove the gland nuts (A13) and gland (A11) from the bonnet (A6).
10. Remove the packing (A9) from the bonnet (A6).