DeZurik PEC User manual

DeZURIK 1/2- -- 3" PEC
ECCENTRIC VALVES
Instruction D10095
April 2015

DeZURIK
1/2- -- 3" PEC Eccentric Valves
D10095 © 2015 DeZURIK, Inc.
Instructions
These instructions provide information about PEC Eccentric Valves. They are for use by personnel who
are responsible for installation, operation and maintenance of PEC Eccentric Valves.
Safety Messages
All safety messages in the instructions are flagged with an exclamation symbol and the word Caution,
Warning or Danger. These messages indicate procedures that must be followed exactly to avoid
equipment damage, personal injury or death. Safety label(s) on the product indicate hazards that can
cause equipment damage, personal injury or death. If a safety label becomes difficult to see or read, or
if a label has been removed, please contact DeZURIK for replacement label(s).
Personnel involved in the installation or maintenance of valves should be constantly
alert to potential emission of pipeline material and take appropriate safety precautions.
Always wear suitable protection when dealing with hazardous pipeline materials. Handle
valves, which have been removed from service with suitable protection for any potential
pipeline material in the valve.
Inspection
Your PEC Eccentric Valve has been packaged to provide protection during shipment, however, it can
be damaged in transport. Carefully inspect the unit for damage upon arrival and file a claim with the
carrier if damage is apparent.
Parts
Recommended spare parts are listed on the assembly drawing. These parts should be stocked to
minimize downtime.
Order parts from your local DeZURIK sales representative, or directly from DeZURIK. When ordering
parts, please include the 7-digit part number and 4-digit revision number (example: 9999999R000)
located on the data plate attached to the valve assembly. Also include the part name, the assembly
drawing number, the balloon number and the quantity stated on the assembly drawing.
DeZURIK Service
DeZURIK service personnel are available to install, maintain and repair all DeZURIK products.
DeZURIK also offers customized training programs and consultation services.
For more information, contact your local DeZURIK sales representative or visit our website at
www.dezurik.com.

DeZURIK
1/2–3" PEC Eccentric Valves
April 2015 Page 3 D10095
Table of Contents
Description - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4
Handling - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4
Required Tools - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4
Installation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4
Lubrication - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6
Fusion/Powder Coated Valves - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6
Stem Seal Adjustment
Lever Actuator - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7
Powered Actuator (Powerrac, G-Unit or Compact) - - - - - - - - - - - - - - - - - - - - - - - - 7
Closed Position - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7
Disassembly - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8
Reassembly - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9
Removing Valve from Pipeline - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 10
Field Test - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 10
Emergency Operation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 10
Predicted Wear of Parts - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 10
Troubleshooting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 11

DeZURIK
1/2- -- 3" PEC Eccentric Valves
D10095 Page 4April 2015
Description
The 1/2 - 3” PEC Eccentric Valve is a quarter turn valve. Clockwise rotation of the valve stem 90
degrees closes the valve.
If an actuator other than DeZURIK is to be mounted on the valve, the actuator must be capable of
maintaining the valve plug position with flow in the pipeline.
This valve is a pressure vessel. Pressure must be completely released before disassembly.
The bonnet will blow off if the bonnet bolts are removed with pressure in the valve.
Handling
Lifting the valve improperly may damage it. Do not fasten lifting devices to the actuator, plug or through
the seat opening in the body. Lift the valve with slings, chains or cables fastened around the valve
body, or fastened to bolts or rods through bolt holes in the flanges.
Required Tools
This valve is assembled using only SAE fasteners. To service this valve, you should have a full set of
combination wrenches, Allen wrenches, a large flat tipped screwdriver, a flat pry bar, a pin punch and a
dead blow hammer.
Note: You may want to machine a shaft to aid you in removing the lower bearing from the body. See
"Disassembly" section.
Installation
The type of materials carried in the pipeline and the location of the valve determine the correct
installation procedure.
Liquids and Gases
1. Before installation, remove foreign material such as weld spatter, oil, grease, and dirt from the
valve and pipeline.
2. Install the valve as shown in Figure 1.
Figure 1 — Liquids and Gases
3. Ensure the valve and flanges are concentric to ensure proper flange sealing.
4. Tighten the flange bolts or studs in a crisscross pattern.

DeZURIK
1/2–3" PEC Eccentric Valves
April 2015 Page 5 D10095
Installation (continued)
Suspended Solids
If the pipeline carries suspended solids such as paper stock of 2 percent or higher consistency, mining
slurry, or raw sewage:
1. Before installation, remove foreign material such as weld spatter, oil, grease, and dirt from the
valve and pipeline.
2. Install the valve as shown in Figure 2.
a. In HORIZONTAL pipelines, install the valve so that the plug is horizontal and rotates
upward as the valve opens.
b. For VERTICAL pipelines, install the valve with the end marked “SEAT” at top of valve.
Figure 2 — Liquids with Suspended Solids
3. Tighten the flange bolts or studs in a crisscross pattern.
4. Ensure the valve and flanges are concentric to ensure proper flange sealing.
NOTE: In the case of limited space where both the
recommended seat orientation shown and the
recommended plug orientation described in 2a above, are
not possible, the recommended plug position shall
always take precedence.
For Pump Isolation Service, install the discharge valve
with the seat toward the pump and with the plug rotating to
the top of the pipeline in the open position. On the suction
side, install the valve with the seat toward the pump.

DeZURIK
1/2- -- 3" PEC Eccentric Valves
D10095 Page 6April 2015
Lubrication
These valves have been lubricated at the factory and require no routine maintenance lubrication. If the
valve is disassembled lubricate the plug journals and felt washer as follows:
OXYGEN SERVICE VALVES -- Lubricate the specified valve components with Hooker Fluorolube GR-
362 (no substitutes are allowed) unless valve has an aluminum actuator. Valves with aluminum
actuators must be lubricated with DuPont Krytox 240-AC (no substitutes are allowed). To determine if
your valve has an aluminum actuator, see the Actuator Instructions.
APPLICATIONS OTHER THAN OXYGEN SERVICE -- Use a flow media compatible grease. The
valves have been lubricated at the factory as follows;
•Valves with CAST IRON, DUCTILE IRON, NI-RESIST and BRONZE plugs: Have been
lubricated with a medium aluminum complex based lubricant using one of these lubricants.
- Lubriplate Clearplex-2 (recommended)
- Amoco FG (alternate)
- Mobilgrease FM 101 (alternate)
- Petro-Canada Purity FG 2 (alternate)
- Phillips Philube PF (alternate)
•Valves with all other plug materials: Have been lubricated with a nickel based compound using
one of these lubricants.
- Bostik Never-Seez (recommended)
- Keystyone No-Weld #1 (alternate)
Fusion/Powder Coated Valves
Valves with fusion/powder coated exterior paint require flat washers to be installed
under the flange nuts when installing the valve to the pipeline flange to prevent the
paint from cracking or chipping.

DeZURIK
1/2–3" PEC Eccentric Valves
April 2015 Page 7 D10095
Stem Seal Adjustment
Lever Actuator
Tighten the lock nut on the plug stud to compress the spring slightly. The spring tension lifts the plug
so the shoulder of the plug compresses the stem seal.
Powered Actuator (Powerrac, G-Unit or Compact)
Tighten the nut or screw to 5 ft-lbs.
Closed Position
The valve must be closed with enough force to achieve shutoff while avoiding excessive torque which
will cause premature plug face wear.
If the valve has a lever actuator, follow the procedure below. If the valve has other than a lever
actuator, see the Instruction for that actuator.
For lever actuators, loosen the stop ring set screw, close the valve with the torque listed in Table A.
While maintaining that torque, position the stop ring against the torque wrench, then tighten the set
screw in the stop ring. Table A: Lever Actuator Seating Torques
Valve Size Seating Torque (ft lbs)
1/2 to 1” 9
1-1/4 & 1-1/2” 16
2” 24
2-1/2” 34
3” 52

DeZURIK
1/2- -- 3" PEC Eccentric Valves
D10095 Page 8April 2015
Disassembly
This valve is a pressure vessel. The bonnet will blow off the actuator if the bonnet
bolts are removed with pressure in the valve. Pressure must be completely released
before disassembly.
1. Relieve pipeline pressure.
2. Close the valve.
3. Remove the valve from the pipeline (if desired). It is not necessary to remove the valve from the
pipeline.
4. Scribe a line on the actuator housing, valve body, bonnet and plug stem to guide alignment
during reassembly.
5. Remove the actuator from the valve as described in the ACTUATOR REMOVAL section of the
Actuator Instructions.
6. Remove the lock nut, washer and spring from the stud.
7. Remove the bolts securing the bonnet in place, then pry the bonnet loose from the valve body.
8. Remove the plug from the valve body.
9. Pull the felt washer and seal from the bonnet.
10. Drive the bearing out of the bonnet using a hammer and pin punch.
11. Remove the bearing from the valve body. The bearing can be chiseled out, or it can be
hydraulically forced out.
To hydraulically force the bearing out:
1. Fill the interior diameter of the bearing with water.
2. Pound a shaft with the same outside diameter as the lower journal of the valve plug into
the bearing
Figure 3 — Hydraulically Removing the Lower Bearing
12. Scrape all gasket material from the bonnet and body.

DeZURIK
1/2–3" PEC Eccentric Valves
April 2015 Page 9 D10095
Reassembly
1. Push a new lower bearing into the valve body, then lubricate the bearing as described in the
“Lubrication” section.
2. Set a new gasket in the valve body.
3. Press a new bearing into the valve bonnet.
4. Push a new seal into the bonnet. See Figure 4 for correct installation.
Figure 4 — Bearing and Stem Seal Arrangement
5. Lubricate the upper plug journal, then slide the bonnet down the plug until it contacts the valve
body.
6. Line up the scribe marks on the plug stem, bonnet and valve body.
7. Fasten the bonnet to the body.
8. Lubricate the felt washer, then slide it down the plug stem until it fits in the counterbore in the
bonnet.
9. Install the actuator as described in the Actuator Instructions.
Note: If actuator mounting bolts are 1/4 inch bolts, do not exceed 100 inch pounds when
tightening them.
10. Slide the spring and washer down the plug stud, and screw the lock nut onto the stud.
11. Tighten the lock nut on the plug stud to compress the spring slightly. The spring tension lifts the
plug so the shoulder of the plug compresses the stem seal.
12. Adjust the closed position stop as described in the CLOSED POSITION ADJUSTMENT in these
instructions.

DeZURIK
1/2- -- 3" PEC Eccentric Valves
D10095 Page 10 April 2015
Removing Valve from Pipeline
To remove the entire valve assembly from the pipeline, follow these steps.
This valve is a pressure vessel. The bonnet will blow off the actuator if the bonnet
bolts are removed with pressure in the valve. Pressure must be completely released
before disassembly.
1. Relieve pipeline pressure and drain portion of system where valve is located.
2. 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.
3. If the actuator is powered, disconnect and lock out the pneumatic, hydraulic, or electrical power
to prevent accidental operation of the actuator.
4. Support the valve assembly, then remove the flange bolts.
5. Remove the valve from the pipeline.
Field Test
Stroke the valve between the fully open and fully closed positions to verify that the valve and actuator
are functioning properly.
Emergency Operation
Operate the valve as under normal conditions, taking care to bring the plug to the position required by
the particular emergency condition.
Predicted Wear of Parts
Length of service for parts subject to wear is dependent on service conditions.