DeZurik PEC Manuel utilisateur

DeZURIK 1/2- -- 3" PEC

ECCENTRIC VALVES

Instruction D10095

April 2015

DeZURIK

1/2- -- 3" PEC Eccentric Valves

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.

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