DeZurik PTW Manuel utilisateur

DeZURIK 2-16" PTW & PFW

TAPERED PLUG VALVES

Instruction D10188

April 2015

DeZURIK

2- -- 16" PTW & PFW Tapered Plug Valves

Instructions

These instructions provide information about Tapered Plug Valves. They are for use by personnel who

are responsible for installation, operation and maintenance of Tapered Plug 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 Tapered Plug 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

2- -- 16" PTW & PFW Tapered Plug Valves

April 2015 Page 3 D10188

Table of Contents

Description - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4

Handling - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4

Required Tools - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4

Installation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4

Flow Direction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4

Lubrication - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4

Packing - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5

Plug Journals and Lubrication - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5

Fusion/Powder Coated Valves - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6

Packing Adjustment - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6

Plug Clearance Adjustment - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6

Packing Replacement - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6

Disassembly - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8

Reassembly - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9

Removing Valve from Pipeline - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 10

Field Test - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 10

Emergency Operation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 10

Predicted Wear of Parts - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 10

Troubleshooting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 11

DeZURIK

2- -- 16" PTW & PFW Tapered Plug Valves

D10188 Page 4April 2015

Description

The 3-Way (PTW) and 4-Way (PFW) Tapered Plug valves are available with material, actuator and

accessory options to meet a wide range of application requirements.

Three plug styles are offered to provide flow paths with 90 and 360 degree plug rotation. Each different

flow path arrangement has a unique number called a Combination Number. See the Product Bulletin for

these valves for a complete description of the Combination Numbers.

If an actuator other than a DeZURIK is to be mounted, the actuator must be capable of maintaining the

valve plug position with flow in the pipeline.

This valve is a pressure vessel. Failure to release pipeline pressure may result in

personal injury and/or flow system damage. Completely release pipeline pressure

before removing the actuator from the valve or removing the valve from the pipeline.

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

This Instruction Manual covers the installation requirements of the valve only. For actuator or accessory

installation information, see the Instruction Manual for that component.

Flow Direction

It is recommended that the valve be installed so pipeline pressure will push the plug into the seat(s) of

the port(s) being sealed.

Lubrication

This valve does not require routine maintenance lubrication. If the valve is disassembled, lubricate the

packing and plug journals as follows:

DeZURIK

2- -- 16" PTW & PFW Tapered Plug Valves

April 2015 Page 5 D10188

Lubrication (Continued)

Packing

Packing lubrication requirements are dependent upon the packing material.

•PTFE PACKING: Requires no lubrication.

•ALL PACKING OTHER THAN PTFE: Apply a light coat to the inside and outside diameters

of the packing rings 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)

Note: Ensure lubricant is compatible with flow media.

Plug Journals and Lubrication

Plug journal lubrication is dependent upon the materials used in construction of the valve.

•CAST IRON, NI-RESIST, BRONZE AND ACID BRONZE VALVES: Lubricate the journals on the plug

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)

•ALL VALVES EXCEPT CAST IRON, NI-RESIST, BRONZE, & ACID BRONZE: Coat the journals on

the plug with a light coat using one of these lubricants.

- Dow Corning Molykote G Rapid paste (recommended)

- Shell Retinax AM (alternate)

- Shell Lithall MDS (alternate)

Then lubricate with a mixture of powdered graphite and one of these lubricants.

- Standard Oil #140 Gear Lube (recommended)

- Mobil Mobilgear 634 (alternate)

- Shell Omala 460 (alternate)

- Texaco Meropa 460 (alternate)

- Amoco MP (alternate)

•HARD RUBBER LINED VALVES: Lubricate the journals on the plug using one of these

lubricants.

- Dow Corning Molykote #44 (recommended)

- Magnalube G (alternate)

- Texaco Molytex E.P. Grade 2 (alternate)

DeZURIK

2- -- 16" PTW & PFW Tapered Plug Valves

D10188 Page 6April 2015

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.

Packing Adjustment

All standard tapered plug valves feature adjustable stem seal packing. If a stem seal packing leak

should occur, tighten the gland nuts evenly just until the leakage stops.

Note: Do Not continue tightening after leakage stops. If packing leakage cannot be stopped by tightening

the gland nuts, the packing must be replaced.

Plug Clearance Adjustment

On valves not utilizing a Lift, Turn, Reseat actuator, the seat/plug clearance can be adjusted by

removing the locknut and wrenching square from the top of the valve, then turning the plug adjusting

nut to change the seat/plug clearance. Turning the nut clockwise will increase the clearance between

the seat and plug; turning the nut counterclockwise will decrease the clearance. Recommended seat

plug clearance is .030" for paper stock and .010" for all other applications.

Packing Replacement

Follow these steps to replace the packing with the actuator removed:

1. Discontinue pipeline flow and relieve pipeline pressure.

2. Scribe the actuator and valve bonnet for alignment when reassembling.

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.

DeZURIK

2- -- 16" PTW & PFW Tapered Plug Valves

April 2015 Page 7 D10188

Packing Replacement (Continued)

When a tapered plug 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.

4. Remove the actuator from the valve. See Actuator Instructions.

5. Remove the actuator adaptor (when used) from the valve.

6. Remove the packing gland nuts, then slide the packing gland off the valve shaft.

7. Pull the packing out of the bonnet.

8. Lubricate the new packing, then install it one ring at a time in the sequence shown in Figure 1.

Packing Replacement (Continued)

Figure 1—Correct Packing Installation Sequence

9. Slide the packing gland down the valve shaft and over the studs.

10. Turn the packing gland nuts onto the studs until they touch the packing gland, then one more

turn.

Note: This is a preliminary adjustment, it will be necessary to adjust the packing gland nuts after the

valve is pressurized.

11. Fasten the adaptor (when used) to the valve, lining up the scribe marks made during

disassembly.

12. Install the actuator as described in the Actuator Instructions.

13. If the actuator is a powered actuator, reconnect power to the actuator.

DeZURIK

2- -- 16" PTW & PFW Tapered Plug Valves

D10188 Page 8April 2015

Disassembly

Follow these steps to disassemble valve:

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.

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. Scribe a line on the actuator, body & bonnet for alignment when reassembling.

4. Remove the valve from the pipeline (if desired).

Note: The valve can be disassembled while still in the pipeline.

When a tapered plug 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. Note the orientation of the plug in relationship to the valve ports. (See Figure 2 for markings.)

Figure 2—Plug Stem Markings

7. Remove the bolts that hold the bonnet in place, then pry the bonnet loose from the valve body.

8. Remove the plug from the valve body.

9. Remove the gland nuts and gland from the bonnet.

10. Remove the packing from the bonnet.

DeZURIK

2- -- 16" PTW & PFW Tapered Plug Valves

April 2015 Page 9 D10188

Disassembly (Continued)

11. Reaching through the packing chamber in the bonnet, drive the upper bearing out of the bonnet

using a hammer and pin punch.

12. Remove the lower bearing from the valve body.

Note: The bearing can be chiseled out; or, it can be hydraulically forced out. See Figure 3.

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

Reassembly

1. Push a new lower bearing into the valve body, then lubricate the bearing as described in the

LUBRICATION section of these instructions.

2. Place the plug into the valve body so the lower journal slides into the bearing. Turn the plug so it

is in position noted during disassembly.

3. Set a new gasket in the body.

4. Push a new bearing into the bonnet, then lubricate the bearing. See LUBRICATION section of

these instructions

5. Place bonnet on valve, align scribe marks, then fasten bonnet in place.

6. Lubricate the new packing, then install it one ring at a time. See Figure 1.

7. Slide the packing gland down the valve shaft and over the studs.

8. Turn the packing gland nuts onto the studs until they contact the packing gland, then one

additional turn.

Note: This is a preliminary adjustment, it will be necessary to adjust the packing gland nuts after the

valve is pressurized. See PACKING ADJUSTMENTS in these instructions.

9. Install the actuator—see Actuator Instructions.

DeZURIK

2- -- 16" PTW & PFW Tapered Plug Valves

D10188 Page 10 April 2015

Reassembly (Continued)

10. If the actuator is a powered actuator, reconnect power to the actuator.

11. After pipeline flow is restored, check the packing for leakage.

Note: If packing leaks, tighten the packing gland nuts only enough to stop the leak. Over tightening the

packing will cause premature packing failure and higher valve operating torque.

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.

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. Support the valve assembly, then remove the flange bolts.

4. Remove the valve from the pipeline.

Field Test

Stroke the valve between ports 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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