DeZurik PFW Manual Download Page 4 | Manualshive

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DeZurik PFW Manual Download Page 4

DeZURIK

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

D10188

Page 4

April 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:

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Summary of Contents for PFW

Page 1: ...DeZURIK 2 16 PTW PFW TAPERED PLUG VALVES Instruction D10188 April 2015 ...

Page 2: ... 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 Re...

Page 3: ...nstallation 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 ...

Page 4: ... 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...

Page 5: ...RONZE 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 ...

Page 6: ...ug 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...

Page 7: ...ng 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...

Page 8: ...e 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...

Page 9: ...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 ...

Page 10: ...eased 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 th...

Page 11: ...acking is worn Replace Packing Valve does not close Object is wedged between plug and seat Open the valve completely to flush object If this doesn t work remove valve from the pipeline Actuator closed position is out of adjustment Adjust the closed position stop See Actuator Instructions Valve leaks when closed Plug is worn or damaged Replace plug Rubber on plug is torn ...

Page 12: ...antee shall be null and void if after shipment from our factory the item is modified in any way or a component of another manufacturer such as but not limited to an actuator is attached to the item by anyone other than DeZURIK Inc Factory Service personnel All orders accepted shall be deemed accepted subject to this limited warranty which shall be exclusive of any other or previous Warranty and th...

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