manualshive.com logo in svg

DeZurik PEF, Installation And Operation Manual, Page: 15 / 20

Share
Download
DeZurik PEF Installation And Operation Manual Download Page 15

  

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). 

Summary of Contents for PEF

Page 1: ...DeZURIK 3 36 PEF 100 PORT ECCENTRIC PLUG VALVES Instruction D10453 April 2015 ...

Page 2: ...h hazardous pipeline materials Handle valves which have been removed from service with suitable protection for any potential pipeline material in the valve Inspection Your PEF 100 Port Eccentric 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 a...

Page 3: ...tor Stop Adjustments Closed Position 9 Lubrication 9 Packing 9 Plug Journals 10 Thrust Washers and O rings 10 Packing Adjustment 10 3 8 Lever and Nut Operated Valves 10 All Other Actuators 10 Parts Identification 11 Packing Replacement Replace packing with Actuator Removed 12 Replace Packing without Removing Actuator 14 Disassembly 15 Reassembly 17 Removing Valve from Pipeline 18 Field Test 19 Val...

Page 4: ...g 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...

Page 5: ...ve foreign material such as weld spatter oil grease and dirt from the pipeline 2 Prepare pipe ends and install valves in accordance with the pipe manufacture s instructions for the joint used Note See Figure 1 for proper valve orientation Do not deflect the pipe valve joint Minimize bending stresses in the valve end connection with pipe loading 3 Ensure the valve and flanges are concentric to ensu...

Page 6: ...DeZURIK 3 36 PEF 100 Port Eccentric Plug Valves D10453 Page 6 April 2015 Installation Continued Figure 1 Liquids without Suspended Solids and Clean Gases ...

Page 7: ...ends and install valves in accordance with the pipe manufacture s instructions for the joint used Note See Figure 2 for proper valve orientation 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 Do not deflect the pipe valve joint Minimize bending stres...

Page 8: ...DeZURIK 3 36 PEF 100 Port Eccentric Plug Valves D10453 Page 8 April 2015 Installation Continued Figure 2 Liquids with Suspended Solids and Dirty Gases ...

Page 9: ...n the Actuator Instructions 4 Close the valve with the torque specified in the Actuator Instructions Note This torque is the amount required to seat the plug for a given pressure drop across the valve To avoid excessive plug and seat wear caused by over torquing use the actual pressure drop across the valve when determining correct closing torque 5 After the valve has been closed using the correct...

Page 10: ...ers and O rings using one of these lubricants Lubriplate Clearplex 2 recommended Phillips Philube PF alternate Mobilgrease FM 101 alternate Amoco FG alternate Note Ensure lubricant is compatible with flow media Packing Adjustment The stem seal tightening procedure is dependent upon the type of actuator on the valve If a packing leak should occur tighten the packing as follows 3 8 Lever and Nut Ope...

Page 11: ...DeZURIK 3 36 PEF 100 Port Eccentric Plug Valves April 2015 Page 11 D10453 Figure 3 Parts Identification ...

Page 12: ...nnect and lock out the pneumatic hydraulic or electrical power to prevent accidental operation of the actuator 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 actu...

Page 13: ...lve has a friction cone A21 bring the gland nuts A13 under the gland up finger tight Figure 5 Friction Cone Adjustment 10 Adjust gland nuts A13 3 8 LEVER AND NUT OPERATED VALVES ONLY Turn gland nuts A13 onto the studs A12 until they touch the gland A11 Note This is a preliminary adjustment it will be necessary to adjust the gland nuts A13 after the valve is pressurized See Packing Adjustment secti...

Page 14: ... the gland A11 up the stem of the plug A3 4 Remove the studs A12 from the bonnet A6 5 Cut and completely remove all of the old packing A9 from the packing chamber in the bonnet A6 6 Cut each new packing ring A9 radially in one place with a razor sharp knife 7 Place each new packing ring A9 one at a time with the joints staggered around the plug stem A3 and into position in the packing chamber 8 Re...

Page 15: ... 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...

Page 16: ...aulically forced out See Figure 6 For 24 36 valves the bearing A2 can be driven out of the body A1 using a hammer and pin punch First remove the screws A18 and journal cover A17 from the body Remove the old o ring 16 from the journal cover To hydraulically force the bearing A2 out of 3 20 valve body 1 Fill the interior diameter of the bearing A2 with water 2 Pound a shaft with the same outside dia...

Page 17: ...G TAG from the factory Secure WARNING TAG A14 to bonnet A6 with one of the bonnet screws A8 at the location noted during disassembly 8 Turn the plug A3 to the closed position See Actuator Stop Adjustments section 9 For valves with low friction packing lubricate the new packing A9 then install it one ring at a time See Figure 4 Note 3 8 valves use a friction cone A21 with a wrenching nut or hand le...

Page 18: ...connect power to the actuator 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 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 1 Relieve pipeline pressure and drain portion o...

Page 19: ...lves in less critical installations The time period for valve exercising should be based on local experience 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 Troubleshooting Symptom Possib...

Page 20: ...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...

Reviews:

No comments