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Summary of Contents for DeZurik PEC 3650
- Page 1 DeZURIK 3650-7200 PEC ECCENTRIC VALVES D10019 Instruction April 2015...
- Page 2 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.
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Page 3: Table Of Contents
DeZURIK 3650-7200 PEC Eccentric Valves Table of Contents Description - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -... -
Page 4: Description
The valve rotates 90 degrees from full open to full closed. Clockwise rotation of the valve stem closes the valve. 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. -
Page 5: Required Tools
DeZURIK 3650-7200 PEC Eccentric Valves Required Tools To adjust the packing, you will need a socket and ratchet handle to remove the access cover screws. • 1/2" socket for all sizes To adjust the four packing nuts, you will need a combination wrench. -
Page 6: Exploded Assembly Drawing
DeZURIK 3650-7200 PEC Eccentric Valves Exploded Assembly Drawing Figure 1— Exploded Assembly Drawing D10019 Page 6 April 2015... -
Page 7: Installation
DeZURIK 3650-7200 PEC Eccentric Valves 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. - Page 8 DeZURIK 3650-7200 PEC Eccentric Valves 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.
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Page 9: Closed Position
DeZURIK 3650-7200 PEC Eccentric Valves Closed Position Because of the eccentric action of this valve, the closed position of the valve is dependent upon the pressure drop expected when the valve is closed. To adjust the valve closed position, follow these steps: 1. -
Page 10: Packing Replacement
DeZURIK 3650-7200 PEC Eccentric Valves Packing Replacement Replacing Packing with Actuator Removed To replace the packing without removing actuator, see “Replacing Packing Without Removing Actuator” section. 1. Discontinue pipeline flow and relieve pipeline pressure. 2. Scribe the actuator and valve bonnet for alignment when reassembling. - Page 11 DeZURIK 3650-7200 PEC Eccentric Valves Packing Replacement (continued) 10. Slide the packing gland down the plug stem so the four studs in the bonnet go into the holes in the packing gland. Thread nuts onto the studs until they touch the gland, then tighten one more turn.
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Page 12: Replacing Packing Without Removing Actuator
Because disassembly and reassembly are major operations, you might wish to repair the rubber face while the valve is still fully assembled. Consult the DeZURIK factory for the correct repair kit and procedure for your valve. - Page 13 DeZURIK 3650-7200 PEC Eccentric Valves Disassembly (continued) 7. Clamp onto the plug stem, and lift the bonnet and plug together from the valve body. When the lower plug journal clears the lower bearing, the plug will swing suddenly toward the center of the valve. Take all precautions necessary so this sudden motion of the plug does not cause any personal injuries or equipment damage.
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Page 14: Reassembly
DeZURIK 3650-7200 PEC Eccentric Valves Reassembly Installation of the plug during reassembly will be much easier if the body is blocked up so the bottom journal cover can be removed, and a bar used to guide the lower plug journal into the lower bearing. - Page 15 DeZURIK 3650-7200 PEC Eccentric Valves Reassembly (continued) 11. Slide the packing gland down the plug stem so the four studs in the bonnet go into the holes in the packing gland. Thread nuts onto the studs until they touch the gland, then tighten one more turn.
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Page 16: Removing Valve From Pipeline
DeZURIK 3650-7200 PEC Eccentric Valves Removing Valve from Pipeline To remove the entire valve assembly from the pipeline, follow these steps. 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. -
Page 17: Troubleshooting
DeZURIK 3650-7200 PEC Eccentric Valves Troubleshooting Symptom Possible Cause Corrective Action Adjust Packing. Packing is loose. (See Packing Adjustment section) Packing Leaks. Replace Packing. Packing is worn. (See Packing Replacement section) Completely open the valve to flush object from the valve. - Page 18 No claim for transportation, labor or special or consequential damages or any other loss, cost or damage shall be allowed. You shall be solely responsible for determining suitability for use and in no event shall DeZURIK, Inc. be liable in this respect.
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