Table of Contents
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Summary of Contents for DeZurik PEC
- Page 1 DeZURIK 1/2-- - 3" PEC ECCENTRIC VALVES D10095 Instruction April 2015...
- Page 2 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.
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Page 3: Table Of Contents
DeZURIK 1/2–3" PEC Eccentric Valves Table of Contents Description - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -... -
Page 4: Description
1/2-- - 3" PEC Eccentric Valves 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. - Page 5 DeZURIK 1/2–3" 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 6: Lubrication
DeZURIK 1/2-- - 3" PEC Eccentric Valves 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. -
Page 7: Stem Seal Adjustment Lever Actuator
DeZURIK 1/2–3" PEC Eccentric Valves 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. -
Page 8: Disassembly
DeZURIK 1/2-- - 3" PEC Eccentric Valves 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. -
Page 9: Reassembly
DeZURIK 1/2–3" PEC Eccentric Valves 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. -
Page 10: Removing Valve From Pipeline
DeZURIK 1/2-- - 3" 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. 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. -
Page 11: Troubleshooting
DeZURIK 1/2–3" PEC Eccentric Valves Troubleshooting Symptom Possible Cause Corrective Action Adjust stem seal. (See “Stem Packing is loose. Seal Adjustment” section) Packing Leaks. Replace stem seal & stem seal Packing is worn. filler. (See “Disassembly & Reassembly” sections) Open the valve completely to flush object. - Page 12 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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