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Ppt 0

  1. 1. START-UP AND OPERATION OF MECHANICALLY SEALED EQUIPMENT 1:13
  2. 2. START UP & OPERATION SEALS ARE ESPECIALLY VULNERABLE DURING THIS TIME, SO IT IS IMPORTANT TO GIVE ATTENTION TO THE FOLLOWING INFORMATION...
  3. 3. SINGLE INSIDE SEAL <ul><li>Start-Up Procedures </li></ul><ul><ul><li>Gradually Heat up or Chill Down if Applicable </li></ul></ul><ul><ul><li>Heating / Cooling on </li></ul></ul><ul><ul><li>Steam / Gas Purge on </li></ul></ul><ul><ul><li>Verify that Environmental Control Piping is Properly Connected </li></ul></ul>
  4. 4. <ul><li>Start-Up Procedures </li></ul><ul><ul><li>Suction Valve Open </li></ul></ul><ul><ul><li>Discharge Valve Closed to One-Quarter open </li></ul></ul><ul><ul><li>Start Pump and Gradually Open Discharge Valve to Proper Flow </li></ul></ul>SINGLE INSIDE SEAL
  5. 5. <ul><li>Operating Procedures </li></ul><ul><li>After Start-Up, Check for: Leakage, Squealing, Vibration or Cavitation </li></ul><ul><li>Never Adjust Flow with the Suction Valve. It must ALWAYS BE WIDE OPEN </li></ul><ul><li>If the Pump is Running Dry, the Seal is Not Being Lubricated. Severe damage to the seal and/or pump may occur. Turn the Pump Off Immediately </li></ul>SINGLE INSIDE SEAL
  6. 6. DUAL PRESSURIZED SEAL <ul><li>Start-Up Procedures </li></ul><ul><li>Gradually Heat up or Chill Down if Applicable </li></ul><ul><li>Heating / Cooling on </li></ul><ul><li>Steam / Gas Purge on </li></ul><ul><li>Verify that Environmental Control Piping is Properly Connected </li></ul>
  7. 7. DUAL PRESSURIZED SEAL <ul><li>Start-Up Procedures </li></ul><ul><li>Ensure Adequate Liquid Level in Buffer Supply Tank or </li></ul><ul><li>Ensure that Barrier System is Operational </li></ul><ul><li>Double Check Barrier Piping to the Seal Inlet & Outlet to Ensure that They are Correct for Pump Rotation </li></ul>
  8. 8. DUAL PRESSURIZED SEAL <ul><li>Start-Up Procedures </li></ul><ul><ul><li>Apply and Check for Adequate Barrier System flow through the Seal </li></ul></ul><ul><ul><li>Ensure that Barrier Pressure is 20 to 25 psi. Greater than Anticipated Stuffing Box Pressure (Suction + %(Differential)) </li></ul></ul>
  9. 9. DUAL PRESSURIZED SEAL <ul><li>Start-Up Procedures </li></ul><ul><ul><li>Suction Valve Open </li></ul></ul><ul><ul><li>Discharge Valve Closed to One-Quarter Open </li></ul></ul><ul><ul><li>Start Pump </li></ul></ul><ul><ul><li>Gradually Open Discharge Valve to Full Open </li></ul></ul>
  10. 10. <ul><li>Operating Procedures </li></ul><ul><li>After Start-Up, Check for: Leakage, Squealing, Vibration or Cavitation </li></ul><ul><li>Never Adjust Flow with the Suction Valve. It must ALWAYS BE WIDE OPEN </li></ul><ul><li>If the Pump is Running Dry, damage may occur to the pump. Turn the Pump Off </li></ul>DUAL PRESSURIZED SEAL
  11. 11. <ul><li>Operating Procedures </li></ul><ul><li>Never Remove Barrier Supply from the Seal While the Pump has Process Liquid Applied </li></ul><ul><li>If Seal Begins to Leak Barrier Fluid to Atmosphere, Plan Maintenance as Soon as Possible. Delaying Removal may Damage the Seal Beyond Economical Repairability </li></ul>DUAL PRESSURIZED SEAL
  12. 12. Reminders <ul><li>The Pumped Liquid Lubricates Single and Non- Pressurized Inner Seals only! Dry running destroys them ! </li></ul><ul><li>Suction Valve Always Wide Open Before Pump Start-Up </li></ul><ul><li>Heat or Cool Gradually </li></ul><ul><li>Never Throttle a Pump with the Suction Valve </li></ul><ul><li>Start a Centrifugal Pump with the Discharge Valve 25 Percent Open Where Possible </li></ul><ul><li>Always Start a Positive Displacement Pump with the Suction and Discharge Valves Wide Open </li></ul>
  13. 13. Reminders <ul><li>Report Cavitation, Vibration, Leakage, Squealing </li></ul><ul><li>Do Not Run a Pump at Shut-Off </li></ul><ul><li>Barrier Liquids for Pressurized Seals Must Be Pressurized Before the Pump Valves are Opened </li></ul><ul><li>Barrier Fluid Circulation Systems Must Be Operational and Applied Before the Pump Valves are Opened </li></ul><ul><li>Inlet & Outlet Must be Piped in Accordance with Specified Rotation of The Pump </li></ul>
  14. 14. Reminders <ul><ul><li>Use Tubing Where Possible </li></ul></ul><ul><ul><li>Do Not Tie Inlet & Outlet Lines Together </li></ul></ul><ul><ul><li>Do Not Remove Pressure Source to Add Barrier Fluid to a Sealing System that is in Operation </li></ul></ul><ul><ul><li>Seal & Piping System Must Not Trap Air Anywhere </li></ul></ul><ul><ul><li>All Supply Lines Must Slope up to Reservoir / Tank </li></ul></ul><ul><ul><li>Flush Out All System Components after a Seal Failure </li></ul></ul>
  15. 15. END START-UP AND OPERATION OF MECHANICALLY SEALED EQUIPMENT

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