Heater Charge Pump Isolation Valves

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- January 25, 2005 at 2:36 pm #4388
  
  John Parks
  Participant
  
  We currently have steam purged ball valves for isolating the heater charge pumps. The problem is that sometimes the discharge pressure is too high and we get resid into our steam system. We are looking at a variety of options. One option is to find a valve that does not require a steam purge. Are people using valves without steam purges for this service?
  
  Thanks
- January 25, 2005 at 8:29 pm #7865
  
  coker squirrel
  Participant
  
  We use regular gate valves without steam purge for the Heater Charge pump isolation.
- February 9, 2005 at 10:21 am #7853
  
  RAJEEV NARAYAN
  Participant
  
  We too do not have steam purge on Charge pump isolation valves. I do not think that is required. With regard to you HC backing up problem, don’t you have a NRV in the steam purge line?
- August 15, 2007 at 3:55 am #7324
  
  Neelabh Sharma
  Participant
  
  Yup ..Same here..simple Gate valves in both the suction & discharge line of Charge Pump…working well…for past many years…never faced any problems…
- September 22, 2007 at 3:40 am #7269
  
  Mrityunjay Singh
  Participant
  
  Why steam purge type of isolation valves are required for the heater charge pump? What is the operating temperature of your pump? In normal cases the charge pumps are operated in the range of 300 to 370 deg C, which is not the coking temperature of the feed. We are using normal gate valves for isolation of our charge pump in our units since last several years without any problem.
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Heater Charge Pump Isolation Valves

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