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  PSV sizing ½Ã, superimposed back pressure ¹®ÀÇ
  ±Û¾´ÀÌ : ÀºÀ¯¾Æºü   °íÀ¯ID : jeraldin     ³¯Â¥ : 19-05-15 11:01     Á¶È¸ : 4383    
¾È³çÇϼ¼¿ä? Ç×»ó °¨»çµå¸³´Ï´Ù.

PSV sizingÀ» ÇÏ°í Àִµ¥, PSV destinationÀÌ flare header°¡ ¾Æ´Ï¶ó pressure control µÇ°í ÀÖ´Â
surge drum(9barg)À¸·Î °¡´Â PSV°¡ ÀÖ½À´Ï´Ù. ÀÌ·² °æ¿ì, superimposed back pressure¸¦ ¾î¶»°Ô
°¡Á®°¡¾ß ÇÒ Áö Àǹ®ÀÔ´Ï´Ù. 9 barg·Î °¡Á¤ÇÏ°Ô µÇ¸é, set pressureÀÎ 15.2 bargÀÇ 50%º¸´Ùµµ ³ô¾Æ pilot
typeÀ¸·Îµµ cover°¡ ¾ÈµÇ´Â °Í °°½À´Ï´Ù.

ÀÌ·± °æ¿ìÀÇ PSV sizingÀº ¾î¶»°Ô ÇØ¾ß ÇÒ±î¿ä?


½ºÅ×Æijë Stefano   19-05-15 11:43
Back Pressure(Superimposed Back Pressure + Built-up Back Pressure)°¡ Sep PressureÀÇ 30~50%ÀÏ°æ¿ì Balanced PSV,  ±× ÀÌ»óÀ̸é Pilot Operated PSV¸¦ »ç¿ëÇÏ¸é µÇÁö¿ä.
ÀºÀ¯¾Æºü jeraldin   19-05-15 15:28
Á¦°¡ Pilot Operated PSVÀÇ °æ¿ì 50%¸¦ ³ÑÀ¸¸é ¾ÈµÈ´Ù°í Âø°¢Çß¾ú³×¿ä.. Á˼ÛÇÕ´Ï´Ù.
¾ðÁ¨°¡ ¼±¹è¿£Áö´Ï¾î·ÎºÎÅÍ Superimposed Back PressureÀÇ ¾Ð·ÂÀÌ ³ô´õ¶óµµ(ex. 9 barg) constantÇÏ°í bulit-up back pressure°¡ set pressureÀÇ 10%³ÑÁö ¾ÊÀ¸¸é conventionalÀ» ¾µ ¼ö ÀÖ´Ù°í µéÀº ÀûÀÌ ÀÖ¾ú´Âµ¥, °ü·Ã ±Ù°Å´Â ¸íÈ®ÇÏÁö ¾ÊÀº °Í °°½À´Ï´Ù. À§ÀÇ ¼³¸íÀÌ ÇÕ¸®ÀûÀÎ °ÍÀÎÁö¿ä?
Stefano    19-05-15 17:02
API 521¿¡µµ ¸íÈ®ÇÑ ±Ù°Å°¡ ³ª¿Í ÀÖÁö ¾ÊÀºµ¥ ÀϹÝÀûÀÎ ±Ù°ÅÀڷḦ ã¾Æº¸´Ï.. 
~10% : Conventioal,  10~40%: Bellows-sealed: >40%: Pilot Operated ¶ó°í µÇ¾îÀÖ´Â °÷ÀÌ º¸ÀÔ´Ï´Ù.    http://inko.com.sg/image/data/CATALOG/Valve/Safety%20valve.pdf 

Balanced TypeÀÇ Çã¿ë¹üÀ§¿¡ Á¶±Ý¾¿ Â÷ÀÌ°¡ Àִµ¥  ÃÖ´ë°ªÀ¸·Î 45~50%±îÁö¸¦ Vendor ÀÚü Çã¿ëÇѵµ·Î ÇÑ´Ù°í ÇÏ´Â °Í °°½À´Ï´Ù.
ÇÇ°ïÇÑ°õµ¹¡¦ chaser72   20-04-24 11:59
´Ã ±¸Ã¼ÀûÀÌ°í Á¤È®ÇÑ Á¤º¸¿¡ °¨»çµå¸³´Ï´Ù.

Ãß°¡ÀûÀ¸·Î Àúµµ ±Ã±ÝÇÑ°Ô ÀÖ¾î ¹®Àǵ帳´Ï´Ù.
PSV Type ¼±Á¤ ½Ã, (Conventional vs Balanced(Bellows))ÀÇ ±âÁØÀÌ Back Pr'(¹è¾Ð)¶ó°í ¾Ë°íÀÖ½À´Ï´Ù¸¸.

À̶§ÀÇ Back Pr'ÀÇ ±âÁØÀÌ ´Ü¼ø Built-Up Back Pr'(¿îÀü¹è¾Ð)¸¸ ¸»ÇÏ´Â °ÇÁö, Total Back Pr'(Àüü¹è¾Ð)¸¦ ¸»ÇÏ´Â °ÇÁö Çò°¥¸³´Ï´Ù.

¸¸¾à, Superimposed Back Pr'(Á¤Áö¹è¾Ð)¸¸ Á¸ÀçÇÏ°í ¿îÀü ¹è¾ÐÀº ¾ø´Ù¸é Conventional TypeÀ» ¼±Á¤Çϴ°ÍÀÌ ¸Â´ÂÁö?
 
1) À̶§´Â ´Ü¼ø ¿îÀü¹è¾ÐÀÌ ±âÁØÀ̶ó°í º»´Ù¸é Conventional TypeÀ̶ó »ý°¢µÇÁö¸¸,
2) Àüü¹è¾Ð À̶ó°í º»´Ù¸é Bellows TpyeÀ» ¼±Á¤ÇØ¾ß µÈ´Ù°í »ý°¢µË´Ï´Ù.

API RP 520À» ÅëÇØ È®ÀÎÇÏ¿´Áö¸¸, ¿©ÀüÈ÷ Àǹ®ÀÌ ³²¾Æ ¹®Àǵ帳´Ï´Ù.

Áú¹® ¿äÁö) PSV Type ¼±Á¤À» À§ÇÑ ¹è¾ÐÀÇ ±âÁØ
   

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