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The shut-off pressure for centrifugal pumps shall be based on the design maximum pump suction pressure plus 125% head at the rated capacity. Note the maximum suction pressure shall be based on pump out from the source vessel at its maximum liquid level and normal operating pressure.
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ÀÌ¿¡ µû¸£¸é shut-off pressure = maximum pump suction pressure + 125% head(design head ·Î ÃßÁ¤??) at the rated capacity ·Î µÇ¾î ÀÖ½À´Ï´Ù.
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'max suc. press. at shut-off(3): À¯·®ÀÌ ¾øÀ» ¶§ ÃÖ°í ÈíÀÔÃø ¾Ð·Â. ÆßÇÁÀÇ shut off discharge pressure ÃßÁ¤ À§ÇÔ.'
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Áú¹®1) pump ÀÇ shut-off pressure ÃßÁ¤¿¡¼ max. suction pressure ÀÇ Á¶°ÇÀÌ at rated capacity(¿Ü±¹»ç) ÀÎÁö at shut-off(½ºÅ×Æijë´Ô) ÀÎÁö ±Ã±ÝÇÕ´Ï´Ù. ¾Æ´Ï¸é Á¦°¡ ÀÌÇØÇÏÁö ¸øÇÏ°í ÀÖ´Â ³»¿ëÀÌ ÀÖ´Â °ÍÀΰ¡¿ä?
Áú¹®2) max. suction pressure at shut-off ¿¡¼ Á¶°ÇÀÌ shut-off ¶õ À¯·®ÀÌ ¾øÀ»¶§Àε¥ µüÈ÷ ¸Ó¸®¿¡ ±×¸²ÀÌ ¶°¿À¸£Áö ¾Ê½À´Ï´Ù. À¯·®ÀÌ ¾ø´Ù´Â ¸»ÀÌ ¹«½¼À̾߱âÀÎÁö ±Ã±ÝÇÕ´Ï´Ù.
Áú¹®3) ¿Ü±¹»ç design criteria ¿¡¼ 125% head ¶ó´Â ¸»ÀÌ Àִµ¥ µµ¹«Áö ¾îµð¼ ³ª¿Â ¼öÄ¡ÀÎÁö Ȥ½Ã °æÇè¿¡¼¶óµµ ¾Ë°í °è½ÅÁö¿ä?