{"id":9315,"date":"2026-08-04T16:30:01","date_gmt":"2026-08-04T07:30:01","guid":{"rendered":"https:\/\/now0930.pe.kr\/wordpress\/?p=9315"},"modified":"2026-08-06T09:41:40","modified_gmt":"2026-08-06T00:41:40","slug":"valve-coefficient-control-valve-handbook-5%ec%9e%a5","status":"publish","type":"post","link":"https:\/\/now0930.pe.kr\/wordpress\/valve-coefficient-control-valve-handbook-5%ec%9e%a5\/","title":{"rendered":"Valve Coefficient, control Valve Handbook 5\uc7a5"},"content":{"rendered":"\n<!-- WordPress\uc758 '\uc0ac\uc6a9\uc790 \uc815\uc758 HTML' \ube14\ub85d\uc5d0 \uadf8\ub300\ub85c \ubd99\uc5ec\ub123\uc73c\uc2ed\uc2dc\uc624.\n<html>, <head>, <body> \ud0dc\uadf8\ub294 \ud3ec\ud568\ud558\uc9c0 \uc54a\uc558\uc2b5\ub2c8\ub2e4. -->\n<style>\n.cv-cv-wrap{max-width:1100px;margin:0 auto;color:#1f2937;font-family:\"Noto Sans KR\",\"Noto Sans\",Arial,sans-serif;font-size:17px;line-height:1.75;word-break:keep-all}\n.cv-cv-wrap *{box-sizing:border-box}.cv-cv-wrap h1,.cv-cv-wrap h2,.cv-cv-wrap h3{color:#1b4e79;line-height:1.35}\n.cv-cv-wrap h1{margin:0 0 8px;font-size:2.05rem;text-align:center}.cv-cv-wrap h2{margin:46px 0 18px;padding-bottom:8px;border-bottom:2px solid #1b4e79;font-size:1.5rem}\n.cv-cv-wrap h3{margin:28px 0 10px;font-size:1.18rem}.cv-cv-wrap p{margin:10px 0}.cv-cv-meta{margin:0 0 30px;color:#5b6470;text-align:center}\n.cv-cv-toc{margin:24px 0 34px;padding:18px 24px;background:#f8fafc;border:1px solid #dbe3ec;border-radius:8px}.cv-cv-toc ol{margin:8px 0 0;padding-left:1.3rem;columns:2;column-gap:30px}\n.cv-cv-toc li{break-inside:avoid;margin:4px 0}.cv-cv-toc a{color:#1b4e79;text-decoration:none}\n.cv-cv-box{margin:20px 0;padding:18px 20px;border:1px solid;border-radius:8px}.cv-cv-box-title{display:block;margin-bottom:8px}.cv-cv-key{background:#edf5fc;border-color:#1b4e79}\n.cv-cv-note{background:#f7f7f7;border-color:#6b7280}.cv-cv-warning{background:#fff9e0;border-color:#b7791f}\n.cv-cv-eq{margin:18px 0;padding:14px 18px;overflow-x:auto;border:1px solid #cbd5e1;border-radius:7px;background:#f8fafc;font-family:\"Times New Roman\",serif;font-size:1.08rem;text-align:center;white-space:nowrap}\n.cv-cv-eq .line{display:block;margin:4px 0}.cv-cv-flow{margin:20px 0;padding:16px 18px;border:1px solid #cbd5e1;border-radius:8px;background:#f8fafc;color:#1b4e79;font-weight:700;text-align:center}\n.cv-cv-table-wrap{width:100%;margin:18px 0 26px;overflow-x:auto}.cv-cv-wrap table{width:100%;border-collapse:collapse;font-size:.94rem}.cv-cv-wrap th,.cv-cv-wrap td{padding:10px 12px;border:1px solid #cbd5e1;vertical-align:top;text-align:left}\n.cv-cv-wrap th{background:#edf5fc;color:#163b61}.cv-cv-wrap ul,.cv-cv-wrap ol{padding-left:1.45rem}.cv-cv-wrap li{margin:5px 0}\n.cv-cv-code{display:block;margin:14px 0;padding:14px 16px;overflow-x:auto;border:1px solid #cbd5e1;border-radius:7px;background:#f7f7f7;font-family:Consolas,Monaco,monospace;font-size:.9rem;line-height:1.55;white-space:pre-wrap;word-break:break-word}\n.cv-cv-result{font-weight:700;color:#196c46}.cv-cv-link{color:#1b4e79;text-decoration:underline}\n@media(max-width:700px){.cv-cv-wrap{font-size:16px}.cv-cv-wrap h1{font-size:1.65rem}.cv-cv-toc ol{columns:1}}\n<\/style>\n\n<div class=\"cv-cv-wrap\">\n  <h1>\uc81c\uc5b4\ubc38\ube0c \uc720\ub7c9\uacc4\uc218 C<sub>v<\/sub>\uc640 \uc0b0\uc815 \ubc29\ubc95<\/h1>\n  <p class=\"cv-cv-meta\">\uae30\uc220\uc0ac \ub2f5\uc548\uc5d0 \ud544\uc694\ud55c \ud575\uc2ec \uc6d0\ub9ac\uc640 \uc120\uc815 \uc808\ucc28<\/p>\n\n  <nav class=\"cv-cv-toc\" aria-label=\"\ubaa9\ucc28\">\n    <strong>\ubaa9\ucc28<\/strong>\n    <ol>\n      <li><a href=\"#cv-cv-definition\">\uc815\uc758\uc640 \uc758\ubbf8<\/a><\/li>\n      <li><a href=\"#cv-cv-story\">\uc774\ud574\ub97c \uc704\ud55c \ud750\ub984 \uc774\uc57c\uae30<\/a><\/li>\n      <li><a href=\"#cv-cv-formula\">\uc561\uccb4\uc758 \ud575\uc2ec \uc218\uc2dd<\/a><\/li>\n      <li><a href=\"#cv-cv-example\">\uae30\uc220\uc0ac \uacc4\uc0b0 \uc608\uc2dc<\/a><\/li>\n      <li><a href=\"#cv-cv-correction\">\uc2e4\uc81c \uc124\uacc4\uc5d0\uc11c\uc758 \ubcf4\uc815<\/a><\/li>\n      <li><a href=\"#cv-cv-iteration\">\ubc18\ubcf5 \uc0b0\uc815\uc758 \uc758\ubbf8<\/a><\/li>\n      <li><a href=\"#cv-cv-errors\">\uacfc\uc18c\u00b7\uacfc\ub300 \uc120\uc815\uc758 \uc601\ud5a5<\/a><\/li>\n      <li><a href=\"#cv-cv-conclusion\">\ub2f5\uc548\uc6a9 \uacb0\ub860<\/a><\/li>\n      <li><a href=\"#cv-cv-references\">\ucc38\uace0\ubb38\ud5cc<\/a><\/li>\n      <li><a href=\"#cv-cv-json\">AI \uc778\uc2dd\uc6a9 JSON<\/a><\/li>\n    <\/ol>\n  <\/nav>\n\n  <div class=\"cv-cv-box cv-cv-key\">\n    <strong class=\"cv-cv-box-title\">\ud575\uc2ec \uacb0\ub860<\/strong>\n    <p>C<sub>v<\/sub>\ub294 \ubc38\ube0c\uc758 \ud638\uce6d \ud06c\uae30\uac00 \uc544\ub2c8\ub77c <strong>\ud2b9\uc815 \ubc38\ube0c\uc640 \uac1c\ub3c4\uc5d0\uc11c\uc758 \uc720\ub7c9 \ud1b5\uacfc \ub2a5\ub825<\/strong>\uc774\ub2e4.\n    \uacf5\uc815\uc870\uac74\uc73c\ub85c \ud544\uc694\ud55c C<sub>v<\/sub>\ub97c \uacc4\uc0b0\ud55c \ub4a4, \uc81c\uc870\uc0ac \uc790\ub8cc\uc5d0\uc11c \uadf8 \uac12\uc744 \uc801\uc815 \uac1c\ub3c4\ub85c \uc81c\uacf5\ud558\ub294 \ubc38\ube0c\ub97c \uc120\uc815\ud55c\ub2e4.<\/p>\n  <\/div>\n\n  <h2 id=\"cv-cv-definition\">\uc815\uc758\uc640 \uc758\ubbf8<\/h2>\n  <p>C<sub>v<\/sub>\ub294 \uc81c\uc5b4\ubc38\ube0c\uc758 \uc720\ub7c9 \ud1b5\uacfc \ub2a5\ub825\uc744 \ub098\ud0c0\ub0b4\ub294 \uacc4\uc218\uc774\ub2e4.<\/p>\n  <p>C<sub>v<\/sub> = 1\uc740 <strong>60 \u2109\uc758 \ubb3c\uc774 \ubc38\ube0c \uc804\ud6c4 \uc555\ub825\ucc28 1 psi\uc5d0\uc11c 1\ubd84 \ub3d9\uc548 1 US gallon \ud750\ub974\ub294 \ub2a5\ub825<\/strong>\uc744 \uc758\ubbf8\ud55c\ub2e4.\n  \ub530\ub77c\uc11c \uac19\uc740 \uc555\ub825\uac15\ud558\uc5d0\uc11c\ub294 C<sub>v<\/sub>\uac00 \ud074\uc218\ub85d \ub354 \ub9ce\uc740 \uc720\ub7c9\uc744 \ud1b5\uacfc\uc2dc\ud0a8\ub2e4.<\/p>\n\n  <div class=\"cv-cv-box cv-cv-note\">\n    <strong class=\"cv-cv-box-title\">\uad6c\ubd84<\/strong>\n    <p>\ud544\uc694 C<sub>v<\/sub>\ub294 \uacc4\uc0b0\uac12\uc774\uace0, \uc815\uaca9 C<sub>v<\/sub>\ub294 \uc81c\uc870\uc0ac\uac00 \uc2dc\ud5d8\ud558\uc5ec \uc81c\uc2dc\ud558\ub294 \uc81c\ud488\uac12\uc774\ub2e4.\n    \ub3d9\uc77c\ud55c NPS\ub77c\ub3c4 \ubc38\ube0c \ud615\uc2dd, \ud3ec\ud2b8, \ud2b8\ub9bc, \uc720\ub7c9\ud2b9\uc131 \ubc0f \uac1c\ub3c4\uc5d0 \ub530\ub77c \uc815\uaca9 C<sub>v<\/sub>\uac00 \ub2ec\ub77c\uc9c4\ub2e4.<\/p>\n  <\/div>\n\n  <h2 id=\"cv-cv-story\">\uc774\ud574\ub97c \uc704\ud55c \ud750\ub984 \uc774\uc57c\uae30<\/h2>\n  <p>\ud38c\ud504\uac00 \uc561\uccb4\ub97c \ubc30\uad00\uc73c\ub85c \ubcf4\ub0b4\uace0, \uc911\uac04\uc758 \uc81c\uc5b4\ubc38\ube0c\uac00 \uc720\ub7c9\uc744 \uc870\uc808\ud55c\ub2e4\uace0 \uac00\uc815\ud55c\ub2e4.\n  \ud544\uc694\ud55c \ubc38\ube0c \uc6a9\ub7c9\uc740 \ub2e4\uc74c \uc138 \uc870\uac74\uc73c\ub85c \uacb0\uc815\ub41c\ub2e4.<\/p>\n  <ol>\n    <li><strong>\uc694\uad6c \uc720\ub7c9 Q<\/strong>: \ub9ce\uc774 \ubcf4\ub0b4\ub824\uba74 \ub354 \ud070 \uc720\ub7c9\ub2a5\ub825\uc774 \ud544\uc694\ud558\ub2e4.<\/li>\n    <li><strong>\uc720\uccb4 \ube44\uc911 SG<\/strong>: \ubb34\uac70\uc6b4 \uc720\uccb4\uc77c\uc218\ub85d \uac19\uc740 \uc720\ub7c9\uc5d0 \ub354 \ud070 C<sub>v<\/sub>\uac00 \ud544\uc694\ud558\ub2e4.<\/li>\n    <li><strong>\uc555\ub825\uac15\ud558 \u0394P<\/strong>: \ubc38\ube0c\ub97c \ud1b5\uacfc\uc2dc\ud0a4\ub294 \uad6c\ub3d9 \uc5d0\ub108\uc9c0\uc774\uba70, \ud074\uc218\ub85d \uac19\uc740 \uc720\ub7c9\uc5d0 \ud544\uc694\ud55c C<sub>v<\/sub>\ub294 \uc791\uc544\uc9c4\ub2e4.<\/li>\n  <\/ol>\n\n  <div class=\"cv-cv-flow\">\uacf5\uc815\uc870\uac74 \uacb0\uc815 \u2192 \ud544\uc694 C<sub>v<\/sub> \uacc4\uc0b0 \u2192 \uc81c\uc870\uc0ac\ud45c \uc870\ud68c \u2192 \ubc38\ube0c \ud06c\uae30\u00b7\ud2b8\ub9bc\u00b7\uac1c\ub3c4 \uc120\uc815<\/div>\n\n  <h2 id=\"cv-cv-formula\">\uc561\uccb4\uc758 \ud575\uc2ec \uc218\uc2dd<\/h2>\n  <p>US \ub2e8\uc704\uacc4\uc5d0\uc11c \uc561\uccb4\uc758 \uae30\ubcf8 \uad00\uacc4\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n  <div class=\"cv-cv-eq\">Q = C<sub>v<\/sub>\u221a(\u0394P \/ SG)<\/div>\n  <p>\ud544\uc694\ud55c C<sub>v<\/sub>\ub97c \uad6c\ud558\ub3c4\ub85d \uc815\ub9ac\ud558\uba74 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n  <div class=\"cv-cv-eq\">C<sub>v<\/sub> = Q\u221a(SG \/ \u0394P)<\/div>\n  <div class=\"cv-cv-eq\">\u0394P = P<sub>1<\/sub> \u2212 P<sub>2<\/sub><\/div>\n\n  <div class=\"cv-cv-table-wrap\">\n    <table style=\"min-width:620px\">\n      <thead><tr><th>\uae30\ud638<\/th><th>\uc758\ubbf8<\/th><th>\ub300\ud45c \ub2e8\uc704<\/th><\/tr><\/thead>\n      <tbody>\n        <tr><td>Q<\/td><td>\ubc38\ube0c\ub97c \ud1b5\uacfc\ud574\uc57c \ud558\ub294 \uc561\uccb4 \uccb4\uc801\uc720\ub7c9<\/td><td>gpm<\/td><\/tr>\n        <tr><td>SG<\/td><td>\uc6b4\uc804\uc628\ub3c4\uc5d0\uc11c \uc561\uccb4\uc758 \ube44\uc911, \ubb3c \uae30\uc900<\/td><td>\u2014<\/td><\/tr>\n        <tr><td>P<sub>1<\/sub><\/td><td>\ubc38\ube0c \uc785\uad6c \uc555\ub825<\/td><td>psi<\/td><\/tr>\n        <tr><td>P<sub>2<\/sub><\/td><td>\ubc38\ube0c \ucd9c\uad6c \uc555\ub825<\/td><td>psi<\/td><\/tr>\n        <tr><td>\u0394P<\/td><td>\ubc38\ube0c \uc804\ud6c4 \uc555\ub825\uac15\ud558, P<sub>1<\/sub> \u2212 P<sub>2<\/sub><\/td><td>psi<\/td><\/tr>\n        <tr><td>C<sub>v<\/sub><\/td><td>\uc694\uad6c \ub610\ub294 \uc815\uaca9 \ubc38\ube0c \uc720\ub7c9\uacc4\uc218<\/td><td>\uacc4\uc218<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n\n  <p>\ubcc0\uc218\uc758 \uad00\uacc4\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n  <div class=\"cv-cv-eq\">Q \u2191 \u21d2 C<sub>v<\/sub> \u2191, &nbsp;&nbsp; SG \u2191 \u21d2 C<sub>v<\/sub> \u2191, &nbsp;&nbsp; \u0394P \u2191 \u21d2 C<sub>v<\/sub> \u2193<\/div>\n\n  <h2 id=\"cv-cv-example\">\uae30\uc220\uc0ac \uacc4\uc0b0 \uc608\uc2dc<\/h2>\n  <p>130\ud68c 4\uad50\uc2dc 6\ubc88 \ubb38\uc81c\uc758 \uc870\uac74\uc744 \uc801\uc6a9\ud55c\ub2e4.<\/p>\n  <ul>\n    <li>\uacbd\uc720 \uc720\ub7c9: Q = 300 gpm<\/li>\n    <li>\ube44\uc911: SG = 0.9<\/li>\n    <li>\ubc38\ube0c \uc555\ub825\uac15\ud558: \u0394P = 90 psi<\/li>\n  <\/ul>\n\n  <div class=\"cv-cv-eq\">\n    <span class=\"line\">C<sub>v<\/sub> = 300\u221a(0.9 \/ 90)<\/span>\n    <span class=\"line\">= 300\u221a0.01<\/span>\n    <span class=\"line cv-cv-result\">= 30<\/span>\n  <\/div>\n\n  <p>\ubb38\uc81c\uc5d0\uc11c \uc81c\uc2dc\ub41c \ud45c\uc758 \uc77c\ubd80\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n  <div class=\"cv-cv-table-wrap\">\n    <table style=\"min-width:520px\">\n      <thead><tr><th>\ubc38\ube0c \ud06c\uae30<\/th><th>\uc81c\uc2dc C<sub>v<\/sub><\/th><th>\ud310\ub2e8<\/th><\/tr><\/thead>\n      <tbody>\n        <tr><td>1 inch<\/td><td>15<\/td><td>\uc6a9\ub7c9 \ubd80\uc871<\/td><\/tr>\n        <tr><td>1.5 inch<\/td><td>35<\/td><td>\ud544\uc694 C<sub>v<\/sub> = 30 \ucda9\uc871<\/td><\/tr>\n        <tr><td>2 inch<\/td><td>55<\/td><td>\uc6a9\ub7c9\uc740 \ucda9\uc871\ud558\ub098 \uacfc\ub300 \uac00\ub2a5<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n\n  <p>\ub530\ub77c\uc11c \ubb38\uc81c \uc870\uac74\uc5d0\uc11c\ub294 \ud544\uc694 C<sub>v<\/sub> = 30\uc744 \ucd08\uacfc\ud558\ub294 \ucd5c\uc18c \ud06c\uae30\uc778\n  <strong>1.5 inch, C<sub>v<\/sub> = 35 \ubc38\ube0c<\/strong>\ub97c \uc120\uc815\ud55c\ub2e4.<\/p>\n  <p>\ub2e4\ub9cc \uc774 \ud45c\ub294 \ubb38\uc81c\uc5d0\uc11c \uc8fc\uc5b4\uc9c4 \uac12\uc774\uba70, \uc2e4\uc81c \uc124\uacc4\uc5d0\uc11c\ub294 \uc81c\uc870\uc0ac\u00b7\ubaa8\ub378\u00b7\ud2b8\ub9bc\u00b7\uac1c\ub3c4\ubcc4 \uc81c\ud488\uc790\ub8cc\ub97c \uc0ac\uc6a9\ud55c\ub2e4.<\/p>\n\n  <h2 id=\"cv-cv-correction\">\uc2e4\uc81c \uc124\uacc4\uc5d0\uc11c\uc758 \ubcf4\uc815<\/h2>\n  <p>\uae30\uc220\uc0ac \ub2f5\uc548\uc5d0\uc11c\ub294 \uae30\ubcf8\uc2dd\uc744 \uc911\uc2ec\uc73c\ub85c \uc4f0\uace0, \uc2e4\uc81c \uc124\uacc4\uc5d0\uc11c\ub294 \ub2e4\uc74c \ubcf4\uc815\uc744 \ucd94\uac00\ud55c\ub2e4\uace0 \uc124\uba85\ud55c\ub2e4.<\/p>\n  <div class=\"cv-cv-eq\">C<sub>v<\/sub> = [Q \/ (N<sub>1<\/sub>F<sub>P<\/sub>)]\u221a(SG \/ \u0394P<sub>sizing<\/sub>)<\/div>\n\n  <div class=\"cv-cv-table-wrap\">\n    <table style=\"min-width:650px\">\n      <thead><tr><th>\ud56d\ubaa9<\/th><th>\uc758\ubbf8<\/th><\/tr><\/thead>\n      <tbody>\n        <tr><td>N<sub>1<\/sub><\/td><td>\uc720\ub7c9\u00b7\uc555\ub825 \ub2e8\uc704\uacc4\uc5d0 \ub530\ub978 \uc218\uce58\uc0c1\uc218. gpm\uacfc psi\ub97c \uc0ac\uc6a9\ud558\uba74 \uae30\ubcf8\uc2dd\uc5d0\uc11c\ub294 1\uc774\ub2e4.<\/td><\/tr>\n        <tr><td>F<sub>P<\/sub><\/td><td>\ubc38\ube0c\uc5d0 \uc9c1\uc811 \uc5f0\uacb0\ub41c \ub9ac\ub4c0\uc11c\u00b7\uc5d8\ubcf4\u00b7\ud2f0 \ub4f1\uc758 \uc555\ub825\uc190\uc2e4\uc744 \ubc18\uc601\ud558\ub294 \ubc30\uad00 \ud615\uc0c1\uacc4\uc218\uc774\ub2e4. \ubd80\uc18d\ud488 \uc601\ud5a5\uc774 \uc5c6\uc73c\uba74 1\uc774\ub2e4.<\/td><\/tr>\n        <tr><td>F<sub>L<\/sub><\/td><td>\uc561\uccb4 \uc555\ub825\ud68c\ubcf5\uacc4\uc218\uc774\ub2e4. \ubc38\ube0c \ud615\uc0c1\uacfc \uac1c\ub3c4\uc5d0 \ub530\ub77c \ub2ec\ub77c\uc9c0\uba70 \ub9c9\ud798\uc720\ub3d9\u00b7\uce90\ube44\ud14c\uc774\uc158 \ud310\ub2e8\uc5d0 \uc0ac\uc6a9\ud55c\ub2e4.<\/td><\/tr>\n        <tr><td>\u0394P<sub>sizing<\/sub><\/td><td>\uc2e4\uc81c \uc555\ub825\uac15\ud558\uc640 \ub9c9\ud798\uc720\ub3d9 \ud55c\uacc4 \uc911 \uc0ac\uc774\uc9d5\uc5d0 \uc0ac\uc6a9\ud560 \uc720\ud6a8 \uc555\ub825\uac15\ud558\uc774\ub2e4.<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n\n  <p>\uc555\ub825\uac15\ud558\uac00 \ucee4\uc838 \ubc38\ube0c \ub0b4\ubd80 \uc555\ub825\uc774 \uc99d\uae30\uc555\uae4c\uc9c0 \ub0ae\uc544\uc9c0\uba74 \ub9c9\ud798\uc720\ub3d9\uc774 \ubc1c\uc0dd\ud560 \uc218 \uc788\ub2e4.\n  \uc774 \uacbd\uc6b0 \uc2e4\uc81c \uc555\ub825\uac15\ud558 \uc804\uccb4\ub97c \uc0ac\uc6a9\ud558\uc9c0 \uc54a\uace0 \ub2e4\uc74c\uacfc \uac19\uc774 \uc81c\ud55c\ud55c\ub2e4.<\/p>\n  <div class=\"cv-cv-eq\">\u0394P<sub>sizing<\/sub> = min(\u0394P, \u0394P<sub>choked<\/sub>)<\/div>\n\n  <h2 id=\"cv-cv-iteration\">\ubc18\ubcf5 \uc0b0\uc815\uc758 \uc758\ubbf8<\/h2>\n  <p>\ucc98\uc74c\uc5d0\ub294 \ucd5c\uc885 \ubc38\ube0c\uc640 \uac1c\ub3c4\ub97c \ubaa8\ub974\ubbc0\ub85c \ud6c4\ubcf4 \ubc38\ube0c\uc758 C<sub>v<\/sub>\uc640 F<sub>L<\/sub>\uc744 \uac00\uc815\ud55c\ub2e4.\n  \uacc4\uc0b0 \ud6c4 \ud544\uc694 C<sub>v<\/sub>\uc5d0 \ud574\ub2f9\ud558\ub294 \uc2e4\uc81c \uac1c\ub3c4\uc640 \uacc4\uc218\ub97c \ub2e4\uc2dc \uc870\ud68c\ud558\uc5ec \uc7ac\uacc4\uc0b0\ud55c\ub2e4.<\/p>\n\n  <div class=\"cv-cv-flow\">\n    \ud6c4\ubcf4 \ubc38\ube0c \uac00\uc815 \u2192 \uc81c\ud488\uc790\ub8cc\uc758 C<sub>v<\/sub>, F<sub>L<\/sub> \uc870\ud68c \u2192\n    F<sub>P<\/sub>\uc640 \ub9c9\ud798\uc720\ub3d9 \uac80\ud1a0 \u2192 \ud544\uc694 C<sub>v<\/sub> \uc7ac\uacc4\uc0b0 \u2192\n    \ud574\ub2f9 \uac1c\ub3c4\uc758 C<sub>v<\/sub>, F<sub>L<\/sub> \uc7ac\uc870\ud68c \u2192 \uacc4\uc0b0\uac12\uacfc \uc120\uc815\uac12\uc774 \uac00\uae4c\uc6b8 \ub54c \uc885\ub8cc\n  <\/div>\n\n  <p>C<sub>v<\/sub>\uc640 F<sub>L<\/sub>\uc740 \uac19\uc740 \ubc38\ube0c\uc640 \uac19\uc740 \uac1c\ub3c4\uc5d0 \ub300\uc751\ud558\ub294 \uc870\ud569\uc73c\ub85c \uc0ac\uc6a9\ud574\uc57c \ud55c\ub2e4.\n  \ubc38\ube0c \ud06c\uae30 \ub610\ub294 \uac1c\ub3c4\uac00 \ubc14\ub00c\uba74 \ub450 \uac12\uc744 \ud568\uaed8 \uac31\uc2e0\ud55c\ub2e4.<\/p>\n\n  <h2 id=\"cv-cv-errors\">\uacfc\uc18c\u00b7\uacfc\ub300 \uc120\uc815\uc758 \uc601\ud5a5<\/h2>\n  <div class=\"cv-cv-table-wrap\">\n    <table style=\"min-width:760px\">\n      <thead><tr><th>\uad6c\ubd84<\/th><th>\uc6d0\uc778 \ubc0f \uc6b4\uc804\uc0c1\ud0dc<\/th><th>\uc8fc\uc694 \ubd80\uc791\uc6a9<\/th><\/tr><\/thead>\n      <tbody>\n        <tr><td>\uacfc\uc18c \uc120\uc815<\/td><td>\uc815\uaca9 C<sub>v<\/sub>\uac00 \ud544\uc694 C<sub>v<\/sub>\ubcf4\ub2e4 \uc791\uc74c<\/td><td>\ucd5c\ub300 \uc720\ub7c9 \ubd80\uc871, \uc0c1\ub958\uc555\ub825 \uc0c1\uc2b9, \ud070 \uc555\ub825\uac15\ud558, \uce90\ube44\ud14c\uc774\uc158\u00b7\ud50c\ub798\uc2f1 \uc704\ud5d8 \uc99d\uac00<\/td><\/tr>\n        <tr><td>\uacfc\ub300 \uc120\uc815<\/td><td>\uc815\uaca9 C<sub>v<\/sub>\uac00 \ud544\uc694\uac12\ubcf4\ub2e4 \uc9c0\ub098\uce58\uac8c \ud07c<\/td><td>\ub0ae\uc740 \uac1c\ub3c4 \uc9d1\uc911, \ubc38\ube0c \uc774\ub4dd \uc99d\uac00, \ud5cc\ud305\u00b7\ubd88\uc548\uc815, \uc2dc\ud2b8 \ubd80\uadfc \uace0\uc720\uc18d, \ube44\uc6a9 \uc99d\uac00<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n\n  <p>\ub530\ub77c\uc11c \ucd5c\ub300 \uc720\ub7c9\ub9cc \ud1b5\uacfc\uc2dc\ud0a4\ub294 \ubc38\ube0c\uac00 \uc544\ub2c8\ub77c \ub2e4\uc74c \uc138 \uc6b4\uc804\uc810\uc744 \ud568\uaed8 \uac80\ud1a0\ud574\uc57c \ud55c\ub2e4.<\/p>\n  <ul>\n    <li><strong>\ucd5c\uc18c \uc720\ub7c9<\/strong>: \ub0ae\uc740 \uc720\ub7c9\uc744 \uc548\uc815\uc801\uc73c\ub85c \uc81c\uc5b4\ud560 \uc218 \uc788\ub294\uac00<\/li>\n    <li><strong>\uc815\uc0c1 \uc720\ub7c9<\/strong>: \uc801\uc815 \uac1c\ub3c4\uc5d0\uc11c \uc6b4\uc804\ud558\ub294\uac00<\/li>\n    <li><strong>\ucd5c\ub300 \uc720\ub7c9<\/strong>: \uc694\uad6c \ucd5c\ub300 \uc720\ub7c9\uc744 \ucda9\ubd84\ud788 \ud1b5\uacfc\uc2dc\ud0a4\ub294\uac00<\/li>\n  <\/ul>\n\n  <h2 id=\"cv-cv-conclusion\">\ub2f5\uc548\uc6a9 \uacb0\ub860<\/h2>\n  <div class=\"cv-cv-box cv-cv-key\">\n    <strong class=\"cv-cv-box-title\">\ud575\uc2ec<\/strong>\n    <p>C<sub>v<\/sub>\ub294 \ubc38\ube0c\uc758 \uc720\ub7c9 \ud1b5\uacfc \ub2a5\ub825\uc774\uba70, \uc561\uccb4\uc758 \uae30\ubcf8 \uc0b0\uc815\uc2dd\uc740 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n    <div class=\"cv-cv-eq\">C<sub>v<\/sub> = Q\u221a(SG \/ \u0394P)<\/div>\n    <p>\uacf5\uc815\uc870\uac74\uc73c\ub85c \ud544\uc694 C<sub>v<\/sub>\ub97c \uacc4\uc0b0\ud55c \ud6c4 \uc81c\uc870\uc0ac \uc790\ub8cc\uc5d0\uc11c \ubc38\ube0c \ud06c\uae30, \ud2b8\ub9bc \ubc0f \uac1c\ub3c4\ub97c \uc120\uc815\ud55c\ub2e4.<\/p>\n    <p>\uc2e4\uc81c \uc124\uacc4\uc5d0\uc11c\ub294 F<sub>P<\/sub>, F<sub>L<\/sub>, \ub9c9\ud798\uc720\ub3d9, \uce90\ube44\ud14c\uc774\uc158, \uc810\ub3c4\uc640 \ucd5c\uc18c\u00b7\uc815\uc0c1\u00b7\ucd5c\ub300 \uc6b4\uc804\uc870\uac74\uc744 \uac80\ud1a0\ud558\uace0,\n    \uc120\uc815 \uac1c\ub3c4\uc758 \uacc4\uc218\uc640 \uacc4\uc0b0\uac12\uc774 \uc77c\uce58\ud558\ub3c4\ub85d \ubc18\ubcf5\ud55c\ub2e4.<\/p>\n  <\/div>\n\n  <h2 id=\"cv-cv-references\">\ucc38\uace0\ubb38\ud5cc<\/h2>\n  <ol>\n    <li>Emerson, <em>Control Valve Handbook<\/em>, Sixth Edition, Chapter 5: Control Valve Sizing, 2023.<\/li>\n    <li>Phillip L. Skousen, <em>Valve Handbook<\/em>, Third Edition, McGraw-Hill, Chapters 2 and 7, 2004.<\/li>\n    <li>\uc774\ub300\uc6d0, \u201cvalve coefficient\u201d, now0930 \uc77c\uc9c0, 130\ud68c 4\uad50\uc2dc 6\ubc88 \ubb38\uc81c \ubc0f \uc791\uc131 \ub2f5\uc548,\n      <a class=\"cv-cv-link\" href=\"https:\/\/now0930.pe.kr\/wordpress\/valve-coefficient\/\" target=\"_blank\" rel=\"noopener noreferrer\">\uad00\ub828 \uae00 \ubcf4\uae30<\/a>.\n    <\/li>\n  <\/ol>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-now-0930 wp-block-embed-now-0930\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"8Hylc2AySD\"><a href=\"https:\/\/now0930.pe.kr\/wordpress\/valve-coefficient\/\">valve coefficient<\/a><\/blockquote><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"\u201cvalve coefficient\u201d \u2014 now0930 \uc77c\uc9c0\" src=\"https:\/\/now0930.pe.kr\/wordpress\/valve-coefficient\/embed\/#?secret=6bSBysUS3Z#?secret=8Hylc2AySD\" data-secret=\"8Hylc2AySD\" width=\"500\" height=\"282\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/08\/valve.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"valve\uc758 \uc0bd\uc785.\"><\/object><a id=\"wp-block-file--media-70deb97c-a311-4734-8ed0-e9be7950ebbf\" href=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/08\/valve.pdf\">valve<\/a><a href=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/08\/valve.pdf\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-70deb97c-a311-4734-8ed0-e9be7950ebbf\">\ub2e4\uc6b4\ub85c\ub4dc<\/a><\/div>\n\n\n\n<pre class=\"wp-block-code\"><code>{\n  \"schema_version\": \"1.0\",\n  \"topic_id\": \"control_valve_flow_coefficient_cv_liquid_sizing_selection\",\n  \"title_ko\": \"\uc81c\uc5b4\ubc38\ube0c \uc720\ub7c9\uacc4\uc218 Cv\uc640 \uc561\uccb4 \ubc38\ube0c \uc0b0\uc815\",\n  \"title_en\": \"Control Valve Flow Coefficient Cv and Liquid Valve Sizing\",\n  \"document_purpose\": \"\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4\uae30\uc220\uc0ac \ub2f5\uc548\uc6a9 \ud575\uc2ec \uc124\uba85\uacfc AI \uac80\uc0c9\u00b7\ud3c9\uac00\uc6a9 \uad6c\uc870\ud654 \ub370\uc774\ud130\",\n  \"scope\": {\n    \"included\": &#91;\n      \"Cv \uc815\uc758\uc640 \ubb3c\ub9ac\uc801 \uc758\ubbf8\",\n      \"\uc561\uccb4 \uae30\ubcf8 \uc0ac\uc774\uc9d5\uc2dd\",\n      \"\ubcc0\uc218\uc640 \ub2e8\uc704 \uc124\uba85\",\n      \"\uae30\uc220\uc0ac \uacc4\uc0b0 \uc608\uc2dc\",\n      \"\uc81c\uc870\uc0ac Cv \ud45c\ub97c \uc774\uc6a9\ud55c \ubc38\ube0c \uc120\uc815\",\n      \"FP, FL, choked flow\uc758 \ucd5c\uc18c \ubcf4\uc815 \uac1c\ub150\",\n      \"\uc120\uc815\uac12\uacfc \uacc4\uc0b0\uac12\uc758 \ubc18\ubcf5 \uc0b0\uc815\",\n      \"\uacfc\uc18c\u00b7\uacfc\ub300 \uc120\uc815 \ubd80\uc791\uc6a9\",\n      \"\ucd5c\uc18c\u00b7\uc815\uc0c1\u00b7\ucd5c\ub300 \uc6b4\uc804\uc810 \uac80\ud1a0\"\n    ],\n    \"excluded_or_simplified\": &#91;\n      \"\uae30\uccb4\u00b7\uc99d\uae30 \uc0c1\uc138 \uc0ac\uc774\uc9d5\uc2dd\",\n      \"\uc810\uc131 \uc720\ub3d9 Reynolds \ubcf4\uc815\uc2dd\uc758 \uc0c1\uc138 \uc804\uac1c\",\n      \"\ubc30\uad00 \ud615\uc0c1\uacc4\uc218 FP\uc758 \uc0c1\uc138 \uc190\uc2e4\uacc4\uc218 \uacc4\uc0b0\",\n      \"\uc561\uccb4 \ub9c9\ud798\uc720\ub3d9 \ud55c\uacc4\uc2dd\uc758 \uc804\uccb4 \uc804\uac1c\",\n      \"\ud2b9\uc815 \uc81c\uc870\uc0ac \uc81c\ud488\uc758 \uc0c1\uc138 \uc120\uc815\"\n    ]\n  },\n  \"core_definition\": {\n    \"term\": \"Cv\",\n    \"aliases\": &#91;\n      \"valve coefficient\",\n      \"flow coefficient\",\n      \"\ubc38\ube0c \uc720\ub7c9\uacc4\uc218\",\n      \"\uc720\ub7c9\uacc4\uc218\"\n    ],\n    \"definition_ko\": \"60\u00b0F\uc758 \ubb3c\uc774 \ubc38\ube0c \uc804\ud6c4 \uc555\ub825\ucc28 1 psi\uc5d0\uc11c 1\ubd84 \ub3d9\uc548 \ud1b5\uacfc\ud558\ub294 US gallon \uc218\ub85c \uc815\uc758\ub418\ub294 \ubc38\ube0c \uc720\ub7c9\ub2a5\ub825 \uacc4\uc218\",\n    \"interpretation\": \"Cv\uac00 \ud074\uc218\ub85d \ub3d9\uc77c\ud55c \uc555\ub825\uac15\ud558\uc5d0\uc11c \ub354 \ub9ce\uc740 \uc720\ub7c9\uc744 \ud1b5\uacfc\uc2dc\ud0a8\ub2e4.\",\n    \"not_equal_to\": &#91;\n      \"\ubc38\ube0c \ud638\uce6d \ud06c\uae30\",\n      \"\ubc38\ube0c \uac1c\ub3c4\uc728\",\n      \"\ubc30\uad00 \uc9c1\uacbd\",\n      \"\ubb34\uc870\uac74\uc801\uc778 \ucd5c\ub300 \uc720\ub7c9\"\n    ]\n  },\n  \"equations\": &#91;\n    {\n      \"id\": \"liquid_flow_basic\",\n      \"latex\": \"Q=C_v\\\\sqrt{\\\\frac{\\\\Delta P}{SG}}\",\n      \"meaning\": \"\ube44\uc555\ucd95\uc131 \uc561\uccb4\uc758 \uae30\ubcf8 \uc720\ub7c9 \uad00\uacc4\",\n      \"conditions\": &#91;\n        \"US \ub2e8\uc704\uacc4\",\n        \"Q\ub294 gpm\",\n        \"\uc555\ub825\uc740 psi\",\n        \"\uc815\uc0c1 \ub09c\ub958 \uc720\ub3d9\",\n        \"\ub9c9\ud798\uc720\ub3d9\uacfc \uc9c1\uc811 \uc5f0\uacb0 \ubd80\uc18d\ud488\uc758 \uc601\ud5a5\uc774 \ubb34\uc2dc \uac00\ub2a5\ud55c \uacbd\uc6b0\"\n      ]\n    },\n    {\n      \"id\": \"required_cv_basic\",\n      \"latex\": \"C_v=Q\\\\sqrt{\\\\frac{SG}{\\\\Delta P}}\",\n      \"meaning\": \"\uacf5\uc815\uc870\uac74\uc5d0\uc11c \ud544\uc694\ud55c Cv \uacc4\uc0b0\uc2dd\"\n    },\n    {\n      \"id\": \"pressure_drop\",\n      \"latex\": \"\\\\Delta P=P_1-P_2\",\n      \"meaning\": \"\ubc38\ube0c \uc804\ud6c4 \uc2e4\uc81c \uc555\ub825\uac15\ud558\"\n    },\n    {\n      \"id\": \"required_cv_corrected\",\n      \"latex\": \"C_v=\\\\frac{Q}{N_1F_P}\\\\sqrt{\\\\frac{SG}{\\\\Delta P_{sizing}}}\",\n      \"meaning\": \"\ubc30\uad00 \ubd80\uc18d\ud488\uacfc \uc720\ud6a8 \uc555\ub825\uac15\ud558\ub97c \ubc18\uc601\ud55c \uc561\uccb4 Cv \uc2dd\"\n    },\n    {\n      \"id\": \"sizing_pressure_drop\",\n      \"latex\": \"\\\\Delta P_{sizing}=\\\\min(\\\\Delta P,\\\\Delta P_{choked})\",\n      \"meaning\": \"\uc2e4\uc81c \uc555\ub825\uac15\ud558\uc640 \ub9c9\ud798\uc720\ub3d9 \ud55c\uacc4 \uc911 \uc791\uc740 \uac12\uc744 \uc0ac\uc774\uc9d5\uc5d0 \uc0ac\uc6a9\"\n    }\n  ],\n  \"variables\": {\n    \"Q\": {\n      \"name_ko\": \"\uc694\uad6c \uc561\uccb4 \uccb4\uc801\uc720\ub7c9\",\n      \"typical_unit\": \"gpm\",\n      \"effect_on_cv\": \"Q\uac00 \uc99d\uac00\ud558\uba74 \ud544\uc694\ud55c Cv\uac00 \ube44\ub840\ud558\uc5ec \uc99d\uac00\ud55c\ub2e4.\"\n    },\n    \"SG\": {\n      \"name_ko\": \"\uc6b4\uc804\uc628\ub3c4\uc5d0\uc11c\uc758 \uc561\uccb4 \ube44\uc911\",\n      \"typical_unit\": \"dimensionless\",\n      \"effect_on_cv\": \"SG\uac00 \uc99d\uac00\ud558\uba74 \ud544\uc694\ud55c Cv\uac00 \uc81c\uacf1\uadfc \ube44\uc728\ub85c \uc99d\uac00\ud55c\ub2e4.\"\n    },\n    \"P1\": {\n      \"name_ko\": \"\ubc38\ube0c \uc785\uad6c \uc555\ub825\",\n      \"typical_unit\": \"psi\"\n    },\n    \"P2\": {\n      \"name_ko\": \"\ubc38\ube0c \ucd9c\uad6c \uc555\ub825\",\n      \"typical_unit\": \"psi\"\n    },\n    \"delta_P\": {\n      \"name_ko\": \"\ubc38\ube0c \uc804\ud6c4 \uc555\ub825\uac15\ud558\",\n      \"typical_unit\": \"psi\",\n      \"effect_on_cv\": \"\uc555\ub825\uac15\ud558\uac00 \uc99d\uac00\ud558\uba74 \ub3d9\uc77c \uc720\ub7c9\uc5d0 \ud544\uc694\ud55c Cv\ub294 \uac10\uc18c\ud55c\ub2e4.\"\n    },\n    \"N1\": {\n      \"name_ko\": \"\ub2e8\uc704\uacc4 \uc218\uce58\uc0c1\uc218\",\n      \"note\": \"Q\ub97c gpm, \uc555\ub825\uc744 psi\ub85c \uc0ac\uc6a9\ud558\ub294 \uae30\ubcf8\uc2dd\uc5d0\uc11c\ub294 1\"\n    },\n    \"FP\": {\n      \"name_ko\": \"\ubc30\uad00 \ud615\uc0c1\uacc4\uc218\",\n      \"meaning\": \"\ubc38\ube0c\uc5d0 \uc9c1\uc811 \uc5f0\uacb0\ub41c \ub9ac\ub4c0\uc11c, \uc5d8\ubcf4, \ud2f0 \ub4f1\uc758 \uc555\ub825\uc190\uc2e4 \ubcf4\uc815\",\n      \"default_without_attached_fittings\": 1.0\n    },\n    \"FL\": {\n      \"name_ko\": \"\uc561\uccb4 \uc555\ub825\ud68c\ubcf5\uacc4\uc218\",\n      \"meaning\": \"\ubc38\ube0c \ub0b4\ubd80 \uc555\ub825\ud68c\ubcf5\uacfc \ub9c9\ud798\uc720\ub3d9\u00b7\uce90\ube44\ud14c\uc774\uc158 \ud2b9\uc131\",\n      \"source\": \"\uc81c\uc870\uc0ac \uc81c\ud488\uc790\ub8cc \ub610\ub294 \uc2dc\ud5d8\uc790\ub8cc\",\n      \"matching_rule\": \"Cv\uc640 \ub3d9\uc77c \ubc38\ube0c \ubc0f \ub3d9\uc77c \uac1c\ub3c4\uc5d0 \ub300\uc751\ud558\ub294 FL\uc744 \uc0ac\uc6a9\ud55c\ub2e4.\"\n    }\n  },\n  \"sizing_story\": &#91;\n    {\n      \"step\": 1,\n      \"action\": \"\uacf5\uc815\uc870\uac74\uc744 \uc815\ud55c\ub2e4.\",\n      \"inputs\": &#91;\"Q\", \"P1\", \"P2\", \"SG\"],\n      \"reason\": \"\ud544\uc694 \uc720\ub7c9\uacfc \uc0ac\uc6a9 \uac00\ub2a5\ud55c \ubc38\ube0c \uc555\ub825\uac15\ud558\ub97c \ud655\uc815\ud55c\ub2e4.\"\n    },\n    {\n      \"step\": 2,\n      \"action\": \"\uc555\ub825\uac15\ud558\ub97c \uacc4\uc0b0\ud55c\ub2e4.\",\n      \"equation_id\": \"pressure_drop\"\n    },\n    {\n      \"step\": 3,\n      \"action\": \"\ud544\uc694 Cv\ub97c \uacc4\uc0b0\ud55c\ub2e4.\",\n      \"equation_id\": \"required_cv_basic\"\n    },\n    {\n      \"step\": 4,\n      \"action\": \"\uc81c\uc870\uc0ac Cv \ud45c\uc5d0\uc11c \ud6c4\ubcf4 \ubc38\ube0c, \ud2b8\ub9bc \ubc0f \uac1c\ub3c4\ub97c \uc120\uc815\ud55c\ub2e4.\",\n      \"selection_rule\": \"\ud544\uc694 Cv\ub97c \uc801\uc815 \uac1c\ub3c4\uc5d0\uc11c \uc81c\uacf5\ud558\ub294 \uc81c\ud488\uc744 \uc120\ud0dd\ud55c\ub2e4.\"\n    },\n    {\n      \"step\": 5,\n      \"action\": \"FP, FL, \ub9c9\ud798\uc720\ub3d9 \ubc0f \uce90\ube44\ud14c\uc774\uc158\uc744 \uac80\ud1a0\ud55c\ub2e4.\"\n    },\n    {\n      \"step\": 6,\n      \"action\": \"\uc120\uc815 \uac1c\ub3c4\uc758 Cv\uc640 FL\ub85c \ub2e4\uc2dc \uacc4\uc0b0\ud55c\ub2e4.\",\n      \"termination_rule\": \"\uacc4\uc0b0\ub41c \ud544\uc694 Cv\uc640 \ubc18\ubcf5\uc5d0 \uc0ac\uc6a9\ud55c Cv\uac00 \ucda9\ubd84\ud788 \uac00\uae4c\uc6b0\uba74 \uc885\ub8cc\ud55c\ub2e4.\"\n    },\n    {\n      \"step\": 7,\n      \"action\": \"\ucd5c\uc18c, \uc815\uc0c1, \ucd5c\ub300 \uc720\ub7c9\uc870\uac74\uc5d0\uc11c \uc81c\uc5b4\uc131\uacfc \uc6a9\ub7c9\uc744 \uac80\uc99d\ud55c\ub2e4.\"\n    }\n  ],\n  \"worked_example\": {\n    \"source_context\": \"130\ud68c \uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4\uae30\uc220\uc0ac 4\uad50\uc2dc 6\ubc88\",\n    \"inputs\": {\n      \"Q_gpm\": 300,\n      \"SG\": 0.9,\n      \"delta_P_psi\": 90\n    },\n    \"calculation\": \"Cv = 300 * sqrt(0.9 \/ 90) = 30\",\n    \"required_cv\": 30,\n    \"problem_table_excerpt\": &#91;\n      {\"valve_size_inch\": 1.0, \"rated_cv\": 15, \"judgment\": \"insufficient\"},\n      {\"valve_size_inch\": 1.5, \"rated_cv\": 35, \"judgment\": \"selected\"},\n      {\"valve_size_inch\": 2.0, \"rated_cv\": 55, \"judgment\": \"capacity sufficient but potentially oversized\"}\n    ],\n    \"selected_valve_size_inch\": 1.5,\n    \"selection_reason\": \"\ubb38\uc81c\uc5d0\uc11c \uc81c\uc2dc\ud55c \ud45c\uc5d0\uc11c \ud544\uc694 Cv 30\uc744 \ucd08\uacfc\ud558\ub294 \ucd5c\uc18c \uc815\uaca9 Cv\uac00 35\uc774\uae30 \ub54c\ubb38\",\n    \"limitation\": \"\ubb38\uc81c \uc81c\uc2dc \ud45c\uc758 \uac12\uc774\uba70 \ubaa8\ub4e0 1.5 inch \ubc38\ube0c\uc758 \ubcf4\ud3b8\uc801 Cv\uac00 \uc544\ub2c8\ub2e4.\"\n  },\n  \"iteration\": {\n    \"required\": true,\n    \"why\": \"FP\uc640 FL\uc740 \ubc38\ube0c \ud06c\uae30, \ud2b8\ub9bc, Cv \ubc0f \uac1c\ub3c4\uc5d0 \uc601\ud5a5\uc744 \ubc1b\uc73c\uba70 \uacc4\uc0b0\ub41c Cv\uc5d0 \ub530\ub77c \ud6c4\ubcf4 \uac1c\ub3c4\uac00 \ubc14\ub014 \uc218 \uc788\uae30 \ub54c\ubb38\",\n    \"loop\": &#91;\n      \"\ud6c4\ubcf4 \ubc38\ube0c \ud06c\uae30\uc640 \uac1c\ub3c4 \uac00\uc815\",\n      \"\uc81c\ud488\uc790\ub8cc\uc5d0\uc11c \ub300\uc751 Cv\uc640 FL \uc870\ud68c\",\n      \"FP\uc640 choked flow \uac80\ud1a0\",\n      \"\ud544\uc694 Cv \uacc4\uc0b0\",\n      \"\uacc4\uc0b0 Cv\uc5d0 \ub300\uc751\ud558\ub294 \uc0c8 \uac1c\ub3c4 \ud655\uc778\",\n      \"\uc0c8 \uac1c\ub3c4\uc758 Cv\uc640 FL\ub85c \uc7ac\uacc4\uc0b0\"\n    ],\n    \"convergence_condition\": \"\uc0c8 \uacc4\uc0b0 Cv\uc640 \uc774\uc804 \ubc18\ubcf5\uc5d0 \uc0ac\uc6a9\ud55c Cv\uac00 \ucda9\ubd84\ud788 \uac00\uae4c\uc6c0\",\n    \"matching_constraint\": \"Cv\uc640 FL\uc740 \ubc18\ub4dc\uc2dc \uac19\uc740 \ubc38\ube0c\uc640 \uac19\uc740 \uac1c\ub3c4\uc758 \uac12\uc774\uc5b4\uc57c \ud55c\ub2e4.\"\n  },\n  \"operating_points\": &#91;\n    {\n      \"name\": \"minimum_flow\",\n      \"purpose\": \"\ub0ae\uc740 \uc720\ub7c9\uc5d0\uc11c \uc548\uc815\uc801 \uc81c\uc5b4\uc640 rangeability \ud655\uc778\"\n    },\n    {\n      \"name\": \"normal_flow\",\n      \"purpose\": \"\uc815\uc0c1 \uc6b4\uc804\uc810\uc774 \uc801\uc815 \uac1c\ub3c4\uc5d0 \uc704\uce58\ud558\ub294\uc9c0 \ud655\uc778\"\n    },\n    {\n      \"name\": \"maximum_flow\",\n      \"purpose\": \"\ucd5c\ub300 \uc694\uad6c\uc720\ub7c9\uacfc \uc555\ub825\uc870\uac74 \ucda9\uc871 \ud655\uc778\"\n    }\n  ],\n  \"selection_errors\": {\n    \"undersized\": {\n      \"condition\": \"rated Cv &lt; required Cv\",\n      \"effects\": &#91;\n        \"\ucd5c\ub300 \uc720\ub7c9 \ubd80\uc871\",\n        \"\uc0c1\ub958 \uc555\ub825 \uc0c1\uc2b9\",\n        \"\ubc38\ube0c \uc555\ub825\uac15\ud558 \uc99d\uac00\",\n        \"\uce90\ube44\ud14c\uc774\uc158 \ub610\ub294 \ud50c\ub798\uc2f1 \uc704\ud5d8 \uc99d\uac00\",\n        \"\uc0dd\uc0b0\ub7c9 \uc81c\ud55c\"\n      ]\n    },\n    \"oversized\": {\n      \"condition\": \"rated Cv is excessively larger than required Cv\",\n      \"effects\": &#91;\n        \"\uc815\uc0c1 \uc6b4\uc804\uc774 \ub0ae\uc740 \uac1c\ub3c4\uc5d0 \uc9d1\uc911\",\n        \"\ubc38\ube0c \uc774\ub4dd \uc99d\uac00\",\n        \"\ud5cc\ud305\uacfc \uc81c\uc5b4 \ubd88\uc548\uc815\",\n        \"\uc2dc\ud2b8 \ubd80\uadfc \uace0\uc720\uc18d\uacfc \ud2b8\ub9bc \uc190\uc0c1 \uac00\ub2a5\",\n        \"\uad6c\ub9e4 \ubc0f \uc124\uce58\ube44 \uc99d\uac00\"\n      ]\n    }\n  },\n  \"accepted_claims\": &#91;\n    \"Cv\ub294 \ubc38\ube0c\uc758 \uc720\ub7c9 \ud1b5\uacfc \ub2a5\ub825\uc774\ub2e4.\",\n    \"\ud544\uc694 Cv\uc640 \uc815\uaca9 Cv\ub97c \uad6c\ubd84\ud574\uc57c \ud55c\ub2e4.\",\n    \"\ub3d9\uc77c NPS\ub77c\ub3c4 \ud2b8\ub9bc\uacfc \uac1c\ub3c4\uc5d0 \ub530\ub77c Cv\uac00 \ub2ec\ub77c\uc9c4\ub2e4.\",\n    \"\uc561\uccb4 \uae30\ubcf8\uc2dd\uc740 Cv = Q sqrt(SG \/ deltaP)\uc774\ub2e4.\",\n    \"\uc2e4\uc81c \uc120\uc815\uc740 \uc81c\uc870\uc0ac Cv \ubc0f FL \uc790\ub8cc\uc640 \uc6b4\uc804\ubc94\uc704\ub97c \ud568\uaed8 \uac80\ud1a0\ud55c\ub2e4.\",\n    \"Cv\uc640 FL\uc740 \uac19\uc740 \ubc38\ube0c \ubc0f \uac19\uc740 \uac1c\ub3c4\uc758 \ub300\uc751\uac12\uc744 \uc0ac\uc6a9\ud55c\ub2e4.\"\n  ],\n  \"rejected_claims\": &#91;\n    \"Cv\ub294 \ubc38\ube0c \uc9c1\uacbd\uc774\ub2e4.\",\n    \"1.5 inch \ubc38\ube0c\uc758 Cv\ub294 \ud56d\uc0c1 35\uc774\ub2e4.\",\n    \"\uac00\uc7a5 \ud070 \ubc38\ube0c\ub97c \uc120\ud0dd\ud560\uc218\ub85d \uc81c\uc5b4\uac00 \uc88b\uc544\uc9c4\ub2e4.\",\n    \"\uc555\ub825\uac15\ud558\ub97c \ubb34\ud55c\ud788 \ub192\uc774\uba74 \uc720\ub7c9\ub3c4 \ubb34\ud55c\ud788 \uc99d\uac00\ud55c\ub2e4.\",\n    \"\uc561\uccb4 \uae30\ubcf8\uc2dd\uc744 \uae30\uccb4\uc640 \uc99d\uae30\uc5d0 \uadf8\ub300\ub85c \uc801\uc6a9\ud560 \uc218 \uc788\ub2e4.\",\n    \"Cv\uc640 FL\uc740 \uc11c\ub85c \ub2e4\ub978 \uac1c\ub3c4\uc758 \uac12\uc744 \ud63c\ud569\ud574\ub3c4 \ub41c\ub2e4.\"\n  ],\n  \"exam_answer_outline\": &#91;\n    \"\uc815\uc758: Cv=1\uc758 \ud45c\uc900\uc870\uac74\uacfc \uc720\ub7c9\ub2a5\ub825 \uc124\uba85\",\n    \"\uae30\ubcf8\uc2dd: Cv = Q sqrt(SG \/ deltaP)\",\n    \"\ubcc0\uc218: Q, SG, P1, P2, deltaP \uc124\uba85\",\n    \"\uacc4\uc0b0: \uacf5\uc815\uc870\uac74\uc73c\ub85c \ud544\uc694 Cv \uc0b0\ucd9c\",\n    \"\uc120\uc815: \uc81c\uc870\uc0ac\ud45c\uc5d0\uc11c \ubc38\ube0c \ud06c\uae30, \ud2b8\ub9bc, \uac1c\ub3c4 \uc120\uc815\",\n    \"\ubcf4\uc815: FP, FL, choked flow, cavitation \uc5b8\uae09\",\n    \"\uac80\uc99d: \ucd5c\uc18c\u00b7\uc815\uc0c1\u00b7\ucd5c\ub300 \uc720\ub7c9\uacfc \uacfc\uc18c\u00b7\uacfc\ub300 \uc120\uc815 \ubb38\uc81c\",\n    \"\uacb0\ub860: \uc6a9\ub7c9\uacfc \uc81c\uc5b4\uc131\uc744 \ub3d9\uc2dc\uc5d0 \ub9cc\uc871\ud558\ub3c4\ub85d \ubc18\ubcf5 \uc120\uc815\"\n  ],\n  \"routing_keywords\": &#91;\n    \"Cv\",\n    \"valve coefficient\",\n    \"flow coefficient\",\n    \"control valve sizing\",\n    \"liquid valve sizing\",\n    \"specific gravity\",\n    \"pressure drop\",\n    \"FP\",\n    \"FL\",\n    \"choked flow\",\n    \"cavitation\",\n    \"oversizing\",\n    \"undersizing\"\n  ],\n  \"sources\": &#91;\n    {\n      \"type\": \"book\",\n      \"title\": \"Control Valve Handbook\",\n      \"edition\": \"Sixth Edition\",\n      \"publisher_or_author\": \"Emerson\",\n      \"relevant_sections\": &#91;\"Chapter 5\", \"5.8 Sizing Valves for Liquids\"]\n    },\n    {\n      \"type\": \"book\",\n      \"title\": \"Valve Handbook\",\n      \"edition\": \"Third Edition\",\n      \"author\": \"Phillip L. Skousen\",\n      \"relevant_sections\": &#91;\"2.1 Valve Coefficients\", \"7.3 Body Sizing of Liquid-Service Control Valves\"]\n    },\n    {\n      \"type\": \"web_page\",\n      \"title\": \"valve coefficient\",\n      \"url\": \"https:\/\/now0930.pe.kr\/wordpress\/valve-coefficient\/\",\n      \"relevant_content\": \"130\ud68c 4\uad50\uc2dc 6\ubc88 \ubb38\uc81c, \ubb38\uc81c \uc81c\uc2dc Cv \ud45c, \uc791\uc131 \ub2f5\uc548\"\n    }\n  ]\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\uc81c\uc5b4\ubc38\ube0c\uc758 \uc720\ub7c9\uacc4\uc218 Cv\uc640 \uc561\uccb4 \ubc38\ube0c \uc0ac\uc774\uc9d5\uc5d0 \ub300\ud55c \ub0b4\uc6a9\uc744 \uc124\uba85\ud569\ub2c8\ub2e4. Cv\ub294 \ud2b9\uc815 \uc555\ub825 \ucc28\uc5d0\uc11c \ubc38\ube0c\ub97c \ud1b5\uacfc\ud558\ub294 \uc561\uccb4\uc758 \uc720\ub7c9 \ub2a5\ub825\uc744 \ub098\ud0c0\ub0b4\uba70, \ub2e4\uc591\ud55c \uacc4\uc0b0\uc2dd, \ubcc0\uc218 \ubc0f \uc120\uc815 \ubc29\ubc95\uc744 \ud1b5\ud574 \ucd5c\uc801\uc758 \ubc38\ube0c\ub97c \uc120\ud0dd\ud558\ub294 \ubc29\ubc95\uc744 \ub2e4\ub8f9\ub2c8\ub2e4.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[1185],"tags":[1625],"class_list":["post-9315","post","type-post","status-publish","format-standard","hentry","category-1185","tag-valve-coefficient"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts\/9315","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/comments?post=9315"}],"version-history":[{"count":5,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts\/9315\/revisions"}],"predecessor-version":[{"id":9352,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts\/9315\/revisions\/9352"}],"wp:attachment":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/media?parent=9315"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/categories?post=9315"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/tags?post=9315"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}