{"id":9318,"date":"2026-08-04T17:19:57","date_gmt":"2026-08-04T08:19:57","guid":{"rendered":"https:\/\/now0930.pe.kr\/wordpress\/?p=9318"},"modified":"2026-08-05T23:56:04","modified_gmt":"2026-08-05T14:56:04","slug":"actuator%ea%b0%80-%ed%95%84%ec%9a%94%ed%95%9c-%ed%9e%98-control-valve-handbook-5-11","status":"publish","type":"post","link":"https:\/\/now0930.pe.kr\/wordpress\/actuator%ea%b0%80-%ed%95%84%ec%9a%94%ed%95%9c-%ed%9e%98-control-valve-handbook-5-11\/","title":{"rendered":"actuator\uac00 \ud544\uc694\ud55c \ud798 Control Valve handbook 5.11"},"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.cv511-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.cv511-wrap *{box-sizing:border-box}\n.cv511-wrap h1,.cv511-wrap h2,.cv511-wrap h3{color:#1c497a;line-height:1.35}\n.cv511-wrap h1{margin:0 0 8px;font-size:2.05rem;text-align:center}\n.cv511-wrap h2{margin:46px 0 18px;padding-bottom:8px;border-bottom:2px solid #1c497a;font-size:1.5rem}\n.cv511-wrap h3{margin:28px 0 10px;font-size:1.18rem}\n.cv511-wrap p{margin:10px 0}\n.cv511-meta{margin:0 0 30px;color:#5b6470;text-align:center}\n.cv511-toc{margin:24px 0 34px;padding:18px 24px;background:#f8fafc;border:1px solid #dbe3ec;border-radius:8px}\n.cv511-toc ol{margin:8px 0 0;padding-left:1.3rem;columns:2;column-gap:30px}\n.cv511-toc li{break-inside:avoid;margin:4px 0}\n.cv511-toc a{color:#1c497a;text-decoration:none}\n.cv511-box{margin:20px 0;padding:18px 20px;border:1px solid;border-radius:8px}\n.cv511-box-title{display:block;margin-bottom:8px}\n.cv511-key{background:#ebf3fb;border-color:#1c497a}\n.cv511-note{background:#fff9e0;border-color:#b7791f}\n.cv511-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:1.05rem;text-align:center}\n.cv511-eq .line{display:block;margin:4px 0}\n.cv511-table-wrap{width:100%;margin:18px 0 26px;overflow-x:auto}\n.cv511-wrap table{width:100%;min-width:680px;border-collapse:collapse;font-size:.94rem}\n.cv511-wrap th,.cv511-wrap td{padding:10px 12px;border:1px solid #cbd5e1;vertical-align:top;text-align:left}\n.cv511-wrap th{background:#ebf3fb;color:#163b61}\n.cv511-wrap ul,.cv511-wrap ol{padding-left:1.45rem}\n.cv511-wrap li{margin:5px 0}\n.cv511-code{display:inline-block;padding:4px 8px;border:1px solid #cbd5e1;border-radius:5px;background:#f8fafc;font-family:Consolas,monospace}\n.cv511-pair{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:20px 0}\n.cv511-card{padding:16px;border:1px solid #cbd5e1;border-radius:8px;background:#fff}\n.cv511-card h4{margin:0 0 10px;color:#1c497a;font-size:1.05rem}\n@media(max-width:760px){\n  .cv511-wrap{font-size:16px}\n  .cv511-wrap h1{font-size:1.65rem}\n  .cv511-toc ol{columns:1}\n  .cv511-pair{grid-template-columns:1fr}\n}\n<\/style>\n\n<div class=\"cv511-wrap\">\n  <h1>Control Valve Handbook 5.11<br>\uae00\ub85c\ube0c\ubc38\ube0c \uc561\ucd94\uc5d0\uc774\ud130 \uc0ac\uc774\uc9d5<\/h1>\n  <p class=\"cv511-meta\">\ubc38\ube0c \uce21 \uc694\uad6c \ucd94\ub825\uacfc \uc561\ucd94\uc5d0\uc774\ud130 \uce21 \uac00\uc6a9 \ucd94\ub825\uc758 \ubd84\ub9ac \uacc4\uc0b0<\/p>\n\n  <nav class=\"cv511-toc\" aria-label=\"\ubaa9\ucc28\">\n    <strong>\ubaa9\ucc28<\/strong>\n    <ol>\n      <li><a href=\"#cv511-overview\">\uac1c\uc694<\/a><\/li>\n      <li><a href=\"#cv511-valve-force\">\ubc38\ube0c \uce21 \uc694\uad6c \ud798<\/a><\/li>\n      <li><a href=\"#cv511-unbalance\">A: \ubd88\ud3c9\ud615\ub825<\/a><\/li>\n      <li><a href=\"#cv511-seat\">B: \uc2dc\ud2b8 \ud558\uc911<\/a><\/li>\n      <li><a href=\"#cv511-packing\">C: \ud328\ud0b9 \ub9c8\ucc30\ub825<\/a><\/li>\n      <li><a href=\"#cv511-additional\">D: \ucd94\uac00 \ud798<\/a><\/li>\n      <li><a href=\"#cv511-actuator\">\uc561\ucd94\uc5d0\uc774\ud130 \uce21 \ud798<\/a><\/li>\n      <li><a href=\"#cv511-ato\">Air-to-Open, Spring-to-Close<\/a><\/li>\n      <li><a href=\"#cv511-atc\">Air-to-Close, Spring-to-Open<\/a><\/li>\n      <li><a href=\"#cv511-bench\">Bench Set\uacfc \uc2a4\ud504\ub9c1 \ud798<\/a><\/li>\n      <li><a href=\"#cv511-openclose\">\uac1c\ubc29 \ubc0f \ud3d0\uc1c4 \uc694\uad6c \ucd94\ub825<\/a><\/li>\n      <li><a href=\"#cv511-travel\">\uac1c\ub3c4\uc5d0 \ub530\ub978 \ud798\uc758 \ubcc0\ud654<\/a><\/li>\n      <li><a href=\"#cv511-selection\">\ucd5c\uc885 \uc561\ucd94\uc5d0\uc774\ud130 \uc120\uc815 \uc870\uac74<\/a><\/li>\n      <li><a href=\"#cv511-conclusion\">\uacb0\ub860<\/a><\/li>\n    <\/ol>\n  <\/nav>\n<h2 id=\"cv511-overview\">\uac1c\uc694<\/h2>\n<p>\uc561\ucd94\uc5d0\uc774\ud130 \uc0ac\uc774\uc9d5\uc740 \ubc38\ube0c\ub97c \uc791\ub3d9\uc2dc\ud0a4\ub294 \ub370 \ud544\uc694\ud55c \ud798\uacfc \uc561\ucd94\uc5d0\uc774\ud130\uac00 \uc2e4\uc81c\ub85c \uacf5\uae09\ud560 \uc218 \uc788\ub294 \ud798\uc744 \ube44\uad50\ud558\ub294 \uacfc\uc815\uc774\ub2e4.<\/p>\n<p>\uae00\ub85c\ube0c\ubc38\ube0c\ub294 \ucd95 \ubc29\ud5a5\uc758 <strong>\ucd94\ub825(Thrust)<\/strong>\uc744 \uae30\uc900\uc73c\ub85c \uc120\uc815\ud55c\ub2e4. \ud68c\uc804\uc2dd \ubc38\ube0c\ub294 \ucd95 \ud1a0\ud06c\ub97c \uae30\uc900\uc73c\ub85c \uc120\uc815\ud55c\ub2e4.<\/p>\n<div class=\"cv511-box cv511-key\"><strong class=\"cv511-box-title\">\ud575\uc2ec<\/strong><div class=\"cv511-eq\">F<sub>actuator,available<\/sub>(x) \u2265 F<sub>valve,required<\/sub>(x)<\/div><p>\uc704 \uc870\uac74\uc744 \uac1c\ubc29, \ud3d0\uc1c4, \uc804 \uc2a4\ud2b8\ub85c\ud06c \ubc0f Fail-Safe \uc870\uac74\uc5d0\uc11c \ubaa8\ub450 \ub9cc\uc871\ud574\uc57c \ud55c\ub2e4.<\/p><\/div>\n<p>\uc5ec\uae30\uc11c \uc911\uc694\ud55c \uc810\uc740 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n<ul><li>\ubc38\ube0c \uce21\uc5d0\ub294 \uacf5\uc815\uc555\ub825, \uc2dc\ud2b8, \ud328\ud0b9 \ubc0f \ud2b9\uc218 \uad6c\uc870\uc5d0 \uc758\ud55c \ud798\uc774 \uc788\ub2e4.<\/li><li>\uc561\ucd94\uc5d0\uc774\ud130 \uce21\uc5d0\ub294 \uacf5\uc555\ub825\uacfc \uc2a4\ud504\ub9c1\ub825\uc774 \uc788\ub2e4.<\/li><li>\uc2a4\ud504\ub9c1\ub825\uc740 \ubc38\ube0c \uce21\uc758 A, B, C, D\uc5d0 \ud3ec\ud568\ud558\uc9c0 \uc54a\ub294\ub2e4.<\/li><li>\uc2a4\ud504\ub9c1\ub825\uc740 \uc561\ucd94\uc5d0\uc774\ud130\uc758 \uc21c \uac00\uc6a9 \ucd94\ub825\uc744 \uacc4\uc0b0\ud560 \ub54c \ubc18\uc601\ud55c\ub2e4.<\/li><\/ul>\n<h2 id=\"cv511-valve-force\">\ubc38\ube0c \uce21 \uc694\uad6c \ud798<\/h2>\n<p>Control Valve Handbook 5.11\uc740 \uae00\ub85c\ube0c\ubc38\ube0c\uc758 \uc694\uad6c \ud798\uc744 \ub2e4\uc74c \ub124 \ud56d\ubaa9\uc73c\ub85c \uad6c\ubd84\ud55c\ub2e4.<\/p>\n<div class=\"cv511-eq\">F<sub>valve,required<\/sub> = F<sub>unbalance<\/sub> + F<sub>seat<\/sub> + F<sub>packing<\/sub> + F<sub>additional<\/sub><\/div>\n<div class=\"cv511-table-wrap\"><table><thead><tr><th>\uad6c\ubd84<\/th><th>\uba85\uce6d<\/th><th>\uc758\ubbf8<\/th><\/tr><\/thead><tbody><tr><td>A<\/td><td>Unbalance Force<\/td><td>\uacf5\uc815\uc555\ub825\uc774 \ud50c\ub7ec\uadf8\uc5d0 \uac00\ud558\ub294 \uc21c \ubd88\ud3c9\ud615\ub825<\/td><\/tr><tr><td>B<\/td><td>Force to Provide Seat Load<\/td><td>\uc694\uad6c \ub204\uc124\ub4f1\uae09\uc744 \ud655\ubcf4\ud558\uae30 \uc704\ud574 \ucd5c\uc885\uc801\uc73c\ub85c \ud615\uc131\ud574\uc57c \ud558\ub294 \uc2dc\ud2b8 \uc555\ucc29\ub825<\/td><\/tr><tr><td>C<\/td><td>Packing Friction<\/td><td>\ubc38\ube0c \uc2a4\ud15c\uc758 \uc774\ub3d9\uc744 \ubc29\ud574\ud558\ub294 \ud328\ud0b9\uc758 \uc815\uc9c0 \ubc0f \uc6b4\ub3d9 \ub9c8\ucc30\ub825<\/td><\/tr><tr><td>D<\/td><td>Additional Forces<\/td><td>\ubca8\ub85c\uc988 \uac15\uc131, \ud2b9\uc218 \uc530 \ub9c8\ucc30 \ubc0f \ube44\ud45c\uc900 \uad6c\uc870\uc5d0\uc11c \ubc1c\uc0dd\ud558\ub294 \ucd94\uac00 \ud798<\/td><\/tr><\/tbody><\/table><\/div>\n<p>A, B, C, D\ub294 \ud798\uc758 \ubc1c\uc0dd \uc6d0\uc778\uacfc \uc131\uaca9\uc774 \uc11c\ub85c \ub2e4\ub974\ub2e4.<\/p>\n<ul><li>A, C, D\ub294 \uc791\ub3d9 \ubc29\ud5a5\uc5d0 \ub530\ub77c \uc561\ucd94\uc5d0\uc774\ud130\ub97c \ubc29\ud574\ud558\uac70\ub098 \ub3c4\uc6b8 \uc218 \uc788\ub2e4.<\/li><li>B\ub294 \uadf9\ubcf5\ud574\uc57c \ud558\ub294 \uc678\ubd80 \uc800\ud56d\ub825\uc774 \uc544\ub2c8\ub77c \ucd5c\uc885\uc801\uc73c\ub85c \ud655\ubcf4\ud574\uc57c \ud558\ub294 \uc555\ucc29\ub825\uc774\ub2e4.<\/li><li>\ub124 \ud798\uc774 \uc804 \uc2a4\ud2b8\ub85c\ud06c\uc5d0\uc11c \ud56d\uc0c1 \ub3d9\uc2dc\uc5d0 \uac19\uc740 \ud06c\uae30\ub85c \uc791\uc6a9\ud558\ub294 \uac83\uc740 \uc544\ub2c8\ub2e4.<\/li><\/ul>\n<h2 id=\"cv511-unbalance\">A: \ubd88\ud3c9\ud615\ub825<\/h2>\n<p>\ubd88\ud3c9\ud615\ub825\uc740 \ud50c\ub7ec\uadf8 \uc591\uce21\uc758 \uc21c \uc555\ub825\ucc28\uac00 \uc21c \ubd88\ud3c9\ud615 \uba74\uc801\uc5d0 \uc791\uc6a9\ud558\uc5ec \ubc1c\uc0dd\ud55c\ub2e4.<\/p>\n<div class=\"cv511-eq\">F<sub>unbalance<\/sub> = \u0394P<sub>net<\/sub>A<sub>unbalance<\/sub><\/div>\n<ul><li>\u0394P<sub>net<\/sub>: \ud50c\ub7ec\uadf8 \uc591\uce21\uc758 \uc21c \uc555\ub825\ucc28<\/li><li>A<sub>unbalance<\/sub>: \ubc38\ube0c \uad6c\uc870\uc5d0 \ub530\ub978 \uc21c \ubd88\ud3c9\ud615 \uba74\uc801<\/li><\/ul>\n<p>\ubbf8\uad6d \ub2e8\uc704\uacc4\uc5d0\uc11c\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n<div class=\"cv511-eq\">F [lbf] = \u0394P [psi] \u00d7 A [in\u00b2]<\/div>\n<p>SI \ub2e8\uc704\uacc4\uc5d0\uc11c\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n<div class=\"cv511-eq\">F [N] = \u0394P [Pa] \u00d7 A [m\u00b2]<\/div>\n<p>\ud578\ub4dc\ubd81\uc758 \ub2e8\uc21c \uc0ac\uc774\uc9d5\uc5d0\uc11c\ub294 \uc8fc\ub85c \ucc28\ub2e8 \uc0c1\ud0dc\uc758 \uc555\ub825\ucc28\ub97c \uc0ac\uc6a9\ud55c\ub2e4. \ub2e4\ub9cc \uc2e4\uc81c \uc774\ub3d9 \uc911 \uc720\uccb4\ub825\uc740 \uac1c\ub3c4, \uc720\ub7c9, \ud2b8\ub9bc \ubc0f \uc720\ub3d9 \ubc29\ud5a5\uc5d0 \ub530\ub77c \ubcc0\ud560 \uc218 \uc788\ub2e4.<\/p>\n<p>\ubd88\ud3c9\ud615\ub825\uc774 \ud3d0\uc1c4\ub97c \ubc29\ud574\ud558\uba74 \ud3d0\uc1c4 \uc694\uad6c \ucd94\ub825\uc5d0 \ub354\ud558\uace0, \ud3d0\uc1c4\ub97c \ub3c4\uc6b0\uba74 \ube80\ub2e4.<\/p>\n<div class=\"cv511-eq\">F<sub>close<\/sub> = F<sub>seat<\/sub> + F<sub>packing<\/sub> + F<sub>additional<\/sub> \u00b1 F<sub>unbalance<\/sub><\/div>\n<h2 id=\"cv511-seat\">B: \uc2dc\ud2b8 \ud558\uc911<\/h2>\n<p>\uc2dc\ud2b8 \ud558\uc911\uc740 \uc2dc\ud2b8\uc758 \ubb34\uac8c\uac00 \uc544\ub2c8\ub2e4.<\/p>\n<div class=\"cv511-box cv511-key\"><strong class=\"cv511-box-title\">\ud575\uc2ec<\/strong><p>\uc2dc\ud2b8 \ud558\uc911\uc740 \ud50c\ub7ec\uadf8\ub97c \uc2dc\ud2b8\uc5d0 \uc555\ucc29\ud558\uc5ec \uc694\uad6c \ub204\uc124\ub4f1\uae09\uc744 \ud655\ubcf4\ud558\uae30 \uc704\ud574 \ucd5c\uc885\uc801\uc73c\ub85c \ub0a8\uaca8\uc57c \ud558\ub294 \uc811\ucd09\ub825\uc774\ub2e4.<\/p><\/div>\n<p>\uc6d0\ud615 \ud3ec\ud2b8\uc5d0\uc11c\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \uc0b0\uc815\ud560 \uc218 \uc788\ub2e4.<\/p>\n<div class=\"cv511-eq\">F<sub>seat<\/sub> = L<sub>seat<\/sub>C<sub>port<\/sub> = L<sub>seat<\/sub>\u03c0d<sub>port<\/sub><\/div>\n<ul><li>L<sub>seat<\/sub>: \ud3ec\ud2b8 \uc6d0\uc8fc \ub2e8\uc704 \uae38\uc774\ub2f9 \uc694\uad6c \uc2dc\ud2b8 \ud558\uc911<\/li><li>C<sub>port<\/sub>: \ud3ec\ud2b8 \uc6d0\uc8fc<\/li><li>d<sub>port<\/sub>: \ud3ec\ud2b8 \uc9c0\ub984<\/li><\/ul>\n<p>\ud50c\ub7ec\uadf8\uac00 \uc2dc\ud2b8\uc5d0\uc11c \ub5a8\uc5b4\uc838 \uc788\ub294 \ub3d9\uc548\uc5d0\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n<div class=\"cv511-eq\">F<sub>seat<\/sub> = 0<\/div>\n<p>\ud50c\ub7ec\uadf8\uac00 \uc2dc\ud2b8\uc5d0 \uc811\ucd09\ud55c \uc774\ud6c4 \uc561\ucd94\uc5d0\uc774\ud130 \ud798\uc774 \uacc4\uc18d \uc99d\uac00\ud558\uba74, \uc704\uce58\ub294 \uac70\uc758 \ubcc0\ud558\uc9c0 \uc54a\uace0 \ucd94\uac00 \ud798\uc774 \uc2dc\ud2b8 \ud558\uc911\uc73c\ub85c \uc804\ud658\ub41c\ub2e4.<\/p>\n<h2 id=\"cv511-packing\">C: \ud328\ud0b9 \ub9c8\ucc30\ub825<\/h2>\n<p>\ud328\ud0b9 \ub9c8\ucc30\ub825\uc740 \ub2e4\uc74c \uc694\uc18c\uc758 \uc601\ud5a5\uc744 \ubc1b\ub294\ub2e4.<\/p>\n<ul><li>\uc2a4\ud15c \uc9c0\ub984<\/li><li>\ud328\ud0b9 \uc7ac\uc9c8<\/li><li>\ud328\ud0b9 \uc555\ucd95\ub7c9<\/li><li>\uacf5\uc815\uc555\ub825\uacfc \uc628\ub3c4<\/li><li>Live-loaded packing \uc5ec\ubd80<\/li><\/ul>\n<p>\uc2a4\ud15c\uc774 \uc815\uc9c0\ud574 \uc788\ub354\ub77c\ub3c4 \uc6c0\uc9c1\uc774\ub824\ub294 \uc21c\uac04\uc5d0\ub294 \uc815\uc9c0\ub9c8\ucc30\uc774 \ubc1c\uc0dd\ud55c\ub2e4. \uc774\ub3d9 \uc911\uc5d0\ub294 \uc6b4\ub3d9\ub9c8\ucc30\uc774 \ubc1c\uc0dd\ud55c\ub2e4.<\/p>\n<div class=\"cv511-eq\">F<sub>breakaway<\/sub> \u2265 F<sub>static friction<\/sub><\/div>\n<div class=\"cv511-eq\">F<sub>travel<\/sub> \u2265 F<sub>dynamic friction<\/sub><\/div>\n<p>\ud328\ud0b9 \ub9c8\ucc30\ub825\uc740 \uc774\ub3d9 \ubc29\ud5a5\uc758 \ubc18\ub300 \ubc29\ud5a5\uc73c\ub85c \uc791\uc6a9\ud558\ubbc0\ub85c \uac1c\ubc29\uacfc \ud3d0\uc1c4 \uacc4\uc0b0\uc5d0\uc11c \uac01\uac01 \ubc29\ud5a5\uc744 \ubc14\uafb8\uc5b4 \uc801\uc6a9\ud55c\ub2e4.<\/p>\n<h2 id=\"cv511-additional\">D: \ucd94\uac00 \ud798<\/h2>\n<p>\ucd94\uac00 \ud798\uc5d0\ub294 \ub2e4\uc74c \ud56d\ubaa9\uc774 \ud3ec\ud568\ub420 \uc218 \uc788\ub2e4.<\/p>\n<ul><li>Bellows seal\uc758 \ucd95 \ubc29\ud5a5 \uac15\uc131<\/li><li>\ud2b9\uc218 \uc530\uc758 \ub9c8\ucc30<\/li><li>\ube44\ud45c\uc900 \ud2b8\ub9bc\uc758 \uae30\uacc4\uc801 \uc800\ud56d<\/li><li>\uc2a4\ud15c \ubc0f \ud50c\ub7ec\uadf8 \uc790\uc911<\/li><li>\uae30\ud0c0 \uc81c\uc870\uc0ac \uc9c0\uc815 \ud558\uc911<\/li><\/ul>\n<p>\uc774 \uac12\uc740 \uc77c\ubc18\uc2dd\ubcf4\ub2e4 \uc81c\uc870\uc0ac\uc758 \uc81c\ud488\ubcc4 \uc790\ub8cc\ub97c \uc0ac\uc6a9\ud558\ub294 \uac83\uc774 \uc6d0\uce59\uc774\ub2e4.<\/p>\n<h2 id=\"cv511-actuator\">\uc561\ucd94\uc5d0\uc774\ud130 \uce21 \ud798: \uacf5\uc555\ub825\uacfc \uc2a4\ud504\ub9c1\ub825<\/h2>\n<p>A, B, C, D\ub294 \ubc38\ube0c \uce21\uc5d0\uc11c \uc694\uad6c\ub418\ub294 \ud798\uc774\ub2e4. \uc561\ucd94\uc5d0\uc774\ud130 \uc2a4\ud504\ub9c1\uc740 \uc561\ucd94\uc5d0\uc774\ud130 \ub0b4\ubd80\uc5d0\uc11c \ud798\uc744 \uc0dd\uc131\ud558\uac70\ub098 \uacf5\uc555\ub825\uc5d0 \uc800\ud56d\ud55c\ub2e4.<\/p>\n<p>\ub2e4\uc774\uc5b4\ud504\ub7a8\uc5d0 \uc758\ud55c \uacf5\uc555\ub825\uc740 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n<div class=\"cv511-eq\">F<sub>air<\/sub>(x) = P<sub>loading<\/sub>(x)A<sub>effective<\/sub>(x)<\/div>\n<p>\uc2a4\ud504\ub9c1 \ud798\uc740 \ucd08\uae30 \uc555\ucd95\ub825\uacfc \uc2a4\ud2b8\ub85c\ud06c\uc5d0 \ub530\ub77c \uc99d\uac00\ud55c\ub2e4.<\/p>\n<div class=\"cv511-eq\">F<sub>spring<\/sub>(x) = F<sub>0<\/sub> + kx<\/div>\n<ul><li>F<sub>0<\/sub>: \uc2a4\ud504\ub9c1 \ucd08\uae30 \uc555\ucd95\ub825<\/li><li>k: \uc2a4\ud504\ub9c1 \uc0c1\uc218<\/li><li>x: \uc561\ucd94\uc5d0\uc774\ud130 \uc2a4\ud2b8\ub85c\ud06c<\/li><\/ul>\n<p>\ub2e4\uc774\uc5b4\ud504\ub7a8 \uc561\ucd94\uc5d0\uc774\ud130\uc758 \uc21c \ucd9c\ub825 \ucd94\ub825\uc740 \uacf5\uc555\ub825\uacfc \ubc18\ub300 \ubc29\ud5a5 \uc2a4\ud504\ub9c1\ub825\uc758 \ucc28\uc774\uc774\ub2e4.<\/p>\n<div class=\"cv511-eq\">F<sub>actuator,net<\/sub>(x) = F<sub>air<\/sub>(x) \u2212 F<sub>spring<\/sub>(x)<\/div>\n<p>\ub2e8, \uc704 \uc2dd\uc740 \uacf5\uc555\ub825\uc774 \uc791\ub3d9 \ubc29\ud5a5\uc774\uace0 \uc2a4\ud504\ub9c1\ub825\uc774 \ubc18\ub300 \ubc29\ud5a5\uc778 \uacbd\uc6b0\uc774\ub2e4. \uc694\uad6c \uc791\ub3d9 \ubc29\ud5a5\uc774 \uc2a4\ud504\ub9c1 \ubc29\ud5a5\uc774\ub77c\uba74 \ubd80\ud638\uac00 \ubc18\ub300\uac00 \ub41c\ub2e4.<\/p>\n<h2 id=\"cv511-ato\">Air-to-Open, Spring-to-Close<\/h2>\n<p>\uc774 \uad6c\uc131\uc5d0\uc11c\ub294 \uacf5\uc555\ub825\uc774 \ubc38\ube0c\ub97c \uc5f4\uace0, \uc2a4\ud504\ub9c1\ub825\uc774 \ubc38\ube0c\ub97c \ub2eb\ub294\ub2e4.<\/p>\n\n<div class=\"cv511-pair\">\n  <div class=\"cv511-card\">\n    <h4>\uac1c\ubc29 \uac00\uc6a9 \ucd94\ub825<\/h4>\n    <div class=\"cv511-eq\">F<sub>available,open<\/sub> = F<sub>air<\/sub> \u2212 F<sub>spring<\/sub><\/div>\n    <div class=\"cv511-eq\">F<sub>air<\/sub> \u2212 F<sub>spring<\/sub> \u2265 F<sub>required,open<\/sub><\/div>\n  <\/div>\n  <div class=\"cv511-card\">\n    <h4>\ud3d0\uc1c4 \uac00\uc6a9 \ucd94\ub825<\/h4>\n    <div class=\"cv511-eq\">F<sub>available,close<\/sub> = F<sub>spring<\/sub> \u2212 F<sub>air<\/sub><\/div>\n    <div class=\"cv511-eq\">F<sub>available,fail-close<\/sub> = F<sub>spring<\/sub><\/div>\n  <\/div>\n<\/div>\n\n<p>\uacf5\uae30 \uc0c1\uc2e4 \uc2dc\uc5d0\ub294 F<sub>air<\/sub> = 0\uc774\ubbc0\ub85c \uc2a4\ud504\ub9c1\ub9cc\uc73c\ub85c \ud3d0\uc1c4\ud55c\ub2e4.<\/p>\n<p>\ub530\ub77c\uc11c Fail-Close \uc870\uac74\uc5d0\uc11c\ub294 \uc2a4\ud504\ub9c1\ub825\uc774 \ud3d0\uc1c4 \uc800\ud56d\uc744 \uadf9\ubcf5\ud55c \ud6c4\uc5d0\ub3c4 \uc694\uad6c \uc2dc\ud2b8 \ud558\uc911\uc744 \ub0a8\uaca8\uc57c \ud55c\ub2e4.<\/p>\n<div class=\"cv511-eq\">F<sub>spring<\/sub> \u2265 F<sub>packing<\/sub> + F<sub>additional<\/sub> + F<sub>seat<\/sub> \u00b1 F<sub>unbalance<\/sub><\/div>\n<h2 id=\"cv511-atc\">Air-to-Close, Spring-to-Open<\/h2>\n<p>\uc774 \uad6c\uc131\uc5d0\uc11c\ub294 \uacf5\uc555\ub825\uc774 \ubc38\ube0c\ub97c \ub2eb\uace0, \uc2a4\ud504\ub9c1\ub825\uc774 \ubc38\ube0c\ub97c \uc5f0\ub2e4.<\/p>\n\n<div class=\"cv511-pair\">\n  <div class=\"cv511-card\">\n    <h4>\ud3d0\uc1c4 \uac00\uc6a9 \ucd94\ub825<\/h4>\n    <div class=\"cv511-eq\">F<sub>available,close<\/sub> = F<sub>air<\/sub> \u2212 F<sub>spring<\/sub><\/div>\n    <div class=\"cv511-eq\">F<sub>air<\/sub> \u2212 F<sub>spring<\/sub> \u2265 F<sub>required,close<\/sub><\/div>\n  <\/div>\n  <div class=\"cv511-card\">\n    <h4>\uac1c\ubc29 \uac00\uc6a9 \ucd94\ub825<\/h4>\n    <div class=\"cv511-eq\">F<sub>available,open<\/sub> = F<sub>spring<\/sub> \u2212 F<sub>air<\/sub><\/div>\n    <div class=\"cv511-eq\">F<sub>available,fail-open<\/sub> = F<sub>spring<\/sub><\/div>\n  <\/div>\n<\/div>\n\n<h2 id=\"cv511-bench\">Bench Set\uacfc \uc2a4\ud504\ub9c1 \ud798<\/h2>\n<p>Bench Set\uc740 \ubb34\ubd80\ud558 \uc870\uac74\uc5d0\uc11c \uc124\uc815\ud55c \uc561\ucd94\uc5d0\uc774\ud130 \uc2a4\ud504\ub9c1\uc758 \ucd08\uae30 \uc555\ucd95\uacfc \uc815\uaca9 \uc2a4\ud2b8\ub85c\ud06c \uc555\ub825 \ubc94\uc704\uc774\ub2e4.<\/p>\n<div class=\"cv511-eq\">P<sub>bench<\/sub>(x)A<sub>effective<\/sub>(x) \u2248 F<sub>spring<\/sub>(x)<\/div>\n<p>Bench Set \ud558\ud55c\uc740 \uc77c\ubc18\uc801\uc73c\ub85c \ucd5c\ucd08 \uc774\ub3d9\uc5d0 \ud544\uc694\ud55c \uc2a4\ud504\ub9c1 \ucd08\uae30 \uc555\ucd95\ub825\uacfc \uad00\ub828\ub41c\ub2e4.<\/p>\n<p>Bench Set \uc0c1\ud55c\uc740 \uc815\uaca9 \uc2a4\ud2b8\ub85c\ud06c\uc5d0\uc11c \uc99d\uac00\ud55c \uc2a4\ud504\ub9c1 \uc555\ucd95\ub825\uacfc \uad00\ub828\ub41c\ub2e4.<\/p>\n<div class=\"cv511-box cv511-note\"><strong class=\"cv511-box-title\">\uc8fc\uc758<\/strong><p>Bench Set\uc740 \ubc38\ube0c \uce21 \uc694\uad6c \ud798\uc774 \uc544\ub2c8\ub2e4. Bench Set\uc740 \uc561\ucd94\uc5d0\uc774\ud130 \ub0b4\ubd80 \uc2a4\ud504\ub9c1\uc758 \ud798\uc744 \uc555\ub825 \ubc94\uc704\ub85c \ud45c\ud604\ud55c \uc561\ucd94\uc5d0\uc774\ud130 \ud2b9\uc131\uc774\ub2e4.<\/p><\/div>\n<p>\ucd5c\uc885 \uc2dc\ud2b8 \ud558\uc911\uc740 \ub2e8\uc21c\ud788 \uc778\uac00 \uacf5\uae30\uc555 \uc804\uccb4\uac00 \uc544\ub2c8\ub2e4.<\/p>\n<div class=\"cv511-eq\">F<sub>seat<\/sub> = F<sub>actuator,net at seat<\/sub> \u2212 F<sub>other valve loads<\/sub><\/div>\n<p>\uc989, \ucd5c\uc885 \uc561\ucd94\uc5d0\uc774\ud130 \uc21c \ucd94\ub825\uc5d0\uc11c \ubd88\ud3c9\ud615\ub825, \ud328\ud0b9 \uc800\ud56d \ubc0f \ucd94\uac00 \ud558\uc911\uc744 \uc81c\uc678\ud55c \ub098\uba38\uc9c0\uac00 \uc2dc\ud2b8 \ud558\uc911\uc774 \ub41c\ub2e4.<\/p>\n<h2 id=\"cv511-openclose\">\uac1c\ubc29 \ubc0f \ud3d0\uc1c4 \uc694\uad6c \ucd94\ub825<\/h2>\n<h3>\uac1c\ubc29 \uc694\uad6c \ucd94\ub825<\/h3>\n<p>\uac1c\ubc29 \uc2dc\uc5d0\ub294 \uc2dc\ud2b8 \ud558\uc911\uc744 \uc0c8\ub85c \uc0dd\uc131\ud558\uc9c0 \uc54a\uc73c\ubbc0\ub85c \uc77c\ubc18\uc801\uc778 \uacc4\uc0b0\uc2dd\uc740 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n<div class=\"cv511-eq\">F<sub>required,open<\/sub> = F<sub>process,open<\/sub> + F<sub>packing<\/sub> + F<sub>additional<\/sub><\/div>\n<p>\uc5ec\uae30\uc11c \uacf5\uc815\ub825\uc774 \uac1c\ubc29\uc744 \ub3d5\ub294\ub2e4\uba74 \ud574\ub2f9 \ud798\uc740 \ube80\ub2e4.<\/p>\n<h3>\ucd5c\uc885 \ud3d0\uc1c4 \uc694\uad6c \ucd94\ub825<\/h3>\n<p>\ubd88\ud3c9\ud615\ub825\uc774 \ud3d0\uc1c4\ub97c \ubc29\ud574\ud558\ub294 \uacbd\uc6b0\uc5d0\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n<div class=\"cv511-eq\">F<sub>required,close<\/sub> = F<sub>unbalance<\/sub> + F<sub>packing<\/sub> + F<sub>additional<\/sub> + F<sub>seat<\/sub><\/div>\n<p>\ubd88\ud3c9\ud615\ub825\uc774 \ud3d0\uc1c4\ub97c \ub3d5\ub294 \uacbd\uc6b0\uc5d0\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n<div class=\"cv511-eq\">F<sub>required,close<\/sub> = F<sub>packing<\/sub> + F<sub>additional<\/sub> + F<sub>seat<\/sub> \u2212 F<sub>unbalance<\/sub><\/div>\n<p>\uc2dc\ud2b8 \ud558\uc911\uc740 \uc678\ubd80 \uc800\ud56d\ub825\uc774 \uc544\ub2c8\ub77c, \ub2e4\ub978 \ud558\uc911\uacfc \ud3c9\ud615\uc744 \uc774\ub8ec \ub4a4\uc5d0\ub3c4 \ub0a8\uaca8\uc57c \ud558\ub294 \ud798\uc774\ub2e4.<\/p>\n<h2 id=\"cv511-travel\">\uac1c\ub3c4\uc5d0 \ub530\ub978 \ud798\uc758 \ubcc0\ud654<\/h2>\n<p>\ubc38\ube0c\uc758 \uc694\uad6c \ud798\uc740 \uc2a4\ud2b8\ub85c\ud06c \uc804\uccb4\uc5d0\uc11c \uc77c\uc815\ud558\uc9c0 \uc54a\ub2e4.<\/p>\n<div class=\"cv511-table-wrap\"><table><thead><tr><th>\uc6b4\uc804 \uad6c\uac04<\/th><th>\uc8fc\uc694 \ud798<\/th><\/tr><\/thead><tbody><tr><td>\uc2dc\ud2b8 \uc774\ud0c8 \uc9c1\uc804<\/td><td>\uc815\uc9c0 \ud328\ud0b9 \ub9c8\ucc30, \uacf5\uc815\ub825, \uc2a4\ud504\ub9c1 \ub610\ub294 \uacf5\uc555\ub825<\/td><\/tr><tr><td>\uc774\ub3d9 \uad6c\uac04<\/td><td>\uac1c\ub3c4\ubcc4 \uacf5\uc815 \uc720\uccb4\ub825, \uc6b4\ub3d9 \ud328\ud0b9 \ub9c8\ucc30, \uc2a4\ud504\ub9c1\ub825<\/td><\/tr><tr><td>\uc2dc\ud2b8 \uc811\uadfc<\/td><td>\ubcc0\ud654\ud558\ub294 \uc720\uccb4\ub825, \ud328\ud0b9 \ub9c8\ucc30, \uc2a4\ud504\ub9c1\ub825<\/td><\/tr><tr><td>\uc2dc\ud2b8 \ucd5c\ucd08 \uc811\ucd09<\/td><td>\uc704\uce58 \ubcc0\ud654\uac00 \uac10\uc18c\ud558\uace0 \uc2dc\ud2b8 \ud558\uc911\uc774 \ubc1c\uc0dd\ud558\uae30 \uc2dc\uc791\ud568<\/td><\/tr><tr><td>\ucd5c\uc885 \ud3d0\uc1c4<\/td><td>\ucc28\ub2e8 \ubd88\ud3c9\ud615\ub825\uacfc \uae30\ud0c0 \ud558\uc911\uc744 \uc0c1\uc1c4\ud55c \ud6c4 \uc694\uad6c \uc2dc\ud2b8 \ud558\uc911 \ud655\ubcf4<\/td><\/tr><tr><td>\uacf5\uae30 \uc0c1\uc2e4<\/td><td>Fail-Safe \ubc29\ud5a5\uc758 \uc2a4\ud504\ub9c1\ub825\uc73c\ub85c \uc694\uad6c \uc548\uc804 \uc704\uce58 \ud655\ubcf4<\/td><\/tr><\/tbody><\/table><\/div>\n<p>Valve Signature\uc5d0\uc11c \uc2dc\ud2b8 \uc811\ucd09 \ud6c4 \uc2a4\ud2b8\ub85c\ud06c\uac00 \uac70\uc758 \ubcc0\ud558\uc9c0 \uc54a\ub294\ub370 \uc561\ucd94\uc5d0\uc774\ud130 \uc555\ub825 \ub610\ub294 \uacc4\uc0b0 \ud798\uc774 \uacc4\uc18d \uc99d\uac00\ud558\ub294 \uad6c\uac04\uc740 \ucd94\uac00 \ud798\uc774 \uc2dc\ud2b8 \ud558\uc911\uc73c\ub85c \ubcc0\ud658\ub418\ub294 \uad6c\uac04\uc73c\ub85c \ud574\uc11d\ud560 \uc218 \uc788\ub2e4.<\/p>\n<h2 id=\"cv511-selection\">\ucd5c\uc885 \uc561\ucd94\uc5d0\uc774\ud130 \uc120\uc815 \uc870\uac74<\/h2>\n<p>\uac1c\ubc29\uacfc \ud3d0\uc1c4 \uc694\uad6c \ucd94\ub825\uc744 \uac01\uac01 \uacc4\uc0b0\ud558\uace0, \uc804 \uc2a4\ud2b8\ub85c\ud06c\uc640 Fail-Safe \uc870\uac74\ub3c4 \ud568\uaed8 \uac80\ud1a0\ud55c\ub2e4.<\/p>\n<div class=\"cv511-eq\">F<sub>required,max<\/sub> = max[F<sub>required,open<\/sub>, F<sub>required,close<\/sub>, F<sub>required,travel<\/sub>, F<sub>required,fail-safe<\/sub>]<\/div>\n<p>\uadf8\ub7ec\ub098 \ub2e8\uc21c\ud788 \ucd5c\ub300 \uc694\uad6c\uac12\ub9cc \uad6c\ud574\uc11c\ub294 \ucda9\ubd84\ud558\uc9c0 \uc54a\ub2e4. \uc561\ucd94\uc5d0\uc774\ud130\uc758 \uac00\uc6a9 \ucd94\ub825\ub3c4 \uc2a4\ud2b8\ub85c\ud06c\uc5d0 \ub530\ub77c \ubcc0\ud558\uae30 \ub54c\ubb38\uc774\ub2e4.<\/p>\n<div class=\"cv511-eq\">F<sub>actuator,available<\/sub>(x) \u2265 F<sub>valve,required<\/sub>(x) &nbsp;&nbsp; \u2200x<\/div>\n<p>\uc120\uc815 \uc2dc \ub2e4\uc74c \ud56d\ubaa9\uc744 \ud655\uc778\ud55c\ub2e4.<\/p>\n<ol class=\"\"><li>\ucd5c\ub300 \ucc28\ub2e8 \ucc28\uc555\uacfc \ubd88\ud3c9\ud615 \uba74\uc801\uc744 \uacb0\uc815\ud55c\ub2e4.<\/li><li>\uac1c\ubc29 \ubc0f \ud3d0\uc1c4 \ubc29\ud5a5\uc758 \ubd88\ud3c9\ud615\ub825 \ubd80\ud638\ub97c \uacb0\uc815\ud55c\ub2e4.<\/li><li>\uc694\uad6c \ub204\uc124\ub4f1\uae09\uc5d0 \ub530\ub978 \uc2dc\ud2b8 \ud558\uc911\uc744 \uacc4\uc0b0\ud55c\ub2e4.<\/li><li>\uc81c\uc870\uc0ac \uc790\ub8cc\uc5d0\uc11c \ud328\ud0b9 \ub9c8\ucc30\ub825\uc744 \ud655\uc778\ud55c\ub2e4.<\/li><li>\ubca8\ub85c\uc988\uc640 \ud2b9\uc218 \uad6c\uc870\uc758 \ucd94\uac00 \ud798\uc744 \ubc18\uc601\ud55c\ub2e4.<\/li><li>\uac1c\ubc29 \ubc0f \ud3d0\uc1c4 \uc694\uad6c \ucd94\ub825\uc744 \uac01\uac01 \uacc4\uc0b0\ud55c\ub2e4.<\/li><li>\uc561\ucd94\uc5d0\uc774\ud130\uc758 \uacf5\uc555\ub825\uacfc \uc2a4\ud504\ub9c1\ub825 \uace1\uc120\uc744 \ud655\uc778\ud55c\ub2e4.<\/li><li>\ucd5c\uc18c \uacf5\uae09\uc555\ub825\uc5d0\uc11c \uc815\uc0c1 \uc791\ub3d9 \uac00\ub2a5 \uc5ec\ubd80\ub97c \uac80\uc99d\ud55c\ub2e4.<\/li><li>\uacf5\uae30 \uc0c1\uc2e4 \uc2dc Fail-Open \ub610\ub294 Fail-Close\ub97c \uac80\uc99d\ud55c\ub2e4.<\/li><li>\ucd5c\ub300 \uacf5\uae09\uc555\ub825\uc5d0\uc11c \uc2a4\ud15c\uacfc \ud2b8\ub9bc\uc758 \ud5c8\uc6a9\ud558\uc911\uc744 \ucd08\uacfc\ud558\uc9c0 \uc54a\ub294\uc9c0 \ud655\uc778\ud55c\ub2e4.<\/li><\/ol>\n<h2 id=\"cv511-conclusion\">\uacb0\ub860<\/h2>\n<div class=\"cv511-box cv511-key\"><strong class=\"cv511-box-title\">\ud575\uc2ec<\/strong>\n<p>5.11\uc758 A, B, C, D\ub294 \ubc38\ube0c \uce21\uc758 \uc694\uad6c \ud798\uc774\ub2e4. \uc2a4\ud504\ub9c1\ub825\uc740 A, B, C, D\uc5d0 \ucd94\uac00\ud558\ub294 \ub2e4\uc12f \ubc88\uc9f8 \ubc38\ube0c \ud558\uc911\uc774 \uc544\ub2c8\ub2e4.<\/p>\n<p>\uc2a4\ud504\ub9c1\ub825\uc740 \uacf5\uc555\ub825\uacfc \ud568\uaed8 \uc561\ucd94\uc5d0\uc774\ud130 \uce21\uc758 \uc21c \uac00\uc6a9 \ucd94\ub825\uc744 \uacb0\uc815\ud55c\ub2e4.<\/p>\n<p>\ub530\ub77c\uc11c \ubc38\ube0c \uc694\uad6c \ud798\uacfc \uc561\ucd94\uc5d0\uc774\ud130 \uac00\uc6a9 \ud798\uc744 \ubd84\ub9ac\ud558\uc5ec \uacc4\uc0b0\ud558\uace0, \uac1c\ubc29, \ud3d0\uc1c4, \uc804 \uc2a4\ud2b8\ub85c\ud06c \ubc0f Fail-Safe \uc870\uac74\uc5d0\uc11c \uac00\uc6a9 \ucd94\ub825\uc774 \uc694\uad6c \ucd94\ub825 \uc774\uc0c1\uc778\uc9c0 \uac80\uc99d\ud574\uc57c \ud55c\ub2e4.<\/p>\n<\/div>\n<div class=\"cv511-eq\"><span class=\"line\">\ubc38\ube0c \uce21 \uc694\uad6c \ud798: F<sub>unbalance<\/sub> + F<sub>seat<\/sub> + F<sub>packing<\/sub> + F<sub>additional<\/sub><\/span><span class=\"line\">\u21d4<\/span><span class=\"line\">\uc561\ucd94\uc5d0\uc774\ud130 \uce21 \uac00\uc6a9 \ud798: F<sub>air<\/sub> \u00b1 F<sub>spring<\/sub><\/span><\/div>\n<h2 id=\"cv511-reference\">\ucc38\uace0\uc790\ub8cc<\/h2>\n<ul><li>Emerson, <em>Control Valve Handbook<\/em>, Chapter 3, 5.11, 8.5.5.<\/li><li>Philip L. Skousen, <em>Valve Handbook<\/em>, 3rd Edition, Chapter 8.<\/li><\/ul>\n<\/div>\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-1.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"valve-1\uc758 \uc0bd\uc785.\"><\/object><a id=\"wp-block-file--media-2551eecb-7d47-466c-9325-8b728d9a329d\" href=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/08\/valve-1.pdf\">valve-1<\/a><a href=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/08\/valve-1.pdf\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-2551eecb-7d47-466c-9325-8b728d9a329d\">\ub2e4\uc6b4\ub85c\ub4dc<\/a><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/control.com\/textbook\/control-valves\/valve-positioners\/?utm_source=chatgpt.com\">https:\/\/control.com\/textbook\/control-valves\/valve-positioners\/?utm_source=chatgpt.com<\/a><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{\n  \"document\": {\n    \"title\": \"Control Valve Handbook 5.11 \uae00\ub85c\ube0c\ubc38\ube0c \uc561\ucd94\uc5d0\uc774\ud130 \uc0ac\uc774\uc9d5\",\n    \"language\": \"ko\",\n    \"purpose\": \"\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4\uae30\uc220\uc0ac \ub2f5\uc548 \ubc0f \uc81c\uc5b4\ubc38\ube0c \uc561\ucd94\uc5d0\uc774\ud130 \uc120\uc815 \uac1c\ub150 \uc815\ub9ac\",\n    \"scope\": &#91;\n      \"globe valve actuator sizing\",\n      \"valve-side required force\",\n      \"pneumatic actuator available force\",\n      \"actuator spring force\",\n      \"bench set\",\n      \"fail-safe verification\"\n    ]\n  },\n  \"core_principle\": {\n    \"statement\": \"\ubc38\ube0c \uce21 \uc694\uad6c \ucd94\ub825\uacfc \uc561\ucd94\uc5d0\uc774\ud130 \uce21 \uac00\uc6a9 \ucd94\ub825\uc744 \ubd84\ub9ac\ud558\uc5ec \uacc4\uc0b0\ud558\uace0, \uac1c\ubc29, \ud3d0\uc1c4, \uc804 \uc2a4\ud2b8\ub85c\ud06c \ubc0f Fail-Safe \uc870\uac74\uc5d0\uc11c \uac00\uc6a9 \ucd94\ub825\uc774 \uc694\uad6c \ucd94\ub825 \uc774\uc0c1\uc778\uc9c0 \uac80\uc99d\ud55c\ub2e4.\",\n    \"equation\": \"F_actuator_available(x) &gt;= F_valve_required(x) for all x\"\n  },\n  \"force_domains\": {\n    \"valve_side\": {\n      \"description\": \"\ubc38\ube0c \ubcf8\uccb4, \ud2b8\ub9bc, \ud328\ud0b9 \ubc0f \uacf5\uc815 \uc720\uccb4\ub85c\ubd80\ud130 \ubc1c\uc0dd\ud558\uac70\ub098 \uc694\uad6c\ub418\ub294 \ud798\",\n      \"components\": &#91;\n        \"unbalance force\",\n        \"seat load\",\n        \"packing friction\",\n        \"additional force\"\n      ],\n      \"equation\": \"F_valve_required = F_unbalance + F_seat + F_packing + F_additional\"\n    },\n    \"actuator_side\": {\n      \"description\": \"\uc561\ucd94\uc5d0\uc774\ud130\uac00 \uacf5\uc555\ub825\uacfc \ub0b4\ubd80 \uc2a4\ud504\ub9c1\ub825\uc73c\ub85c \uc0dd\uc131\ud558\ub294 \uc21c \uac00\uc6a9 \ucd94\ub825\",\n      \"components\": &#91;\n        \"diaphragm or piston air force\",\n        \"actuator spring force\"\n      ],\n      \"equation\": \"F_actuator_net = F_air plus_or_minus F_spring\"\n    }\n  },\n  \"valve_force_components\": {\n    \"A_unbalance_force\": {\n      \"symbol\": \"F_unbalance\",\n      \"definition\": \"\ud50c\ub7ec\uadf8 \uc591\uce21\uc758 \uc21c \uc555\ub825\ucc28\uac00 \uc21c \ubd88\ud3c9\ud615 \uba74\uc801\uc5d0 \uc791\uc6a9\ud558\uc5ec \ubc1c\uc0dd\ud558\ub294 \uacf5\uc815\ub825\",\n      \"equation\": \"F_unbalance = deltaP_net * A_unbalance\",\n      \"units_us\": \"lbf = psi * in^2\",\n      \"units_si\": \"N = Pa * m^2\",\n      \"direction_rule\": \"\uc694\uad6c \uc791\ub3d9 \ubc29\ud5a5\uc744 \ubc29\ud574\ud558\uba74 \ub354\ud558\uace0, \ub3c4\uc6b0\uba74 \ube80\ub2e4.\",\n      \"important_note\": \"Handbook\uc758 \uae30\ubcf8 \uc0ac\uc774\uc9d5\uc5d0\uc11c\ub294 \uc8fc\ub85c shutoff pressure differential\uc744 \uc0ac\uc6a9\ud558\uc9c0\ub9cc, \uc774\ub3d9 \uc911 \uc720\uccb4\ub825\uc740 \uac1c\ub3c4\uc640 \ud2b8\ub9bc\uc5d0 \ub530\ub77c \ub2ec\ub77c\uc9c8 \uc218 \uc788\ub2e4.\"\n    },\n    \"B_seat_load\": {\n      \"symbol\": \"F_seat\",\n      \"definition\": \"\uc694\uad6c \ub204\uc124\ub4f1\uae09\uc744 \ud655\ubcf4\ud558\uae30 \uc704\ud574 \ud50c\ub7ec\uadf8\uc640 \uc2dc\ud2b8 \uc0ac\uc774\uc5d0 \ucd5c\uc885\uc801\uc73c\ub85c \ud615\uc131\ud574\uc57c \ud558\ub294 \uc811\ucd09 \uc555\ucc29\ub825\",\n      \"not_definition\": \"\uc2dc\ud2b8\uc758 \ubb34\uac8c\uac00 \uc544\ub2c8\ub2e4.\",\n      \"equation\": \"F_seat = L_seat * C_port = L_seat * pi * d_port\",\n      \"existence_by_travel\": {\n        \"plug_not_in_contact\": 0,\n        \"first_contact\": \"seat load begins to develop\",\n        \"final_shutoff\": \"required seat load is maintained\"\n      },\n      \"force_character\": \"\uadf9\ubcf5\ud574\uc57c \ud558\ub294 \uc678\ubd80 \uc800\ud56d\ub825\uc774 \uc544\ub2c8\ub77c \ucd5c\uc885\uc801\uc73c\ub85c \ub0a8\uaca8\uc57c \ud558\ub294 \ubaa9\ud45c \ud798\"\n    },\n    \"C_packing_friction\": {\n      \"symbol\": \"F_packing\",\n      \"definition\": \"\ud328\ud0b9\uc774 \ubc38\ube0c \uc2a4\ud15c\uc758 \uc774\ub3d9\uc744 \ubc29\ud574\ud558\ub294 \ud798\",\n      \"types\": &#91;\n        \"static friction or breakaway friction\",\n        \"dynamic or running friction\"\n      ],\n      \"direction_rule\": \"\ud56d\uc0c1 \uc2a4\ud15c \uc774\ub3d9 \ubc29\ud5a5\uc758 \ubc18\ub300 \ubc29\ud5a5\uc73c\ub85c \uc791\uc6a9\ud55c\ub2e4.\",\n      \"dependent_variables\": &#91;\n        \"stem diameter\",\n        \"packing material\",\n        \"packing compression\",\n        \"process pressure\",\n        \"process temperature\",\n        \"live-loaded packing configuration\"\n      ]\n    },\n    \"D_additional_force\": {\n      \"symbol\": \"F_additional\",\n      \"definition\": \"\ud2b9\uc218 \ubc38\ube0c \uad6c\uc870\uc5d0 \uc758\ud574 \ucd94\uac00\ub418\ub294 \ud798\",\n      \"examples\": &#91;\n        \"bellows stiffness\",\n        \"special seal friction\",\n        \"miscellaneous mechanical resistance\",\n        \"stem and plug weight where applicable\"\n      ],\n      \"data_source\": \"manufacturer product data\"\n    }\n  },\n  \"actuator_force_components\": {\n    \"air_force\": {\n      \"symbol\": \"F_air\",\n      \"definition\": \"\ubd80\ud558 \uc555\ub825\uc774 \ub2e4\uc774\uc5b4\ud504\ub7a8 \ub610\ub294 \ud53c\uc2a4\ud1a4 \uc720\ud6a8\uba74\uc801\uc5d0 \uc791\uc6a9\ud558\uc5ec \ubc1c\uc0dd\ud558\ub294 \ud798\",\n      \"equation\": \"F_air(x) = P_loading(x) * A_effective(x)\"\n    },\n    \"spring_force\": {\n      \"symbol\": \"F_spring\",\n      \"definition\": \"\uc561\ucd94\uc5d0\uc774\ud130 \ub0b4\ubd80 \uc2a4\ud504\ub9c1\uc758 \ucd08\uae30 \uc555\ucd95\ub825\uacfc \uc2a4\ud2b8\ub85c\ud06c \uc555\ucd95\uc5d0 \uc758\ud574 \ubc1c\uc0dd\ud558\ub294 \ud798\",\n      \"equation\": \"F_spring(x) = F_preload + k*x\",\n      \"role\": &#91;\n        \"\uacf5\uc555 \uc791\ub3d9 \ubc29\ud5a5\uc5d0 \uc800\ud56d\",\n        \"\uacf5\uae30\uc555 \uac10\uc18c \uc2dc \ubc18\ub300 \ubc29\ud5a5 \uc791\ub3d9\",\n        \"\uacf5\uae30 \uc0c1\uc2e4 \uc2dc fail-safe \ub3d9\uc791 \uc81c\uacf5\"\n      ],\n      \"classification\": \"actuator-side force\",\n      \"not_classification\": \"A, B, C, D\uc5d0 \ud3ec\ud568\ub418\ub294 valve-side load\uac00 \uc544\ub2d8\"\n    }\n  },\n  \"bench_set\": {\n    \"definition\": \"\ubb34\ubd80\ud558 \uc870\uac74\uc5d0\uc11c \uc2a4\ud504\ub9c1 \uc870\uc808\uae30\ub85c \uc124\uc815\ud55c \uc561\ucd94\uc5d0\uc774\ud130 \uc2a4\ud504\ub9c1\uc758 \ucd08\uae30 \uc555\ucd95 \ubc0f \uc815\uaca9 \uc2a4\ud2b8\ub85c\ud06c \uc555\ub825 \ubc94\uc704\",\n    \"approximate_relation\": \"P_bench(x) * A_effective(x) approximately equals F_spring(x)\",\n    \"lower_limit_meaning\": \"\uc2a4\ud504\ub9c1 \ucd08\uae30 \uc555\ucd95\ub825\uc744 \uc774\uae30\uace0 \ucd5c\ucd08 \uc774\ub3d9\ud558\ub294 \uc555\ub825\uacfc \uad00\ub828\",\n    \"upper_limit_meaning\": \"\uc815\uaca9 \uc2a4\ud2b8\ub85c\ud06c\uc5d0\uc11c \uc99d\uac00\ud55c \uc2a4\ud504\ub9c1 \uc555\ucd95\ub825\uacfc \uad00\ub828\",\n    \"important_note\": \"Bench Set\uc740 \ubc38\ube0c \uc694\uad6c \ud798\uc774 \uc544\ub2c8\ub77c \uc561\ucd94\uc5d0\uc774\ud130 \uc2a4\ud504\ub9c1 \ud2b9\uc131\uc744 \uc555\ub825\uc73c\ub85c \ud45c\ud604\ud55c \uac12\uc774\ub2e4.\"\n  },\n  \"actuator_action_modes\": {\n    \"air_to_open_spring_to_close\": {\n      \"normal_open_available_force\": \"F_available_open = F_air - F_spring\",\n      \"normal_close_available_force\": \"F_available_close = F_spring - F_air\",\n      \"air_failure\": {\n        \"F_air\": 0,\n        \"available_force\": \"F_available_fail_close = F_spring\",\n        \"fail_action\": \"fail-close\"\n      },\n      \"verification\": \"Spring force at the fail condition must overcome closing resistance and provide the required seat load.\"\n    },\n    \"air_to_close_spring_to_open\": {\n      \"normal_close_available_force\": \"F_available_close = F_air - F_spring\",\n      \"normal_open_available_force\": \"F_available_open = F_spring - F_air\",\n      \"air_failure\": {\n        \"F_air\": 0,\n        \"available_force\": \"F_available_fail_open = F_spring\",\n        \"fail_action\": \"fail-open\"\n      },\n      \"verification\": \"Spring force at the fail condition must overcome opening resistance.\"\n    }\n  },\n  \"required_force_by_operation\": {\n    \"open\": {\n      \"equation\": \"F_required_open = F_process_open + F_packing + F_additional\",\n      \"seat_load\": 0,\n      \"note\": \"\uacf5\uc815\ub825\uc774 \uac1c\ubc29\uc744 \ub3c4\uc6b0\uba74 \uacf5\uc815\ub825\uc740 \uc694\uad6c \ucd94\ub825\uc5d0\uc11c \ube80\ub2e4.\"\n    },\n    \"close_process_resists\": {\n      \"equation\": \"F_required_close = F_unbalance + F_packing + F_additional + F_seat\"\n    },\n    \"close_process_assists\": {\n      \"equation\": \"F_required_close = F_packing + F_additional + F_seat - F_unbalance\"\n    },\n    \"travel\": {\n      \"equation\": \"F_required_travel(x) = F_process(x) + F_packing(x) + F_additional(x)\",\n      \"seat_load\": 0,\n      \"note\": \"\uc720\uccb4\ub825\uacfc \uc2a4\ud504\ub9c1\ub825\uc740 \uc2a4\ud2b8\ub85c\ud06c\uc5d0 \ub530\ub77c \ubcc0\ud560 \uc218 \uc788\ub2e4.\"\n    },\n    \"fail_safe\": {\n      \"equation\": \"F_spring_available_fail &gt;= F_valve_required_fail\",\n      \"note\": \"\uacf5\uae30 \uc0c1\uc2e4 \uc870\uac74\uc5d0\uc11c \uc2a4\ud504\ub9c1\ub9cc\uc73c\ub85c \uc694\uad6c \uc548\uc804\uc704\uce58\ub97c \ud655\ubcf4\ud574\uc57c \ud55c\ub2e4.\"\n    }\n  },\n  \"travel_force_story\": &#91;\n    {\n      \"stage\": \"open or mid-travel\",\n      \"seat_load\": 0,\n      \"main_forces\": &#91;\n        \"process force\",\n        \"packing friction\",\n        \"additional force\",\n        \"air force\",\n        \"spring force\"\n      ]\n    },\n    {\n      \"stage\": \"approaching seat\",\n      \"seat_load\": 0,\n      \"main_change\": \"process force changes as flow area and pressure distribution change\"\n    },\n    {\n      \"stage\": \"first seat contact\",\n      \"seat_load\": \"begins\",\n      \"main_change\": \"travel change becomes small\"\n    },\n    {\n      \"stage\": \"seating profile\",\n      \"seat_load\": \"increases\",\n      \"main_change\": \"additional actuator force is converted mainly into contact load rather than travel\"\n    },\n    {\n      \"stage\": \"final shutoff\",\n      \"seat_load\": \"required final value\",\n      \"main_change\": \"other valve loads are balanced and the remaining force is maintained as seat load\"\n    }\n  ],\n  \"selection_condition\": {\n    \"required_max_equation\": \"F_required_max = max(F_required_open, F_required_close, F_required_travel, F_required_fail_safe)\",\n    \"stronger_condition\": \"F_actuator_available(x) &gt;= F_valve_required(x) for every relevant travel position and action direction\",\n    \"reason\": \"\uc561\ucd94\uc5d0\uc774\ud130 \uac00\uc6a9 \ucd94\ub825\uacfc \ubc38\ube0c \uc694\uad6c \ucd94\ub825\uc740 \ubaa8\ub450 \uc2a4\ud2b8\ub85c\ud06c\uc5d0 \ub530\ub77c \ubcc0\ud560 \uc218 \uc788\uae30 \ub54c\ubb38\"\n  },\n  \"selection_procedure\": &#91;\n    \"\ubc38\ube0c \ud615\uc2dd, \ud2b8\ub9bc, \uc720\ub3d9 \ubc29\ud5a5 \ubc0f Fail Action\uc744 \uacb0\uc815\ud55c\ub2e4.\",\n    \"\ucd5c\ub300 \ucc28\ub2e8 \ucc28\uc555\uacfc \uc21c \ubd88\ud3c9\ud615 \uba74\uc801\uc744 \uacb0\uc815\ud55c\ub2e4.\",\n    \"\uac1c\ubc29 \ubc0f \ud3d0\uc1c4 \ubc29\ud5a5\uc5d0\uc11c \ubd88\ud3c9\ud615\ub825\uc758 \ubd80\ud638\ub97c \uacb0\uc815\ud55c\ub2e4.\",\n    \"\uc694\uad6c \ub204\uc124\ub4f1\uae09\uc5d0 \ub530\ub978 \uc2dc\ud2b8 \ud558\uc911\uc744 \uacc4\uc0b0\ud55c\ub2e4.\",\n    \"\uc81c\uc870\uc0ac \uc790\ub8cc\uc5d0\uc11c \ud328\ud0b9 \ub9c8\ucc30\ub825\uc744 \ud655\uc778\ud55c\ub2e4.\",\n    \"\ubca8\ub85c\uc988 \ubc0f \ud2b9\uc218 \uad6c\uc870\uc758 \ucd94\uac00 \ud798\uc744 \ubc18\uc601\ud55c\ub2e4.\",\n    \"\uac1c\ubc29 \ubc0f \ud3d0\uc1c4 \uc694\uad6c \ucd94\ub825\uc744 \uac01\uac01 \uacc4\uc0b0\ud55c\ub2e4.\",\n    \"\uc561\ucd94\uc5d0\uc774\ud130\uc758 \uacf5\uc555\ub825 \uace1\uc120\uacfc \uc2a4\ud504\ub9c1\ub825 \uace1\uc120\uc744 \ud655\uc778\ud55c\ub2e4.\",\n    \"\ucd5c\uc18c \uacf5\uae09\uc555\ub825\uc5d0\uc11c \uc815\uc0c1 \uc791\ub3d9\uc744 \uac80\uc99d\ud55c\ub2e4.\",\n    \"\uacf5\uae30 \uc0c1\uc2e4 \uc2dc \uc2a4\ud504\ub9c1\uc758 Fail-Safe \ub2a5\ub825\uc744 \uac80\uc99d\ud55c\ub2e4.\",\n    \"\ucd5c\ub300 \uacf5\uae09\uc555\ub825\uc5d0\uc11c \uc2a4\ud15c\uacfc \ud2b8\ub9bc \ud5c8\uc6a9\ud558\uc911 \ucd08\uacfc \uc5ec\ubd80\ub97c \ud655\uc778\ud55c\ub2e4.\",\n    \"\ubaa8\ub4e0 \uc870\uac74\uc744 \ub9cc\uc871\ud558\ub294 \uac00\uc7a5 \uc791\uc740 \uc801\ud569 \uc561\ucd94\uc5d0\uc774\ud130\ub97c \uc120\uc815\ud55c\ub2e4.\"\n  ],\n  \"common_misconceptions\": &#91;\n    {\n      \"incorrect\": \"\uc2a4\ud504\ub9c1 \ud798\uc740 A, B, C, D\uc5d0 \ub354\ud558\ub294 \ub2e4\uc12f \ubc88\uc9f8 \ubc38\ube0c \ud558\uc911\uc774\ub2e4.\",\n      \"correct\": \"\uc2a4\ud504\ub9c1 \ud798\uc740 \uc561\ucd94\uc5d0\uc774\ud130 \uce21 \uac00\uc6a9 \ucd94\ub825\uc744 \uacb0\uc815\ud558\ub294 \ud798\uc774\ub2e4.\"\n    },\n    {\n      \"incorrect\": \"A, B, C, D\ub294 \uc804 \uc2a4\ud2b8\ub85c\ud06c\uc5d0\uc11c \ud56d\uc0c1 \ub3d9\uc2dc\uc5d0 \uc791\uc6a9\ud55c\ub2e4.\",\n      \"correct\": \"\uac01 \ud798\uc758 \ud06c\uae30\uc640 \uc874\uc7ac \uc5ec\ubd80\ub294 \uac1c\ub3c4\uc640 \uc791\ub3d9 \uc0c1\ud0dc\uc5d0 \ub530\ub77c \ub2ec\ub77c\uc9c4\ub2e4.\"\n    },\n    {\n      \"incorrect\": \"Seat Load\ub294 \uac1c\ubc29 \uc911\uc5d0\ub3c4 \uadf9\ubcf5\ud574\uc57c \ud55c\ub2e4.\",\n      \"correct\": \"Seat Load\ub294 \ucd5c\uc885 \ud3d0\uc1c4 \uc2dc \ud655\ubcf4\ud574\uc57c \ud558\ub294 \uc555\ucc29\ub825\uc774\uba70 \uc2dc\ud2b8 \uc774\ud0c8 \ud6c4\uc5d0\ub294 0\uc774\ub2e4.\"\n    },\n    {\n      \"incorrect\": \"\ucd5c\uc885 \ud3d0\uc1c4 \ucd94\ub825\uc774 \ud56d\uc0c1 \ucd5c\ub300\uc774\ub2e4.\",\n      \"correct\": \"\uac1c\ubc29, \ud3d0\uc1c4, \uc804 \uc2a4\ud2b8\ub85c\ud06c \ubc0f Fail-Safe \uc870\uac74\uc744 \uac01\uac01 \uac80\ud1a0\ud574\uc57c \ud55c\ub2e4.\"\n    },\n    {\n      \"incorrect\": \"\uacf5\uc555\ub825 \uc804\uccb4\uac00 \ubc38\ube0c \ucd94\ub825\uc73c\ub85c \uc804\ub2ec\ub41c\ub2e4.\",\n      \"correct\": \"\uc2a4\ud504\ub9c1\uc774 \ubc18\ub300 \ubc29\ud5a5\uc774\uba74 \uacf5\uc555\ub825\uc5d0\uc11c \uc2a4\ud504\ub9c1\ub825\uc744 \uc81c\uc678\ud55c \uc21c\ud798\uc774 \ubc38\ube0c\uc5d0 \uc804\ub2ec\ub41c\ub2e4.\"\n    }\n  ],\n  \"source_basis\": &#91;\n    {\n      \"source\": \"Emerson Control Valve Handbook\",\n      \"sections\": &#91;\n        \"3.8.1 Diaphragm Actuators\",\n        \"5.11 Actuator Sizing\",\n        \"5.11.1 Globe Valves\",\n        \"8.5.5 Bench Set\"\n      ]\n    },\n    {\n      \"source\": \"Philip L. Skousen Valve Handbook, Third Edition\",\n      \"section\": \"Chapter 8 Actuator Sizing\"\n    }\n  ]\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Control Valve Handbook 5.11\uae00\ub85c\ube0c\ubc38\ube0c \uc561\ucd94\uc5d0\uc774\ud130 \uc0ac\uc774\uc9d5 \ubc38\ube0c \uce21 \uc694\uad6c \ucd94\ub825\uacfc \uc561\ucd94\uc5d0\uc774\ud130 \uce21 \uac00\uc6a9 \ucd94\ub825\uc758 \ubd84\ub9ac \uacc4\uc0b0 \ubaa9\ucc28 \uac1c\uc694 \ubc38\ube0c \uce21 [&hellip;]<\/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 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