{"id":8417,"date":"2026-06-14T20:33:54","date_gmt":"2026-06-14T20:33:54","guid":{"rendered":"https:\/\/www.yunrui-controls.com\/?p=8417"},"modified":"2026-06-14T20:34:56","modified_gmt":"2026-06-14T20:34:56","slug":"control-valve-cv-calculation-actuator-sizing","status":"publish","type":"post","link":"https:\/\/www.yunrui-controls.com\/vi\/control-valve-cv-calculation-actuator-sizing\/","title":{"rendered":"L\u1ef1a ch\u1ecdn b\u1ed9 truy\u1ec1n \u0111\u1ed9ng v\u00e0 t\u00ednh to\u00e1n k\u00edch th\u01b0\u1edbc van: C\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u00ednh to\u00e1n k\u1ef9 thu\u1eadt"},"content":{"rendered":"<div style=\"font-family: -apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,sans-serif; line-height: 1.7; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px;\">\n<div style=\"background: linear-gradient(135deg,#1e3a5f 0%,#2d5a87 100%); color: #fff; padding: 40px 30px; border-radius: 8px; margin-bottom: 30px;\">\n<h2 style=\"color: #fff; margin: 0 0 15px 0; font-size: 32px; font-weight: 600;\">H\u01b0\u1edbng d\u1eabn t\u00ednh to\u00e1n k\u1ef9 thu\u1eadt \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 k\u00edch th\u01b0\u1edbc van \u0111i\u1ec1u khi\u1ec3n v\u00e0 l\u1ef1a ch\u1ecdn b\u1ed9 truy\u1ec1n \u0111\u1ed9ng.<\/h2>\n<p style=\"color: #e0e8f0; margin: 0; font-size: 16px;\">N\u1eafm v\u1eefng c\u00e1ch t\u00ednh to\u00e1n h\u1ec7 s\u1ed1 truy\u1ec1n \u0111\u1ed9ng Cv, ph\u00e2n t\u00edch l\u1ef1c \u0111\u1ea9y v\u00e0 l\u1ef1a ch\u1ecdn k\u00edch th\u01b0\u1edbc b\u1ed9 ch\u1ea5p h\u00e0nh cho c\u00e1c \u1ee9ng d\u1ee5ng \u0111i\u1ec1u khi\u1ec3n quy tr\u00ecnh. C\u00f4ng th\u1ee9c k\u1ef9 thu\u1eadt, v\u00ed d\u1ee5 minh h\u1ecda v\u00e0 ph\u01b0\u01a1ng ph\u00e1p l\u1ef1a ch\u1ecdn \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m ch\u1ee9ng th\u1ef1c t\u1ebf.<\/p>\n<\/div>\n<div style=\"background: #f8fafc; border-left: 4px solid #2d5a87; padding: 20px; margin-bottom: 30px; border-radius: 0 8px 8px 0;\">\n<p style=\"margin: 0; color: #475569; font-size: 14px;\"><strong>\u0110i\u1ec1u h\u01b0\u1edbng nhanh:<\/strong> <a style=\"color: #2d5a87; text-decoration: none;\" href=\"#cv-basics\">Nguy\u00ean t\u1eafc c\u01a1 b\u1ea3n v\u1ec1 CV<\/a> | <a style=\"color: #2d5a87; text-decoration: none;\" href=\"#liquid-cv\">Cv d\u1ea1ng l\u1ecfng<\/a> | <a style=\"color: #2d5a87; text-decoration: none;\" href=\"#gas-cv\">Cv kh\u00ed<\/a> | <a style=\"color: #2d5a87; text-decoration: none;\" href=\"#steam-cv\">Steam CV<\/a> | <a style=\"color: #2d5a87; text-decoration: none;\" href=\"#actuator-thrust\">L\u1ef1c \u0111\u1ea9y c\u1ee7a b\u1ed9 truy\u1ec1n \u0111\u1ed9ng<\/a> | <a style=\"color: #2d5a87; text-decoration: none;\" href=\"#selection\">H\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn<\/a><\/p>\n<\/div>\n<h3 id=\"cv-basics\" style=\"color: #1e3a5f; font-size: 24px; margin-top: 40px; margin-bottom: 20px; border-bottom: 2px solid #e2e8f0; padding-bottom: 10px;\">1. Nguy\u00ean l\u00fd c\u01a1 b\u1ea3n v\u1ec1 h\u1ec7 s\u1ed1 l\u01b0u l\u01b0\u1ee3ng (Cv) c\u1ee7a van \u0111i\u1ec1u khi\u1ec3n<\/h3>\n<p>C\u00e1i <strong>h\u1ec7 s\u1ed1 l\u01b0u l\u01b0\u1ee3ng Cv<\/strong> Th\u00f4ng s\u1ed1 n\u00e0y \u0111\u1ecbnh l\u01b0\u1ee3ng kh\u1ea3 n\u0103ng cho ph\u00e9p ch\u1ea5t l\u1ecfng \u0111i qua c\u1ee7a van \u0111i\u1ec1u khi\u1ec3n. \u0110\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh trong \u0111i\u1ec1u ki\u1ec7n ti\u00eau chu\u1ea9n: n\u01b0\u1edbc \u1edf nhi\u1ec7t \u0111\u1ed9 60\u00b0F v\u1edbi \u0111\u1ed9 gi\u1ea3m \u00e1p su\u1ea5t 1 psi, \u0111o l\u01b0u l\u01b0\u1ee3ng b\u1eb1ng gallon M\u1ef9 m\u1ed7i ph\u00fat. C\u00e1c k\u1ef9 s\u01b0 l\u00e0m vi\u1ec7c v\u1edbi <a style=\"color: #2d5a87; text-decoration: none; font-weight: 600;\" href=\"https:\/\/www.yunrui-controls.com\/vi\/brands\/fisher\/\">Fisher<\/a> v\u00e0 c\u00e1c th\u01b0\u01a1ng hi\u1ec7u van c\u00f4ng nghi\u1ec7p kh\u00e1c d\u1ef1a v\u00e0o c\u00e1c ph\u00e9p t\u00ednh Cv ch\u00ednh x\u00e1c \u0111\u1ec3 l\u1ef1a ch\u1ecdn k\u00edch th\u01b0\u1edbc ph\u00f9 h\u1ee3p.<\/p>\n<div style=\"background: #e7f3ff; border-left: 5px solid #0066cc; padding: 20px; margin: 25px 0; border-radius: 0 5px 5px 0;\">\n<p style=\"margin: 0; color: #1e3a5f; font-size: 15px;\"><strong>\u0110\u1ecbnh ngh\u0129a ti\u00eau chu\u1ea9n:<\/strong> Cv = Q \u00d7 \u221a(SG\/\u0394P)<\/p>\n<p style=\"margin: 8px 0 0 0; color: #475569; font-size: 14px;\">Trong \u0111\u00f3 Q = l\u01b0u l\u01b0\u1ee3ng (gallon M\u1ef9\/ph\u00fat), SG = t\u1ef7 tr\u1ecdng ri\u00eang (n\u01b0\u1edbc = 1,0), \u0394P = \u0111\u1ed9 gi\u1ea3m \u00e1p su\u1ea5t (psi)<\/p>\n<\/div>\n<h4 style=\"color: #2d5a87; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\">1.1 Chuy\u1ec3n \u0111\u1ed5i Cv so v\u1edbi Kv<\/h4>\n<table style=\"width: 100%; border-collapse: collapse; font-size: 14px; box-shadow: 0 2px 4px rgba(0,0,0,0.1);\">\n<thead>\n<tr style=\"background: linear-gradient(135deg,#1e3a5f 0%,#2d5a87 100%); color: #fff;\">\n<th style=\"padding: 14px 12px; text-align: left; font-weight: 600;\">Ti\u00eau chu\u1ea9n<\/th>\n<th style=\"padding: 14px 12px; text-align: left; font-weight: 600;\">\u0110i\u1ec1u ki\u1ec7n<\/th>\n<th style=\"padding: 14px 12px; text-align: left; font-weight: 600;\">\u0110\u01a1n v\u1ecb<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 12px; border: 1px solid #e2e8f0; font-weight: 600;\">CV (M\u1ef9)<\/td>\n<td style=\"padding: 12px; border: 1px solid #e2e8f0;\">\u0394P = 1 psi, N\u01b0\u1edbc \u1edf 60\u00b0F<\/td>\n<td style=\"padding: 12px; border: 1px solid #e2e8f0;\">gallon M\u1ef9\/ph\u00fat<\/td>\n<\/tr>\n<tr style=\"background: #f8fafc;\">\n<td style=\"padding: 12px; border: 1px solid #e2e8f0; font-weight: 600;\">Kv (H\u1ec7 m\u00e9t)<\/td>\n<td style=\"padding: 12px; border: 1px solid #e2e8f0;\">\u0394P = 1 bar, N\u01b0\u1edbc \u1edf nhi\u1ec7t \u0111\u1ed9 5-30\u00b0C<\/td>\n<td style=\"padding: 12px; border: 1px solid #e2e8f0;\">m\u00b3\/h<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"margin-top: 15px;\"><strong>Chuy\u1ec3n \u0111\u1ed5i:<\/strong> Cv = 1,156 \u00d7 Kv<\/p>\n<h3 id=\"liquid-cv\" style=\"color: #1e3a5f; font-size: 24px; margin-top: 40px; margin-bottom: 20px; border-bottom: 2px solid #e2e8f0; padding-bottom: 10px;\">2. T\u00ednh to\u00e1n CV d\u1ea1ng l\u1ecfng<\/h3>\n<h4 style=\"color: #2d5a87; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\">2.1 C\u00f4ng th\u1ee9c c\u01a1 b\u1ea3n (L\u01b0u l\u01b0\u1ee3ng kh\u00f4ng b\u1ecb t\u1eafc ngh\u1ebdn)<\/h4>\n<div style=\"background: #f0f9ff; border: 2px solid #0ea5e9; padding: 25px; margin: 20px 0; border-radius: 8px;\">\n<p style=\"margin: 0; color: #0369a1; font-size: 18px; font-weight: 600; text-align: center;\">Cv = Q \u00d7 \u221a(SG \/ \u0394P)<\/p>\n<\/div>\n<h4 style=\"color: #2d5a87; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\">2.2 Kh\u1eafc ph\u1ee5c t\u00ecnh tr\u1ea1ng t\u1eafc ngh\u1ebdn d\u00f2ng ch\u1ea3y<\/h4>\n<p>Khi \u0111\u1ed9 gi\u1ea3m \u00e1p su\u1ea5t v\u01b0\u1ee3t qu\u00e1 gi\u00e1 tr\u1ecb t\u1edbi h\u1ea1n (nguy c\u01a1 b\u1ed1c h\u01a1i\/t\u1ea1o b\u1ecdt kh\u00ed):<\/p>\n<div style=\"background: #f0f9ff; border: 2px solid #0ea5e9; padding: 25px; margin: 20px 0; border-radius: 8px;\">\n<p style=\"margin: 0; color: #0369a1; font-size: 16px; font-weight: 600; text-align: center;\">Cv = Q \u00d7 \u221a(SG \/ (F<sub>L<\/sub>\u00b2 \u00d7 (P\u2081 \u2013 F<sub>F<\/sub> \u00d7 P<sub>v<\/sub>)))<\/p>\n<\/div>\n<table style=\"width: 100%; border-collapse: collapse; font-size: 14px; margin: 20px 0;\">\n<thead>\n<tr style=\"background: linear-gradient(135deg,#1e3a5f 0%,#2d5a87 100%); color: #fff;\">\n<th style=\"padding: 12px; text-align: left;\">Tham s\u1ed1<\/th>\n<th style=\"padding: 12px; text-align: left;\">S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<th style=\"padding: 12px; text-align: left;\">Gi\u00e1 tr\u1ecb \u0111i\u1ec3n h\u00ecnh<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 10px; border: 1px solid #e2e8f0;\">F<sub>L<\/sub><\/td>\n<td style=\"padding: 10px; border: 1px solid #e2e8f0;\">H\u1ec7 s\u1ed1 ph\u1ee5c h\u1ed3i \u00e1p su\u1ea5t<\/td>\n<td style=\"padding: 10px; border: 1px solid #e2e8f0;\">0,85-0,95 (van c\u1ea7u)<\/td>\n<\/tr>\n<tr style=\"background: #f8fafc;\">\n<td style=\"padding: 10px; border: 1px solid #e2e8f0;\">F<sub>F<\/sub><\/td>\n<td style=\"padding: 10px; border: 1px solid #e2e8f0;\">H\u1ec7 s\u1ed1 t\u1ef7 l\u1ec7 \u00e1p su\u1ea5t t\u1edbi h\u1ea1n<\/td>\n<td style=\"padding: 10px; border: 1px solid #e2e8f0;\">0.96-0.98<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 10px; border: 1px solid #e2e8f0;\">P<sub>v<\/sub><\/td>\n<td style=\"padding: 10px; border: 1px solid #e2e8f0;\">\u00c1p su\u1ea5t h\u01a1i c\u1ee7a ch\u1ea5t l\u1ecfng (psia)<\/td>\n<td style=\"padding: 10px; border: 1px solid #e2e8f0;\">Ph\u1ee5 thu\u1ed9c v\u00e0o ch\u1ea5t l\u1ecfng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4 style=\"color: #2d5a87; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\">2.3 V\u00ed d\u1ee5 minh h\u1ecda: \u1ee8ng d\u1ee5ng n\u01b0\u1edbc<\/h4>\n<div style=\"background: #f8fafc; border: 1px solid #e2e8f0; padding: 25px; margin: 20px 0; border-radius: 8px;\">\n<p style=\"margin: 0 0 15px 0; color: #1e3a5f; font-weight: 600;\">\u0110i\u1ec1u ki\u1ec7n quy tr\u00ecnh:<\/p>\n<ul style=\"margin: 0; padding-left: 20px; color: #475569;\">\n<li>M\u00f4i tr\u01b0\u1eddng: N\u01b0\u1edbc, T\u1ef7 tr\u1ecdng ri\u00eang = 1.0<\/li>\n<li>L\u01b0u l\u01b0\u1ee3ng: 100 gallon M\u1ef9\/ph\u00fat<\/li>\n<li>\u00c1p su\u1ea5t \u0111\u1ea7u v\u00e0o: 100 psig<\/li>\n<li>\u00c1p su\u1ea5t \u0111\u1ea7u ra: 80 psig<\/li>\n<li>Lo\u1ea1i van: Van c\u1ea7u, F<sub>L<\/sub> = 0.9<\/li>\n<\/ul>\n<p style=\"margin: 20px 0 10px 0; color: #1e3a5f; font-weight: 600;\">T\u00ednh to\u00e1n:<\/p>\n<ol style=\"margin: 0; padding-left: 20px; color: #475569; line-height: 1.8;\">\n<li>\u0394P = 100 \u2013 80 = 20 psi<\/li>\n<li>Ki\u1ec3m tra d\u00f2ng ch\u1ea3y b\u1ecb ngh\u1ebdn: \u0394P<sub>ph\u00ea b\u00ecnh<\/sub> = 0,9\u00b2 \u00d7 (114,7 \u2013 0,256) = 92,7 psi<\/li>\n<li>V\u00ec 20 psi &lt; 92,7 psi \u2192 d\u00f2ng ch\u1ea3y kh\u00f4ng b\u1ecb ngh\u1ebdn<\/li>\n<li>Cv = 100 \u00d7 \u221a(1,0 \/ 20) = 100 \u00d7 0,2236 = <strong>22.4<\/strong><\/li>\n<\/ol>\n<div style=\"background: #d4edda; border-left: 4px solid #28a745; padding: 15px; margin-top: 20px; border-radius: 0 5px 5px 0;\">\n<p style=\"margin: 0; color: #155724;\"><strong>L\u1ef1a ch\u1ecdn:<\/strong> Ch\u1ecdn van c\u00f3 h\u1ec7 s\u1ed1 Cv = 25-30 (1,2-1,5 l\u1ea7n h\u1ec7 s\u1ed1 an to\u00e0n)<\/p>\n<\/div>\n<\/div>\n<h3 id=\"gas-cv\" style=\"color: #1e3a5f; font-size: 24px; margin-top: 40px; margin-bottom: 20px; border-bottom: 2px solid #e2e8f0; padding-bottom: 10px;\">3. T\u00ednh to\u00e1n h\u1ec7 s\u1ed1 bi\u1ebfn thi\u00ean l\u01b0u l\u01b0\u1ee3ng kh\u00ed (Cv)<\/h3>\n<h4 style=\"color: #2d5a87; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\">3.1 D\u00f2ng ch\u1ea3y d\u01b0\u1edbi t\u1edbi h\u1ea1n (\u0394P\/P\u2081 &lt; 0,5)<\/h4>\n<div style=\"background: #f0f9ff; border: 2px solid #0ea5e9; padding: 25px; margin: 20px 0; border-radius: 8px;\">\n<p style=\"margin: 0; color: #0369a1; font-size: 16px; font-weight: 600; text-align: center;\">Cv = Q \/ (1360 \u00d7 \u221a(\u0394P \u00d7 P\u2082 \/ (SG \u00d7 T)))<\/p>\n<\/div>\n<h4 style=\"color: #2d5a87; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\">3.2 L\u01b0u l\u01b0\u1ee3ng t\u1edbi h\u1ea1n (\u0394P\/P\u2081 \u2265 0,5)<\/h4>\n<div style=\"background: #f0f9ff; border: 2px solid #0ea5e9; padding: 25px; margin: 20px 0; border-radius: 8px;\">\n<p style=\"margin: 0; color: #0369a1; font-size: 16px; font-weight: 600; text-align: center;\">Cv = Q \/ (834 \u00d7 F<sub>k<\/sub> \u00d7 P\u2081 \/ \u221a(SG \u00d7 T))<\/p>\n<\/div>\n<p>Trong \u0111\u00f3 F<sub>k<\/sub> = k\/1,4 (hi\u1ec7u ch\u1ec9nh t\u1ec9 s\u1ed1 nhi\u1ec7t dung ri\u00eang)<\/p>\n<h4 style=\"color: #2d5a87; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\">3.3 V\u00ed d\u1ee5 minh h\u1ecda: Kh\u00ed t\u1ef1 nhi\u00ean<\/h4>\n<div style=\"background: #f8fafc; border: 1px solid #e2e8f0; padding: 25px; margin: 20px 0; border-radius: 8px;\">\n<p style=\"margin: 0 0 15px 0; color: #1e3a5f; font-weight: 600;\">\u0110i\u1ec1u ki\u1ec7n quy tr\u00ecnh:<\/p>\n<ul style=\"margin: 0; padding-left: 20px; color: #475569;\">\n<li>M\u00f4i ch\u1ea5t: Kh\u00ed t\u1ef1 nhi\u00ean, t\u1ef7 tr\u1ecdng ri\u00eang SG = 0,65<\/li>\n<li>L\u01b0u l\u01b0\u1ee3ng: 5000 SCFH<\/li>\n<li>P\u2081 = 164,7 psia, P\u2082 = 114,7 psia<\/li>\n<li>Nhi\u1ec7t \u0111\u1ed9: 100\u00b0F (560\u00b0R)<\/li>\n<li>k = 1,3<\/li>\n<\/ul>\n<p style=\"margin: 20px 0 10px 0; color: #1e3a5f; font-weight: 600;\">T\u00ednh to\u00e1n:<\/p>\n<ol style=\"margin: 0; padding-left: 20px; color: #475569; line-height: 1.8;\">\n<li>\u0394P = 50 psi, \u0394P\/P\u2081 = 0,304 &lt; 0,5 \u2192 d\u01b0\u1edbi t\u1edbi h\u1ea1n<\/li>\n<li>Cv = 5000 \/ (1360 \u00d7 \u221a(50 \u00d7 114,7 \/ (0,65 \u00d7 560)))<\/li>\n<li>Cv = 5000 \/ (1360 \u00d7 3,97) = <strong>0.93<\/strong><\/li>\n<\/ol>\n<\/div>\n<h3 id=\"steam-cv\" style=\"color: #1e3a5f; font-size: 24px; margin-top: 40px; margin-bottom: 20px; border-bottom: 2px solid #e2e8f0; padding-bottom: 10px;\">4. T\u00ednh to\u00e1n h\u1ec7 s\u1ed1 Cv c\u1ee7a h\u01a1i n\u01b0\u1edbc<\/h3>\n<div style=\"background: #f0f9ff; border: 2px solid #0ea5e9; padding: 25px; margin: 20px 0; border-radius: 8px;\">\n<p style=\"margin: 0; color: #0369a1; font-size: 16px; font-weight: 600; text-align: center;\">H\u01a1i b\u00e3o h\u00f2a: Cv = W \/ (63,3 \u00d7 \u221a(\u0394P \u00d7 \u03c1))<\/p>\n<p style=\"margin: 15px 0 0 0; color: #0369a1; font-size: 16px; font-weight: 600; text-align: center;\">H\u01a1i n\u01b0\u1edbc qu\u00e1 nhi\u1ec7t: Cv = W \/ (63,3 \u00d7 F)<sub>sh<\/sub> \u00d7 \u221a(\u0394P \u00d7 \u03c1))<\/p>\n<\/div>\n<p>Trong \u0111\u00f3 W = l\u01b0u l\u01b0\u1ee3ng kh\u1ed1i l\u01b0\u1ee3ng (lb\/h), \u03c1 = m\u1eadt \u0111\u1ed9 h\u01a1i n\u01b0\u1edbc (lb\/ft\u00b3), F<sub>sh<\/sub> = hi\u1ec7u ch\u1ec9nh qu\u00e1 nhi\u1ec7t (1,0-1,2)<\/p>\n<h3 id=\"actuator-thrust\" style=\"color: #1e3a5f; font-size: 24px; margin-top: 40px; margin-bottom: 20px; border-bottom: 2px solid #e2e8f0; padding-bottom: 10px;\">5. T\u00ednh to\u00e1n l\u1ef1c \u0111\u1ea9y c\u1ee7a b\u1ed9 truy\u1ec1n \u0111\u1ed9ng<\/h3>\n<h4 style=\"color: #2d5a87; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\">5.1 B\u1ed9 truy\u1ec1n \u0111\u1ed9ng m\u00e0ng kh\u00ed n\u00e9n<\/h4>\n<div style=\"background: #f0f9ff; border: 2px solid #0ea5e9; padding: 25px; margin: 20px 0; border-radius: 8px;\">\n<p style=\"margin: 0; color: #0369a1; font-size: 16px; font-weight: 600; text-align: center;\">F = P \u00d7 A<sub>e<\/sub> \u00d7 \u03b7<\/p>\n<p style=\"margin: 10px 0 0 0; color: #0369a1; font-size: 14px; text-align: center;\">V\u1edbi l\u00f2 xo: F = P \u00d7 A<sub>e<\/sub> \u2013 k \u00d7 x<\/p>\n<\/div>\n<h4 style=\"color: #2d5a87; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\">5.2 V\u00ed d\u1ee5 minh h\u1ecda: T\u00ednh to\u00e1n l\u1ef1c \u0111\u1ea9y<\/h4>\n<div style=\"background: #f8fafc; border: 1px solid #e2e8f0; padding: 25px; margin: 20px 0; border-radius: 8px;\">\n<p style=\"margin: 0 0 15px 0; color: #1e3a5f; font-weight: 600;\">Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt b\u1ed9 truy\u1ec1n \u0111\u1ed9ng:<\/p>\n<ul style=\"margin: 0; padding-left: 20px; color: #475569;\">\n<li>\u0110\u01b0\u1eddng k\u00ednh m\u00e0ng loa: 200 mm<\/li>\n<li>T\u00edn hi\u1ec7u: 20-100 kPa<\/li>\n<li>Hi\u1ec7u su\u1ea5t \u03b7: 0,85<\/li>\n<\/ul>\n<p style=\"margin: 20px 0 10px 0; color: #1e3a5f; font-weight: 600;\">T\u00ednh to\u00e1n:<\/p>\n<ol style=\"margin: 0; padding-left: 20px; color: #475569; line-height: 1.8;\">\n<li>A<sub>e<\/sub> = \u03c0 \u00d7 (0,1)\u00b2 = 0,0314 m\u00b2<\/li>\n<li>F<sub>t\u1ed1i \u0111a<\/sub> = 100.000 \u00d7 0,0314 = 3140 N<\/li>\n<li>F<sub>\u0111\u1ea7u ra<\/sub> = 3140 \u00d7 0,85 = <strong>2670 B\u1eafc<\/strong><\/li>\n<\/ol>\n<\/div>\n<h4 style=\"color: #2d5a87; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\">5.3 Y\u00eau c\u1ea7u v\u1ec1 m\u00f4-men xo\u1eafn c\u1ee7a van<\/h4>\n<div style=\"background: #f0f9ff; border: 2px solid #0ea5e9; padding: 25px; margin: 20px 0; border-radius: 8px;\">\n<p style=\"margin: 0; color: #0369a1; font-size: 16px; font-weight: 600; text-align: center;\">T = K \u00d7 \u0394P \u00d7 D\u00b3<\/p>\n<\/div>\n<table style=\"width: 100%; border-collapse: collapse; font-size: 14px; margin: 20px 0;\">\n<thead>\n<tr style=\"background: linear-gradient(135deg,#1e3a5f 0%,#2d5a87 100%); color: #fff;\">\n<th style=\"padding: 12px; text-align: left;\">Lo\u1ea1i van<\/th>\n<th style=\"padding: 12px; text-align: left;\">H\u1ec7 s\u1ed1 m\u00f4-men xo\u1eafn K<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 10px; border: 1px solid #e2e8f0;\">Van bi<\/td>\n<td style=\"padding: 10px; border: 1px solid #e2e8f0;\">0,05 \u2013 0,15<\/td>\n<\/tr>\n<tr style=\"background: #f8fafc;\">\n<td style=\"padding: 10px; border: 1px solid #e2e8f0;\">Van b\u01b0\u1edbm<\/td>\n<td style=\"padding: 10px; border: 1px solid #e2e8f0;\">0,10 \u2013 0,30<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 10px; border: 1px solid #e2e8f0;\">Van n\u00fat<\/td>\n<td style=\"padding: 10px; border: 1px solid #e2e8f0;\">0,20 \u2013 0,40<\/td>\n<\/tr>\n<tr style=\"background: #f8fafc;\">\n<td style=\"padding: 10px; border: 1px solid #e2e8f0;\">Van c\u1ea7u<\/td>\n<td style=\"padding: 10px; border: 1px solid #e2e8f0;\">0,30 \u2013 0,60<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3 id=\"selection\" style=\"color: #1e3a5f; font-size: 24px; margin-top: 40px; margin-bottom: 20px; border-bottom: 2px solid #e2e8f0; padding-bottom: 10px;\">6. Quy tr\u00ecnh l\u1ef1a ch\u1ecdn b\u1ed9 truy\u1ec1n \u0111\u1ed9ng<\/h3>\n<div style=\"background: #fef3c7; border-left: 4px solid #f59e0b; padding: 20px; margin: 20px 0; border-radius: 0 5px 5px 0;\">\n<p style=\"margin: 0; color: #92400e; font-weight: 600;\">H\u1ec7 s\u1ed1 an to\u00e0n: SF = F<sub>c\u00f3 s\u1eb5n<\/sub> \/ F<sub>y\u00eau c\u1ea7u<\/sub> = 1,5 \u2013 2,0<\/p>\n<\/div>\n<h4 style=\"color: #2d5a87; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\">Danh s\u00e1ch ki\u1ec3m tra l\u1ef1a ch\u1ecdn:<\/h4>\n<ol style=\"padding-left: 20px; color: #475569; line-height: 1.8;\">\n<li>X\u00e1c \u0111\u1ecbnh lo\u1ea1i v\u00e0 k\u00edch th\u01b0\u1edbc van d\u1ef1a tr\u00ean y\u00eau c\u1ea7u c\u1ee7a quy tr\u00ecnh.<\/li>\n<li>T\u00ednh to\u00e1n h\u1ec7 s\u1ed1 Cv c\u1ea7n thi\u1ebft cho d\u1ecbch v\u1ee5 ch\u1ea5t l\u1ecfng, kh\u00ed ho\u1eb7c h\u01a1i n\u01b0\u1edbc.<\/li>\n<li>T\u00ednh to\u00e1n m\u00f4-men xo\u1eafn\/l\u1ef1c \u0111\u1ea9y c\u1ee7a van, bao g\u1ed3m c\u1ea3 ma s\u00e1t gio\u0103ng.<\/li>\n<li>Ch\u1ecdn lo\u1ea1i b\u1ed9 truy\u1ec1n \u0111\u1ed9ng (kh\u00ed n\u00e9n, \u0111i\u1ec7n, th\u1ee7y l\u1ef1c)<\/li>\n<li>Ki\u1ec3m tra xem \u0111\u1ea7u ra c\u1ee7a b\u1ed9 truy\u1ec1n \u0111\u1ed9ng c\u00f3 v\u01b0\u1ee3t qu\u00e1 y\u00eau c\u1ea7u c\u1ee7a van v\u1edbi h\u1ec7 s\u1ed1 an to\u00e0n hay kh\u00f4ng.<\/li>\n<li>Ki\u1ec3m tra xem th\u1eddi gian ph\u1ea3n h\u1ed3i c\u00f3 \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u c\u1ee7a quy tr\u00ecnh hay kh\u00f4ng.<\/li>\n<li>X\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed an to\u00e0n khi x\u1ea3y ra l\u1ed7i (l\u1ed7i m\u1edf, l\u1ed7i \u0111\u00f3ng, l\u1ed7i cu\u1ed1i c\u00f9ng)<\/li>\n<\/ol>\n<h3 style=\"color: #1e3a5f; font-size: 24px; margin-top: 40px; margin-bottom: 20px; border-bottom: 2px solid #e2e8f0; padding-bottom: 10px;\">7. T\u00e0i li\u1ec7u tham kh\u1ea3o v\u1ec1 l\u1ef1a ch\u1ecdn van Fisher<\/h3>\n<p>Khi \u00e1p d\u1ee5ng c\u00e1c ph\u00e9p t\u00ednh n\u00e0y v\u00e0o c\u00e1c d\u1ef1 \u00e1n th\u1ef1c t\u1ebf, <a style=\"color: #2d5a87; text-decoration: none; font-weight: 600;\" href=\"https:\/\/www.yunrui-controls.com\/vi\/brands\/fisher\/\">Fisher<\/a> Cung c\u1ea5p ph\u1ea7n m\u1ec1m t\u00ednh to\u00e1n k\u00edch th\u01b0\u1edbc van to\u00e0n di\u1ec7n v\u00e0 t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt. <strong>S\u1ed5 tay van \u0111i\u1ec1u khi\u1ec3n<\/strong> \u0110\u00e2y v\u1eabn l\u00e0 ngu\u1ed3n tham kh\u1ea3o ch\u00ednh trong ng\u00e0nh v\u1ec1 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u00ednh to\u00e1n h\u1ec7 s\u1ed1 Cv, ph\u00e2n t\u00edch d\u00f2ng ch\u1ea3y ngh\u1ebdn v\u00e0 d\u1ef1 \u0111o\u00e1n ti\u1ebfng \u1ed3n.<\/p>\n<p>D\u00e0nh cho c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh kh\u1eafc nghi\u1ec7t, <a style=\"color: #2d5a87; text-decoration: none; font-weight: 600;\" href=\"https:\/\/www.yunrui-controls.com\/vi\/brands\/fisher\/\">C\u1ee7a Fisher<\/a> <strong>Cavitrol<\/strong> V\u00e0 <strong>Th\u00ec th\u1ea7m<\/strong> C\u00e1c c\u00f4ng ngh\u1ec7 c\u1eaft g\u1ecdt chuy\u00ean d\u1ee5ng gi\u1ea3i quy\u1ebft c\u00e1c th\u00e1ch th\u1ee9c v\u1ec1 gi\u1ea3m \u00e1p su\u1ea5t cao v\u00e0 ti\u1ebfng \u1ed3n v\u01b0\u1ee3t xa c\u00e1c t\u00ednh to\u00e1n Cv c\u01a1 b\u1ea3n. Vi\u1ec7c k\u1ebft h\u1ee3p c\u00e1c c\u00f4ng ngh\u1ec7 c\u1eaft g\u1ecdt chuy\u00ean d\u1ee5ng n\u00e0y v\u1edbi vi\u1ec7c l\u1ef1a ch\u1ecdn k\u00edch th\u01b0\u1edbc ch\u00ednh x\u00e1c \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady l\u00e2u d\u00e0i trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh kh\u1eafc nghi\u1ec7t.<\/p>\n<h3 style=\"color: #1e3a5f; font-size: 24px; margin-top: 40px; margin-bottom: 20px; border-bottom: 2px solid #e2e8f0; padding-bottom: 10px;\">8. C\u00f4ng th\u1ee9c tham kh\u1ea3o nhanh<\/h3>\n<table style=\"width: 100%; border-collapse: collapse; font-size: 14px; box-shadow: 0 2px 4px rgba(0,0,0,0.1);\">\n<thead>\n<tr style=\"background: linear-gradient(135deg,#1e3a5f 0%,#2d5a87 100%); color: #fff;\">\n<th style=\"padding: 14px 12px; text-align: left; font-weight: 600;\">\u1ee8ng d\u1ee5ng<\/th>\n<th style=\"padding: 14px 12px; text-align: left; font-weight: 600;\">C\u00f4ng th\u1ee9c<\/th>\n<th style=\"padding: 14px 12px; text-align: left; font-weight: 600;\">\u0110\u01a1n v\u1ecb<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 12px; border: 1px solid #e2e8f0; font-weight: 600;\">Ch\u1ea5t l\u1ecfng (kh\u00f4ng b\u1ecb ngh\u1eb9n)<\/td>\n<td style=\"padding: 12px; border: 1px solid #e2e8f0;\">Cv = Q \u00d7 \u221a(SG\/\u0394P)<\/td>\n<td style=\"padding: 12px; border: 1px solid #e2e8f0;\">Q: gpm (\u0111\u01a1n v\u1ecb \u0111o l\u01b0u l\u01b0\u1ee3ng t\u00ednh b\u1eb1ng gallon M\u1ef9), \u0394P: psi<\/td>\n<\/tr>\n<tr style=\"background: #f8fafc;\">\n<td style=\"padding: 12px; border: 1px solid #e2e8f0; font-weight: 600;\">Kh\u00ed (d\u01b0\u1edbi \u0111i\u1ec3m t\u1edbi h\u1ea1n)<\/td>\n<td style=\"padding: 12px; border: 1px solid #e2e8f0;\">Cv = Q\/(1360\u00d7\u221a(\u0394P\u00d7P\u2082\/(SG\u00d7T)))<\/td>\n<td style=\"padding: 12px; border: 1px solid #e2e8f0;\">Q: SCFH, T: \u00b0R<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 12px; border: 1px solid #e2e8f0; font-weight: 600;\">H\u01a1i n\u01b0\u1edbc b\u00e3o h\u00f2a<\/td>\n<td style=\"padding: 12px; border: 1px solid #e2e8f0;\">Cv = W\/(63,3\u00d7\u221a(\u0394P\u00d7\u03c1))<\/td>\n<td style=\"padding: 12px; border: 1px solid #e2e8f0;\">W: lb\/h, \u03c1: lb\/ft\u00b3<\/td>\n<\/tr>\n<tr style=\"background: #f8fafc;\">\n<td style=\"padding: 12px; border: 1px solid #e2e8f0; font-weight: 600;\">L\u1ef1c \u0111\u1ea9y c\u1ee7a b\u1ed9 truy\u1ec1n \u0111\u1ed9ng<\/td>\n<td style=\"padding: 12px; border: 1px solid #e2e8f0;\">F = P \u00d7 A<sub>e<\/sub> \u00d7 \u03b7<\/td>\n<td style=\"padding: 12px; border: 1px solid #e2e8f0;\">P: Pa, A: m\u00b2<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 12px; border: 1px solid #e2e8f0; font-weight: 600;\">M\u00f4-men xo\u1eafn van<\/td>\n<td style=\"padding: 12px; border: 1px solid #e2e8f0;\">T = K \u00d7 \u0394P \u00d7 D\u00b3<\/td>\n<td style=\"padding: 12px; border: 1px solid #e2e8f0;\">D: m, \u0394P: Pa<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div style=\"background: #e7f3ff; border-left: 5px solid #0066cc; padding: 20px; margin: 30px 0; border-radius: 0 5px 5px 0;\">\n<p style=\"margin: 0; color: #1e3a5f; font-weight: 600;\">B\u1ea1n c\u1ea7n tr\u1ee3 gi\u00fap v\u1ec1 k\u00edch th\u01b0\u1edbc van?<\/p>\n<p style=\"margin: 10px 0 0 0; color: #475569;\">YUNRUI cung c\u1ea5p h\u00e0ng ch\u00ednh h\u00e3ng <a style=\"color: #2d5a87; text-decoration: none; font-weight: 600;\" href=\"https:\/\/www.yunrui-controls.com\/vi\/brands\/fisher\/control-valves\/\">Van \u0111i\u1ec1u khi\u1ec3n Fisher<\/a>, Ch\u00fang t\u00f4i cung c\u1ea5p c\u00e1c thi\u1ebft b\u1ecb \u0111\u1ecbnh v\u1ecb v\u00e0 b\u1ed9 truy\u1ec1n \u0111\u1ed9ng cho c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p ch\u1ebf bi\u1ebfn tr\u00ean to\u00e0n th\u1ebf gi\u1edbi. C\u00e1c k\u1ef9 s\u01b0 \u1ee9ng d\u1ee5ng c\u1ee7a ch\u00fang t\u00f4i c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 b\u1ea1n trong vi\u1ec7c l\u1ef1a ch\u1ecdn van, t\u00ednh to\u00e1n h\u1ec7 s\u1ed1 Cv v\u00e0 x\u00e1c \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc b\u1ed9 truy\u1ec1n \u0111\u1ed9ng ph\u00f9 h\u1ee3p v\u1edbi \u0111i\u1ec1u ki\u1ec7n c\u1ee5 th\u1ec3 c\u1ee7a b\u1ea1n.<\/p>\n<p style=\"margin: 15px 0 0 0; color: #475569;\">Li\u00ean h\u1ec7 v\u1edbi ch\u00fang t\u00f4i t\u1ea1i <a style=\"color: #2d5a87; text-decoration: none; font-weight: 600;\" href=\"mailto:sales@yunrui-controls.com\">sales@yunrui-controls.com<\/a> ho\u1eb7c WhatsApp <a style=\"color: #2d5a87; text-decoration: none; font-weight: 600;\" href=\"https:\/\/wa.me\/8618710784030\">+86 187 1078 4030<\/a>.<\/p>\n<\/div>\n<h3 style=\"color: #1e3a5f; font-size: 24px; margin-top: 40px; margin-bottom: 20px; border-bottom: 2px solid #e2e8f0; padding-bottom: 10px;\">\u0110\u1ec1 xu\u1ea5t \u0111\u1ecdc<\/h3>\n<ul style=\"padding-left: 20px; color: #475569; line-height: 1.8;\">\n<li><a style=\"color: #2d5a87; text-decoration: none; font-weight: 500;\" href=\"https:\/\/www.yunrui-controls.com\/vi\/valve-positioner-working-principle-troubleshooting\/\">H\u01b0\u1edbng d\u1eabn \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 b\u1ed9 \u0111\u1ecbnh v\u1ecb van: Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng + Kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng<\/a><\/li>\n<li><a style=\"color: #2d5a87; text-decoration: none; font-weight: 500;\" href=\"https:\/\/www.yunrui-controls.com\/vi\/control-valve-accessories-guide\/\">H\u01b0\u1edbng d\u1eabn ph\u1ee5 ki\u1ec7n van \u0111i\u1ec1u khi\u1ec3n<\/a><\/li>\n<li><a style=\"color: #2d5a87; text-decoration: none; font-weight: 500;\" href=\"https:\/\/www.yunrui-controls.com\/vi\/fisher-dvc6200-positioners-emerson-ams-trex\/\">B\u1ed9 \u0111\u1ecbnh v\u1ecb Fisher DVC6200: C\u1ea5u h\u00ecnh v\u1edbi Emerson AMS Trex<\/a><\/li>\n<li><a style=\"color: #2d5a87; text-decoration: none; font-weight: 500;\" href=\"https:\/\/www.yunrui-controls.com\/vi\/control-valve-waterproof-and-moisture-proof-measures\/\">C\u00e1c bi\u1ec7n ph\u00e1p ch\u1ed1ng th\u1ea5m n\u01b0\u1edbc v\u00e0 ch\u1ed1ng \u1ea9m cho van \u0111i\u1ec1u khi\u1ec3n: H\u01b0\u1edbng d\u1eabn b\u1ea3o v\u1ec7 c\u00f4ng nghi\u1ec7p to\u00e0n di\u1ec7n<\/a><\/li>\n<li><a style=\"color: #2d5a87; text-decoration: none; font-weight: 500;\" href=\"https:\/\/www.yunrui-controls.com\/vi\/transmitter-zero-migration-guide-positive-vs-negative-migration-explained\/\">H\u01b0\u1edbng d\u1eabn v\u1ec1 qu\u00e1 tr\u00ecnh di chuy\u1ec3n m\u00e1y ph\u00e1t s\u1ed1 0: Gi\u1ea3i th\u00edch v\u1ec1 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa di chuy\u1ec3n t\u00edch c\u1ef1c v\u00e0 ti\u00eau c\u1ef1c<\/a><\/li>\n<li><a style=\"color: #2d5a87; text-decoration: none; font-weight: 500;\" href=\"https:\/\/www.yunrui-controls.com\/vi\/radar-level-transmitter-frequency-guide\/\">H\u01b0\u1edbng d\u1eabn t\u1ea7n s\u1ed1 m\u00e1y ph\u00e1t t\u00edn hi\u1ec7u \u0111o m\u1ee9c b\u1eb1ng radar<\/a><\/li>\n<li><a style=\"color: #2d5a87; text-decoration: none; font-weight: 500;\" href=\"https:\/\/www.yunrui-controls.com\/vi\/temperature-transmitter-configuration-and-application-a-complete-technical-guide\/\">C\u1ea5u h\u00ecnh v\u00e0 \u1ee9ng d\u1ee5ng b\u1ed9 truy\u1ec1n t\u00edn hi\u1ec7u nhi\u1ec7t \u0111\u1ed9: H\u01b0\u1edbng d\u1eabn k\u1ef9 thu\u1eadt \u0111\u1ea7y \u0111\u1ee7<\/a><\/li>\n<\/ul>\n<hr style=\"border: none; height: 2px; background: linear-gradient(90deg,#1e3a5f 0%,transparent 100%); margin: 40px 0;\" \/>\n<p style=\"color: #64748b; font-size: 14px;\"><em>C\u1eadp nh\u1eadt l\u1ea7n cu\u1ed1i: Th\u00e1ng 6 n\u0103m 2026\u00a0<\/em><\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Control Valve Sizing and Actuator Selection: Complete Engineering Calculation Guide Master Cv calculation, thrust analysis, and actuator sizing for process control applications. Technical formulas, worked examples, and field-proven selection methods. Quick Navigation: Cv Fundamentals | Liquid Cv | Gas Cv | Steam Cv | Actuator Thrust | Selection Guide 1. Control Valve Flow Coefficient (Cv) [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":8419,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"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":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","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":""}},"footnotes":""},"categories":[384,1],"tags":[],"class_list":["post-8417","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","category-blogs"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.8 (Yoast SEO v26.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Actuator and Valve Sizing: Engineering Calculation Methods<\/title>\n<meta name=\"description\" content=\"Engineering methods for control valve sizing and actuator selection. 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