{"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\/ms\/control-valve-cv-calculation-actuator-sizing\/","title":{"rendered":"Pemilihan Penggerak dan Saiz Injap: Kaedah Pengiraan Kejuruteraan"},"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;\">Saiz Injap Kawalan dan Pemilihan Penggerak: Panduan Pengiraan Kejuruteraan Lengkap<\/h2>\n<p style=\"color: #e0e8f0; margin: 0; font-size: 16px;\">Pengiraan Master Cv, analisis tujahan dan saiz penggerak untuk aplikasi kawalan proses. Formula teknikal, contoh kerja dan kaedah pemilihan yang terbukti di lapangan.<\/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>Navigasi Pantas:<\/strong> <a style=\"color: #2d5a87; text-decoration: none;\" href=\"#cv-basics\">Asas CV<\/a> | <a style=\"color: #2d5a87; text-decoration: none;\" href=\"#liquid-cv\">CV Cecair<\/a> | <a style=\"color: #2d5a87; text-decoration: none;\" href=\"#gas-cv\">Gas CV<\/a> | <a style=\"color: #2d5a87; text-decoration: none;\" href=\"#steam-cv\">CV Wap<\/a> | <a style=\"color: #2d5a87; text-decoration: none;\" href=\"#actuator-thrust\">Tujahan Penggerak<\/a> | <a style=\"color: #2d5a87; text-decoration: none;\" href=\"#selection\">Panduan Pemilihan<\/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. Asas Pekali Aliran Injap Kawalan (Cv)<\/h3>\n<p>Yang <strong>pekali aliran Cv<\/strong> mengukur kapasiti injap kawalan untuk mengalirkan bendalir. Ditakrifkan pada keadaan standard: air 60\u00b0F dengan penurunan tekanan 1 psi, mengukur aliran dalam gelen AS seminit. Jurutera yang bekerja dengan <a style=\"color: #2d5a87; text-decoration: none; font-weight: 600;\" href=\"https:\/\/www.yunrui-controls.com\/ms\/brands\/fisher\/\">Penangkap ikan<\/a> dan jenama injap perindustrian lain bergantung pada pengiraan Cv yang tepat untuk saiz yang betul.<\/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>Definisi Piawai:<\/strong> Cv = Q \u00d7 \u221a(SG\/\u0394P)<\/p>\n<p style=\"margin: 8px 0 0 0; color: #475569; font-size: 14px;\">Di mana Q = kadar aliran (US gal\/min), SG = graviti tentu (air = 1.0), \u0394P = penurunan tekanan (psi)<\/p>\n<\/div>\n<h4 style=\"color: #2d5a87; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\">1.1 Penukaran Cv vs 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;\">Piawai<\/th>\n<th style=\"padding: 14px 12px; text-align: left; font-weight: 600;\">Syarat-syarat<\/th>\n<th style=\"padding: 14px 12px; text-align: left; font-weight: 600;\">Unit<\/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 (AS)<\/td>\n<td style=\"padding: 12px; border: 1px solid #e2e8f0;\">\u0394P = 1 psi, Air pada 60\u00b0F<\/td>\n<td style=\"padding: 12px; border: 1px solid #e2e8f0;\">US gal\/min<\/td>\n<\/tr>\n<tr style=\"background: #f8fafc;\">\n<td style=\"padding: 12px; border: 1px solid #e2e8f0; font-weight: 600;\">Kv (Metrik)<\/td>\n<td style=\"padding: 12px; border: 1px solid #e2e8f0;\">\u0394P = 1 bar, Air pada 5-30\u00b0C<\/td>\n<td style=\"padding: 12px; border: 1px solid #e2e8f0;\">m\u00b3\/j<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"margin-top: 15px;\"><strong>Penukaran:<\/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. Pengiraan CV Cecair<\/h3>\n<h4 style=\"color: #2d5a87; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\">2.1 Formula Asas (Aliran Tidak Tercekik)<\/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 Pembetulan Aliran Tercekik<\/h4>\n<p>Apabila penurunan tekanan melebihi nilai kritikal (risiko berkelip\/perongga):<\/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;\">Parameter<\/th>\n<th style=\"padding: 12px; text-align: left;\">Penerangan<\/th>\n<th style=\"padding: 12px; text-align: left;\">Nilai Lazim<\/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;\">Pekali pemulihan tekanan<\/td>\n<td style=\"padding: 10px; border: 1px solid #e2e8f0;\">0.85-0.95 (injap glob)<\/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;\">Faktor nisbah tekanan kritikal<\/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;\">Tekanan wap cecair (psia)<\/td>\n<td style=\"padding: 10px; border: 1px solid #e2e8f0;\">Bergantung pada bendalir<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4 style=\"color: #2d5a87; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\">2.3 Contoh yang Digunakan: Aplikasi Air<\/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;\">Syarat Proses:<\/p>\n<ul style=\"margin: 0; padding-left: 20px; color: #475569;\">\n<li>Sederhana: Air, SG = 1.0<\/li>\n<li>Kadar aliran: 100 gelen AS\/min<\/li>\n<li>Tekanan masuk: 100 psig<\/li>\n<li>Tekanan keluar: 80 psig<\/li>\n<li>Jenis injap: Injap globe, F<sub>L<\/sub> = 0.9<\/li>\n<\/ul>\n<p style=\"margin: 20px 0 10px 0; color: #1e3a5f; font-weight: 600;\">Pengiraan:<\/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>Periksa aliran tercekik: \u0394P<sub>kritikal<\/sub> = 0.9\u00b2 \u00d7 (114.7 \u2013 0.256) = 92.7 psi<\/li>\n<li>Oleh kerana 20 psi &lt; 92.7 psi \u2192 aliran tidak tercekik<\/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>Pemilihan:<\/strong> Pilih injap dengan Cv = 25-30 (1.2-1.5\u00d7 faktor keselamatan)<\/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. Pengiraan CV Gas<\/h3>\n<h4 style=\"color: #2d5a87; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\">3.1 Aliran Subkritikal (\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 Aliran Kritikal (\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>Di mana F<sub>k<\/sub> = k\/1.4 (pembetulan nisbah haba tentu)<\/p>\n<h4 style=\"color: #2d5a87; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\">3.3 Contoh yang Digunakan: Gas Asli<\/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;\">Syarat Proses:<\/p>\n<ul style=\"margin: 0; padding-left: 20px; color: #475569;\">\n<li>Sederhana: Gas asli, SG = 0.65<\/li>\n<li>Aliran: 5000 SCFH<\/li>\n<li>P\u2081 = 164.7 psia, P\u2082 = 114.7 psia<\/li>\n<li>Suhu: 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;\">Pengiraan:<\/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 subkritikal<\/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. Pengiraan CV Stim<\/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;\">Wap Tepu: 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;\">Wap Panas Lampau: Cv = W \/ (63.3 \u00d7 F<sub>sh<\/sub> \u00d7 \u221a(\u0394P \u00d7 \u03c1))<\/p>\n<\/div>\n<p>Di mana W = aliran jisim (lb\/j), \u03c1 = ketumpatan stim (lb\/ft\u00b3), F<sub>sh<\/sub> = pembetulan haba lampau (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. Pengiraan Tujahan Penggerak<\/h3>\n<h4 style=\"color: #2d5a87; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\">5.1 Penggerak Diafragma Pneumatik<\/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;\">Dengan spring: 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 Contoh yang Digunakan: Pengiraan Tujahan<\/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;\">Spesifikasi Penggerak:<\/p>\n<ul style=\"margin: 0; padding-left: 20px; color: #475569;\">\n<li>Diameter diafragma: 200 mm<\/li>\n<li>Isyarat: 20-100 kPa<\/li>\n<li>Kecekapan \u03b7: 0.85<\/li>\n<\/ul>\n<p style=\"margin: 20px 0 10px 0; color: #1e3a5f; font-weight: 600;\">Pengiraan:<\/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>maksimum<\/sub> = 100,000 \u00d7 0.0314 = 3140 U<\/li>\n<li>F<sub>keluaran<\/sub> = 3140 \u00d7 0.85 = <strong>2670 U<\/strong><\/li>\n<\/ol>\n<\/div>\n<h4 style=\"color: #2d5a87; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\">5.3 Keperluan Tork Injap<\/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;\">Jenis Injap<\/th>\n<th style=\"padding: 12px; text-align: left;\">Pekali Tork K<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 10px; border: 1px solid #e2e8f0;\">Injap bola<\/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;\">Injap rama-rama<\/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;\">Injap palam<\/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;\">Injap glob<\/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. Prosedur Pemilihan Penggerak<\/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;\">Faktor Keselamatan: SF = F<sub>tersedia<\/sub> \/ F<sub>diperlukan<\/sub> = 1.5 \u2013 2.0<\/p>\n<\/div>\n<h4 style=\"color: #2d5a87; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\">Senarai Semak Pemilihan:<\/h4>\n<ol style=\"padding-left: 20px; color: #475569; line-height: 1.8;\">\n<li>Tentukan jenis dan saiz injap daripada keperluan proses<\/li>\n<li>Kirakan Cv yang diperlukan untuk perkhidmatan cecair, gas atau wap<\/li>\n<li>Kira tork\/tujahan injap termasuk geseran pembungkusan<\/li>\n<li>Pilih jenis penggerak (pneumatik, elektrik, hidraulik)<\/li>\n<li>Sahkan output penggerak melebihi permintaan injap dengan faktor keselamatan<\/li>\n<li>Semak masa strok memenuhi keperluan tindak balas proses<\/li>\n<li>Tentukan kedudukan selamat gagal (buka-gagal, tutup-gagal, terakhir gagal)<\/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. Sumber Pemilihan Injap Fisher<\/h3>\n<p>Apabila menggunakan pengiraan ini untuk projek dunia sebenar, <a style=\"color: #2d5a87; text-decoration: none; font-weight: 600;\" href=\"https:\/\/www.yunrui-controls.com\/ms\/brands\/fisher\/\">Penangkap ikan<\/a> menawarkan perisian saiz injap yang komprehensif dan dokumentasi teknikal. Mereka <strong>Buku Panduan Injap Kawalan<\/strong> kekal sebagai rujukan industri untuk kaedah pengiraan Cv, analisis aliran tersekat dan ramalan hingar.<\/p>\n<p>Untuk aplikasi perkhidmatan yang teruk, <a style=\"color: #2d5a87; text-decoration: none; font-weight: 600;\" href=\"https:\/\/www.yunrui-controls.com\/ms\/brands\/fisher\/\">Fisher&#039;s<\/a> <strong>Cavitrol<\/strong> dan <strong>Bisikan<\/strong> Teknologi trim menangani cabaran penurunan tekanan tinggi dan hingar di luar pengiraan Cv asas. Menggandingkan trim khusus ini dengan saiz yang tepat memastikan kebolehpercayaan jangka panjang dalam keadaan proses yang mencabar.<\/p>\n<h3 style=\"color: #1e3a5f; font-size: 24px; margin-top: 40px; margin-bottom: 20px; border-bottom: 2px solid #e2e8f0; padding-bottom: 10px;\">8. Formula Rujukan Pantas<\/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;\">Permohonan<\/th>\n<th style=\"padding: 14px 12px; text-align: left; font-weight: 600;\">Formula<\/th>\n<th style=\"padding: 14px 12px; text-align: left; font-weight: 600;\">Unit<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 12px; border: 1px solid #e2e8f0; font-weight: 600;\">Cecair (tidak tercekik)<\/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;\">S: gpm AS, \u0394P: psi<\/td>\n<\/tr>\n<tr style=\"background: #f8fafc;\">\n<td style=\"padding: 12px; border: 1px solid #e2e8f0; font-weight: 600;\">Gas (subkritikal)<\/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;\">S: SCFH, T: \u00b0R<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 12px; border: 1px solid #e2e8f0; font-weight: 600;\">Wap tepu<\/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\/j, \u03c1: lb\/ft\u00b3<\/td>\n<\/tr>\n<tr style=\"background: #f8fafc;\">\n<td style=\"padding: 12px; border: 1px solid #e2e8f0; font-weight: 600;\">Tujahan penggerak<\/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;\">Tork injap<\/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;\">Perlukan Bantuan dengan Saiz Injap?<\/p>\n<p style=\"margin: 10px 0 0 0; color: #475569;\">YUNRUI membekalkan tulen <a style=\"color: #2d5a87; text-decoration: none; font-weight: 600;\" href=\"https:\/\/www.yunrui-controls.com\/ms\/brands\/fisher\/control-valves\/\">Injap kawalan Fisher<\/a>, penentu kedudukan dan penggerak untuk industri proses di seluruh dunia. Jurutera aplikasi kami boleh membantu dengan pemilihan injap, pengiraan Cv dan saiz penggerak untuk keadaan khusus anda.<\/p>\n<p style=\"margin: 15px 0 0 0; color: #475569;\">Hubungi kami di <a style=\"color: #2d5a87; text-decoration: none; font-weight: 600;\" href=\"mailto:sales@yunrui-controls.com\">sales@yunrui-controls.com<\/a> atau 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;\">Bacaan yang Disyorkan<\/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\/ms\/valve-positioner-working-principle-troubleshooting\/\">Panduan Lengkap Penentu Posisi Injap: Prinsip Kerja + Penyelesaian Masalah Lapangan<\/a><\/li>\n<li><a style=\"color: #2d5a87; text-decoration: none; font-weight: 500;\" href=\"https:\/\/www.yunrui-controls.com\/ms\/control-valve-accessories-guide\/\">Panduan Aksesori Injap Kawalan<\/a><\/li>\n<li><a style=\"color: #2d5a87; text-decoration: none; font-weight: 500;\" href=\"https:\/\/www.yunrui-controls.com\/ms\/fisher-dvc6200-positioners-emerson-ams-trex\/\">Penentu Posisi Fisher DVC6200: Konfigurasi dengan Emerson AMS Trex<\/a><\/li>\n<li><a style=\"color: #2d5a87; text-decoration: none; font-weight: 500;\" href=\"https:\/\/www.yunrui-controls.com\/ms\/control-valve-waterproof-and-moisture-proof-measures\/\">Langkah-langkah Kalis Air dan Kalis Lembapan Injap Kawalan: Panduan Perlindungan Industri Lengkap<\/a><\/li>\n<li><a style=\"color: #2d5a87; text-decoration: none; font-weight: 500;\" href=\"https:\/\/www.yunrui-controls.com\/ms\/transmitter-zero-migration-guide-positive-vs-negative-migration-explained\/\">Panduan Migrasi Sifar Pemancar: Penjelasan Migrasi Positif vs Negatif<\/a><\/li>\n<li><a style=\"color: #2d5a87; text-decoration: none; font-weight: 500;\" href=\"https:\/\/www.yunrui-controls.com\/ms\/radar-level-transmitter-frequency-guide\/\">Panduan Frekuensi Pemancar Aras Radar<\/a><\/li>\n<li><a style=\"color: #2d5a87; text-decoration: none; font-weight: 500;\" href=\"https:\/\/www.yunrui-controls.com\/ms\/temperature-transmitter-configuration-and-application-a-complete-technical-guide\/\">Konfigurasi dan Aplikasi Pemancar Suhu: Panduan Teknikal Lengkap<\/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>Kemas Kini Terakhir: Jun 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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Termasuk formula Cv untuk cecair, gas dan stim dengan contoh pengiraan yang telah diusahakan.","breadcrumb":{"@id":"https:\/\/www.yunrui-controls.com\/control-valve-cv-calculation-actuator-sizing\/#breadcrumb"},"inLanguage":"ms-MY","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.yunrui-controls.com\/control-valve-cv-calculation-actuator-sizing\/"]}]},{"@type":"ImageObject","inLanguage":"ms-MY","@id":"https:\/\/www.yunrui-controls.com\/control-valve-cv-calculation-actuator-sizing\/#primaryimage","url":"https:\/\/www.yunrui-controls.com\/wp-content\/uploads\/2026\/06\/0615.png","contentUrl":"https:\/\/www.yunrui-controls.com\/wp-content\/uploads\/2026\/06\/0615.png","width":332,"height":517,"caption":"Fisher FIELDVUE DVC6200 digital valve controller with HART protocol, LCD display, and pneumatic output. Genuine original instrument for control valve positioning and diagnostics. 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