{"id":9253,"date":"2021-05-31T16:49:04","date_gmt":"2021-05-31T09:49:04","guid":{"rendered":"https:\/\/vn-tech.com.vn\/?p=9253"},"modified":"2023-10-12T14:02:03","modified_gmt":"2023-10-12T07:02:03","slug":"dinh-nghia-van-dieu-khien-trong-cong-nghiep","status":"publish","type":"post","link":"https:\/\/vn-tech.com.vn\/?p=9253","title":{"rendered":"\u0110\u1ecbnh ngh\u0129a van \u0111i\u1ec1u khi\u1ec3n trong c\u00f4ng nghi\u1ec7p"},"content":{"rendered":"<h4><strong>\u0110\u1ecbnh ngh\u0129a van \u0111i\u1ec1u khi\u1ec3n l\u00e0 g\u00ec?<\/strong><\/h4>\n<ul>\n<li><a href=\"https:\/\/vn-tech.com.vn\/\"><strong>Van \u0111i\u1ec1u khi\u1ec3n<\/strong><\/a> l\u00e0 m\u1ed9t lo\u1ea1i van c\u00f4ng nghi\u1ec7p. \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u trong c\u00e1c nh\u00e0 m\u00e1y s\u1ea3n xu\u1ea5t, ch\u1ebf bi\u1ebfn. Van \u0111\u01b0\u1ee3c \u0111\u00f3ng m\u1edf m\u1ed9t c\u00e1ch t\u1ef1 \u0111\u1ed9ng b\u1eb1ng \u0111i\u1ec7n ho\u1eb7c kh\u00ed n\u00e9n nh\u1edd v\u00e0o t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n. Van c\u00f3 th\u1ec3 nh\u1eadn t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n on\/off ho\u1eb7c t\u00edn hi\u1ec7u tuy\u1ebfn t\u00ednh theo t\u1ef7 l\u1ec7. V\u1edbi t\u00edn hi\u1ec7u tuy\u1ebfn t\u00ednh t\u1ef7 l\u1ec7 th\u00ec th\u00f4ng th\u01b0\u1eddng trong c\u00f4ng nghi\u1ec7p v\u00e0 t\u1ef1 \u0111\u1ed9ng h\u00f3a ch\u00fang ta v\u1eabn hay d\u00f9ng \u0111\u1ebfn t\u00edn hi\u1ec7u analog 4-20mA, 0-20mA, 0-10V, 1-5V\u2026 V\u1edbi t\u00ednh hi\u1ec7u analog s\u1ebd gi\u00fap van ho\u1ea1t \u0111\u1ed9ng theo t\u1ef7 l\u1ec7 kh\u00e1 nhuy\u1ec5n t\u1eeb 0-100% n\u00ean ch\u00fang ta c\u00f2n c\u00f3 th\u1ec3 g\u1ecdi l\u00e0 van t\u1ef7 l\u1ec7.<\/li>\n<\/ul>\n<p>Van \u0111i\u1ec1u khi\u1ec3n c\u00f3 nh\u1eefng lo\u1ea1i n\u00e0o?<\/p>\n<ul>\n<li>Van \u0111i\u1ec1u khi\u1ec3n th\u00f4ng th\u01b0\u1eddng c\u00f3 nhi\u1ec1u lo\u1ea1i. Nh\u01b0ng ti\u00eau bi\u1ec3u trong c\u00f4ng nghi\u1ec7p th\u01b0\u1eddng d\u00f9ng c\u00f3 m\u1ed9t s\u1ed1 lo\u1ea1i nh\u01b0 sau:<\/li>\n<\/ul>\n<p><strong>Van \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng kh\u00ed n\u00e9n.<\/strong><\/p>\n<ul>\n<li>Van \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n, k\u00edch \u0111\u1ed9ng ho\u00e0n to\u00e0n b\u1eb1ng kh\u00ed n\u00e9n theo d\u1ea1ng on\/off ho\u1eb7c tuy\u1ebfn t\u00ednh. V\u1edbi lo\u1ea1i van n\u00e0y th\u00ec c\u0169ng c\u00f3 nhi\u1ec1u \u01b0u \u0111i\u1ec3m v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m ri\u00eang c\u1ee7a n\u00f3. Nh\u01b0ng c\u00f3 m\u1ed9t v\u00e0i l\u01b0u \u00fd m\u1ecdi ng\u01b0\u1eddi c\u00f9ng tham kh\u1ea3o nh\u00e9.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-9313 size-full\" src=\"https:\/\/vn-tech.com.vn\/wp-content\/uploads\/2021\/05\/dinh-nghia-van-dieu-khien-trong-cong-nghiep.jpg\" alt=\"van \u0111i\u1ec1u khi\u1ec3n\" width=\"1123\" height=\"564\" srcset=\"https:\/\/vn-tech.com.vn\/wp-content\/uploads\/2021\/05\/dinh-nghia-van-dieu-khien-trong-cong-nghiep.jpg 1123w, https:\/\/vn-tech.com.vn\/wp-content\/uploads\/2021\/05\/dinh-nghia-van-dieu-khien-trong-cong-nghiep-300x151.jpg 300w, https:\/\/vn-tech.com.vn\/wp-content\/uploads\/2021\/05\/dinh-nghia-van-dieu-khien-trong-cong-nghiep-768x386.jpg 768w, https:\/\/vn-tech.com.vn\/wp-content\/uploads\/2021\/05\/dinh-nghia-van-dieu-khien-trong-cong-nghiep-1024x514.jpg 1024w, https:\/\/vn-tech.com.vn\/wp-content\/uploads\/2021\/05\/dinh-nghia-van-dieu-khien-trong-cong-nghiep-600x301.jpg 600w\" sizes=\"(max-width: 1123px) 100vw, 1123px\" \/><\/p>\n<h4><strong>L\u01b0u \u00fd cho ng\u01b0\u1eddi v\u1eadn h\u00e0nh, s\u1eed d\u1ee5ng<\/strong><\/h4>\n<ul>\n<li>Th\u01b0\u1eddng xuy\u00ean ki\u1ec3m tra \u0111\u1ed9 r\u00f2 r\u1ec9 van :Th\u01b0\u1eddng xuy\u00ean ki\u1ec3m tra \u0111\u1ed9 r\u00f2 r\u1ec9 van \u0111\u1ecbnh k\u1ef3. Vi\u1ec7c n\u00e0y r\u1ea5t quan tr\u1ecdng trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t \u0111\u1eb7c bi\u1ec7t l\u00e0 n\u00f3 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn s\u1ee9c kh\u1ecfe c\u1ee7a con ng\u01b0\u1eddi.<\/li>\n<li>Ki\u1ec3m tra \u00e1p su\u1ea5t l\u01b0u ch\u1ea5t tr\u01b0\u1edbc khi s\u1eed d\u1ee5ng: Ng\u01b0\u1eddi v\u1eadn h\u00e0nh, s\u1eed d\u1ee5ng n\u00ean ki\u1ec3m tra \u00e1p su\u1ea5t l\u01b0u ch\u1ea5t \u0111\u1ea7u v\u00e0o c\u1ee7a van \u0111i\u1ec1u khi\u1ec3n kh\u00ed n\u00e9n b\u1eb1ng c\u00e1ch l\u1eafp \u0111\u1eb7t th\u00eam \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t ho\u1eb7c c\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t tr\u00ean \u0111\u01b0\u1eddng \u1ed1ng m\u00e0 l\u01b0u ch\u1ea5t \u0111i qua tr\u01b0\u1edbc khi v\u00e0o van.<\/li>\n<li>Ki\u1ec3m tra \u00e1p su\u1ea5t kh\u00ed n\u00e9n \u0111i\u1ec1u khi\u1ec3n cho van : Th\u00f4ng th\u01b0\u1eddng t\u1ea5t c\u1ea3 c\u00e1c h\u00e3ng van \u0111i\u1ec1u khi\u1ec3n kh\u00ed n\u00e9n \u0111\u1ec1u ph\u1ea3i c\u00f3 \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t \u0111\u1ec3 ki\u1ec3m tra \u00e1p su\u1ea5t \u0111i\u1ec1u khi\u1ec3n c\u1ee7a kh\u00ed n\u00e9n tr\u01b0\u1edbc khi v\u00e0o van. V\u00ec \u0111a s\u1ed1 m\u00e0ng van c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c h\u00e3ng ch\u1ec9 ch\u1ecbu \u0111\u01b0\u1ee3c \u00e1p su\u1ea5t t\u1ed1i \u0111a l\u00e0 6 bar. Tuy nhi\u00ean v\u1edbi m\u1ed9t s\u1ed1 h\u00e3ng c\u1ee7a China, Taiwan th\u00ec van s\u1ebd kh\u00f4ng c\u00f3 th\u00eam \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t v\u00ec l\u00fd do gi\u1ea3m chi ph\u00ed ho\u1eb7c m\u1ed9t s\u1ed1 l\u00fd do ri\u00eang kh\u00e1c. V\u1edbi nh\u1eefng h\u00e3ng n\u00e0y th\u00ec ng\u01b0\u1eddi v\u1eadn h\u00e0nh ho\u1eb7c ng\u01b0\u1eddi mua van n\u00ean y\u00eau c\u1ea7u option th\u00eam ph\u1ea7n \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t n\u00e0y. V\u00ec kh\u00e1 quan tr\u1ecdng cho vi\u1ec7c \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng van. Ho\u1eb7c v\u1edbi m\u1ed9t s\u1ed1 nh\u00e0 m\u00e1y l\u1edbn c\u1ee7a M\u1ef9 h\u1ecd s\u1ebd m\u1eb7c \u0111\u1ecbnh kh\u00f4ng s\u1eed d\u1ee5ng van \u0111i\u1ec1u khi\u1ec3n kh\u00ed n\u00e9n c\u1ee7a c\u00e1c h\u00e3ng n\u1ebfu ko c\u00f3 \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t m\u1eb7c \u0111\u1ecbnh (standard) cho van.<\/li>\n<li>Ki\u1ec3m tra nhi\u1ec7t \u0111\u1ed9 l\u01b0u ch\u1ea5t v\u00e0 nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng: V\u1ea5n \u0111\u1ec1 v\u1ec1 nhi\u1ec7t \u0111\u1ed9 t\u01b0\u1edfng ch\u1eebng nh\u01b0 kh\u00f4ng \u1ea3nh h\u01b0\u1edfng v\u00e0 kh\u00f4ng quan trong trong vi\u1ec7c v\u1eadn h\u00e0nh v\u00e0 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a van \u0111i\u1ec1u khi\u1ec3n kh\u00ed n\u00e9n tuy nhi\u00ean \u0111\u00f3 l\u00e0 c\u00e1ch suy ngh\u0129 c\u00f3 ph\u1ea7n kh\u00f4ng \u0111\u00fang. V\u00ec khi nhi\u1ec7t \u0111\u1ed9 l\u01b0u ch\u1ea5t kh\u00f4ng \u0111\u00fang v\u1edbi quy c\u00e1ch c\u1ee7a van s\u1ebd d\u1eabn \u0111\u1ebfn vi\u1ec7c h\u01b0 h\u1ecfng n\u1eb7ng h\u01a1n s\u1ebd g\u00e2y ch\u00e1y n\u1ed5 v\u00e0 m\u1ea5t an to\u00e0n cho ng\u01b0\u1eddi v\u1eadn h\u00e0nh. V\u1edbi nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng kh\u00f4ng \u0111\u00fang quy c\u00e1ch th\u00ec c\u0169ng \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp l\u00ean van, r\u1ea5t nhi\u1ec1u h\u01b0 h\u1ecfng cho van.<\/li>\n<\/ul>\n<h4><strong>L\u01b0u \u00fd khi ch\u1ecdn van \u0111i\u1ec1u khi\u1ec3n kh\u00ed n\u00e9n:<\/strong><\/h4>\n<p>M\u1ed9t s\u1ed1 l\u01b0u \u00fd quan tr\u1ecdng nh\u1ea5t khi ch\u1ecdn van \u0111i\u1ec1u khi\u1ec3n kh\u00ed n\u00e9n m\u00e0 ch\u1eafc h\u1eb3n nh\u00e2n vi\u00ean b\u00e1n van \u0111i\u1ec1u khi\u1ec3n kh\u00ed n\u00e9n n\u00e0o c\u0169ng c\u1ea7n ph\u1ea3i bi\u1ebft \u0111\u1ec3 ch\u1ecdn cho kh\u00e1ch h\u00e0ng m\u1ed9t van \u0111\u00fang t\u00ednh n\u0103ng k\u1ef9 thu\u1eadt nh\u01b0ng v\u1eabn \u0111\u00e3m b\u1ea3o \u0111\u01b0\u1ee3c v\u1ea5n \u0111\u1ec1 gi\u00e1 c\u1ea3 cho kh\u00e1ch h\u00e0ng<\/p>\n<ul>\n<li>Lo\u1ea1i van \u0111i\u1ec1u khi\u1ec3n \u0111\u1ec3 t\u01b0 v\u1ea5n cho ng\u01b0\u1eddi d\u00f9ng:\n<ul>\n<li>Van c\u00f3 nhi\u1ec1u lo\u1ea1i t\u00f9y thu\u1ed9c v\u00e0o \u1ee9ng d\u1ee5ng m\u00e0 l\u01b0u ch\u1ea5t \u0111\u1ec3 ch\u1ecdn ra lo\u1ea1i van ph\u00f9 h\u1ee3p nh\u1ea5t (Van b\u01b0\u1edbm, van c\u1ea7u, van bi, van c\u1ed5ng\u2026)<\/li>\n<li>Van th\u01b0\u1eddng \u0111\u00f3ng hay van th\u01b0\u1eddng m\u1edf.T\u00f9y v\u00e0o y\u00eau c\u1ea7u c\u0169ng nh\u01b0 t\u00ednh n\u0103ng, \u1ee9ng d\u1ee5ng c\u1ee7a l\u01b0u ch\u1ea5t m\u00e0 ch\u1ecdn van \u0111i\u1ec1u khi\u1ec3n kh\u00ed n\u00e9n cho kh\u00e1ch h\u00e0ng. Van \u0111i\u1ec1u khi\u1ec3n kh\u00ed n\u00e9n r\u1ea5t kh\u00e1c so v\u1edbi van \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n \u1edf \u0111\u1eb7c \u0111i\u1ec3m n\u00e0y v\u00ec c\u00f3 ph\u00e2n bi\u1ec7t ra th\u01b0\u1eddng \u0111\u00f3ng v\u00e0 th\u01b0\u1eddng m\u1edf.L\u1ef1c \u0111\u00f3ng van \u0111i\u1ec1u khi\u1ec3n kh\u00ed n\u00e9n:<\/li>\n<\/ul>\n<\/li>\n<li>L\u1ef1c \u0111\u00f3ng van r\u1ea5t quan trong cho van v\u00ec n\u1ebfu ch\u1ecdn thi\u1ebfu l\u1ef1c \u0111\u00f3ng van s\u1ebd d\u1eabn \u0111\u1ebfn tr\u01b0\u1eddng h\u1ee3p van \u0111\u00f3ng kh\u00f4ng k\u00edn (\u0111\u00f3ng ko \u0111\u01b0\u1ee3c ho\u00e0n to\u00e0n 100%) d\u1eabn \u0111\u1ebfn b\u1ecb r\u00f2 r\u1ec9 ho\u1eb7c n\u1ebfu nh\u01b0 ch\u1ecdn l\u1ef1c \u0111\u00f3ng van qu\u00e1 d\u01b0 th\u00ec d\u1eabn \u0111\u1ebfn vi\u1ec7c gi\u00e1 th\u00e0nh van b\u1ecb m\u1eafc l\u00ean l\u00e0m m\u1ea5t \u0111i t\u00ednh kinh t\u1ebf cho van.<\/li>\n<li>Nhi\u1ec7t \u0111\u1ed9 l\u01b0u ch\u1ea5t.<\/li>\n<li>L\u01b0u ch\u1ea5t l\u00e0 g\u00ec ?<\/li>\n<\/ul>\n<p><a href=\"https:\/\/vn-tech.com.vn\/van-va-phu-kien\"><strong><u>Van \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng \u0111i\u1ec7n:<\/u><\/strong><\/a><\/p>\n<ul>\n<li>Van \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n v\u00e0 k\u00edch \u0111\u1ed9ng ho\u00e0n to\u00e0n b\u1eb1ng \u0111i\u1ec7n. Th\u00f4ng th\u01b0\u1eddng l\u00e0 b\u1ed9 ph\u1eadn actuator s\u1ebd \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t m\u1ed9t \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n (AC ho\u1eb7c DC). \u0110\u1ed9ng c\u01a1 c\u0169ng c\u00f3 2 d\u1ea1ng \u0111i\u1ec1u khi\u1ec3n l\u00e0 tuy\u1ebfn t\u00ednh (T\u1ef7 l\u1ec7) theo t\u00edn hi\u1ec7u nh\u1eadn l\u00e0 analog v\u00e0 d\u1ea1ng \u0111\u00f3ng m\u1edf on\/off.<\/li>\n<\/ul>\n<p><strong>M\u1ed9t s\u1ed1 l\u01b0u \u00fd v\u1ec1 van \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng \u0111i\u1ec7n khi ch\u1ecdn van:<\/strong><\/p>\n<ol>\n<li>K\u00edch th\u01b0\u1edbc van (DN).<\/li>\n<li>\u00c1p su\u1ea5t c\u1ee7a van (PN) : \u00c1p su\u1ea5t c\u1ee7a Van hay c\u00f2n g\u1ecdi l\u00e0 \u00e1p su\u1ea5t ch\u1ecbu \u0111\u1ef1ng c\u1ee7a van. \u0110a s\u1ed1 ng\u01b0\u1eddi d\u00f9ng th\u01b0\u1eddng hay d\u00f9ng t\u1eeb PN \u0111\u1ec3 ch\u1ec9 v\u1ec1 t\u00ednh n\u0103ng n\u00e0y. Th\u00f4ng th\u01b0\u1eddng l\u00e0 PN10\/PN16\/PN25\/PN40\/PN63\/PN100\u2026.<\/li>\n<li>\u00c1p su\u1ea5t \u0111\u00f3ng van \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n: \u00c1p su\u1ea5t \u0111\u00f3ng van hay c\u00f2n g\u1ecdi l\u00e0 l\u1ef1c \u0111\u00f3ng van ho\u1eb7c closing pressure. Tuy nhi\u00ean c\u00f3 m\u1ed9t th\u00f4ng s\u1ed1 m\u00e0 t\u1ea5t c\u1ea3 c\u00e1c h\u00e3ng s\u1ea3n xu\u1ea5t van th\u01b0\u1eddng d\u00f9ng l\u00e0 Delta P (\u0394P). \u0110\u00e2y l\u00e0 l\u1ef1c ch\u00eanh \u00e1p gi\u1eefa \u00e1p su\u1ea5t ng\u00f5 v\u00e0o v\u00e0 ng\u00f5 ra c\u1ee7a van. D\u1ef1a v\u00e0o \u00e1p su\u1ea5t n\u00e0y m\u00e0 ch\u00fang ta c\u00f3 th\u1ec3 ch\u1ecdn l\u1ef1c \u0111\u00f3ng c\u1ee7a actuator cho van.<\/li>\n<li>\u00c1p su\u1ea5t \u0111\u1ea7u v\u00e0o v\u00e0 \u00e1p su\u1ea5t \u0111\u1ea7u ra c\u1ee7a van: Vi\u1ec7c x\u00e1c \u0111\u1ecbnh \u00e1p su\u1ea5t v\u00e0o, \u00e1p su\u1ea5t ra van \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n l\u00e0 c\u00f4ng vi\u1ec7c kh\u00e1 quan trong.<\/li>\n<li>L\u01b0u ch\u1ea5t l\u00e0m vi\u1ec7c c\u1ee7a van \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n. T\u00f9y thu\u1ed9c v\u00e0o t\u00ednh n\u0103ng v\u1eadt l\u00fd, h\u00f3a h\u1ecdc c\u1ee7a l\u01b0u ch\u1ea5t c\u0169ng nh\u01b0 \u0103n m\u00f2n, kh\u00f4ng \u0103n m\u00f2n, gi\u00e3n n\u1edf\u2026 m\u00e0 ch\u00fang ta l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u ch\u1ebf t\u1ea1o cho c\u00e1c th\u00e0nh ph\u1ea7n c\u1ee7a van cho ph\u00f9 h\u1ee3p. \u0110\u00e2y \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t trong nh\u1eefng c\u00f4ng vi\u1ec7c quan tr\u1ecdng nh\u1ea5t v\u00ec n\u00f3 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 tu\u1ed5i th\u1ecd c\u1ee7a van \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n.<\/li>\n<li>L\u01b0u l\u01b0\u1ee3ng s\u1eed d\u1ee5ng. Ph\u1ea7n n\u00e0y th\u00ec c\u00f3 l\u01b0u l\u01b0\u1ee3ng Max, l\u01b0u l\u01b0\u1ee3ng Min v\u00e0 l\u01b0u l\u01b0\u1ee3ng trung b\u00ecnh.<\/li>\n<li>Nhi\u1ec7t \u0111\u1ed9 l\u01b0u ch\u1ea5t.<\/li>\n<li>\u0110i\u1ec7n \u00e1p s\u1eed d\u1ee5ng c\u1ee7a van.<\/li>\n<li>Lo\u1ea1i van d\u00f9ng \u0111\u00f3ng m\u1edf on\/off hay \u0111\u00f3ng m\u1edf tuy\u1ebfn t\u00ednh (van t\u1ef7 l\u1ec7)<\/li>\n<li>N\u1ebfu l\u00e0 van tuy\u1ebfn t\u00ednh th\u00ec c\u1ea7n x\u00e1c \u0111\u1ecbnh t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n van l\u00e0 t\u00edn hi\u1ec7u g\u00ec?<\/li>\n<\/ol>\n<h4><strong><a href=\"https:\/\/www.kfm-regelungstechnik.de\/en\" target=\"_blank\" rel=\"noopener\">Van \u0111i\u1ec1u khi\u1ec3n tuy\u1ebfn t\u00ednh<\/a> \u2013 van \u0111i\u1ec1u khi\u1ec3n on\/off<\/strong><\/h4>\n<ul>\n<li>Van \u0111i\u1ec1u khi\u1ec3n tuy\u1ebfn t\u00ednh l\u00e0 lo\u1ea1i van c\u00f3 th\u1ec3 nh\u1eadn \u0111\u01b0\u1ee3c t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n analog nh\u1edd v\u00e0o b\u1ed9 positioner gi\u00fap van ch\u1ea1y m\u1ed9t c\u00e1ch tuy\u1ebfn t\u00ednh theo t\u1ef7 l\u1ec7 0-100%. Van tuy\u1ebfn t\u00ednh \u0111\u01b0\u1ee3c d\u00f9ng r\u1ea5t nhi\u1ec1u trong c\u00e1c nh\u00e0 m\u00e1y s\u1ea3n xu\u1ea5t c\u00f4ng nghi\u1ec7p.<\/li>\n<li>Van \u0111i\u1ec1u khi\u1ec3n on\/off s\u1ebd kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c t\u00edn hi\u1ec7u analog v\u00ec kh\u00f4ng \u0111\u01b0\u1ee3c trang b\u1ecb b\u1ed9 positioner ch\u00ednh v\u00ec th\u1ebf van on\/off s\u1ebd ch\u1eafc ch\u1eafn kh\u00f4ng ch\u1ea1y theo t\u1ef7 l\u1ec7 \u0111\u01b0\u1ee3c.<\/li>\n<\/ul>\n<div dir=\"auto\">\u2014\u2014\u2013<\/div>\n<div dir=\"auto\"><strong><a href=\"https:\/\/vntechgroup.com.vn\/\" target=\"_blank\" rel=\"noopener\">VNTECH GROUP<\/a>\u00a0\u2013 Your Partner For Automation, Instrumentation &amp; Industrial Valves<\/strong><\/div>\n<div dir=\"auto\">Hotline: 0918 113 733<\/div>\n<div dir=\"auto\">Email: info@vntechgroup.com.vn<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u0110\u1ecbnh ngh\u0129a van \u0111i\u1ec1u khi\u1ec3n l\u00e0 g\u00ec? Van \u0111i\u1ec1u khi\u1ec3n l\u00e0 m\u1ed9t lo\u1ea1i van c\u00f4ng nghi\u1ec7p. \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u trong c\u00e1c nh\u00e0 m\u00e1y s\u1ea3n xu\u1ea5t, ch\u1ebf bi\u1ebfn. Van \u0111\u01b0\u1ee3c \u0111\u00f3ng m\u1edf m\u1ed9t c\u00e1ch t\u1ef1 \u0111\u1ed9ng b\u1eb1ng \u0111i\u1ec7n ho\u1eb7c kh\u00ed n\u00e9n nh\u1edd v\u00e0o t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n. Van c\u00f3 th\u1ec3 nh\u1eadn t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n &#8230; <a title=\"\u0110\u1ecbnh ngh\u0129a van \u0111i\u1ec1u khi\u1ec3n trong c\u00f4ng nghi\u1ec7p\" class=\"read-more\" href=\"https:\/\/vn-tech.com.vn\/?p=9253\" aria-label=\"More on \u0110\u1ecbnh ngh\u0129a van \u0111i\u1ec1u khi\u1ec3n trong c\u00f4ng nghi\u1ec7p\">\u0110\u1ecdc ti\u1ebfp<\/a><\/p>\n","protected":false},"author":8,"featured_media":18510,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[229],"tags":[4980,4984,4982,4924],"class_list":["post-9253","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc","tag-van-dieu-khien","tag-van-dieu-khien-khi-nen","tag-van-dieu-khien-on-off","tag-van-dieu-khien-tuyen-tinh"],"lang":"vi","translations":{"vi":9253,"en":13489},"pll_sync_post":[],"_links":{"self":[{"href":"https:\/\/vn-tech.com.vn\/index.php?rest_route=\/wp\/v2\/posts\/9253"}],"collection":[{"href":"https:\/\/vn-tech.com.vn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vn-tech.com.vn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vn-tech.com.vn\/index.php?rest_route=\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/vn-tech.com.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9253"}],"version-history":[{"count":8,"href":"https:\/\/vn-tech.com.vn\/index.php?rest_route=\/wp\/v2\/posts\/9253\/revisions"}],"predecessor-version":[{"id":18375,"href":"https:\/\/vn-tech.com.vn\/index.php?rest_route=\/wp\/v2\/posts\/9253\/revisions\/18375"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vn-tech.com.vn\/index.php?rest_route=\/wp\/v2\/media\/18510"}],"wp:attachment":[{"href":"https:\/\/vn-tech.com.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9253"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vn-tech.com.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9253"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vn-tech.com.vn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9253"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}