{"id":8360,"date":"2026-06-04T17:41:23","date_gmt":"2026-06-04T17:41:23","guid":{"rendered":"https:\/\/www.yunrui-controls.com\/?p=8360"},"modified":"2026-06-04T17:41:23","modified_gmt":"2026-06-04T17:41:23","slug":"valve-stem-sealing-method","status":"publish","type":"post","link":"https:\/\/www.yunrui-controls.com\/vi\/valve-stem-sealing-method\/","title":{"rendered":"L\u1ef1a ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p l\u00e0m k\u00edn van ph\u00f9 h\u1ee3p"},"content":{"rendered":"<h2>Van ti\u1ebft l\u01b0u k\u00edn th\u00e2n van l\u00e0 g\u00ec?<\/h2>\n<p>Van \u0111i\u1ec1u khi\u1ec3n v\u00e0 van \u0111\u00f3ng m\u1edf th\u01b0\u1eddng thu\u1ed9c m\u1ed9t trong hai lo\u1ea1i sau: <strong>tuy\u1ebfn t\u00ednh<\/strong> ho\u1eb7c <strong>quay<\/strong>. Van tuy\u1ebfn t\u00ednh c\u00f3 m\u1ed9t tr\u1ee5c k\u00e9o d\u00e0i t\u1eeb th\u00e2n van, chuy\u1ec3n \u0111\u1ed9ng l\u00ean xu\u1ed1ng \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n van m\u1edf v\u00e0 \u0111\u00f3ng. Van quay c\u00f3 m\u1ed9t tr\u1ee5c \u0111\u01b0\u1ee3c n\u1ed1i v\u1edbi m\u1ed9t n\u00fat, \u0111\u0129a ho\u1eb7c bi. Khi tr\u1ee5c quay, n\u00f3 s\u1ebd m\u1edf v\u00e0 \u0111\u00f3ng van. Trong c\u1ea3 hai thi\u1ebft k\u1ebf, tr\u1ee5c chuy\u1ec3n \u0111\u1ed9ng b\u00ean trong th\u00e2n van v\u1edbi ma s\u00e1t t\u01b0\u01a1ng \u0111\u1ed1i th\u1ea5p \u0111\u1ed3ng th\u1eddi ti\u1ebfp x\u00fac v\u1edbi m\u00f4i ch\u1ea5t trong qu\u00e1 tr\u00ecnh.<\/p>\n<h2>\u0110o l\u01b0\u1eddng hi\u1ec7u su\u1ea5t gio\u0103ng ph\u1edbt tr\u1ee5c van<\/h2>\n<p>Ba ti\u00eau chu\u1ea9n c\u00f4ng nghi\u1ec7p ch\u00ednh d\u00f9ng \u0111\u1ec3 \u0111o \u0111\u1ed9 r\u00f2 r\u1ec9 c\u1ee7a tr\u1ee5c van: <strong>TA Luft<\/strong>, <strong>FCI 91-1<\/strong>, V\u00e0 <strong>ISO 15848<\/strong>. Tuy nhi\u00ean, m\u1ed7i ti\u00eau chu\u1ea9n l\u1ea1i kh\u00e1c bi\u1ec7t \u0111\u00e1ng k\u1ec3 v\u1ec1 hi\u1ec7u su\u1ea5t v\u00e0 ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m.<\/p>\n<p><strong>TA Luft<\/strong> \u0110\u00e2y l\u00e0 ti\u00eau chu\u1ea9n s\u1edbm nh\u1ea5t, cung c\u1ea5p c\u00e1c ti\u00eau ch\u00ed v\u1ec1 t\u1ed1c \u0111\u1ed9 r\u00f2 r\u1ec9 m\u00e0 kh\u00f4ng c\u00f3 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt chi ti\u1ebft \u0111\u1ec3 ph\u00e2n lo\u1ea1i c\u00e1c th\u00f4ng s\u1ed1 th\u1eed nghi\u1ec7m.<\/p>\n<p><strong>FCI 91-1<\/strong> Ti\u00eau chu\u1ea9n n\u00e0y ph\u00f9 h\u1ee3p h\u01a1n v\u1edbi ch\u01b0\u01a1ng tr\u00ecnh LDAR c\u1ee7a EPA v\u00e0 s\u1eed d\u1ee5ng Ph\u01b0\u01a1ng ph\u00e1p 21 c\u1ee7a EPA \u0111\u1ec3 &quot;ki\u1ec3m tra&quot; gio\u0103ng van v\u00e0 x\u00e1c \u0111\u1ecbnh t\u1ed1c \u0111\u1ed9 r\u00f2 r\u1ec9. Ti\u00eau chu\u1ea9n n\u00e0y cung c\u1ea5p c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra van v\u00e0 c\u00e1c x\u1ebfp h\u1ea1ng ph\u00e2n lo\u1ea1i kh\u00e1c nhau d\u1ef1a tr\u00ean t\u1ed1c \u0111\u1ed9 r\u00f2 r\u1ec9 \u1edf tr\u1ee5c van sau m\u1ed9t s\u1ed1 chu k\u1ef3 c\u01a1 h\u1ecdc v\u00e0 nhi\u1ec7t nh\u1ea5t \u0111\u1ecbnh.<\/p>\n<p><strong>ISO 15848<\/strong> Ti\u00eau chu\u1ea9n n\u00e0y bao g\u1ed3m ph\u1ea1m vi r\u1ed9ng h\u01a1n, ph\u00e2n lo\u1ea1i nhi\u1ec1u m\u1ee9c \u0111\u1ed9 r\u00f2 r\u1ec9 cho van \u0111i\u1ec1u khi\u1ec3n v\u00e0 van \u0111\u00f3ng m\u1edf d\u1ef1a tr\u00ean chu k\u1ef3 c\u01a1 h\u1ecdc, chu k\u1ef3 nhi\u1ec7t v\u00e0 k\u00edch th\u01b0\u1edbc tr\u1ee5c van. N\u00f3 cho ph\u00e9p th\u1eed nghi\u1ec7m v\u1edbi kh\u00ed heli ho\u1eb7c metan v\u00e0 quy \u0111\u1ecbnh c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ch\u00ednh x\u00e1c \u0111\u1ec3 \u0111o r\u00f2 r\u1ec9.<\/p>\n<div style=\"background: #f8f9fa; padding: 15px; border-left: 4px solid #0066cc; margin: 20px 0;\">\n<p style=\"margin: 0;\"><strong>Quan tr\u1ecdng:<\/strong> Khi so s\u00e1nh hi\u1ec7u su\u1ea5t l\u00e0m k\u00edn tr\u1ee5c van, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i x\u00e1c \u0111\u1ecbnh ti\u00eau chu\u1ea9n n\u00e0o \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 th\u1eed nghi\u1ec7m van. \u0110\u1ea1t \u0111\u01b0\u1ee3c t\u1ef7 l\u1ec7 r\u00f2 r\u1ec9 r\u1ea5t th\u1ea5p t\u01b0\u01a1ng \u0111\u1ed1i d\u1ec5 d\u00e0ng v\u1edbi s\u1ed1 chu k\u1ef3 c\u01a1 h\u1ecdc \u00edt h\u01a1n. Vi\u1ec7c duy tr\u00ec t\u1ef7 l\u1ec7 r\u00f2 r\u1ec9 r\u1ea5t th\u1ea5p tr\u1edf n\u00ean kh\u00f3 kh\u0103n h\u01a1n nhi\u1ec1u khi van tr\u1ea3i qua h\u00e0ng ngh\u00ecn chu k\u1ef3 c\u01a1 h\u1ecdc trong khi ch\u1ecbu t\u00e1c \u0111\u1ed9ng c\u1ee7a chu k\u1ef3 nhi\u1ec7t.<\/p>\n<\/div>\n<h2>Van \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 k\u00edn<\/h2>\n<p>H\u1ea7u h\u1ebft c\u00e1c van \u0111\u1ec1u s\u1eed d\u1ee5ng <strong>v\u00f2ng \u0111\u1ec7m k\u00edn PTFE ho\u1eb7c than ch\u00ec<\/strong> \u0110\u1ec3 l\u00e0m k\u00edn tr\u1ee5c van. S\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa gio\u0103ng l\u00e0m k\u00edn, m\u1eb7t b\u00edch gio\u0103ng l\u00e0m k\u00edn v\u00e0 bu l\u00f4ng n\u00e9n c\u00e1c v\u00f2ng l\u00e0m k\u00edn, \u0111\u1ea9y c\u00e1c v\u00f2ng l\u00e0m k\u00edn xu\u1ed1ng s\u00e1t tr\u1ee5c van. Thi\u1ebft k\u1ebf n\u00e0y cho ph\u00e9p tr\u1ee5c van chuy\u1ec3n \u0111\u1ed9ng trong khi ng\u0103n m\u00f4i ch\u1ea5t trong qu\u00e1 tr\u00ecnh tho\u00e1t ra ngo\u00e0i.<\/p>\n<p>\u0110\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c v\u00e0 duy tr\u00ec m\u1ee9c r\u00f2 r\u1ec9 th\u00e2n van th\u1ea5p, v\u1eadt li\u1ec7u \u0111\u00f3ng g\u00f3i c\u1ea7n s\u1eed d\u1ee5ng <strong>\u201cb\u1ed1c x\u1ebfp h\u00e0ng tr\u1ef1c ti\u1ebfp\u201d<\/strong> \u0110\u1ec3 duy tr\u00ec \u00e1p su\u1ea5t kh\u00f4ng \u0111\u1ed5i tr\u00ean c\u00e1c v\u00f2ng \u0111\u1ec7m. <a href=\"https:\/\/www.yunrui-controls.com\/vi\/brands\/fisher\/\">C\u1ee7a Fisher<\/a> <strong>Bao b\u00ec ENVIRO-SEAL\u2122<\/strong> Van s\u1eed d\u1ee5ng l\u00f2 xo \u0111\u0129a n\u00e9n \u0111\u1ec3 duy tr\u00ec \u00e1p su\u1ea5t kh\u00f4ng \u0111\u1ed5i tr\u00ean c\u00e1c v\u00f2ng \u0111\u1ec7m, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 k\u00edn kh\u00edt ngay c\u1ea3 sau khi chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a tr\u1ee5c van b\u1ecb m\u00f2n. Tuy nhi\u00ean, \u00e1p su\u1ea5t t\u0103ng l\u00ean c\u00f3 xu h\u01b0\u1edbng h\u1ea1n ch\u1ebf chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a van, do \u0111\u00f3 v\u1eadt li\u1ec7u l\u00e0m k\u00edn v\u00e0 \u0111\u1ed9 ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t tr\u1ee5c van ph\u1ea3i \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn c\u1ea9n th\u1eadn.<\/p>\n<h2>Van \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 k\u00edn ki\u1ec3u \u1ed1ng x\u1ebfp<\/h2>\n<p>M\u1ed9t l\u1ef1a ch\u1ecdn kh\u00e1c l\u00e0 <strong>van ni\u00eam phong d\u1ea1ng \u1ed1ng x\u1ebfp<\/strong>. H\u1ec7 th\u1ed1ng l\u00e0m k\u00edn b\u1eb1ng \u1ed1ng x\u1ebfp s\u1eed d\u1ee5ng m\u1ed9t l\u1edbp ch\u1eafn kim lo\u1ea1i \u0111\u01b0\u1ee3c h\u00e0n ho\u1eb7c t\u1ea1o h\u00ecnh b\u1eb1ng c\u01a1 h\u1ecdc xung quanh th\u00e2n van, c\u00f3 kh\u1ea3 n\u0103ng n\u00e9n v\u00e0 gi\u00e3n ra nh\u01b0 m\u1ed9t chi\u1ebfc \u0111\u00e0n accordion. H\u1ec7 th\u1ed1ng l\u00e0m k\u00edn b\u1eb1ng kim lo\u1ea1i ki\u1ec3u \u1ed1ng x\u1ebfp n\u00e0y \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u qu\u1ea3 nh\u01b0 mong mu\u1ed1n. <strong>kh\u00f4ng r\u00f2 r\u1ec9<\/strong>.<\/p>\n<p>C\u00e1c lo\u1ea1i gio\u0103ng x\u1ebfp s\u1eed d\u1ee5ng hai lo\u1ea1i ch\u00ednh:<\/p>\n<ul>\n<li><strong>\u1ed0ng th\u1ed5i b\u1eb1ng t\u1ea5m h\u00e0n<\/strong> \u2014 \u0110\u01b0\u1ee3c c\u1ea5u t\u1ea1o t\u1eeb m\u1ed9t ch\u1ed3ng c\u00e1c t\u1ea5m m\u1ecfng h\u00ecnh v\u00f2ng \u0111\u1ec7m \u0111\u01b0\u1ee3c h\u00e0n l\u1ea1i v\u1edbi nhau, t\u1ea1o ra nhi\u1ec1u n\u1ebfp g\u1ea5p trong m\u1ed9t chi\u1ec1u d\u00e0i nh\u1ea5t \u0111\u1ecbnh. Th\u00f4ng th\u01b0\u1eddng d\u00e0i b\u1eb1ng m\u1ed9t ph\u1ea7n ba chi\u1ec1u d\u00e0i c\u1ee7a \u1ed1ng th\u1ed5i \u0111\u1ecbnh h\u00ecnh.<\/li>\n<li><strong>\u1ed0ng th\u1ed5i \u0111\u1ecbnh h\u00ecnh<\/strong> \u2014 \u0110\u01b0\u1ee3c l\u00e0m t\u1eeb m\u1ed9t t\u1ea5m kim lo\u1ea1i ph\u1eb3ng \u0111\u01b0\u1ee3c u\u1ed1n cong v\u00e0 h\u00e0n th\u00e0nh m\u1ed9t \u1ed1ng c\u1ed1 \u0111\u1ecbnh b\u1eb1ng c\u01a1 h\u1ecdc. Th\u01b0\u1eddng c\u00f3 tu\u1ed5i th\u1ecd s\u1eed d\u1ee5ng l\u00e2u h\u01a1n.<\/li>\n<\/ul>\n<h2>So s\u00e1nh gi\u1eefa gio\u0103ng \u0111\u1ec7m v\u00e0 gio\u0103ng x\u1ebfp.<\/h2>\n<table style=\"width: 100%; border-collapse: collapse; margin: 20px 0;\">\n<thead>\n<tr style=\"background: #0066cc; color: white;\">\n<th style=\"padding: 12px; text-align: left; border: 1px solid #ddd;\">So s\u00e1nh<\/th>\n<th style=\"padding: 12px; text-align: left; border: 1px solid #ddd;\">Ni\u00eam phong \u0111\u00f3ng g\u00f3i<\/th>\n<th style=\"padding: 12px; text-align: left; border: 1px solid #ddd;\">Gio\u0103ng \u1ed1ng th\u1ed5i<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 12px; border: 1px solid #ddd;\"><strong>Tr\u1ecb gi\u00e1<\/strong><\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">Th\u1ea5p h\u01a1n<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">Cao h\u01a1n (t\u1ed5ng chi ph\u00ed s\u1edf h\u1eefu cao h\u01a1n nhi\u1ec1u)<\/td>\n<\/tr>\n<tr style=\"background: #f8f9fa;\">\n<td style=\"padding: 12px; border: 1px solid #ddd;\"><strong>T\u1ef7 l\u1ec7 r\u00f2 r\u1ec9<\/strong><\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">\u0110\u1ed9 r\u00f2 r\u1ec9 th\u1ea5p, kh\u00f4ng th\u1ec3 \u0111\u1ea1t m\u1ee9c kh\u00f4ng.<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">Kh\u00f4ng r\u00f2 r\u1ec9<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px; border: 1px solid #ddd;\"><strong>C\u00e1c t\u00f9y ch\u1ecdn v\u1eadt li\u1ec7u<\/strong><\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">C\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u v\u00e0 thi\u1ebft k\u1ebf \u0111\u00f3ng g\u00f3i kh\u00e1c nhau<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">C\u1ea5u tr\u00fac kim lo\u1ea1i, c\u00e1c l\u1edbp v\u00e0 \u0111\u1ed9 d\u00e0y th\u00e0nh xi lanh quy\u1ebft \u0111\u1ecbnh tu\u1ed5i th\u1ecd.<\/td>\n<\/tr>\n<tr style=\"background: #f8f9fa;\">\n<td style=\"padding: 12px; border: 1px solid #ddd;\"><strong>B\u1ea2O TR\u00cc<\/strong><\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">C\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh v\u00e0 thay th\u1ebf m\u00e0 kh\u00f4ng c\u1ea7n th\u00e1o r\u1eddi van.<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">Vi\u1ec7c s\u1eeda ch\u1eefa \u0111\u00f2i h\u1ecfi ph\u1ea3i th\u00e1o r\u1eddi ho\u00e0n to\u00e0n van.<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px; border: 1px solid #ddd;\"><strong>\u1ee8ng d\u1ee5ng<\/strong><\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">H\u1ea7u h\u1ebft c\u00e1c \u1ee9ng d\u1ee5ng th\u00f4ng th\u01b0\u1eddng<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">C\u00e1c d\u1ecbch v\u1ee5 \u0111\u1ed9c h\u1ea1i (n\u01a1i vi\u1ec7c kh\u00f4ng r\u00f2 r\u1ec9 l\u00e0 t\u1ed1i quan tr\u1ecdng)<\/td>\n<\/tr>\n<tr style=\"background: #f8f9fa;\">\n<td style=\"padding: 12px; border: 1px solid #ddd;\"><strong>D\u1ef1 \u0111o\u00e1n th\u1ea5t b\u1ea1i<\/strong><\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">C\u00e1c v\u1ebft r\u00f2 r\u1ec9 nh\u1ecf c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c kh\u1eafc ph\u1ee5c b\u1eb1ng c\u00e1ch si\u1ebft ch\u1eb7t.<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">Th\u1ea5t b\u1ea1i d\u1ec5 d\u1ef1 \u0111o\u00e1n h\u01a1n.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1ch ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p l\u00e0m k\u00edn van ph\u00f9 h\u1ee3p<\/h2>\n<p>M\u1ed7i ph\u01b0\u01a1ng ph\u00e1p l\u00e0m k\u00edn tr\u1ee5c van \u0111\u1ec1u c\u00f3 nh\u1eefng \u01b0u \u0111i\u1ec3m v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m ri\u00eang. C\u00e1ch ti\u1ebfp c\u1eadn l\u00fd t\u01b0\u1edfng l\u00e0 l\u1ef1a ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p l\u00e0m k\u00edn tr\u1ee5c van ph\u00f9 h\u1ee3p d\u1ef1a tr\u00ean y\u00eau c\u1ea7u th\u1ef1c t\u1ebf c\u1ee7a \u1ee9ng d\u1ee5ng.<\/p>\n<h3>Ch\u1ecdn lo\u1ea1i ni\u00eam phong \u0111\u00f3ng g\u00f3i khi:<\/h3>\n<ul>\n<li>C\u00f3 nh\u1eefng h\u1ea1n ch\u1ebf v\u1ec1 ng\u00e2n s\u00e1ch.<\/li>\n<li>D\u1ecbch v\u1ee5 chung, ph\u01b0\u01a1ng ti\u1ec7n truy\u1ec1n th\u00f4ng kh\u00f4ng \u0111\u1ed9c h\u1ea1i<\/li>\n<li>C\u1ea7n \u0111i\u1ec1u ch\u1ec9nh b\u1ea3o tr\u00ec th\u01b0\u1eddng xuy\u00ean.<\/li>\n<li>T\u1ef7 l\u1ec7 r\u00f2 r\u1ec9 th\u1ea5p \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u.<\/li>\n<\/ul>\n<h3>Ch\u1ecdn gio\u0103ng x\u1ebfp khi:<\/h3>\n<ul>\n<li>D\u1ecbch v\u1ee5 m\u00f4i tr\u01b0\u1eddng \u0111\u1ed9c h\u1ea1i ho\u1eb7c nguy hi\u1ec3m<\/li>\n<li>Kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p r\u00f2 r\u1ec9 ho\u00e0n to\u00e0n.<\/li>\n<li>Ki\u1ec3m so\u00e1t kh\u00ed th\u1ea3i m\u00f4i tr\u01b0\u1eddng nghi\u00eam ng\u1eb7t<\/li>\n<li>Chi ph\u00ed t\u1ed5n th\u1ea5t s\u1ea3n ph\u1ea9m r\u1ea5t cao.<\/li>\n<\/ul>\n<h2>Ph\u1ea7n k\u1ebft lu\u1eadn<\/h2>\n<p>Vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u00fang lo\u1ea1i gio\u0103ng l\u00e0m k\u00edn tr\u1ee5c van l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng trong quy tr\u00ecnh thi\u1ebft k\u1ebf van. Khi \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn ch\u00ednh x\u00e1c, thi\u1ebft k\u1ebf n\u00e0y s\u1ebd mang l\u1ea1i hi\u1ec7u su\u1ea5t l\u00e2u d\u00e0i \u0111\u00e1ng tin c\u1eady, gi\u1ea3m \u0111\u00e1ng k\u1ec3 l\u01b0\u1ee3ng kh\u00ed th\u1ea3i ra m\u00f4i tr\u01b0\u1eddng, t\u1ed5n th\u1ea5t s\u1ea3n ph\u1ea9m v\u00e0 chi ph\u00ed b\u1ea3o tr\u00ec.<\/p>\n<p>C\u00e1c t\u00f9y ch\u1ecdn thi\u1ebft k\u1ebf r\u1ea5t \u0111a d\u1ea1ng. Ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i n\u00ean tham kh\u1ea3o \u00fd ki\u1ebfn c\u1ee7a... <a href=\"https:\/\/www.yunrui-controls.com\/vi\/brands\/fisher\/\">nh\u00e0 cung c\u1ea5p van<\/a> \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh thi\u1ebft k\u1ebf gio\u0103ng l\u00fd t\u01b0\u1edfng, v\u1eadt li\u1ec7u c\u1ea5u t\u1ea1o v\u00e0 c\u00e1c chi ti\u1ebft c\u1ee5 th\u1ec3 kh\u00e1c cho \u1ee9ng d\u1ee5ng.<\/p>\n<hr \/>\n<h3>B\u00e0i \u0111\u1ecdc li\u00ean quan<\/h3>\n<ul>\n<li><a href=\"https:\/\/www.yunrui-controls.com\/vi\/fisher-fieldvue-4400-smart-position-transmitter\/\">B\u1ed9 ph\u00e1t t\u00edn hi\u1ec7u \u0111\u1ecbnh v\u1ecb th\u00f4ng minh Fisher FIELDVUE 4400: T\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt v\u00e0 h\u01b0\u1edbng d\u1eabn \u1ee9ng d\u1ee5ng.<\/a><\/li>\n<li><a href=\"https:\/\/www.yunrui-controls.com\/vi\/fisher-dvc6200-positioner-vibration-failure\/\">L\u1ed7i rung \u0111\u1ed9ng c\u1ee7a b\u1ed9 \u0111\u1ecbnh v\u1ecb Fisher DVC6200: Nghi\u00ean c\u1ee9u tr\u01b0\u1eddng h\u1ee3p v\u00e0 ph\u00e2n t\u00edch nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5<\/a><\/li>\n<li><a href=\"https:\/\/www.yunrui-controls.com\/vi\/fisher-rpack-series-packing-kits\/\">B\u1ed9 d\u1ee5ng c\u1ee5 \u0111\u00f3ng g\u00f3i d\u00f2ng Fisher RPACK: Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u00e0 l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u<\/a><\/li>\n<li><a href=\"https:\/\/www.yunrui-controls.com\/vi\/fisher-67cfr-and-67cfsr-filter-regulators\/\">B\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u00e1p su\u1ea5t l\u1ecdc Fisher 67CFR v\u00e0 67CFSR: Gi\u1ea3i ph\u00e1p cung c\u1ea5p kh\u00ed n\u00e9n hi\u1ec7u su\u1ea5t cao<\/a><\/li>\n<li><a href=\"https:\/\/www.yunrui-controls.com\/vi\/fisher-ez-series\/\">Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt van \u0111i\u1ec1u khi\u1ec3n m\u1ed9t ch\u1ed7 ng\u1ed3i d\u00f2ng Fisher EZ Series:<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>What is Valve Stem Sealing? Control valves and on-off valves typically fall into one of two categories: linear or rotary. Linear valves have a stem that extends from the valve body, rising and falling to drive the valve open and closed. Rotary valves have a stem connected to a plug, disc, or ball. When the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":8362,"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":[1],"tags":[523,524,525,521,522,498],"class_list":["post-8360","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blogs","tag-bellows-seal","tag-fisher-enviro-seal","tag-valve-leakage","tag-valve-stem-sealing","tag-packing-seal","tag-industrial-valves"],"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>Valve Stem Sealing Guide | Fisher Packing vs Bellows Seal<\/title>\n<meta name=\"description\" content=\"Compare valve stem sealing methods: packing seal vs bellows seal. 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