{"id":3854,"date":"2025-10-17T09:27:47","date_gmt":"2025-10-17T01:27:47","guid":{"rendered":"https:\/\/ballvalves.tw\/?post_type=product&#038;p=3854"},"modified":"2026-09-16T20:56:37","modified_gmt":"2026-09-16T12:56:37","slug":"%d9%85%d9%81%d8%aa%d8%a7%d8%ad-%d8%b5%d8%ba%d9%8a%d8%b1","status":"publish","type":"product","link":"https:\/\/ballvalves.tw\/ar\/product\/micro-switch\/","title":{"rendered":"Valve Limit Switch Box \u2014 NAMUR Mount, 2 SPDT Switches, Open\/Closed Indicator, IP67"},"content":{"rendered":"<h2>\u0648\u0635\u0641 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n<p>Automation only works if you can verify it. This <strong>\u0635\u0646\u062f\u0648\u0642 \u0645\u0641\u062a\u0627\u062d \u0627\u0644\u062d\u062f<\/strong> tells you \u2014 and your control system \u2014 whether a valve is actually open or closed. It mounts on top of the pneumatic actuator and houses <strong>two SPDT mechanical limit switches<\/strong> that trip as the valve reaches each end position, sending an electrical signal back to the control room. A dome indicator on top shows open or closed to anyone standing at the valve.<\/p>\n<p>If a valve fails to reach its position, the switch does not send its signal, and your system can raise an alarm before the fault causes a problem. That makes it a component you rely on for process safety, not just convenience.<\/p>\n<h2>What It Does<\/h2>\n<ul>\n<li><strong>Position feedback:<\/strong> confirms open or closed status to the control room for remote monitoring.<\/li>\n<li><strong>Safety interlocks:<\/strong> lets the system block an action \u2014 like starting a pump \u2014 until a valve is in the right position.<\/li>\n<li><strong>Fault detection:<\/strong> a missing signal flags a valve that is stuck or has failed to move.<\/li>\n<\/ul>\n<h2>\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n<table style=\"width:100%;border-collapse:collapse\">\n<tbody>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;text-align:left;width:38%\">Switch type<\/th>\n<td style=\"border:1px solid #ddd;padding:8px\">2 \u00d7 SPDT mechanical limit switches<\/td>\n<\/tr>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;text-align:left\">Contact rating<\/th>\n<td style=\"border:1px solid #ddd;padding:8px\">AC 250 V 16 A, 125 V 16 A \/ DC 250 V 0.3 A, 125 V 0.6 A, 30 V 10 A<\/td>\n<\/tr>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;text-align:left\">Enclosure<\/th>\n<td style=\"border:1px solid #ddd;padding:8px\">IP67<\/td>\n<\/tr>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;text-align:left\">Position indicator<\/th>\n<td style=\"border:1px solid #ddd;padding:8px\">Open \/ closed dome indicator on top<\/td>\n<\/tr>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;text-align:left\">\u0627\u0644\u0648\u0638\u064a\u0641\u0629<\/th>\n<td style=\"border:1px solid #ddd;padding:8px\">Open \/ closed position feedback<\/td>\n<\/tr>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;text-align:left\">\u0627\u0644\u062a\u0631\u0643\u064a\u0628<\/th>\n<td style=\"border:1px solid #ddd;padding:8px\">NAMUR standard, on top of the pneumatic actuator<\/td>\n<\/tr>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;text-align:left\">Fit<\/th>\n<td style=\"border:1px solid #ddd;padding:8px\">Any NAMUR-compatible pneumatic actuator \u2014 tell us your actuator when ordering<\/td>\n<\/tr>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;text-align:left\">\u0648\u062d\u062f\u0629 \u0627\u0644\u062a\u062e\u0632\u064a\u0646<\/th>\n<td style=\"border:1px solid #ddd;padding:8px\">LSB-01<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Why NAMUR Mounting Matters<\/h2>\n<p>Because the box follows the NAMUR standard, it is not tied to one actuator brand. The same switch box drops onto any NAMUR-compatible pneumatic actuator, so you can standardize on one position-feedback part across a plant instead of stocking a different unit for every actuator.<\/p>\n<h2>\u0623\u064a\u0646 \u064a\u064f\u0633\u062a\u062e\u062f\u0645<\/h2>\n<ul>\n<li><strong>PLC \/ DCS position feedback<\/strong> \u2014 the open and closed signals go straight to the plant control system, so operators see valve status without walking to the line.<\/li>\n<li><strong>Automated valve packages<\/strong> \u2014 pneumatic actuator, <a href=\"https:\/\/ballvalves.tw\/ar\/%d8%a7%d9%84%d9%85%d9%86%d8%aa%d8%ac\/%d8%b5%d9%85%d8%a7%d9%85-%d8%a7%d9%84%d9%85%d9%84%d9%81-%d8%a7%d9%84%d9%84%d9%88%d9%84%d8%a8%d9%8a\/\">\u0635\u0645\u0627\u0645 \u0627\u0644\u0645\u0644\u0641 \u0627\u0644\u0644\u0648\u0644\u0628\u064a NAMUR<\/a> and this switch box assemble on one NAMUR interface into a complete automated valve.<\/li>\n<li><strong>Safety interlocks<\/strong> \u2014 downstream equipment such as a pump or heater is held until the switch confirms the valve is in the right position.<\/li>\n<li><strong>Water and wastewater treatment<\/strong> \u2014 remote status on the many valves spread across a treatment plant.<\/li>\n<li><strong>Chemical and process plants<\/strong> \u2014 position feedback on process lines that need automated, traceable valve operation.<\/li>\n<\/ul>\n<h2>Related Automation Parts<\/h2>\n<table style=\"width:100%;border-collapse:collapse\">\n<thead>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;text-align:left\">\u062c\u0632\u0621<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;text-align:left\">Use it for<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px\"><strong>Limit switch box (this page)<\/strong><\/td>\n<td style=\"border:1px solid #ddd;padding:8px\">Reporting valve open\/closed position back to the control system.<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px\"><a href=\"https:\/\/ballvalves.tw\/ar\/%d8%a7%d9%84%d9%85%d9%86%d8%aa%d8%ac\/%d8%b5%d9%85%d8%a7%d9%85-%d8%a7%d9%84%d9%85%d9%84%d9%81-%d8%a7%d9%84%d9%84%d9%88%d9%84%d8%a8%d9%8a\/\">\u0635\u0645\u0627\u0645 \u0627\u0644\u0645\u0644\u0641 \u0627\u0644\u0644\u0648\u0644\u0628\u064a NAMUR<\/a><\/td>\n<td style=\"border:1px solid #ddd;padding:8px\">The pilot that drives a pneumatic actuator.<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px\"><a href=\"https:\/\/ballvalves.tw\/ar\/%d8%a7%d9%84%d9%85%d9%86%d8%aa%d8%ac\/%d9%88%d8%b5%d9%84%d8%a9-%d9%82%d9%88%d8%b3%d9%8a%d8%a9\/\">Bracket &amp; linkage<\/a><\/td>\n<td style=\"border:1px solid #ddd;padding:8px\">Mounting an actuator to the valve in the first place.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u0627\u0644\u0634\u0627\u0626\u0639\u0629<\/h2>\n<h3>What does a valve limit switch box do?<\/h3>\n<p>It reports the valve&#8217;s position. Mechanical switches inside trip when the valve reaches its open or closed end position and send an electrical signal to your control system, so you know the valve&#8217;s status without standing next to it.<\/p>\n<h3>Is it NAMUR standard?<\/h3>\n<p>Yes. It mounts to the NAMUR standard on top of the actuator, so it fits any NAMUR-compatible pneumatic actuator rather than one specific brand.<\/p>\n<h3>What type of switches does it use?<\/h3>\n<p>Two SPDT mechanical limit switches, one for open and one for closed. They trip on contact as the valve reaches each end position. Contact rating is AC 250 V 16 A and DC 30 V 10 A, and the enclosure is IP67.<\/p>\n<h3>Why is position feedback important?<\/h3>\n<p>Automation assumes a valve moved when commanded. The switch box verifies it actually did. If the signal is missing, the control system can raise an alarm or hold an interlock before a mis-positioned valve causes a problem.<\/p>\n<h3>Which actuators does it fit?<\/h3>\n<p>Any NAMUR-compatible pneumatic actuator. Tell us the actuator you are using so we can confirm the fit.<\/p>\n<h3>\u0643\u064a\u0641 \u064a\u0645\u0643\u0646\u0646\u064a \u0645\u0639\u0631\u0641\u0629 \u0627\u0644\u0633\u0639\u0631\u061f<\/h3>\n<p>Send us your actuator details and the quantity. We reply to every inquiry within 24 hours.<\/p>","protected":false},"excerpt":{"rendered":"<p>A <strong>valve limit switch box<\/strong> that reports whether your valve is open or closed. Two SPDT mechanical switches inside send the position signal back to your control room for remote monitoring and safety interlocks, and the dome indicator on top shows open or closed at a glance.<\/p>\n<p><strong>NAMUR standard mounting<\/strong> \u2014 it fits on top of any NAMUR-compatible pneumatic actuator. IP67 enclosure. Tell us your actuator when ordering.<\/p>\n<p style=\"font-size: 14px;color: #666666\">ISO 9001 \u00b7 CE \u00b7 Manufacturer since 1999 \u00b7 Made in Taiwan<\/p>","protected":false},"featured_media":5283,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","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-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":"","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-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":"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":""},"mobile":{"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":""}}},"product_brand":[78],"product_cat":[69],"product_tag":[],"class_list":["post-3854","product","type-product","status-publish","has-post-thumbnail","product_brand-yzng-trong","product_cat-accessories","desktop-align-left","tablet-align-left","mobile-align-left","first","instock","taxable","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/ballvalves.tw\/ar\/wp-json\/wp\/v2\/product\/3854","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ballvalves.tw\/ar\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/ballvalves.tw\/ar\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ballvalves.tw\/ar\/wp-json\/wp\/v2\/media\/5283"}],"wp:attachment":[{"href":"https:\/\/ballvalves.tw\/ar\/wp-json\/wp\/v2\/media?parent=3854"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/ballvalves.tw\/ar\/wp-json\/wp\/v2\/product_brand?post=3854"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/ballvalves.tw\/ar\/wp-json\/wp\/v2\/product_cat?post=3854"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/ballvalves.tw\/ar\/wp-json\/wp\/v2\/product_tag?post=3854"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}