{"id":13975,"date":"2021-01-26T04:12:30","date_gmt":"2021-01-26T04:12:30","guid":{"rendered":"https:\/\/vn-tech.com.vn\/?p=1066"},"modified":"2021-07-17T16:33:51","modified_gmt":"2021-07-17T09:33:51","slug":"what-is-a-linear-control-valve","status":"publish","type":"post","link":"https:\/\/vn-tech.com.vn\/?p=13975&lang=en","title":{"rendered":"What Is A Linear Control Valve ?"},"content":{"rendered":"<p>Linear control valve, also known as 4-20mA control valve, is used to accurately control temperature or pressure or main flow, so it also has a few other names such as:<\/p>\n<p>Temperature control valve<\/p>\n<p>Pressure control valve<\/p>\n<p>Flow control valve<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-13980 aligncenter\" src=\"https:\/\/vn-tech.com.vn\/wp-content\/uploads\/2021\/01\/WHAT-IS-A-LINEAR-CONTROL-VALVE-300x109.jpg\" alt=\"\" width=\"837\" height=\"304\" srcset=\"https:\/\/vn-tech.com.vn\/wp-content\/uploads\/2021\/01\/WHAT-IS-A-LINEAR-CONTROL-VALVE-300x109.jpg 300w, https:\/\/vn-tech.com.vn\/wp-content\/uploads\/2021\/01\/WHAT-IS-A-LINEAR-CONTROL-VALVE-600x219.jpg 600w, https:\/\/vn-tech.com.vn\/wp-content\/uploads\/2021\/01\/WHAT-IS-A-LINEAR-CONTROL-VALVE.jpg 642w\" sizes=\"(max-width: 837px) 100vw, 837px\" \/><\/p>\n<p><strong>Two types of industrial linear valves \u2013 KFM \/ Germany linear control valves:<\/strong><\/p>\n<ol>\n<li><strong>Pneumatic linear valve<\/strong><\/li>\n<\/ol>\n<p>Pneumatic linear control valve operates on the supply of compressed air to the valve&#8217;s Actuator. To do this, the controller, also known as the Positioner, must have very high accuracy.<\/p>\n<ol start=\"2\">\n<li><strong> Electric linear valve<\/strong><\/li>\n<\/ol>\n<ul>\n<li>The electric linear control valve has the advantage that it only needs to be supplied with a 220V \/ 24V source with a control signal of 4-20mA \/ 0-10V to make it work. While the pneumatic control valve is required to have a stable source of compressed air.<strong>Advantages and disadvantages of electric and pneumatic control valves<\/strong>A disadvantage of electrically controlled valves is that the running time of a stroke is quite slow, so systems with fast temperature changes must choose a pneumatic control valve.\n<p>Some areas do not have a source of compressed air, forcing us to choose an electric control valve, but if we need a fast response time, we should choose the option of a fast response time. With this option, the valve will run about 30% faster than standard.<\/p>\n<p>Compare the advantages and disadvantages of pneumatic linear valve and electric linear valve<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"312\"><strong>Pneumatic linear control valve<\/strong><\/td>\n<td width=\"312\"><strong>Pneumatic linear control valve<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"312\">\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Fast response time<\/p>\n<p>\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Precise control<\/p>\n<p>\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Requires a compressed air source<\/p>\n<p>\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Control signal 4-20mA \/ 0-10V<\/td>\n<td width=\"312\">\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Fast response time<\/p>\n<p>\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Precise control<\/p>\n<p>\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Requires a compressed air source<\/p>\n<p>\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Control signal 4-20mA \/ 0-10V<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<ol start=\"4\">\n<li><strong> Select control valve:<\/strong><\/li>\n<\/ol>\n<p>See the article: HOW TO CHOOSE THE STANDARD-QUALITY CONTROL VALVE<\/p>\n<p>With the design of each type of control valve in each different application, we choose the pneumatic linear valve or the electric linear valve accordingly.<\/p>\n<p>Technical parameter of linear control valve KFM \u2013 Germany<\/p>\n<p>Linear control valve sizes from DN15, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250.<\/p>\n<p>Withstand pressure of linear control valve from PN16, PN25, PN40.<\/p>\n<p>The working temperature of the linear control valve is from 250oC to 350oC.<\/p>\n<p>Leakage level &lt; 0.01% of the total flow through the valve.<\/p>\n<p>Materials have many types from: Cast iron, Alloy steel, 316L stainless steel &#8230;<\/p>\n<p>Time to open and close the valve from 3-5s depending on the pressure and valve diameter.<\/p>\n<p>The service life of KFM linear control valve is from 3-10 years depending on the actual application needs.<\/p>\n<p>Control signal: 4-20mA and compressed air supply from 1.6\u20266bar<\/p>\n<p>ar<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Linear control valve, also known as 4-20mA control valve, is used to accurately control temperature or pressure or main flow, so it also has a few other names such as: Temperature control valve Pressure control valve Flow control valve Two types of industrial linear valves \u2013 KFM \/ Germany linear control valves: Pneumatic linear valve &#8230; <a title=\"What Is A Linear Control Valve ?\" class=\"read-more\" href=\"https:\/\/vn-tech.com.vn\/?p=13975&#038;lang=en\" aria-label=\"More on What Is A Linear Control Valve ?\">\u0110\u1ecdc ti\u1ebfp<\/a><\/p>\n","protected":false},"author":8,"featured_media":13976,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[231],"tags":[],"class_list":["post-13975","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"lang":"en","translations":{"vi":1066,"en":13975},"pll_sync_post":[],"_links":{"self":[{"href":"https:\/\/vn-tech.com.vn\/index.php?rest_route=\/wp\/v2\/posts\/13975"}],"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=13975"}],"version-history":[{"count":4,"href":"https:\/\/vn-tech.com.vn\/index.php?rest_route=\/wp\/v2\/posts\/13975\/revisions"}],"predecessor-version":[{"id":14290,"href":"https:\/\/vn-tech.com.vn\/index.php?rest_route=\/wp\/v2\/posts\/13975\/revisions\/14290"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vn-tech.com.vn\/index.php?rest_route=\/wp\/v2\/media\/13976"}],"wp:attachment":[{"href":"https:\/\/vn-tech.com.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13975"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vn-tech.com.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=13975"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vn-tech.com.vn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=13975"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}