{"id":780,"date":"2020-10-28T02:12:44","date_gmt":"2020-10-28T02:12:44","guid":{"rendered":"http:\/\/fivalcovalves.com\/?post_type=product&#038;p=780"},"modified":"2021-06-09T06:40:06","modified_gmt":"2021-06-09T06:40:06","slug":"fixed-orifice-double-regulating-valve-pn16","status":"publish","type":"product","link":"https:\/\/www.fivalco.com\/cn\/product\/fixed-orifice-double-regulating-valve-pn16\/","title":{"rendered":"\u9759\u6001\u5e73\u8861\u9600PN16"},"content":{"rendered":"<div class=\"row\"  id=\"row-1970276334\">\n\n\t<div id=\"col-1814972146\" class=\"col medium-9 small-12 large-9\"  >\n\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n<div class=\"container section-title-container\" ><h3 class=\"section-title section-title-normal\"><b><\/b><span class=\"section-title-main\" >TECHNICAL SPECIFICATIONS<\/span><b><\/b><\/h3><\/div>\n<table class=\"product-table\">\n<tbody>\n<tr>\n<td class=\"specs-title\">Working Pressure<\/td>\n<td class=\"specs\">16bar .<\/td>\n<\/tr>\n<tr>\n<td class=\"specs-title\">Shell Testing Pressure<\/td>\n<td class=\"specs\">(x1.5) 24bar<\/td>\n<\/tr>\n<tr>\n<td class=\"specs-title\">Seat Testing Pressure<\/td>\n<td class=\"specs\">(x1.1) 17.6bar<\/td>\n<\/tr>\n<tr>\n<td class=\"specs-title\">Working Temperature<\/td>\n<td class=\"specs\">-10\u00b0C &#8230; 120\u00b0C<\/td>\n<\/tr>\n<tr>\n<td class=\"specs-title\">Suitable Media<\/td>\n<td class=\"specs\">Water<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\t\t<\/div>\n\t\t\t<\/div>\n\n\t\n<\/div>\n<div class=\"row\"  id=\"row-1685058409\">\n\n\t<div id=\"col-121289454\" class=\"col small-12 large-12\"  >\n\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n<div class=\"container section-title-container\" ><h3 class=\"section-title section-title-normal\"><b><\/b><span class=\"section-title-main\" >Material Specification<\/span><b><\/b><\/h3><\/div>\n\t\t<\/div>\n\t\t\n<style>\n#col-121289454 > .col-inner {\n  padding: 0px 0px 0px 0px;\n  margin: 6px 0px -47px 0px;\n}\n<\/style>\n\t<\/div>\n\n\t\n\n\t<div id=\"col-1666778974\" class=\"col medium-7 small-12 large-7\"  >\n\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n<table class=\"product-table\">\n<tbody>\n<tr>\n<td><strong>Part<\/strong><\/td>\n<td><strong>Material<\/strong><\/td>\n<td><strong>Specification<\/strong><\/td>\n<\/tr>\n<tr>\n<td class=\"specs-title\">Body<\/td>\n<td class=\"specs\">Ductile Iron<\/td>\n<td class=\"specs\">EN-JS 1050<\/td>\n<\/tr>\n<tr>\n<td class=\"specs-title\">Bonnet<\/td>\n<td class=\"specs\">Ductile Iron<\/td>\n<td class=\"specs\">EN-JS 1050<\/td>\n<\/tr>\n<tr>\n<td class=\"specs-title\">Stem<\/td>\n<td class=\"specs\">Stainless Steel 410(DN65&#8230;DN300)<br \/>Stainless Steel 431(DN350&#8230;DN600)<\/td>\n<td class=\"specs\">EN 10088-3 1.4006<br \/>EN 10088-3 1.4057<\/td>\n<\/tr>\n<tr>\n<td class=\"specs-title\">Balancing Cone<\/td>\n<td class=\"specs\">Ductile Iron<\/td>\n<td class=\"specs\">EN-JS 1050<\/td>\n<\/tr>\n<tr>\n<td class=\"specs-title\">Disc\u00a0<\/td>\n<td class=\"specs\">EPDM coated DI\u00a0<\/td>\n<td class=\"specs\">EN-JS 1050<\/td>\n<\/tr>\n<tr>\n<td class=\"specs-title\">Gland\u00a0<\/td>\n<td class=\"specs\">Brass (DN65&#8230;DN150)<br \/>Ductile Iron (DN200&#8230;DN600)<\/td>\n<td class=\"specs\">EN 12165 CW617N<br \/>EN-JS 1050<\/td>\n<\/tr>\n<tr>\n<td class=\"specs-title\">Gland Nut\u00a0<\/td>\n<td class=\"specs\">Brass\u00a0<\/td>\n<td class=\"specs\">EN 12165 CW617N<\/td>\n<\/tr>\n<tr>\n<td class=\"specs-title\">Orifice Insert\u00a0<\/td>\n<td class=\"specs\">DZR Brass\u00a0<\/td>\n<td class=\"specs\">EN 12165 CW602N<\/td>\n<\/tr>\n<tr>\n<td class=\"specs-title\">Measuring Plug\u00a0<\/td>\n<td class=\"specs\">DZR Brass\u00a0<\/td>\n<td class=\"specs\">EN 12165 CW602N<\/td>\n<\/tr>\n<tr>\n<td class=\"specs-title\">Handwheel\u00a0<\/td>\n<td class=\"specs\">Ductile Iron\u00a0<\/td>\n<td class=\"specs\">EN-JS 1050<\/td>\n<\/tr>\n<tr>\n<td class=\"specs-title\">Packing\u00a0<\/td>\n<td class=\"specs\">Graphite\u00a0<\/td>\n<td class=\"specs\">Non-Asbestos<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\t\t<\/div>\n\t\t\t<\/div>\n\n\t\n\n\t<div id=\"col-285404660\" class=\"col medium-4 small-12 large-4\"  >\n\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_1547763356\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img width=\"606\" height=\"679\" src=\"https:\/\/www.fivalco.com\/cn\/wp-content\/uploads\/sites\/2\/2020\/10\/img25.jpg\" class=\"attachment-large size-large\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.fivalco.com\/cn\/wp-content\/uploads\/sites\/2\/2020\/10\/img25.jpg 606w, https:\/\/www.fivalco.com\/cn\/wp-content\/uploads\/sites\/2\/2020\/10\/img25-357x400.jpg 357w, https:\/\/www.fivalco.com\/cn\/wp-content\/uploads\/sites\/2\/2020\/10\/img25-600x672.jpg 600w\" sizes=\"(max-width: 606px) 100vw, 606px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_1547763356 {\n  width: 89%;\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t<\/div>\n\n\t\n<\/div>\n<div class=\"row\"  id=\"row-1115178588\">\n\n\t<div id=\"col-2066528037\" class=\"col small-12 large-12\"  >\n\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n<div class=\"container section-title-container\" ><h3 class=\"section-title section-title-normal\"><b><\/b><span class=\"section-title-main\" >DIMENSIONS<\/span><b><\/b><\/h3><\/div>\n<table class=\"product-table\" width=\"\">\n<tbody>\n<tr>\n<td class=\"specs\">DN<\/td>\n<td class=\"specs\">(mm)<\/p>\n<p>(inch)<\/p>\n<\/td>\n<td class=\"specs\">65<\/p>\n<p>2<sup>1<\/sup>\/<sub>2<\/sub><\/p>\n<\/td>\n<td class=\"specs\">80<\/p>\n<p>3<\/p>\n<\/td>\n<td class=\"specs\">100<\/p>\n<p>4<\/p>\n<\/td>\n<td class=\"specs\">125<\/p>\n<p>5<\/p>\n<\/td>\n<td class=\"specs\">150<\/p>\n<p>6<\/p>\n<\/td>\n<td class=\"specs\">200<\/p>\n<p>8<\/p>\n<\/td>\n<td class=\"specs\">250<\/p>\n<p>10<\/p>\n<\/td>\n<td class=\"specs\">300<\/p>\n<p>12<\/p>\n<\/td>\n<td class=\"specs\">350<\/p>\n<p>14<\/p>\n<\/td>\n<td class=\"specs\">400<\/p>\n<p>16<\/p>\n<\/td>\n<td class=\"specs\">450<\/p>\n<p>18<\/p>\n<\/td>\n<td class=\"specs\">500<\/p>\n<p>20<\/p>\n<\/td>\n<td class=\"specs\">600<\/p>\n<p>24<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td class=\"specs\">\u00a0<\/td>\n<td class=\"specs\">L<\/td>\n<td class=\"specs\">290\u00a0<\/td>\n<td class=\"specs\">310\u00a0<\/td>\n<td class=\"specs\">350\u00a0<\/td>\n<td class=\"specs\">400\u00a0<\/td>\n<td class=\"specs\">480\u00a0<\/td>\n<td class=\"specs\">600\u00a0<\/td>\n<td class=\"specs\">730\u00a0<\/td>\n<td class=\"specs\">850\u00a0<\/td>\n<td class=\"specs\">980\u00a0<\/td>\n<td class=\"specs\">1100\u00a0<\/td>\n<td class=\"specs\">1200\u00a0<\/td>\n<td class=\"specs\">1250\u00a0<\/td>\n<td class=\"specs\">1450<\/td>\n<\/tr>\n<tr>\n<td class=\"specs\">\u00a0<\/td>\n<td class=\"specs\">H<\/td>\n<td class=\"specs\">265\u00a0\u00a0<\/td>\n<td class=\"specs\">270\u00a0<\/td>\n<td class=\"specs\">310\u00a0<\/td>\n<td class=\"specs\">340\u00a0<\/td>\n<td class=\"specs\">340\u00a0<\/td>\n<td class=\"specs\">537\u00a0<\/td>\n<td class=\"specs\">570\u00a0<\/td>\n<td class=\"specs\">690\u00a0<\/td>\n<td class=\"specs\">685\u00a0<\/td>\n<td class=\"specs\">965\u00a0<\/td>\n<td class=\"specs\">1020\u00a0<\/td>\n<td class=\"specs\">1065\u00a0<\/td>\n<td class=\"specs\">1180<\/td>\n<\/tr>\n<tr>\n<td class=\"specs\">\u00a0<\/td>\n<td class=\"specs\">D<\/td>\n<td class=\"specs\">200\u00a0<\/td>\n<td class=\"specs\">200\u00a0<\/td>\n<td class=\"specs\">240\u00a0<\/td>\n<td class=\"specs\">290\u00a0<\/td>\n<td class=\"specs\">290\u00a0<\/td>\n<td class=\"specs\">350\u00a0<\/td>\n<td class=\"specs\">420\u00a0<\/td>\n<td class=\"specs\">420\u00a0<\/td>\n<td class=\"specs\">420\u00a0<\/td>\n<td class=\"specs\">640\u00a0<\/td>\n<td class=\"specs\">640\u00a0<\/td>\n<td class=\"specs\">640\u00a0<\/td>\n<td class=\"specs\">640<\/td>\n<\/tr>\n<tr>\n<td class=\"specs\">\u00a0<\/td>\n<td class=\"specs\">Kvs(Fully Open)<\/td>\n<td class=\"specs\">104\u00a0\u00a0<\/td>\n<td class=\"specs\">116\u00a0<\/td>\n<td class=\"specs\">213\u00a0<\/td>\n<td class=\"specs\">333\u00a0<\/td>\n<td class=\"specs\">476\u00a0<\/td>\n<td class=\"specs\">768\u00a0<\/td>\n<td class=\"specs\">1153\u00a0<\/td>\n<td class=\"specs\">1743\u00a0<\/td>\n<td class=\"specs\">1798\u00a0<\/td>\n<td class=\"specs\">2338<\/td>\n<td class=\"specs\">2698\u00a0<\/td>\n<td class=\"specs\">3708\u00a0<\/td>\n<td class=\"specs\">4500<\/td>\n<\/tr>\n<tr>\n<td class=\"specs\">\u00a0<\/td>\n<td class=\"specs\">Handwheel Turns<\/td>\n<td class=\"specs\">8<\/td>\n<td class=\"specs\">8<\/td>\n<td class=\"specs\">8<\/td>\n<td class=\"specs\">8<\/td>\n<td class=\"specs\">8<\/td>\n<td class=\"specs\">12<\/td>\n<td class=\"specs\">12<\/td>\n<td class=\"specs\">18<\/td>\n<td class=\"specs\">18<\/td>\n<td class=\"specs\">24<\/td>\n<td class=\"specs\">24<\/td>\n<td class=\"specs\">24<\/td>\n<td class=\"specs\">24<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\t\t<\/div>\n\t\t\n<style>\n#col-2066528037 > .col-inner {\n  padding: 14px 0px 0px 0px;\n  margin: 0px 0px -14px 0px;\n}\n<\/style>\n\t<\/div>\n\n\t\n\n<style>\n#row-1115178588 > .col > .col-inner {\n  padding: 0px 0px 14px 0px;\n}\n<\/style>\n<\/div>\n<div class=\"row\"  id=\"row-273728298\">\n\n\t<div id=\"col-929876464\" class=\"col small-12 large-12\"  >\n\t\t<div class=\"col-inner text-center\"  >\n\t\t\t\n\t\t\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_998470608\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img width=\"797\" height=\"702\" src=\"https:\/\/www.fivalco.com\/cn\/wp-content\/uploads\/sites\/2\/2020\/10\/img26.jpg\" class=\"attachment-large size-large\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.fivalco.com\/cn\/wp-content\/uploads\/sites\/2\/2020\/10\/img26.jpg 797w, https:\/\/www.fivalco.com\/cn\/wp-content\/uploads\/sites\/2\/2020\/10\/img26-454x400.jpg 454w, https:\/\/www.fivalco.com\/cn\/wp-content\/uploads\/sites\/2\/2020\/10\/img26-768x676.jpg 768w, https:\/\/www.fivalco.com\/cn\/wp-content\/uploads\/sites\/2\/2020\/10\/img26-600x528.jpg 600w\" sizes=\"(max-width: 797px) 100vw, 797px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_998470608 {\n  width: 55%;\n}\n<\/style>\n\t<\/div>\n\t\n<table class=\"product-table\" width=\"\">\n<tbody>\n<tr>\n<td class=\"specs\">DN<\/td>\n<td class=\"specs\">(mm)<\/p>\n<p>(inch)<\/p>\n<\/td>\n<td class=\"specs\">65<\/p>\n<p>2<sup>1<\/sup>\/<sub>2<\/sub><\/p>\n<\/td>\n<td class=\"specs\">80<\/p>\n<p>3<\/p>\n<\/td>\n<td class=\"specs\">100<\/p>\n<p>4<\/p>\n<\/td>\n<td class=\"specs\">125<\/p>\n<p>5<\/p>\n<\/td>\n<td class=\"specs\">150<\/p>\n<p>6<\/p>\n<\/td>\n<td class=\"specs\">200<\/p>\n<p>8<\/p>\n<\/td>\n<td class=\"specs\">250<\/p>\n<p>10<\/p>\n<\/td>\n<td class=\"specs\">300<\/p>\n<p>12<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td class=\"specs\">\u00a0<\/td>\n<td class=\"specs\">Kvs<\/td>\n<td class=\"specs\">104.00<\/td>\n<td class=\"specs\">116.00<\/td>\n<td class=\"specs\">213.00<\/td>\n<td class=\"specs\">333.00<\/td>\n<td class=\"specs\">476.00<\/td>\n<td class=\"specs\">768.00<\/td>\n<td class=\"specs\">1153.00<\/td>\n<td class=\"specs\">1743.00<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\t\t<\/div>\n\t\t\t<\/div>\n\n\t\n<\/div>\n<div class=\"row\"  id=\"row-1366301875\">\n\n\t<div id=\"col-791091506\" class=\"col small-12 large-12\"  >\n\t\t<div class=\"col-inner text-center\"  >\n\t\t\t\n\t\t\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_872324641\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img width=\"655\" height=\"733\" src=\"https:\/\/www.fivalco.com\/cn\/wp-content\/uploads\/sites\/2\/2020\/10\/img27.jpg\" class=\"attachment-large size-large\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.fivalco.com\/cn\/wp-content\/uploads\/sites\/2\/2020\/10\/img27.jpg 655w, https:\/\/www.fivalco.com\/cn\/wp-content\/uploads\/sites\/2\/2020\/10\/img27-357x400.jpg 357w, https:\/\/www.fivalco.com\/cn\/wp-content\/uploads\/sites\/2\/2020\/10\/img27-600x671.jpg 600w\" sizes=\"(max-width: 655px) 100vw, 655px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_872324641 {\n  width: 52%;\n}\n<\/style>\n\t<\/div>\n\t\n<table class=\"product-table\" width=\"\">\n<tbody>\n<tr>\n<td class=\"specs\">DN<\/td>\n<td class=\"specs\">(mm)<\/p>\n<p>(inch)<\/p>\n<\/td>\n<td class=\"specs\">350\u00a0<\/p>\n<p>14\u00a0<\/p>\n<\/td>\n<td class=\"specs\">400\u00a0<\/p>\n<p>16<\/p>\n<\/td>\n<td class=\"specs\">450\u00a0<\/p>\n<p>18\u00a0<\/p>\n<\/td>\n<td class=\"specs\">500\u00a0\u00a0<\/p>\n<p>20<\/p>\n<\/td>\n<td class=\"specs\">600<\/p>\n<p>24<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td class=\"specs\">\u00a0<\/td>\n<td class=\"specs\">Kvs<\/td>\n<td class=\"specs\">1798.00\u00a0<\/td>\n<td class=\"specs\">2338.00\u00a0<\/td>\n<td class=\"specs\">2698.00\u00a0<\/td>\n<td class=\"specs\">3708.00\u00a0<\/td>\n<td class=\"specs\">4500.00<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\t\t<\/div>\n\t\t\t<\/div>\n\n\t\n\n\t<div id=\"col-1153257367\" class=\"col medium-7 small-12 large-7\"  >\n\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n<p><span style=\"font-size: 110%;\"><strong>INSTALLATION &amp; OPERATION GUIDE<\/strong><\/span><\/p>\n<p>Install the Double Regulating Valve in the pipe line by ensuring the arrow marking on the valve is same direction as piping flow.<\/p>\n<p>To achieve flow measurement accuracy, it is essential that the piping on the inlet and outlet of the valve is straight and has a minimum length equivalent to 5 Diameters (5D) inlet and 2 Diameters (2D) outlet as shown. If the valve is install at the discharge side of a pump set, it is essential that the straight pipe length between pump outlet\u00a0 and valve has a minimum length of 10 Diameters (10D).<\/p>\n<p>Gaskets must be used and assembled between valve and flanges. This will ensure the installation is concentric with pipe line and better accuracy is obtained.<\/p>\n<p>Design flow is achieved by pre-setting valve\u2019s opening position, which could be read from scales at the handwheel. Contact your local distributor for information on electronic commissioning meter.<\/p>\n<p>To lock the pre-setting of the valve, push the limitation ring at the scales at the bottom of the handwheel, tighten the screw using the hexagon wrench.<\/p>\n<p>Valve must not be lifted by holding the handwheel.<\/p>\n\t\t<\/div>\n\t\t\t<\/div>\n\n\t\n\n\t<div id=\"col-968113649\" class=\"col medium-5 small-12 large-5\"  >\n\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_551106764\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img width=\"509\" height=\"775\" src=\"https:\/\/www.fivalco.com\/cn\/wp-content\/uploads\/sites\/2\/2020\/10\/img28.jpg\" class=\"attachment-large size-large\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.fivalco.com\/cn\/wp-content\/uploads\/sites\/2\/2020\/10\/img28.jpg 509w, https:\/\/www.fivalco.com\/cn\/wp-content\/uploads\/sites\/2\/2020\/10\/img28-263x400.jpg 263w\" sizes=\"(max-width: 509px) 100vw, 509px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_551106764 {\n  width: 91%;\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t<\/div>\n\n\t\n<\/div>\n","protected":false},"excerpt":{"rendered":"<h3>PN16 Fig No.: F63F<\/h3>\n<h4>FEATURES &amp; SPECIFICATIONS<\/h4>\n<ul>\n<li>Single unit Y-pattern globe valves incorporating fixed orifice plate flow measurement unit.<\/li>\n<li>Fitted with a pair of measuring plugs.<\/li>\n<li>High measurement accuracy of +\/-5% across all opening settings.<\/li>\n<li>Microset handwheel and presetting scale is readable from all directions.<\/li>\n<li>Regulating and isolating functions.<\/li>\n<li>Setting can be locked with allen key.<\/li>\n<li>Flange drilled to BS 4504 PN16 \/ EN 1092-2 PN16 \/ ANSI CLASS 150 (Specify on order)<\/li>\n<li>Comply with BS 7350<\/li>\n<li>Applicable for hydronic balancing of heating and cooling systems<\/li>\n<\/ul>\n","protected":false},"featured_media":781,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"product_cat":[17,18],"product_tag":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u9759\u6001\u5e73\u8861\u9600PN16 - Fivalco<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.fivalco.com\/cn\/product\/fixed-orifice-double-regulating-valve-pn16\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u9759\u6001\u5e73\u8861\u9600PN16 - Fivalco\" \/>\n<meta property=\"og:description\" content=\"PN16 Fig No.: F63F FEATURES &amp; SPECIFICATIONS   Single unit Y-pattern globe valves incorporating fixed orifice plate flow measurement unit.  Fitted with a pair of measuring plugs.  High measurement accuracy of +\/-5% across all opening settings.  Microset handwheel and presetting scale is readable from all directions.  Regulating and isolating functions.  Setting can be locked with allen key.  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