{"id":26505,"date":"2024-04-07T00:28:28","date_gmt":"2024-04-07T00:28:28","guid":{"rendered":"https:\/\/dresserutility.com\/kb2025\/?post_type=project&#038;p=26505"},"modified":"2025-03-27T13:59:56","modified_gmt":"2025-03-27T13:59:56","slug":"direct-spring-conventional-asme-code-f84-f85","status":"publish","type":"project","link":"https:\/\/dresserutility.com\/kb2025\/project\/direct-spring-conventional-asme-code-f84-f85\/","title":{"rendered":"Direct Spring, Conventional &#8211; ASME code (F84\/F85)"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.25.0&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;4px||17px|||&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row _builder_version=&#8221;4.25.0&#8243; _module_preset=&#8221;default&#8221; custom_margin=&#8221;|auto|10px|auto||&#8221; custom_padding=&#8221;3px||2px|||&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.25.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text _builder_version=&#8221;4.25.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<div class=\"et_pb_module et_pb_text et_pb_text_5  et_pb_text_align_left et_pb_bg_layout_light\">\n<div class=\"et_pb_text_inner\"><a href=\"https:\/\/dresserutility.com\/kb2025\/\">Home<\/a> | <a href=\"https:\/\/dresserutility.com\/kb2025\/overpressure-protection\/\">Overpressure Protection<\/a> | <a href=\"https:\/\/dresserutility.com\/kb2025\/overpressure-protection\/pressure-relief-valves\/\">Pressure Relief Valves<\/a> | Direct Spring, Conventional &#8211; ASME Code (F84\/F85)<\/div>\n<\/div>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.24.2&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;4px||3px|||&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row column_structure=&#8221;1_2,1_4,1_4&#8243; _builder_version=&#8221;4.24.2&#8243; _module_preset=&#8221;default&#8221; min_height=&#8221;2381.6px&#8221; custom_margin=&#8221;|auto|-498px|auto||&#8221; custom_padding=&#8221;||0px|||&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;1_2&#8243; _builder_version=&#8221;4.24.2&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text _builder_version=&#8221;4.24.3&#8243; _module_preset=&#8221;default&#8221; header_4_font=&#8221;Inter|700||on|||||&#8221; header_4_text_color=&#8221;gcid-574a594f-3645-42ee-a9e5-bdcdc84b45bb&#8221; header_4_font_size=&#8221;14px&#8221; header_4_letter_spacing=&#8221;1px&#8221; header_4_line_height=&#8221;1.4em&#8221; custom_margin=&#8221;-36px||0px||false|false&#8221; global_colors_info=&#8221;{%22gcid-574a594f-3645-42ee-a9e5-bdcdc84b45bb%22:%91%22header_4_text_color%22%93}&#8221;]<\/p>\n<h4>Overpressure Protection<\/h4>\n<p>[\/et_pb_text][et_pb_text _builder_version=&#8221;4.24.3&#8243; _module_preset=&#8221;default&#8221; header_2_font=&#8221;Inter|700|||||||&#8221; header_2_text_color=&#8221;#000000&#8243; header_2_font_size=&#8221;48px&#8221; header_2_line_height=&#8221;1.2em&#8221; header_2_font_size_tablet=&#8221;32px&#8221; header_2_font_size_phone=&#8221;20px&#8221; header_2_font_size_last_edited=&#8221;on|desktop&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h1><span data-contrast=\"auto\" xml:lang=\"EN-US\" lang=\"EN-US\" class=\"TextRun SCXW221766250 BCX8\"><span class=\"NormalTextRun SCXW221766250 BCX8\"><span data-contrast=\"auto\" xml:lang=\"EN-US\" lang=\"EN-US\" class=\"TextRun SCXW145107905 BCX8\"><span class=\"NormalTextRun SCXW145107905 BCX8\">Direct Spring, Conventional<br \/><\/span><\/span><\/span><\/span><\/h1>\n<p>[\/et_pb_text][et_pb_text _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; text_font=&#8221;Open Sans||||||||&#8221; text_text_color=&#8221;#666666&#8243; text_line_height=&#8221;1.8em&#8221; header_font_size_tablet=&#8221;55px&#8221; header_font_size_last_edited=&#8221;off|desktop&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h3><strong>F84M \/ F84 (Plastic Seated): Gas &amp; Vapor Service<\/strong><\/h3>\n<p>Enhanced performance conventional style SRV&#8217;s. Made in accordance with ASME Section XIII. &#8220;CE&#8221; or &#8220;UKCA&#8221; marks available. Available in brass, carbon, and stainless steel materials as standard. Special alloy construction available upon request. A variety of seat materials and connection styles available. F80M series small orifice devices are ideal for instrumentation panels, line blocks on cryogenic storage tanks, or thermal relief applications.<\/p>\n<p><!-- \/divi:paragraph --><\/p>\n<p><!-- divi:heading {\"level\":3} --><\/p>\n<h3><strong><span><br \/>F84M HP:\u00a0 Set pressure range expansion to 15,000 psig for high pressure gases<\/span><\/strong><\/h3>\n<p class=\"x_MsoNormal\">The Flow Safe F84 Micro HP is an extension of coverage of the best-in-class F84M valve, expanding the high end of set pressure range from 9,944 to 15,000 psig (-1 and -2 orifices). The Flow Safe F84M HP, sourced, built and extensively tested domestically, offers a smaller profile and footprint and provides a soft seat technology that optimizes cost savings.<\/p>\n<p><!-- \/divi:paragraph --><\/p>\n<p><!-- divi:heading {\"level\":3} --><\/p>\n<h3><strong><br \/>FEATURES<\/strong><\/h3>\n<ul>\n<li>Spring-operated, snap-acting<span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\" style=\"font-size: 16px;\">\u00a0<\/span><\/li>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"10\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" aria-setsize=\"-1\" data-aria-posinset=\"2\" data-aria-level=\"1\"><span data-contrast=\"auto\"><span>Soft seated (Plastic)<\/span><\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/li>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"10\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" aria-setsize=\"-1\" data-aria-posinset=\"3\" data-aria-level=\"1\"><span data-contrast=\"auto\"><span>Full lift at set pressure<\/span><\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/li>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"10\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" aria-setsize=\"-1\" data-aria-posinset=\"4\" data-aria-level=\"1\"><span data-contrast=\"auto\"><span>Bubble tight seating and re-seating, factory tested per API 527<\/span><\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\"><br \/><\/span><\/li>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"10\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" aria-setsize=\"-1\" data-aria-posinset=\"5\" data-aria-level=\"1\"><span data-contrast=\"auto\"><span>Adjustable blowdown<\/span><\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/li>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"10\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" aria-setsize=\"-1\" data-aria-posinset=\"6\" data-aria-level=\"1\"><span data-contrast=\"auto\"><span>Integral \/ full nozzle, corrosion resistant trim<\/span><\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/li>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"10\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" aria-setsize=\"-1\" data-aria-posinset=\"7\" data-aria-level=\"1\"><span data-contrast=\"auto\"><span>Packed lift lever available on most sizes<\/span><\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/li>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"10\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" aria-setsize=\"-1\" data-aria-posinset=\"8\" data-aria-level=\"1\"><span data-contrast=\"auto\"><span>Unbalanced against backpressure<\/span><\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/li>\n<\/ul>\n<p><!-- \/divi:list-item --><!-- \/divi:list --><\/p>\n<p><!-- divi:heading {\"level\":3} --><\/p>\n<h3 class=\"wp-block-heading\"><strong><br \/>APPLICATIONS<\/strong><\/h3>\n<ul>\n<li class=\"wp-block-heading\">Compressors<span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\" style=\"font-size: 16px;\">\u00a0<\/span><\/li>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"11\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" aria-setsize=\"-1\" data-aria-posinset=\"10\" data-aria-level=\"1\"><span data-contrast=\"auto\"><span>Full lift at set pressure<\/span><\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/li>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"11\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" aria-setsize=\"-1\" data-aria-posinset=\"11\" data-aria-level=\"1\"><span data-contrast=\"auto\"><span>Bubble tight seating and re-seating<\/span><\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/li>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"11\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" aria-setsize=\"-1\" data-aria-posinset=\"12\" data-aria-level=\"1\"><span data-contrast=\"auto\"><span>Adjustable blowdown<\/span><\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/li>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"11\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" aria-setsize=\"-1\" data-aria-posinset=\"13\" data-aria-level=\"1\"><span data-contrast=\"auto\"><span>Integral \/ full nozzle, corrosion resistant trim<\/span><\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/li>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"11\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" aria-setsize=\"-1\" data-aria-posinset=\"14\" data-aria-level=\"1\"><span data-contrast=\"auto\"><span>Packed lift lever available on most sizes<\/span><\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/li>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"11\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" aria-setsize=\"-1\" data-aria-posinset=\"15\" data-aria-level=\"1\"><span data-contrast=\"auto\"><span>Unbalanced against backpressure<\/span><\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/li>\n<\/ul>\n<p><!-- \/divi:list-item --><!-- \/divi:list --><\/p>\n<p>[\/et_pb_text][et_pb_code _builder_version=&#8221;4.25.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]<h2 id=\"tablepress-46-name\" class=\"tablepress-table-name tablepress-table-name-id-46\"><h3>Service Envelope<\/h3><\/h2>\n\n<table id=\"tablepress-46\" class=\"tablepress tablepress-id-46\" aria-labelledby=\"tablepress-46-name\">\n<tbody class=\"row-striping row-hover\">\n<tr class=\"row-1\">\n\t<td class=\"column-1\"><strong>Connection Sizes<\/strong><br \/>\n<em>Larger sizes available on request<\/em><\/td><td class=\"column-2\">\u00bc\u201d x \u00bd\u201d \u2013 2\u201d x 3\u201d<br \/>\n(6mm x 13mm \u2013 50mm x 75 mm)<\/td>\n<\/tr>\n<tr class=\"row-2\">\n\t<td class=\"column-1\"><strong>Set Pressure Ranges<\/strong><br \/>\n<em>See F80 Catalog for orifice specific ratings<\/em><\/td><td class=\"column-2\">15 - 15,000 psig<br \/>\n(1.03 - 1,034 barg)<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\"><strong>Temperature Ranges<\/strong><\/td><td class=\"column-2\"><br \/>\n-423 to 525\u00b0F<br \/>\n(-252 to 274\u00b0C)<\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-1\"><strong>Orifice Area Range<\/strong><\/td><td class=\"column-2\">.003 \u2013 1.689 in<sup>2<\/sup><br \/>\n(1.9 \u2013 1089 mm<sup>2<\/sup>)<\/td>\n<\/tr>\n<tr class=\"row-5\">\n\t<td class=\"column-1\"><strong>End Connections<\/strong><br \/>\n<em>Custom types available on request<\/em><\/td><td class=\"column-2\">Threaded: NPT, SAE, MS33649\/AS5202, AN 37\u00b0 Flare<br \/>\nWelded: ASME \/ DIN \/ API \/ SAE flanged, Grayloc<br \/>\nSpecialty: Swagelok\u00ae Tube \/ VCR, Threaded &amp; Coned<\/td>\n<\/tr>\n<tr class=\"row-6\">\n\t<td class=\"column-1\"><strong>Materials of Construction<\/strong><br \/>\n<em>Custom available for service or on request<\/em><\/td><td class=\"column-2\">Carbon Steel, Stainless Steel, Brass, Monel, Hastelloy C \/ C22 \/ C276, Duplex 22% or 25% Cr<\/td>\n<\/tr>\n<tr class=\"row-7\">\n\t<td class=\"column-1\"><strong>Seat Materials<\/strong><br \/>\n<em>Custom available for service or on request<\/em><\/td><td class=\"column-2\">Plastic: Teflon\u00ae, Ekonol-filled PTFE, Kel-F (PCTFE), PI\/PAI (Vespel\u00ae, Duratron\u00ae, or equal), PEEK<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-46 from cache -->[\/et_pb_code][et_pb_text _builder_version=&#8221;4.25.0&#8243; _module_preset=&#8221;default&#8221; text_font=&#8221;Open Sans||||||||&#8221; text_text_color=&#8221;#666666&#8243; text_line_height=&#8221;1.8em&#8221; header_font_size_tablet=&#8221;55px&#8221; header_font_size_last_edited=&#8221;off|desktop&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h2><\/h2>\n<h3>CERTIFICATIONS &amp; COMPLIANCE<\/h3>\n<ul>\n<li>ASME Sec XIII (NB-18 Cert. No. 28066)<\/li>\n<li>API 520 (Sizing &amp; Selection of PRV\u2019s) \/ API 527 (Seat tightness of PRV\u2019s)<\/li>\n<li>Superior flow capability (KA factor) vs. equivalent API 526 orifice<\/li>\n<li>API 526 center-to-face dimensions available on most sizes<\/li>\n<li>NACE MR0175 H2S compliant materials available on request<\/li>\n<li>PED \/ CE (2014\/68\/EU) compliant on request<\/li>\n<li>Canadian CRN (all Provinces per CSA B51)<\/li>\n<li>PER\/UKCA complaint or request<\/li>\n<\/ul>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;1_4&#8243; _builder_version=&#8221;4.24.2&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_image src=&#8221;https:\/\/dresserutility.com\/kb2025\/wp-content\/uploads\/2024\/04\/directspring-2.png&#8221; title_text=&#8221;directspring-2&#8243; _builder_version=&#8221;4.24.3&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_image][\/et_pb_column][et_pb_column type=&#8221;1_4&#8243; _builder_version=&#8221;4.24.2&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_heading title=&#8221;PRODUCT BRAND&#8221; _builder_version=&#8221;4.27.2&#8243; _module_preset=&#8221;default&#8221; title_level=&#8221;h5&#8243; custom_margin=&#8221;0px||0px||true|false&#8221; custom_padding=&#8221;0px||0px||true|false&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_heading][et_pb_text _builder_version=&#8221;4.27.2&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p>Flow Safe<\/p>\n<p>[\/et_pb_text][et_pb_heading title=&#8221;PRODUCT CATEGORIES&#8221; _builder_version=&#8221;4.24.2&#8243; _module_preset=&#8221;default&#8221; title_level=&#8221;h5&#8243; custom_margin=&#8221;0px||0px||true|false&#8221; custom_padding=&#8221;0px||0px||true|false&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_heading][et_pb_text _builder_version=&#8221;4.25.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]<a href=\"https:\/\/dresserutility.com\/kb2025\/overpressure-protection\/\">Overpressure Protection<\/a> | <a href=\"https:\/\/dresserutility.com\/kb2025\/overpressure-protection\/pressure-relief-valves\/\">Pressure Relief Valves<\/a>[\/et_pb_text][et_pb_text _builder_version=&#8221;4.24.2&#8243; _dynamic_attributes=&#8221;content&#8221; _module_preset=&#8221;default&#8221; custom_margin=&#8221;0px||0px||true|false&#8221; custom_padding=&#8221;0px||0px||true|false&#8221; global_colors_info=&#8221;{}&#8221;]@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF9jYXRlZ29yaWVzIiwic2V0dGluZ3MiOnsiYmVmb3JlIjoiIiwiYWZ0ZXIiOiIiLCJsaW5rX3RvX3Rlcm1fcGFnZSI6Im9uIiwic2VwYXJhdG9yIjoiIHwgIiwiY2F0ZWdvcnlfdHlwZSI6ImNhdGVnb3J5In19@[\/et_pb_text][et_pb_heading title=&#8221;APPLICABLE REGIONS&#8221; _builder_version=&#8221;4.24.2&#8243; _module_preset=&#8221;default&#8221; title_level=&#8221;h5&#8243; custom_margin=&#8221;0px||0px||true|false&#8221; custom_padding=&#8221;0px||0px||true|false&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_heading][et_pb_text _builder_version=&#8221;4.25.0&#8243; _dynamic_attributes=&#8221;content&#8221; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF90YWdzIiwic2V0dGluZ3MiOnsiYmVmb3JlIjoiIiwiYWZ0ZXIiOiIiLCJsaW5rX3RvX3Rlcm1fcGFnZSI6Im9mZiIsInNlcGFyYXRvciI6IiB8ICIsImNhdGVnb3J5X3R5cGUiOiJwcm9qZWN0X3RhZyJ9fQ==@[\/et_pb_text][et_pb_heading title=&#8221;DOWNLOADS&#8221; _builder_version=&#8221;4.25.0&#8243; _module_preset=&#8221;default&#8221; title_level=&#8221;h5&#8243; custom_margin=&#8221;0px||0px||true|false&#8221; custom_padding=&#8221;0px||0px||true|false&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_heading][et_pb_text _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243;]<a href=\"https:\/\/dresserutility.com\/kb2025\/wp-content\/uploads\/Flow-Safe-F84-F85-Series-Catalog.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">F84\/F85 Spring Operated Safety Relief Valves (Gas Service) Catalog<\/a><\/p>\n<p><a href=\"https:\/\/dresserutility.com\/kb2025\/wp-content\/uploads\/FlowSafe-F84M-HP-Brochure.pdf\" target=\"_blank\" rel=\"noopener\">F84M Relief Valve Brochure<\/a><\/p>\n<p><a href=\"https:\/\/dresserutility.com\/kb2025\/wp-content\/uploads\/Flow-Safe-F80M-Manual.pdf\" target=\"_blank\" rel=\"noopener\">F80M Relief Valve Manual<\/a><\/p>\n<p><a href=\"https:\/\/dresserutility.com\/kb2025\/wp-content\/uploads\/Flow-Safe-F80-Manual.pdf\" target=\"_blank\" rel=\"noopener\">F80 Relief Valve Manual<\/a><\/p>\n<p><a href=\"https:\/\/dresserutility.com\/kb2025\/wp-content\/uploads\/F80-Manual-RevE-Spanish.pdf\" target=\"_blank\" rel=\"noopener\">F80 Relief Valve Manual &#8211; Spanish<\/a><\/p>\n<p><a href=\"https:\/\/dresserutility.com\/kb2025\/wp-content\/uploads\/F80-Manual-RevE-Portuguese.pdf\" target=\"_blank\" rel=\"noopener\">F80 Relief Valve Manual &#8211; Portuguese<\/a><\/p>\n<p><a href=\"https:\/\/dresserutility.com\/kb2025\/wp-content\/uploads\/Flowsafesoftseated_flyer.pdf\" target=\"_blank\" rel=\"noopener\">Soft-Seated Advantages Flyer<\/a><\/p>\n<p><a href=\"https:\/\/dresserutility.com\/kb2025\/wp-content\/uploads\/Flow_Safe_Line_Card_DUS.FS_.0022.pdf\" target=\"_blank\" rel=\"noopener\">Flow Safe Line Card<\/a>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=&#8221;1_2,1_4,1_4&#8243; _builder_version=&#8221;4.24.2&#8243; _module_preset=&#8221;default&#8221; min_height=&#8221;1822.6px&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;1_2&#8243; _builder_version=&#8221;4.24.2&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text _builder_version=&#8221;4.25.0&#8243; _module_preset=&#8221;default&#8221; text_font=&#8221;Open Sans||||||||&#8221; text_text_color=&#8221;#666666&#8243; text_line_height=&#8221;1.8em&#8221; custom_padding=&#8221;0px|||||&#8221; header_font_size_tablet=&#8221;55px&#8221; header_font_size_last_edited=&#8221;off|desktop&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<ul><!-- \/divi:list-item --><\/ul>\n<h3>F85M \/ F85 (Elastomer Seated): Gas &amp; Vapor Service<\/h3>\n<p><!-- divi:paragraph --><\/p>\n<p>Enhanced performance conventional style SRV&#8217;s. Made in accordance with ASME Section XIII. &#8220;CE&#8221; or &#8220;UKCA&#8221; marks available. Available in brass, carbon, and stainless steel materials as standard. Special alloy construction available upon request. A variety of seat materials and connection styles available. F80M series small orifice devices are ideal for instrumentation panels, line blocks on cryogenic storage tanks, or thermal relief applications.<\/p>\n<p><!-- \/divi:paragraph --> <!-- divi:heading {\"level\":3} --><\/p>\n<h3 class=\"wp-block-heading\"><strong><\/strong><\/h3>\n<h3 class=\"wp-block-heading\"><strong>FEATURES<\/strong><\/h3>\n<ul>\n<ul><!-- divi:list-item --><\/ul>\n<li>Spring-operated, snap-acting<!-- \/divi:list-item --><\/li>\n<li>Soft seated (elastomer)<!-- \/divi:list-item --><\/li>\n<li>Full lift at set pressure<!-- \/divi:list-item --><\/li>\n<li>Bubble tight seating and re-seating<!-- \/divi:list-item --><\/li>\n<li>Adjustable blowdown<!-- \/divi:list-item --><\/li>\n<li>Integral \/ full nozzle, corrosion resistant trim<!-- \/divi:list-item --><\/li>\n<li>Packed lift lever available on most sizes<!-- \/divi:list-item --><\/li>\n<li>Unbalanced against backpressure<\/li>\n<\/ul>\n<p><!-- \/divi:list-item --><\/p>\n<p><!-- \/divi:list --> <!-- divi:heading {\"level\":3} --><\/p>\n<h3 class=\"wp-block-heading\"><strong><\/strong><\/h3>\n<h3 class=\"wp-block-heading\"><strong>APPLICATIONS<\/strong><!-- \/divi:heading --> <!-- divi:list --><\/h3>\n<ul>\n<ul><!-- divi:list-item --><\/ul>\n<li>Compressors<\/li>\n<li><!-- \/divi:list-item --> <!-- divi:list-item -->Thermal relief \/ instrument panels (see F84M Series)<\/li>\n<li><!-- \/divi:list-item --> <!-- divi:list-item -->Storage Tanks<\/li>\n<li><!-- \/divi:list-item --> <!-- divi:list-item -->Air\/gas equipment or processes<\/li>\n<li><!-- \/divi:list-item --> <!-- divi:list-item -->Flashing cryogenic fluids<!-- \/divi:list --><\/li>\n<\/ul>\n<p><!-- \/divi:list-item --><\/p>\n<ul><\/ul>\n<p>[\/et_pb_text][et_pb_code _builder_version=&#8221;4.25.2&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]<h2 id=\"tablepress-54-name\" class=\"tablepress-table-name tablepress-table-name-id-54\"><h3>Service Envelope<\/h3><\/h2>\n\n<table id=\"tablepress-54\" class=\"tablepress tablepress-id-54\" aria-labelledby=\"tablepress-54-name\">\n<tbody class=\"row-striping row-hover\">\n<tr class=\"row-1\">\n\t<td class=\"column-1\"><strong>Connection Sizes<\/strong><br \/>\n<em>Larger sizes available on request<\/em><\/td><td class=\"column-2\">\u00bc\u201d x \u00bd\u201d \u2013 2\u201d x 3\u201d<br \/>\n(6mm x 13mm \u2013 50mm x 75 mm)<\/td>\n<\/tr>\n<tr class=\"row-2\">\n\t<td class=\"column-1\"><strong>Set Pressure Ranges<\/strong><br \/>\n<em>See F80 Catalog for orifice specific ratings<\/em><\/td><td class=\"column-2\">15 - 10,313 psig<br \/>\n(1.03 - 711 barg)<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\"><strong>Temperature Ranges<\/strong><\/td><td class=\"column-2\"><br \/>\n-65 to 525\u00b0F<br \/>\n(-54 to 274\u00b0C)<\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-1\"><strong>Orifice Area Range<\/strong><\/td><td class=\"column-2\">.003 \u2013 1.689 in<sup>2<\/sup><br \/>\n(1.9 \u2013 1089 mm<sup>2<\/sup>)<\/td>\n<\/tr>\n<tr class=\"row-5\">\n\t<td class=\"column-1\"><strong>End Connections<\/strong><br \/>\n<em>Custom types available on request<\/em><\/td><td class=\"column-2\">Threaded: NPT, SAE, MS33649\/AS5202, AN 37\u00b0 Flare<br \/>\nWelded: ASME \/ DIN \/ API \/ SAE flanged, Grayloc<br \/>\nSpecialty: Swagelok\u00ae Tube \/ VCR, Threaded &amp; Coned<\/td>\n<\/tr>\n<tr class=\"row-6\">\n\t<td class=\"column-1\"><strong>Materials of Construction<\/strong><br \/>\n<em>Custom available for service or on request<\/em><\/td><td class=\"column-2\">Carbon Steel, Stainless Steel, Brass, Monel, Hastelloy C \/ C22 \/ C276, Duplex 22% or 25% Cr<\/td>\n<\/tr>\n<tr class=\"row-7\">\n\t<td class=\"column-1\"><strong>Seat Materials<\/strong><br \/>\n<em>Custom available for service or on request<\/em><\/td><td class=\"column-2\">Elastomer: Buna-N, Viton\u00ae (FKM) or equal, EPR\/EPDM, Aflas, FFKM (Chemraz\u00ae, Kalrez\u00ae, etc), Polyurethane, HNBR<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-54 from cache -->[\/et_pb_code][et_pb_text _builder_version=&#8221;4.25.0&#8243; _module_preset=&#8221;default&#8221; text_font=&#8221;Open Sans||||||||&#8221; text_text_color=&#8221;#666666&#8243; text_line_height=&#8221;1.8em&#8221; header_font_size_tablet=&#8221;55px&#8221; header_font_size_last_edited=&#8221;off|desktop&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h2><\/h2>\n<h3>CERTIFICATIONS &amp; COMPLIANCE<\/h3>\n<ul>\n<li>ASME Sec XIII (NB-18 Cert. No. 28066)<\/li>\n<li>API 520 (Sizing &amp; Selection of PRV\u2019s) \/ API 527 (Seat tightness of PRV\u2019s)<\/li>\n<li>Superior flow capability (KA factor) vs. equivalent API 526 orifice<\/li>\n<li>API 526 center-to-face dimensions available on most sizes<\/li>\n<li>NACE MR0175 H2S compliant materials available on request<\/li>\n<li>PED \/ CE (2014\/68\/EU) compliant on request<\/li>\n<li>Canadian CRN (all Provinces per CSA B51)<\/li>\n<li>PER\/UKCA complaint on request<\/li>\n<\/ul>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;1_4&#8243; _builder_version=&#8221;4.24.2&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_image src=&#8221;https:\/\/dresserutility.com\/kb2025\/wp-content\/uploads\/2024\/04\/85MF85Elastomer-2.jpg&#8221; title_text=&#8221;85MF85Elastomer&#8211;2&#8243; _builder_version=&#8221;4.24.3&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_image][\/et_pb_column][et_pb_column type=&#8221;1_4&#8243; _builder_version=&#8221;4.24.2&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text _builder_version=&#8221;4.24.2&#8243; _dynamic_attributes=&#8221;content&#8221; _module_preset=&#8221;default&#8221; custom_margin=&#8221;0px||0px||true|false&#8221; custom_padding=&#8221;0px||0px||true|false&#8221; global_colors_info=&#8221;{}&#8221;]@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF9jYXRlZ29yaWVzIiwic2V0dGluZ3MiOnsiYmVmb3JlIjoiIiwiYWZ0ZXIiOiIiLCJsaW5rX3RvX3Rlcm1fcGFnZSI6Im9uIiwic2VwYXJhdG9yIjoiIHwgIiwiY2F0ZWdvcnlfdHlwZSI6ImNhdGVnb3J5In19@[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>ASME Section XIII (&#8220;UV&#8221; stamped) enhanced performance direct spring-operated relief valve for gas\/vapor service.<\/p>\n","protected":false},"author":1,"featured_media":36186,"comment_status":"closed","ping_status":"closed","template":"","meta":{"nf_dc_page":"","_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"project_category":[281,282],"project_tag":[251,250,253,117,252,249,110,120],"brands":[436],"class_list":["post-26505","project","type-project","status-publish","has-post-thumbnail","hentry","project_category-overpressure-protection","project_category-pressure-relief-valves","project_tag-africa","project_tag-asia-pacific","project_tag-china","project_tag-europe","project_tag-latin-america","project_tag-middle-east","project_tag-north-america","project_tag-united-kingdom","brands-flow-safe"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Direct Spring, Conventional - ASME code (F84\/F85) - Dresser Utility Solutions<\/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:\/\/dresserutility.com\/kb2025\/project\/direct-spring-conventional-asme-code-f84-f85\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Direct Spring, Conventional - ASME code (F84\/F85) - Dresser Utility Solutions\" \/>\n<meta property=\"og:description\" content=\"ASME Section XIII (&quot;UV&quot; 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