{"id":26497,"date":"2024-04-06T23:56:21","date_gmt":"2024-04-06T23:56:21","guid":{"rendered":"https:\/\/dresserutility.com\/kb2025\/?post_type=project&#038;p=26497"},"modified":"2025-04-23T21:37:43","modified_gmt":"2025-04-23T21:37:43","slug":"direct-spring-balanced-asme-code-f84l","status":"publish","type":"project","link":"https:\/\/dresserutility.com\/kb2025\/project\/direct-spring-balanced-asme-code-f84l\/","title":{"rendered":"Direct Spring, Balanced &#8211; ASME code (F84L)"},"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>\u00a0| Direct Spring, Balanced &#8211; ASME Code (F84L)<\/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|||||&#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; 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;4.25.0&#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, Balanced by Flow Safe <\/span><\/span><\/span><\/span><\/h1>\n<p>[\/et_pb_text][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<h3>Spring Operated Safety Relief Valves (ASME)<\/h3>\n<p><strong>Flow Safe &#8211; F84L (Balanced): Liquid Service<\/strong><\/p>\n<p>Balanced style SRVs for liquid service. Balanced against the effects of backpressure without bellows. Made in accordance with ASME Section VIII or \u201cCE\u201d mark. Initial modulation at low flow\u202fwith fixed\u202fblowdown.\u202fAvailable in carbon or stainless-steel materials as standard. Special alloy construction available upon request.\u202fPlastic seated with a variety of elastomer seal materials and connection styles available.<\/p>\n<p>&nbsp;<\/p>\n<h3>FEATURES<\/h3>\n<ul>\n<li>Spring-operated, modulating at low flow<\/li>\n<li>Soft seated, fully balanced against backpressure without bellows<\/li>\n<li>Pressure assisted drag seal for smooth operation<\/li>\n<li>Full lift at 7.5% overpressure<\/li>\n<li>Leak tight seating and re-seating<\/li>\n<li>Fixed blowdown<\/li>\n<li>Integral \/ full nozzle, 316\/316L corrosion resistant trim<\/li>\n<li>Packed lift lever available on most sizes<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>APPLICATIONS<\/h3>\n<ul>\n<li>Lube oil systems<\/li>\n<li>Water systems<\/li>\n<li>Chemical processing<\/li>\n<li>Thermal relief<\/li>\n<li>High-pressure temper quench systems<\/li>\n<li>Installations with high outlet backpressures<\/li>\n<li>Positive displacement pumps<\/li>\n<\/ul>\n<p>[\/et_pb_text][et_pb_code _builder_version=&#8221;4.24.3&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]<h2 id=\"tablepress-47-name\" class=\"tablepress-table-name tablepress-table-name-id-47\">Service Envelope<\/h2>\n\n<table id=\"tablepress-47\" class=\"tablepress tablepress-id-47\" aria-labelledby=\"tablepress-47-name\">\n<tbody class=\"row-striping row-hover\">\n<tr class=\"row-1\">\n\t<td class=\"column-1\"><strong>Connection Sizes<\/strong><br \/>\nLarger sizes available on request<\/td><td class=\"column-2\">\u00bd\u201d x 1\u201d - 2\u201d x 3\u201d<br \/>\n(13mm x 25mm - 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 F84L Catalog for orifice specific ratings<\/em><\/td><td class=\"column-2\">30 \u2013 24,277 psig<br \/>\n(2.1 - 1674 barg)<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\"><strong>Temperature Ranges<\/strong><\/td><td class=\"column-2\">-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\">.015 \u2013 1.689 in<sup>2<\/sup> <br \/>\n(9.7 \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, 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\/Seal Materials<\/strong><br \/>\n<em>Custom available for service or on request<\/em><\/td><td class=\"column-2\">Seat Material (Plastic):Teflon\u00ae, Ekonol-filled PTFE, Kel-F (PCTFE), PI\/PAI (Vespel\u00ae, Duratron\u00ae, or equal), PEEK<br \/>\n<br \/>\nSpindle Seal Material (Elastomer):Buna-N, Viton\u00ae (FKM) or equal, EPR\/EPDM, FFKM (Chemraz\u00ae, Kalrez\u00ae, etc), Polyurethane, HNBR<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-47 from cache -->[\/et_pb_code][et_pb_text _builder_version=&#8221;4.24.3&#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>CERTIFICATIONS &amp; COMPLIANCE<\/h3>\n<ul>\n<li>ASME Sec VIII Div. 1 (NB-18 Cert. No. 28044, 28055, 28123, 28145, 28167)<\/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>ABS Product Design Assessment (Cert. No. 15-HS1393800-PDA)<\/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\/F84L.jpg&#8221; title_text=&#8221;F84L&#8221; _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_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;PRODUCT LITERATURE&#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; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243;]<a href=\"https:\/\/dresserutility.com\/kb2025\/wp-content\/uploads\/FlowSafe-F84L-IOM-Manual.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">F84L Manual<\/a><\/p>\n<p><a href=\"https:\/\/dresserutility.com\/kb2025\/wp-content\/uploads\/F84L-Manual-RevF-Spanish.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">F84L Manual &#8211; Spanish<\/a><\/p>\n<p><a href=\"https:\/\/dresserutility.com\/kb2025\/wp-content\/uploads\/F84L_F88_Series_Catalog.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">F84L\/F88 Spring Operated Safety Relief Valves\u00a0 (Liquid Service) Catalog<\/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_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":36188,"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-26497","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, Balanced - ASME code (F84L) - 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-balanced-asme-code-f84l\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Direct Spring, Balanced - ASME code (F84L) - Dresser Utility Solutions\" \/>\n<meta property=\"og:description\" content=\"ASME Section XIII (&quot;UV&quot; 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