{"id":25980,"date":"2024-04-04T07:06:34","date_gmt":"2024-04-04T07:06:34","guid":{"rendered":"https:\/\/dresserutility.com\/kb2025\/project\/direct-spring-balanced-2\/"},"modified":"2025-04-25T15:48:08","modified_gmt":"2025-04-25T15:48:08","slug":"direct-spring-balanced-2","status":"publish","type":"project","link":"https:\/\/dresserutility.com\/kb2025\/project\/direct-spring-balanced-2\/","title":{"rendered":"Direct Spring, Balanced &#8211; ASME code (F88)"},"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 (F88)<\/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;4.24.3&#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 style=\"text-align: left;\"><span data-contrast=\"auto\" xml:lang=\"EN-US\" lang=\"EN-US\"><span data-contrast=\"auto\" xml:lang=\"EN-US\" lang=\"EN-US\">F88 (Balanced): Gas \/ Liquid \/ 2-Phase Service<br \/><\/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 class=\"drophead\">Spring Operated Safety Relief Valves (ASME)<\/h3>\n<p>Balanced style SRV&#8217;s for gas, liquid, or mixed phase service. Balanced against the effects of backpressure without bellows. Made in accordance with ASME Section VIII or &#8220;CE&#8221; mark. Pop action on gas; initial modulation on liquid with fixed\u00a0blowdown.\u00a0Available in carbon or stainless steel materials as standard. Special alloy construction available upon request.\u00a0Plastic seat\/seals with various connection styles available.<\/p>\n<h3>FEATURES<\/h3>\n<ul>\n<li>Spring-operated, snap-acting (gas) or modulating (liquid, low flow)<\/li>\n<li>Soft seated w\/ backup metal-to-metal seat<\/li>\n<li>Fully balanced against backpressure without bellows<\/li>\n<li>Spring energizing V-seal for smooth operation<\/li>\n<li>Full lift:\u00a0\u00a0Gas = Set pressure, Liquid = 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>Variable gas or liquid service<\/li>\n<li>Mixed phase applications<\/li>\n<li>Cryogenic fluids<\/li>\n<li>Chemical processing<\/li>\n<li>Al plastic seat &amp; seals for process compatibility<\/li>\n<li>nstallations with high outlet backpressures<\/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-48-name\" class=\"tablepress-table-name tablepress-table-name-id-48\">Service Envelope<\/h2>\n\n<table id=\"tablepress-48\" class=\"tablepress tablepress-id-48\" aria-labelledby=\"tablepress-48-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>Custom sizes available on request<\/em><\/td><td class=\"column-2\">\u00bd\u201d x \u00bd\u201d - 2\u201d x 3\u201d<br \/>\n(13mm x 13mm - 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 F88 Gas or Liquid Catalog for orifice specific ratings<\/em><\/td><td class=\"column-2\">30 \u2013 8,382 psig<br \/>\n(2.1 - 578 barg)<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\"><strong>Temperature Ranges<\/strong><br \/>\n<br \/>\n<\/td><td class=\"column-2\">-423 to 400\u00b0F<br \/>\n(-252 to 204\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\">.065 \u2013 1.689 in2<br \/>\n(41.9 \u2013 1089 mm2)<\/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 \/>\nSpindle Seal Material (Plastic): Spring-energized Teflon V-Seal<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-48 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>\n<p>ASME Sec VIII Div. 1 (NB-18 Cert. No. 28044, 28055,28077, 28088, 28101, 28112, 28134, 28145)<\/p>\n<\/li>\n<li>\n<p>API 520 (Sizing &amp; Selection of PRV\u2019s) \/ API 527 (Seat tightness of PRV\u2019s)<\/p>\n<\/li>\n<li>\n<p>Superior flow capability (KA factor) vs. equivalent API 526 orifice<\/p>\n<\/li>\n<li>\n<p>API 526 center-to-face dimensions available on most sizes<\/p>\n<\/li>\n<li>\n<p>NACE MR0175 H2S compliant materials available on request<\/p>\n<\/li>\n<li>\n<p>PED \/ CE (2014\/68\/EU) compliant on request<\/p>\n<\/li>\n<li>\n<p>Canadian CRN (all Provinces per CSA B51)<\/p>\n<\/li>\n<li>\n<p>ABS Product Design Assessment (Cert. No. 15-HS1393800-PDA)<\/p>\n<\/li>\n<li>\n<p>US Patent No. 7,513,270<\/p>\n<\/li>\n<\/ul>\n<ul><\/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\/F88.jpg&#8221; title_text=&#8221;F88&#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;4.27.2&#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;4.25.0&#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; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243;]<a href=\"https:\/\/dresserutility.com\/kb2025\/wp-content\/uploads\/Flow-Safe-F88-IOM-Manual.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">F88 Manual<\/a><\/p>\n<p><a href=\"https:\/\/dresserutility.com\/kb2025\/wp-content\/uploads\/FlowSafe-F80-catalog-Nov2018.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">F88 Spring Operated Safety Relief Valves (Gas Service) Catalog<\/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 &#038; liquid service.<\/p>\n","protected":false},"author":1,"featured_media":36190,"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-25980","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 (F88) - 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-2\/\" \/>\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 (F88) - Dresser Utility Solutions\" \/>\n<meta property=\"og:description\" content=\"ASME Section XIII (&quot;UV&quot; 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