{"id":7588,"date":"2026-04-05T17:29:05","date_gmt":"2026-04-05T17:29:05","guid":{"rendered":"https:\/\/www.yunrui-controls.com\/?post_type=products&#038;p=7588"},"modified":"2026-04-05T17:30:40","modified_gmt":"2026-04-05T17:30:40","slug":"fisher-4660-pneumatic-high-low-pressure-pilot","status":"publish","type":"products","link":"https:\/\/www.yunrui-controls.com\/ru\/products\/fisher-4660-pneumatic-high-low-pressure-pilot\/","title":{"rendered":"\u041f\u043d\u0435\u0432\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u043f\u0438\u043b\u043e\u0442\u043d\u044b\u0439 \u043a\u043b\u0430\u043f\u0430\u043d \u0432\u044b\u0441\u043e\u043a\u043e\u0433\u043e \u0438 \u043d\u0438\u0437\u043a\u043e\u0433\u043e \u0434\u0430\u0432\u043b\u0435\u043d\u0438\u044f Fisher 4660 | \u041f\u043e\u0441\u0442\u0430\u0432\u0449\u0438\u043a Fisher | \u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u043f\u043e\u043b\u043d\u044b\u0439 \u0430\u0441\u0441\u043e\u0440\u0442\u0438\u043c\u0435\u043d\u0442 \u043f\u0440\u043e\u0434\u0443\u043a\u0446\u0438\u0438 Fisher"},"content":{"rendered":"<h2 data-path-to-node=\"3\">\u041e\u0441\u043d\u043e\u0432\u043d\u044b\u0435 \u0442\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u043f\u0440\u0435\u0438\u043c\u0443\u0449\u0435\u0441\u0442\u0432\u0430<\/h2>\n<ul data-path-to-node=\"4\">\n<li>\n<p data-path-to-node=\"4,0,0\">Block-and-Bleed Reliability: The heart of the 4660 is a specialized relay assembly. In a trip event, it doesn&#8217;t just stop the flow; it actively bleeds the downstream pressure to zero, ensuring the safety valve closes immediately and completely.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"4,1,0\">Compliance-Ready Precision: The unit&#8217;s repeatability is engineered to meet stringent offshore and maritime standards, specifically API RP14C and OCS Order No. 5. This makes it a standard choice for high-stakes oil and gas environments.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"4,2,0\">Vibration Resistance: High-vibration environments like compressor skids can cause nuisance trips in lesser equipment. The 4660 uses a rugged Bourdon tube sensing element combined with shock-absorbing switch points to dampen these mechanical effects.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"4,3,0\">Non-Interactive Tuning: Unlike many dual-set point pilots where adjusting the High point accidentally shifts the Low point, the 4660 features high-resolution, non-interactive adjustments. You can lock your settings in place once they are dialed in.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"4,4,0\">Corrosive Service Options: For sour gas applications (H2S), a specialized N05500 nickel alloy Bourdon tube is available to meet NACE MR0175-2002 standards.<\/p>\n<\/li>\n<\/ul>\n<hr data-path-to-node=\"5\" \/>\n<h3 data-path-to-node=\"6\">\u0422\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u043e\u0435 \u044f\u0434\u0440\u043e<\/h3>\n<table data-path-to-node=\"7\">\n<thead>\n<tr>\n<td><strong>\u041e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u044c<\/strong><\/td>\n<td><strong>\u0422\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0445\u0430\u0440\u0430\u043a\u0442\u0435\u0440\u0438\u0441\u0442\u0438\u043a\u0438 \/ \u0414\u0435\u0442\u0430\u043b\u0438<\/strong><\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><span data-path-to-node=\"7,1,0,0\">Sensing Element<\/span><\/td>\n<td><span data-path-to-node=\"7,1,1,0\">Bourdon Tube (Standard or N05500 Nickel Alloy)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"7,2,0,0\">\u0412\u044b\u0445\u043e\u0434\u043d\u043e\u0439 \u0441\u0438\u0433\u043d\u0430\u043b<\/span><\/td>\n<td><span data-path-to-node=\"7,2,1,0\">0 or Full Supply Pressure<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"7,3,0,0\">Supply Pressure<\/span><\/td>\n<td><span data-path-to-node=\"7,3,1,0\">1.4 to 4.5 bar (20 to 65 psig)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"7,4,0,0\">Pressure Ranges<\/span><\/td>\n<td><span data-path-to-node=\"7,4,1,0\">Options from 0.5 bar to 690 bar (7 to 10,000 psig)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"7,5,0,0\">Repeatability<\/span><\/td>\n<td><span data-path-to-node=\"7,5,1,0\">+\/-1% of Bourdon tube rating<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"7,6,0,0\">Modular Design<\/span><\/td>\n<td><span data-path-to-node=\"7,6,1,0\">Pre-packaged parts kits for field maintenance<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"7,7,0,0\">\u0421\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u044b<\/span><\/td>\n<td><span data-path-to-node=\"7,7,1,0\">API RP14C compliant<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr data-path-to-node=\"8\" \/>\n<h4 data-path-to-node=\"9\">\u041f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f \u0438 \u043e\u0442\u0440\u0430\u0441\u043b\u0435\u0432\u044b\u0435 \u0441\u0435\u043a\u0442\u043e\u0440\u0430<\/h4>\n<p data-path-to-node=\"10\">The 4660 is primarily found in Stage 1 safety loops where a mechanical fail-safe is preferred over (or used in tandem with) electronic sensors.<\/p>\n<ul data-path-to-node=\"11\">\n<li>\n<p data-path-to-node=\"11,0,0\">Offshore Platforms: Monitoring flowline pressures to prevent overpressure in sea-floor pipelines.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"11,1,0\">Compressor Stations: Providing high-pressure protection for reciprocating and centrifugal compressors.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"11,2,0\">Production Vessels: Acting as a high\/low level or pressure trip for separators and treaters.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"11,3,0\">Remote Wellheads: Utilizing its purely pneumatic operation in areas where electrical power is unavailable or hazardous.<\/p>\n<\/li>\n<\/ul>\n<hr data-path-to-node=\"12\" \/>\n<h5 data-path-to-node=\"13\">\u0422\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Xi&#039;an Yunrui Trading Co., Ltd.<\/h5>\n<p data-path-to-node=\"14\">Xi&#8217;an Yunrui Trading Co., Ltd. is a major supplier of Fisher brand products, providing a comprehensive range of Fisher solutions. We specialize in providing original, high-efficiency Emerson automation solutions to industrial clients. Beyond supplying core hardware like the 4660 Pressure Pilot, we leverage deep technical expertise to provide professional support and model selection guidance for procurement and engineering projects. By optimizing our supply chain, we provide a distinct pricing advantage, ensuring we offer highly competitive prices while assisting clients in optimizing processes and achieving digital upgrades.<\/p>\n<p data-path-to-node=\"15\">If you are upgrading an older pneumatic safety loop and need to verify if your current supply media meets the filtration requirements for the block-and-bleed relay, please contact our technical team for a specification review.<\/p>","protected":false},"excerpt":{"rendered":"<p>The Fisher 4660 is a rugged pneumatic pilot designed specifically to trigger safety shutdown systems for flowlines, production vessels, and compressors. It acts as a pressure &#8220;gatekeeper&#8221;: as long as your process pressure stays within your defined &#8220;safe zone,&#8221; the pilot maintains full output pressure to keep your system running. The moment pressure spikes too high or drops too low, the pilot instantly bleeds its output to zero, tripping the shutdown valve.<\/p>","protected":false},"author":1,"featured_media":7589,"parent":0,"menu_order":26,"comment_status":"open","ping_status":"open","template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"tags":[336],"brands":[162,112],"model_series":[],"industries":[54,57,53,55,59],"product_cat":[122,258],"class_list":["post-7588","products","type-products","status-publish","format-standard","has-post-thumbnail","hentry","tag-fisher-supplier","brands-controllers-and-instruments","brands-fisher","industries-chemical-petrochemical","industries-food-beverage","industries-oil-gas","industries-power-generation","industries-water-wastewater","product_cat-control-valves-actuators","product_cat-controllers-and-instruments"],"acf":{"area_classification":"","certifications":"ATEX, CUTR","communication_protocol":"","data_interface":"","diagnostics":"","input_signal":"Pneumatic","max_outlet_pressure":"65 psig","mounting_type":"Remote Mount, Actuator Mount","operating_temperature":"Standard Temperature","position_control":"On\/Off","process_control":"Pressure","power_source":"","supply_media":"Air, Natural Gas","other_configurations":"Please contact us for other specifications or options for this product.","datasheet":7590},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.8 (Yoast SEO v26.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Fisher 4660 Pneumatic High-Low Pressure Pilot | Fisher Supplier<\/title>\n<meta name=\"description\" content=\"Fisher 4660 pneumatic high-low pressure pilot from Yunrui Fisher supplier - 100% genuine Emerson, competitive price. 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