{"id":4644,"date":"2026-01-21T22:09:07","date_gmt":"2026-01-21T22:09:07","guid":{"rendered":"https:\/\/yunrui-controls.com\/?post_type=products&#038;p=4644"},"modified":"2026-03-29T16:13:28","modified_gmt":"2026-03-29T16:13:28","slug":"fisher-66-series-direct","status":"publish","type":"products","link":"https:\/\/www.yunrui-controls.com\/ar\/products\/fisher-66-series-direct\/","title":{"rendered":"\u0645\u0646\u0638\u0645\u0627\u062a \u0627\u0644\u0636\u063a\u0637 \u0630\u0627\u062a \u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0627\u0644\u0645\u0628\u0627\u0634\u0631 \u0645\u0646 \u0633\u0644\u0633\u0644\u0629 \u0641\u064a\u0634\u0631 66 \u0648\u0645\u0639\u062f\u0627\u062a \u062e\u062f\u0645\u0629 \u0627\u0644\u0641\u0631\u0627\u063a"},"content":{"rendered":"<h2 data-path-to-node=\"4\">\u0627\u0644\u0641\u0648\u0627\u0626\u062f \u0648\u0627\u0644\u0645\u0632\u0627\u064a\u0627 \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n<ul data-path-to-node=\"5\">\n<li>\n<p data-path-to-node=\"5,0,0\">Sensitive Response to Pressure Changes: The oversized diaphragm-to-orifice ratio allows the 66 Series to detect and correct very small pressure deviations. This is critical for low-pressure systems where maintaining a stable setpoint is essential for safety and efficiency.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"5,1,0\">Tank Blanketing Capability: The 66 Series is an excellent choice for nitrogen padding or blanketing. It maintains a constant, positive pressure in the vapor space of a storage tank, protecting the contents from atmospheric contamination and preventing the tank from collapsing during pump-out.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"5,2,0\"><span class=\"citation-2946 citation-end-2946\">Seat Protection and Shutoff Capability: The internal design provides robust seat protection that prevents damage from high-velocity flow or minor debris.<\/span> <span class=\"citation-2945 citation-end-2945\">This protection is achieved without sacrificing the regulator&#8217;s ability to provide a tight shutoff, which is necessary to prevent pressure creep in dead-end systems.<\/span><\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"5,3,0\">Vacuum Service Versatility: Beyond pressure reduction, the 66 Series is available in specialized vacuum constructions:<\/p>\n<ol start=\"1\" data-path-to-node=\"5,3,1\">\n<li>\n<p data-path-to-node=\"5,3,1,0,0\">Vacuum Regulator: Controls the level of vacuum by throttling the flow between the vacuum source and the process.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"5,3,1,1,0\">Vacuum Breaker: Protects tanks and piping from collapse by admitting air or inert gas when the vacuum level exceeds the setpoint.<\/p>\n<\/li>\n<\/ol>\n<\/li>\n<li>\n<p data-path-to-node=\"5,4,0\">High Control Accuracy: The direct-operated architecture eliminates the complexity and potential lag of pilot systems, providing a linear and predictable response to load changes across the entire operating range.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"5,5,0\"><span class=\"citation-2944 citation-end-2944\">Application Flexibility: With various spring ranges and material options, the 66 Series can be tailored to handle a wide variety of industrial gases and environmental conditions.<\/span><\/p>\n<\/li>\n<\/ul>\n<h3 data-path-to-node=\"6\">\u0627\u0644\u062e\u0635\u0627\u0626\u0635 \u0627\u0644\u062a\u0642\u0646\u064a\u0629<\/h3>\n<ul data-path-to-node=\"7\">\n<li>\n<p data-path-to-node=\"7,0,0\">\u0637\u0631\u064a\u0642\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644: \u062a\u0639\u0645\u0644 \u0645\u0628\u0627\u0634\u0631\u0629 \u0648\u0628\u0648\u0627\u0633\u0637\u0629 \u0632\u0646\u0628\u0631\u0643.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,1,0\">Service Types: Pressure Reducing, Vacuum Reducing, or Vacuum Breaker.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,2,0\">Body Sizes: Available in standard sizes, including NPS 2 (DN 50) and larger configurations for industrial headers.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,3,0\"><span class=\"citation-2943 citation-end-2943\">End Connections: Available in NPT threaded or Flanged connections to meet global piping standards.<\/span><\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,4,0\">Media Compatibility: Suitable for natural gas, air, nitrogen, propane, and other non-corrosive gases.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,5,0\">Diaphragm Case: Large-diameter casing for maximum sensitivity at low pressures.<\/p>\n<\/li>\n<\/ul>\n<h4 data-path-to-node=\"8\">\u0645\u062c\u0627\u0644 \u0627\u0644\u062a\u0637\u0628\u064a\u0642<\/h4>\n<p data-path-to-node=\"9\"><span class=\"citation-2942 citation-end-2942\">The 66 Series is a multi-functional platform used wherever low-pressure precision is the primary requirement.<\/span><\/p>\n<h5 data-path-to-node=\"10\">\u0627\u0644\u0635\u0646\u0627\u0639\u0627\u062a \u0648\u0627\u0644\u0627\u0633\u062a\u062e\u062f\u0627\u0645\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629:<\/h5>\n<ul data-path-to-node=\"11\">\n<li>\n<p data-path-to-node=\"11,0,0\">Industrial Burners: Regulating fuel gas for precise combustion in kilns, furnaces, and large-scale ovens.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"11,1,0\">Tank Farms: Providing nitrogen blanketing and vacuum relief for chemical and fuel storage tanks.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"11,2,0\">Research Laboratories: Managing low-pressure gas distribution for sensitive testing environments.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"11,3,0\"><span class=\"citation-2941 citation-end-2941\">Vapor Recovery Systems: Controlling the flow of vapors to prevent environmental emissions and maintain system balance.<\/span><\/p>\n<div class=\"source-inline-chip-container ng-star-inserted\"><\/div>\n<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>The Fisher 66 Series consists of versatile, direct-operated regulators designed for the precise control of low-pressure industrial gases and vacuum systems. This series is a staple in gas distribution for burner manifolds and is highly effective in tank blanketing applications. The 66 Series is engineered with a large diaphragm to provide the sensitivity required for millibar-level control, ensuring that even the slightest change in pressure or vacuum is met with an immediate and accurate response.<\/p>","protected":false},"author":1,"featured_media":4645,"parent":0,"menu_order":638,"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":[311,314],"brands":[112,308],"model_series":[],"industries":[54],"product_cat":[309],"class_list":["post-4644","products","type-products","status-publish","format-standard","has-post-thumbnail","hentry","tag-fisher","tag-regulators-relief-valves","brands-fisher","brands-regulators-relief-valves","industries-chemical-petrochemical","product_cat-regulators-relief-valves"],"acf":{"body_sizes_and_end_connection_styles":"NPS 2, 3 or 4 \/ DN 50, 80 or 100\r\nCast Iron Body: NPT or CL125 FF\r\nSteel Body: NPT, CL150 RF, CL150 FF, CL300 RF","temperature_capabilities":"NBR: -40\u00b0 to 180\u00b0F \/ -40\u00b0 to 82\u00b0C\r\nFKM: 0\u00b0 to 350\u00b0F \/ -18\u00b0 to 177\u00b0C\r\nEPDM: -40\u00b0 to 275\u00b0F \/ -40\u00b0 to 135\u00b0C","maximum_inlet_pressure":"Emergency Inlet Pressure:\r\nType 66, 66Z, 66ZZ or 66 Series Vacuum Breakers: 25 psig \/ 1,7 bar positive pressure\r\n66 Series Vacuum Regulators: 8 psig or 16.3-inches of mercury \/ 0,55 bar differential vacuum\r\n\r\n","maximum_outlet_pressures":"Emergency Outlet (Casing) Pressure:\r\nType 66, 66Z or 66ZZ: 8 psig \/ 0,55 bar positive pressure\r\n66 Series VR: 14.7 psi or 29.9-in of mercury \/ 1.01 bar differential vac\r\n66 Series VB: 8 psi or 16.3-in of mercury \/ 0.55 bar differential vac","outlet_pressure_ranges":"","pressure_registration":"Type 66, 66Z or 66ZZ\r\n  Cast Iron Body: Internal (standard) or External\r\n  Steel Body: External (standard) or Internal\r\n66 Series Vacuum Regulators or Breakers: External","available_low_pressure_configurations":"","available_high_pressure_configurations":"","available_pressure_differential_configurations":"","body_and_spring_case_materials":"","approximate_weights":"NPS 2 (DN 50) NPT: 50 Pounds \/ 23 kg\r\nNPS 3 (DN 80) Body: 100 Pounds \/ 45 kg\r\nNPS 4 (DN 100) Body: 155 Pounds \/ 70 kg","available_backpressure_constructions":"","available_high_pressure_differential_constructions":"","available_constructions":"","main_valve_pressure_ratings":"","allowable_inlet_pressure":"Maximum Inlet Pressure to Avoid Internal Parts Damage: \r\nType 66: 10 psig \/ 0,69 bar\r\nType 66Z: 5 psig \/ 0,34 bar\r\nType 66ZZ: 2 psig \/ 0,14 bar\r\nRecommended Inlet Pressure:\r\nType 66, 66Z or 66 Series Vacuum Breakers: 5 psig \/ 0.34 bar positive pressure\r\nType 66Z: 2 psig \/ 0,14 bar\r\n66 Series Vacuum Regulator: 6-in w.c. or 0.4-in of mercury \/ 15 mbar differential vacuum","allowable_outlet_pressure":"Maximum Safe Pressure to Avoid Internal Parts Damage:\r\nType 66, 66Z or 66ZZ: 1 psig \/ 0,07 bar differential above outlet pressure setting\r\n66 Series Vacuum Regulator: No more than 1 psig \/ 0,07 bar differential change from spring setting","orifice_sizes":"","external_registration_connection":"","hydrogen_h2":"","capacity":"","gauge_outlet":"","maximum_temperature":"","spring_ranges":"","token_relief":"","type_tm600_true-monitor\u2122_specifications":"","type_vsx4_slam-shut_module_specifications":"","maximum_allowable_pressures":"","hydrogen_configurations":"","datasheet":4646,"live_photos":"","available_certificates":"","available_logistics":""},"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 66 Series | Original China Supplier<\/title>\n<meta name=\"description\" content=\"Ensure your operations run smoothly with a brand new Fisher 66 Series Direct-Operated Regulators and Vacuum Service Equipment. We are a verified supplie...\" \/>\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.yunrui-controls.com\/ar\/products\/fisher-66-series-direct\/\" \/>\n<meta property=\"og:locale\" content=\"ar_AR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Fisher 66 Series Direct-Operated Regulators and Vacuum Service Equipment\" \/>\n<meta property=\"og:description\" content=\"Ensure your operations run smoothly with a brand new Fisher 66 Series Direct-Operated Regulators and Vacuum Service Equipment. 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