{"id":9939,"date":"2026-07-01T17:18:58","date_gmt":"2026-07-01T15:18:58","guid":{"rendered":"https:\/\/www.fergo.eu\/produkt\/flange-check-valves-zv\/"},"modified":"2026-07-01T17:18:58","modified_gmt":"2026-07-01T15:18:58","slug":"flange-check-valves-zv","status":"publish","type":"produkt","link":"https:\/\/www.fergo.eu\/en\/product\/flange-check-valves-zv\/","title":{"rendered":"Flange Check Valves ZV"},"content":{"rendered":"<p class=\"\">The flange check valves ZV116, ZV216, ZV226 and ZV236 are automatic valves for preventing unwanted backflow. They are designed for long-term, maintenance-free operation. The opening overpressure is 0.05 to 0.1 bar. The check valve is suitable for use as an automatic backflow preventer in hot-water and steam circuits of power plants, combined heat and power plants, extraction and transfer stations, as well as in standard heating systems. Working media: water, steam and other liquids and gases that are compatible with the media-wetted materials (body and internals). The check valves ZV226 and ZV236 also feature a bellows, which ensures hermetic sealing, and additionally a safety stuffing box made of graphite. Furthermore, these two types can be fitted with a handwheel to shut off the flow when required.      <\/p>\n","protected":false},"excerpt":{"rendered":"<p>The flange check valves ZV116, ZV216, ZV226 and ZV236 are automatic valves for preventing unwanted backflow. They are designed for long-term, maintenance-free operation. The opening overpressure is 0.05 to 0.1 bar. The check valve is suitable for use as an automatic backflow preventer in hot-water and steam circuits of power plants, combined heat and power [&hellip;]<\/p>\n","protected":false},"featured_media":9942,"template":"","meta":{"_acf_changed":false,"_acf":"","footnotes":""},"produktgruppe":[125,135],"class_list":["post-9939","produkt","type-produkt","status-publish","has-post-thumbnail","hentry","produktgruppe-non-return-valves","produktgruppe-lift-check-valves"],"acf":{"produkt_beschreibung":"<p class=\"\">The flange check valves ZV116, ZV216, ZV226 and ZV236 are automatic valves for preventing unwanted backflow. They are designed for long-term, maintenance-free operation. The opening overpressure is 0.05 to 0.1 bar. The check valve is suitable for use as an automatic backflow preventer in hot-water and steam circuits of power plants, combined heat and power plants, extraction and transfer stations, as well as in standard heating systems. Working media: water, steam and other liquids and gases that are compatible with the media-wetted materials (body and internals). The check valves ZV226 and ZV236 also feature a bellows, which ensures hermetic sealing, and additionally a safety stuffing box made of graphite. Furthermore, these two types can be fitted with a handwheel to shut off the flow when required.      <\/p>\n\n<h4>Check Valve ZV 116 P13 16\/300 with Spring (Art. No.: 300-0116-xx)<\/h4>\n<ul>\n \t<li>DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300<\/li>\n \t<li>Nominal pressure: PN16<\/li>\n \t<li>Face-to-face according to EN 558-1, series 1<\/li>\n \t<li>Flange connection PN16 with raised face Type B1, EN 1092-2<\/li>\n \t<li>Body: grey cast iron EN-JL1040<\/li>\n \t<li>Disc cone: stainless steel 1.4028<\/li>\n \t<li>Seat: stainless steel 1.4006<\/li>\n \t<li>Spring: stainless steel 1.4057<\/li>\n \t<li>Lid seal: graphite<\/li>\n \t<li>Operating temperature range: +2\u00b0C to +300\u00b0C<\/li>\n<\/ul>\n<h4>Check Valve ZV 216 P14 25\/350 with Spring (Art. No.: 300-0216-xx)<\/h4>\n<ul>\n \t<li>DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300<\/li>\n \t<li>Nominal pressure: PN25<\/li>\n \t<li>Face-to-face according to EN 558-1, series 1<\/li>\n \t<li>Flange connection PN25 with raised face Type B1, EN 1092-2<\/li>\n \t<li>Body: ductile iron EN-JS1025<\/li>\n \t<li>Disc cone: stainless steel 1.4028<\/li>\n \t<li>Seat: stainless steel 1.4006<\/li>\n \t<li>Spring: stainless steel 1.4057<\/li>\n \t<li>Lid seal: graphite<\/li>\n \t<li>Operating temperature range: +2\u00b0C to +350\u00b0C<\/li>\n<\/ul>\n<h4>Check Valve ZV 226 P11 40\/400 with Spring (Art. No.: 300-0226-xx)<\/h4>\n<ul>\n \t<li>DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200<\/li>\n \t<li>Nominal pressure: PN40<\/li>\n \t<li>Face-to-face according to EN 558-1, series 1<\/li>\n \t<li>Flange connection PN40 with raised face Type B1, EN 1092-1<\/li>\n \t<li>Body: steel casting 1.0619<\/li>\n \t<li>Disc cone: stainless steel 1.4028<\/li>\n \t<li>Bolt: stainless steel 1.4021<\/li>\n \t<li>Spring: stainless steel 1.4310<\/li>\n \t<li>Operating temperature range: -10\u00b0C to +400\u00b0C<\/li>\n<\/ul>\n<h4>Check Valve ZV 226 P11 16\/400 with Spring (Art. No.: 300-1226-xx)<\/h4>\n<ul>\n \t<li>DN65, DN80, DN100, DN125, DN150, DN200<\/li>\n \t<li>Nominal pressure: PN16<\/li>\n \t<li>Face-to-face according to EN 558-1, series 1<\/li>\n \t<li>Flange connection PN16 with raised face Type B1, EN 1092-1<\/li>\n \t<li>Body: steel casting 1.0619<\/li>\n \t<li>Disc cone: stainless steel 1.4028<\/li>\n \t<li>Bolt: stainless steel 1.4021<\/li>\n \t<li>Spring: stainless steel 1.4310<\/li>\n \t<li>Operating temperature range: -10\u00b0C to +400\u00b0C<\/li>\n<\/ul>\n<h4>Check Valve ZV 236 P18 40\/400 with Spring (Art. No.: 300-0236-xx)<\/h4>\n<ul>\n \t<li>DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200<\/li>\n \t<li>Nominal pressure: PN40<\/li>\n \t<li>Face-to-face according to EN 558-1, series 1<\/li>\n \t<li>Flange connection PN40 with raised face Type B1, EN 1092-1<\/li>\n \t<li>Body: stainless steel 1.4581<\/li>\n \t<li>Disc cone: stainless steel 1.4571<\/li>\n \t<li>Bolt: stainless steel 1.4305<\/li>\n \t<li>Spring: stainless steel 1.4310<\/li>\n \t<li>Operating temperature range: -10\u00b0C to +400\u00b0C<\/li>\n<\/ul>\n<h4>Check Valve ZV 236 P18 16\/400 with Spring (Art. No.: 300-1236-xx)<\/h4>\n<ul>\n \t<li>DN65, DN80, DN100, DN125, DN150, DN200<\/li>\n \t<li>Nominal pressure: PN16<\/li>\n \t<li>Face-to-face according to EN 558-1, series 1<\/li>\n \t<li>Flange connection PN16 with raised face Type B1, EN 1092-1<\/li>\n \t<li>Body: stainless steel 1.4581<\/li>\n \t<li>Disc cone: stainless steel 1.4571<\/li>\n \t<li>Bolt: stainless steel 1.4305<\/li>\n \t<li>Spring: stainless steel 1.4310<\/li>\n \t<li>Operating temperature range: -10\u00b0C to +400\u00b0C<\/li>\n<\/ul>","product_short_desc":"Check Valves PN16, PN25 and PN40","shop_link":"https:\/\/fergo.shop\/flansch-rueckschlagventil","technische_daten_tabellen_repeater":[{"tabellen_label":"Technical Specifications","technische_daten_repeater":[{"column_left":"Type","column_right":"Check Valve","product_fact_display":"none","product_fact_order":"","shorten":false},{"column_left":"Sizes","column_right":"DN15 - DN300","product_fact_display":"top","product_fact_order":1,"shorten":false},{"column_left":"Flange connection","column_right":"PN10, PN16, PN40, PN25","product_fact_display":"top","product_fact_order":2,"shorten":false},{"column_left":"Case material","column_right":"GG25, GGG40, 1.0619, 1.4581","product_fact_display":"top","product_fact_order":3,"shorten":false},{"column_left":"Spring","column_right":"1.4301","product_fact_display":"none","product_fact_order":"","shorten":false},{"column_left":"Pressure range","column_right":"PN40, PN25, PN16","product_fact_display":"none","product_fact_order":"","shorten":false},{"column_left":"Dichtung","column_right":"Graphit","product_fact_display":"top","product_fact_order":4,"shorten":false},{"column_left":"Connection","column_right":"Flanges","product_fact_display":"none","product_fact_order":"","shorten":false}]}],"produkt_downloads":"<a href=\"https:\/\/www.fergo.eu\/wp-content\/uploads\/2019\/01\/ZV116_ZV216_ger.pdf\">Download \"Check Valve ZV116, ZV216\" German<\/a>\n\n<a href=\"https:\/\/www.fergo.eu\/wp-content\/uploads\/2019\/01\/ZV116_ZV216_eng.pdf\">Download \"Check Valve ZV116, ZV216\" English<\/a>\n\n<a href=\"https:\/\/www.fergo.eu\/wp-content\/uploads\/2019\/01\/ZV226_ZV236_ger.pdf\">Download \"Check Valve ZV226, ZV236\" German<\/a>\n\n<a href=\"https:\/\/www.fergo.eu\/wp-content\/uploads\/2019\/01\/ZV226_ZV236_eng.pdf\">Download \"Check Valve ZV226, ZV236\" English<\/a>","datenblaetter_repeater":[{"datenblatt":5759,"download_titel":"Download \"Check Valve ZV116, ZV216\" German"},{"datenblatt":6096,"download_titel":"Download \"Check Valve ZV116, ZV216\" English"},{"datenblatt":6097,"download_titel":"Download \"Check Valve ZV226, ZV236\" German"},{"datenblatt":6098,"download_titel":"Download \"Check Valve ZV226, ZV236\" English"}],"variations_repeater":[{"variantion_titel":"Check Valve ZV 116 P13 16\/300 with Spring","article_number":"","variantion_content":"<ul>\n \t<li>DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300<\/li>\n \t<li>Nominal pressure: PN16<\/li>\n \t<li>Face-to-face according to EN 558-1, series 1<\/li>\n \t<li>Flange connection PN16 with raised face Type B1, EN 1092-2<\/li>\n \t<li>Body: grey cast iron EN-JL1040<\/li>\n \t<li>Disc cone: stainless steel 1.4028<\/li>\n \t<li>Seat: stainless steel 1.4006<\/li>\n \t<li>Spring: stainless steel 1.4057<\/li>\n \t<li>Lid seal: graphite<\/li>\n \t<li>Operating temperature range: +2\u00b0C to +300\u00b0C<\/li>\n<\/ul>"},{"variantion_titel":"Check Valve ZV 216 P14 25\/350 with Spring","article_number":"","variantion_content":"<ul>\n \t<li>DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300<\/li>\n \t<li>Nominal pressure: PN25<\/li>\n \t<li>Face-to-face according to EN 558-1, series 1<\/li>\n \t<li>Flange connection PN25 with raised face Type B1, EN 1092-2<\/li>\n \t<li>Body: ductile iron EN-JS1025<\/li>\n \t<li>Disc cone: stainless steel 1.4028<\/li>\n \t<li>Seat: stainless steel 1.4006<\/li>\n \t<li>Spring: stainless steel 1.4057<\/li>\n \t<li>Lid seal: graphite<\/li>\n \t<li>Operating temperature range: +2\u00b0C to +350\u00b0C<\/li>\n<\/ul>"},{"variantion_titel":"Check Valve ZV 226 P11 40\/400 with Spring","article_number":"","variantion_content":"<ul>\n \t<li>DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200<\/li>\n \t<li>Nominal pressure: PN40<\/li>\n \t<li>Face-to-face according to EN 558-1, series 1<\/li>\n \t<li>Flange connection PN40 with raised face Type B1, EN 1092-1<\/li>\n \t<li>Body: steel casting 1.0619<\/li>\n \t<li>Disc cone: stainless steel 1.4028<\/li>\n \t<li>Bolt: stainless steel 1.4021<\/li>\n \t<li>Spring: stainless steel 1.4310<\/li>\n \t<li>Operating temperature range: -10\u00b0C to +400\u00b0C<\/li>\n<\/ul>"},{"variantion_titel":"Check Valve ZV 226 P11 16\/400 with Spring","article_number":"","variantion_content":"<ul>\n \t<li>DN65, DN80, DN100, DN125, DN150, DN200<\/li>\n \t<li>Nominal pressure: PN16<\/li>\n \t<li>Face-to-face according to EN 558-1, series 1<\/li>\n \t<li>Flange connection PN16 with raised face Type B1, EN 1092-1<\/li>\n \t<li>Body: steel casting 1.0619<\/li>\n \t<li>Disc cone: stainless steel 1.4028<\/li>\n \t<li>Bolt: stainless steel 1.4021<\/li>\n \t<li>Spring: stainless steel 1.4310<\/li>\n \t<li>Operating temperature range: -10\u00b0C to +400\u00b0C<\/li>\n<\/ul>"},{"variantion_titel":"Check Valve ZV 236 P18 40\/400 with Spring","article_number":"","variantion_content":"<ul>\n \t<li>DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200<\/li>\n \t<li>Nominal pressure: PN40<\/li>\n \t<li>Face-to-face according to EN 558-1, series 1<\/li>\n \t<li>Flange connection PN40 with raised face Type B1, EN 1092-1<\/li>\n \t<li>Body: stainless steel 1.4581<\/li>\n \t<li>Disc cone: stainless steel 1.4571<\/li>\n \t<li>Bolt: stainless steel 1.4305<\/li>\n \t<li>Spring: stainless steel 1.4310<\/li>\n \t<li>Operating temperature range: -10\u00b0C to +400\u00b0C<\/li>\n<\/ul>"},{"variantion_titel":"Check Valve ZV 236 P18 16\/400 with Spring","article_number":"","variantion_content":"<ul>\n \t<li>DN65, DN80, DN100, DN125, DN150, DN200<\/li>\n \t<li>Nominal pressure: PN16<\/li>\n \t<li>Face-to-face according to EN 558-1, series 1<\/li>\n \t<li>Flange connection PN16 with raised face Type B1, EN 1092-1<\/li>\n \t<li>Body: stainless steel 1.4581<\/li>\n \t<li>Disc cone: stainless steel 1.4571<\/li>\n \t<li>Bolt: stainless steel 1.4305<\/li>\n \t<li>Spring: stainless steel 1.4310<\/li>\n \t<li>Operating temperature range: -10\u00b0C to +400\u00b0C<\/li>\n<\/ul>"}]},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Check Valves in Grey Cast Iron PN16 with Flange | Fergo<\/title>\n<meta name=\"description\" content=\"Flange check valves in PN16, PN25 and PN40 for effective protection and reliable flow. Now available from Fergo.\" \/>\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.fergo.eu\/en\/product\/flange-check-valves-zv\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Check Valves in Grey Cast Iron PN16 with Flange | Fergo\" \/>\n<meta property=\"og:description\" content=\"Flange check valves in PN16, PN25 and PN40 for effective protection and reliable flow. Now available from Fergo.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.fergo.eu\/en\/product\/flange-check-valves-zv\/\" \/>\n<meta property=\"og:site_name\" content=\"High-Quality Industrial Fittings &amp; Control Devices | Fergo\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.fergo.eu\/wp-content\/uploads\/2026\/06\/zv116-flanged-ruckschlagventile-gg25-fergo-v-1024x1024.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"1024\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.fergo.eu\\\/en\\\/product\\\/flange-check-valves-zv\\\/\",\"url\":\"https:\\\/\\\/www.fergo.eu\\\/en\\\/product\\\/flange-check-valves-zv\\\/\",\"name\":\"Check Valves in Grey Cast Iron PN16 with Flange | Fergo\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.fergo.eu\\\/en\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.fergo.eu\\\/en\\\/product\\\/flange-check-valves-zv\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.fergo.eu\\\/en\\\/product\\\/flange-check-valves-zv\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.fergo.eu\\\/wp-content\\\/uploads\\\/2026\\\/06\\\/zv116-flanged-ruckschlagventile-gg25-fergo-v.png\",\"datePublished\":\"2026-07-01T15:18:58+00:00\",\"description\":\"Flange check valves in PN16, PN25 and PN40 for effective protection and reliable flow. 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