{"id":3985,"date":"2026-01-27T19:09:40","date_gmt":"2026-01-27T12:09:40","guid":{"rendered":"https:\/\/shennan2.tvg.agency\/product\/cum-van-dieu-chinh-ap-suat-tu-van-hanh-dn25-pn40\/"},"modified":"2026-02-07T19:44:01","modified_gmt":"2026-02-07T12:44:01","slug":"self-operated-pressure-regulating-valve","status":"publish","type":"product","link":"https:\/\/shennan2.tvg.agency\/en\/product\/self-operated-pressure-regulating-valve\/","title":{"rendered":"Self-Operated Pressure Regulating Valve Assembly DN25 PN40"},"content":{"rendered":"<p data-start=\"0\" data-end=\"62\"><strong data-start=\"0\" data-end=\"62\">Self-Operated Pressure Regulating Valve Assembly DN25 PN40<\/strong><\/p>\n<p data-start=\"64\" data-end=\"91\"><strong data-start=\"64\" data-end=\"91\">Technical Requirements:<\/strong><\/p>\n<ul data-start=\"92\" data-end=\"697\">\n<li data-start=\"92\" data-end=\"208\">\n<p data-start=\"94\" data-end=\"208\">Must comply with GB50235-1997 <em data-start=\"124\" data-end=\"206\">\u201cCode for Construction and Acceptance of Industrial Metal Pipeline Engineering.\u201d<\/em><\/p>\n<\/li>\n<li data-start=\"209\" data-end=\"304\">\n<p data-start=\"211\" data-end=\"304\">Materials must comply with GB\/T8163-1999 <em data-start=\"252\" data-end=\"302\">\u201cSeamless Steel Pipes for Fluid Transportation.\u201d<\/em><\/p>\n<\/li>\n<li data-start=\"305\" data-end=\"624\">\n<p data-start=\"307\" data-end=\"624\">After completion of manufacturing, a hydraulic strength test shall be conducted at <strong data-start=\"390\" data-end=\"401\">5.0 MPa<\/strong> with a pressure holding time of <strong data-start=\"434\" data-end=\"448\">30 minutes<\/strong>, with <strong data-start=\"455\" data-end=\"479\">no leakage permitted<\/strong>. This shall be followed by an air tightness test at <strong data-start=\"532\" data-end=\"543\">3.0 MPa<\/strong> with a pressure holding time of <strong data-start=\"576\" data-end=\"590\">30 minutes<\/strong>, with <strong data-start=\"597\" data-end=\"621\">no leakage permitted<\/strong>.<\/p>\n<\/li>\n<li data-start=\"625\" data-end=\"697\">\n<p data-start=\"627\" data-end=\"697\">After degreasing treatment, all pipe openings must be properly sealed.<\/p>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone wp-image-3604 size-medium\" src=\"https:\/\/shennan2.tvg.agency\/wp-content\/uploads\/2026\/01\/van-dn20-pn40-237x300.jpg\" alt=\"Self-Operated Pressure Regulating Valve Assembly DN25 PN40\" width=\"237\" height=\"300\" srcset=\"https:\/\/shennan2.tvg.agency\/wp-content\/uploads\/2026\/01\/van-dn20-pn40-237x300.jpg 237w, https:\/\/shennan2.tvg.agency\/wp-content\/uploads\/2026\/01\/van-dn20-pn40.jpg 306w\" sizes=\"(max-width: 237px) 100vw, 237px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p data-start=\"699\" data-end=\"724\"><strong data-start=\"699\" data-end=\"724\">Technical Parameters:<\/strong><\/p>\n<p data-start=\"727\" data-end=\"758\"><strong data-start=\"727\" data-end=\"746\">Inlet pressure:<\/strong> \u2264 1.6 MPa<\/p>\n<p data-start=\"761\" data-end=\"800\"><strong data-start=\"761\" data-end=\"784\">Design temperature:<\/strong> \u221240\u00b0C to 60\u00b0C<\/p>\n<p data-start=\"803\" data-end=\"842\"><strong data-start=\"803\" data-end=\"826\">Operating pressure:<\/strong> 0.5 \u2013 0.8 MPa<\/p>\n<p data-start=\"845\" data-end=\"893\"><strong data-start=\"845\" data-end=\"871\">Operating temperature:<\/strong> Ambient temperature<\/p>\n<p data-start=\"896\" data-end=\"944\"><strong data-start=\"896\" data-end=\"907\">Medium:<\/strong> Oxygen, nitrogen, argon, CO\u2082, etc.<\/p>\n","protected":false},"featured_media":3943,"comment_status":"closed","ping_status":"closed","template":"","meta":{"content-type":""},"product_brand":[],"product_cat":[123],"product_tag":[],"bao-gia":[137],"cong-nghe":[],"loai-bon-chua":[],"phan-khuc-gia":[],"dang-bon-chua":[],"class_list":{"0":"post-3985","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-accessory","7":"bao-gia-medical-supplies","9":"first","10":"instock","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/shennan2.tvg.agency\/en\/wp-json\/wp\/v2\/product\/3985","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/shennan2.tvg.agency\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/shennan2.tvg.agency\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/shennan2.tvg.agency\/en\/wp-json\/wp\/v2\/comments?post=3985"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/shennan2.tvg.agency\/en\/wp-json\/wp\/v2\/media\/3943"}],"wp:attachment":[{"href":"https:\/\/shennan2.tvg.agency\/en\/wp-json\/wp\/v2\/media?parent=3985"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/shennan2.tvg.agency\/en\/wp-json\/wp\/v2\/product_brand?post=3985"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/shennan2.tvg.agency\/en\/wp-json\/wp\/v2\/product_cat?post=3985"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/shennan2.tvg.agency\/en\/wp-json\/wp\/v2\/product_tag?post=3985"},{"taxonomy":"bao-gia","embeddable":true,"href":"https:\/\/shennan2.tvg.agency\/en\/wp-json\/wp\/v2\/bao-gia?post=3985"},{"taxonomy":"cong-nghe","embeddable":true,"href":"https:\/\/shennan2.tvg.agency\/en\/wp-json\/wp\/v2\/cong-nghe?post=3985"},{"taxonomy":"loai-bon-chua","embeddable":true,"href":"https:\/\/shennan2.tvg.agency\/en\/wp-json\/wp\/v2\/loai-bon-chua?post=3985"},{"taxonomy":"phan-khuc-gia","embeddable":true,"href":"https:\/\/shennan2.tvg.agency\/en\/wp-json\/wp\/v2\/phan-khuc-gia?post=3985"},{"taxonomy":"dang-bon-chua","embeddable":true,"href":"https:\/\/shennan2.tvg.agency\/en\/wp-json\/wp\/v2\/dang-bon-chua?post=3985"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}