{"id":89,"count":5,"description":"Flanged check valve is a pipeline valve that automatically blocks the reverse flow of liquid or gas, protecting the system and equipment from water hammer and emptying of the main. It is connected to the pipeline through flange connections - a gasket and bolts on both sides of the body. It is made of cast iron GG25, GGG40 or GGG50 with EPDM or NBR seals. UKSPAR manufactures this valve taking into account real operational loads. We offer solutions that engineers choose for reliability and durability.\r\n<h2>Flanged check valves range<\/h2>\r\nOur catalog features products for industrial and municipal facilities. Each valve is equipped with a full set of mounting holes at both ends of the body, ensuring a rigid, leak-tight connection to the pipe via a gasket and bolts. Please refer to the general catalog for the complete range of check valves across all connection types. <a href=\"https:\/\/ukspar.ua\/en\/zvorotni-klapany\/\"> check valves<\/a> UKSPAR. You can buy from us:\r\n<ul>\r\n \t<li>spring-loaded poppet valve (disc made of cast iron GG25, EPDM seal);<\/li>\r\n \t<li>ball valve (stainless steel ball, NBR seal);<\/li>\r\n \t<li>rotary valve (disc made of cast iron GG25);<\/li>\r\n \t<li>lift valve (plate made of cast iron GGG40);<\/li>\r\n \t<li>rotary valve with counterweight (disc made of cast iron GGG50) and many other options.<\/li>\r\n<\/ul>\r\nThe designs differ in the principle of closing the shut-off element and their applicability to a specific pipeline position.\r\n<h2>How to choose a flanged check valve<\/h2>\r\nCorrect selection of protective fittings ensures that the pipeline will operate without failures for many years. First of all, they are guided by the nominal diameter of the pipeline. It must exactly match the pipe cross-section so as not to create unnecessary hydraulic resistance. The second criterion is the operating pressure. If water hammer is possible in the system, an increased safety margin is laid. The third factor is the chemical composition of the liquid. For drinking water, environmentally friendly materials are required, for aggressive wastewater or chemicals - resistant alloys. The temperature of the medium is also taken into account, since the choice of material for seals and the body depends on it. It is worth considering the position of the valve on the pipeline separately: rotary and disc structures can usually be mounted both horizontally and vertically, and lifting ones - as a rule, only horizontally, with the flow direction from bottom to top through the seat. Incorrect installation orientation can lead to incomplete closing of the valve and reverse flow of the medium.\r\n<h2>Construction types<\/h2>\r\nThe internal architecture of the shut-off unit determines the speed of the device&#039;s response and the features of its installation on the main:\r\n<ol>\r\n \t<li>A rotary disk is a simple and reliable mechanism that operates under the influence of flow.<\/li>\r\n \t<li>Lift valve \u2013 provides precise shut-off and high tightness.<\/li>\r\n \t<li>Disc type \u2013 used for large diameters and high pressure.<\/li>\r\n<\/ol>\r\nEach version has its own characteristics and is selected according to the operating mode of the pipeline.\r\n<h2>Manufacturing materials<\/h2>\r\nThe bodies of all presented models are made of cast iron of various grades:\r\n<ul>\r\n \t<li>GG25 \u2013 for standard application poppet and rotary valves;<\/li>\r\n \t<li>GGG40 and GGG50 are stronger malleable irons for lift valves and counterweight models where additional mechanical stress is applied to the part.<\/li>\r\n<\/ul>\r\nThe shut-off elements are made of steel (ball) or the same cast iron as the body (plate, disc). Sealing materials include EPDM for water and non-aggressive media (operating temperature typically up to +110\u2026+120\u00b0C) and NBR for media containing oils or petroleum products (operating temperature typically up to +100\u00b0C). Installing the valve also requires flanges of the appropriate diameter and gaskets\u2014these can be selected in the section <a href=\"https:\/\/ukspar.ua\/en\/flanci\/\"> flanges<\/a> UKSPAR.\r\n<h2>How is it different from the interflange type?<\/h2>\r\nThe main difference between the two types of valves is in the body design and installation specifics. The flange valve has its own mounting discs that are joined to the pipe flanges through individual gaskets and are tightened with bolts. This makes the assembly as reliable as possible on large diameters. The interflange analogue is devoid of its own mounting discs and is simply clamped with studs between two pipes. It is more compact and lighter, but the flange type wins in terms of ease of maintenance. It is easier to dismantle from the main for scheduled gasket replacement or cleaning. Pipeline valves of the UKSPAR brand are certified according to the Ukrainian Technical Regulations for Pressure Equipment (certificate of conformity &quot;Ukrsertifikyshn&quot; No. UA.CRT.00034-26), in particular according to the standards DSTU EN 1092-1 (flange connections) and DSTU EN 13709 (steel shut-off valves - gate valves, valves and check valves).\r\n<h2>Areas of application<\/h2>\r\nDue to their reliability and ability to work with various media, flanged check valves are used in many industries:\r\n<ol>\r\n \t<li>Water supply systems \u2013 protection of pumps against backflow and water hammer in main and internal networks.<\/li>\r\n \t<li>Heating systems \u2013 preventing flow mixing and protecting thermal equipment.<\/li>\r\n \t<li>Oil and gas industry \u2013 control of oil, gas and refined product flows in critical areas.<\/li>\r\n \t<li>Energy \u2013 ensuring reliable operation of pipelines at power plants.<\/li>\r\n<\/ol>\r\nAt UKSPAR, the price for a check valve is the most acceptable due to the absence of intermediaries. High quality and delivery throughout Ukraine are guaranteed.","link":"https:\/\/ukspar.ua\/en\/zvorotni-klapany-flancevi\/","name":"Check valves are flanged","slug":"zvorotni-klapany-flancevi","taxonomy":"product_cat","parent":58,"meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/ukspar.ua\/en\/wp-json\/wp\/v2\/product_cat\/89"}],"collection":[{"href":"https:\/\/ukspar.ua\/en\/wp-json\/wp\/v2\/product_cat"}],"about":[{"href":"https:\/\/ukspar.ua\/en\/wp-json\/wp\/v2\/taxonomies\/product_cat"}],"up":[{"embeddable":true,"href":"https:\/\/ukspar.ua\/en\/wp-json\/wp\/v2\/product_cat\/58"}],"wp:post_type":[{"href":"https:\/\/ukspar.ua\/en\/wp-json\/wp\/v2\/product?product_cat=89"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}