{"product_id":"valvula-check-columpio-hierro-ductil-bridas-ansi-150","title":"Ductile Iron Swing Check Valve | ANSI 150 Flanged | Class 150LB","description":"\u003ch2\u003eDuctile Iron Swing Check Valve — ANSI 150 Flange, Automatic Shut-Off, Low-Pressure Loss\u003c\/h2\u003e\n\u003cp\u003eCematic's \u003cstrong\u003eANSI flanged ductile iron swing check valve\u003c\/strong\u003e prevents backflow in industrial piping systems with flanged connections. Its swing mechanism allows fluid to flow in one direction and automatically closes when pressure is reversed.\u003c\/p\u003e\n\u003cp\u003eThis protects pumps, equipment, and piping without operator intervention. In addition, its ductile iron body offers greater mechanical resistance than conventional gray iron, making it a reliable option for medium and high-demand applications.\u003c\/p\u003e\n\u003cp\u003eIts ANSI 150 class flanged connection also facilitates installation and replacement in existing piping systems. Consequently, it is one of the most used solutions in installations where protection against water hammer and backflow is required.\u003c\/p\u003e\n\u003ch3\u003eOperating Principle — Flanged Swing Check Valve\u003c\/h3\u003e\n\u003cp\u003eThe disc swings on a horizontal axis mounted at the top of the body. When the fluid flows in the correct direction, the pressure pushes the disc upwards, opening the passage.\u003c\/p\u003e\n\u003cp\u003eWhen the flow stops or the pressure is reversed, the disc falls by gravity and automatically closes the valve. In this way, the closure does not require electrical or pneumatic energy — gravity acts as a natural closing force.\u003c\/p\u003e\n\u003cp\u003eThe swing design also offers low pressure loss during normal operation, as the disc opens completely without obstructing the fluid passage. For this reason, it is the type of check valve with the lowest pressure drop due to its design among models with their own body and flanges.\u003c\/p\u003e\n\u003ch3\u003eANSI 150 Flanges vs. Wafer Format — When to Choose Flanges\u003c\/h3\u003e\n\u003cp\u003eThe choice between ANSI flanges and wafer format also depends on the type of installation and the operating requirements of the system. The following describes the cases where the version with ANSI 150 flanges is the correct choice:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003ePermanent Process Installations:\u003c\/strong\u003e The flanged valve has its own integrated flanges, so it is mounted as an independent element in the line. This also makes it easy to remove for maintenance or inspection without affecting the pipe flanges.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSystems with Limited Pipe Access:\u003c\/strong\u003e Unlike the wafer format, the flanged check valve is disassembled by screwing only its own flanges. It is not necessary to separate the pipe flanges to remove it. Therefore, it is more practical in spaces where separating the pipe flanges is difficult.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eFrequent Replacement:\u003c\/strong\u003e In installations where the check valve is periodically checked, the flanged connection also facilitates disassembly. Likewise, it does not require moving pipe sections to remove the valve from the system.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eAdvantages of Ductile Iron over Gray Iron\u003c\/h3\u003e\n\u003cp\u003eDuctile iron is also the standard material in hydraulic infrastructure valves. It offers specific technical advantages over conventional gray iron. The main advantages of ductile iron are described below:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eGreater Mechanical Resistance:\u003c\/strong\u003e Ductile iron has greater tensile strength and impact resistance than gray iron, so it better withstands pressure variations, water hammer, and mechanical stresses in the pipeline.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eGreater Ductility:\u003c\/strong\u003e Unlike gray iron, which is brittle, ductile iron deforms before breaking. This characteristic also reduces the risk of sudden fracture under overpressure or impact conditions.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eLong Service Life:\u003c\/strong\u003e Ductile iron also has greater durability in continuous service than gray iron. For this reason, it is the standard specification in hydraulic infrastructure projects where the service life of the component is a relevant economic criterion.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\n\u003cthead\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eParameter\u003c\/th\u003e\n\n\u003cth\u003eValue\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/thead\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eValve Type\u003c\/td\u003e\n\n\u003ctd\u003eSwing check\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eConnection\u003c\/td\u003e\n\n\u003ctd\u003eANSI 150 Flanges (Class 150LB)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBody Material\u003c\/td\u003e\n\n\u003ctd\u003eDuctile Iron\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMechanism\u003c\/td\u003e\n\n\u003ctd\u003eSwing disc with gravity closure\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eWorking Pressure\u003c\/td\u003e\n\n\u003ctd\u003e285 psi @ 38°C Max.\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\u003ch3\u003eFluid Compatibility\u003c\/h3\u003e\n\u003cp\u003eThis \u003cstrong\u003eANSI flanged ductile iron swing check valve\u003c\/strong\u003e is suitable for the most common fluids in water and industrial infrastructure systems. The main groups are described below:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003ePotable water and process water\u003c\/strong\u003e — ductile iron is the standard material in potable water distribution; therefore, it is the usual specification in municipal and industrial hydraulic infrastructure projects\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eRaw water and wastewater\u003c\/strong\u003e — suitable for raw water pumping stations, filtration plants, and wastewater treatment systems; ductile iron also resists mechanical stresses in these applications\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eHVAC fluids — chilled water and return water\u003c\/strong\u003e — compatible with standard HVAC system fluids; for water with aggressive chemical treatments, consult Cematic's technical team\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eAgricultural and industrial irrigation water\u003c\/strong\u003e — in irrigation distribution networks, this valve protects the system from backflow during pump shutdowns; ductile iron also offers adequate durability for irrigation installations with continuous service\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eApplications of the ANSI Flanged Ductile Iron Swing Check Valve\u003c\/h3\u003e\n\u003ch4\u003ePumping Systems\u003c\/h4\u003e\n\u003cp\u003eThe \u003cstrong\u003eANSI flanged ductile iron swing check valve\u003c\/strong\u003e prevents backflow when the pump stops. The swing mechanism also protects the equipment against water hammer and extends the life of the pump and piping. For this reason, it is the standard protection component in centrifugal pump discharge lines in industrial and municipal installations.\u003c\/p\u003e\n\u003ch4\u003eWater and Wastewater Treatment\u003c\/h4\u003e\n\u003cp\u003eIn potable water and wastewater treatment plants, this valve also controls the flow direction in pumping, filtration, and sedimentation stations. Thanks to its ductile iron body, it operates reliably in continuous working conditions.\u003c\/p\u003e\n\u003cp\u003eLikewise, the ANSI 150 flanged connection facilitates valve replacement during preventive maintenance without stopping the entire system.\u003c\/p\u003e\n\u003ch4\u003eAgricultural and Industrial Irrigation Systems\u003c\/h4\u003e\n\u003cp\u003eIn irrigation distribution networks, this valve prevents water backflow due to pressure variations. It also protects the system from pump shutdowns. For this reason, it protects the integrity of the system and reduces pump wear due to reverse flow.\u003c\/p\u003e\n\u003cp\u003eIn addition, the ANSI 150 flanged connection ensures greater mechanical integrity in installations where the valve may be exposed to pipe stresses or vibrations.\u003c\/p\u003e\n\u003ch4\u003eManufacturing and Process Industry\u003c\/h4\u003e\n\u003cp\u003eIn industrial process lines — cooling, fluid distribution — this valve also protects the lines against reverse flow. Consequently, it reduces the risk of cross-contamination between lines and equipment damage due to reverse pressure.\u003c\/p\u003e\n\u003cp\u003eLikewise, ductile iron offers the necessary mechanical resistance for continuous service in industrial process installations.\u003c\/p\u003e\n\u003ch4\u003eHVAC Systems\u003c\/h4\u003e\n\u003cp\u003eIn hot and cold water circuits in HVAC systems, this valve also maintains the correct flow direction. Its swing design also offers low pressure loss during normal operation, so it does not penalize the energy efficiency of the HVAC system.\u003c\/p\u003e\n\u003cp\u003eFor this reason, it is the correct option when a check valve with an ANSI flanged connection is required in large-scale HVAC circuits.\u003c\/p\u003e\n\u003cp\u003eFor the complete range of check valves, see \u003ca href=\"https:\/\/cematic.com.mx\/collections\/valvulas-check\"\u003echeck valves collection →\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #b42222;\"\u003e\u003cstrong\u003eTechnical Data Sheet\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Cematic","offers":[{"title":"2\"","offer_id":52438166667577,"sku":"PC10","price":200.0,"currency_code":"USD","in_stock":true},{"title":"2-1\/2\"","offer_id":52438166700345,"sku":"PC12","price":230.0,"currency_code":"USD","in_stock":true},{"title":"3\"","offer_id":52438166733113,"sku":"PC14","price":300.0,"currency_code":"USD","in_stock":true},{"title":"4\"","offer_id":52438166765881,"sku":"PC18","price":371.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/3917\/1508\/files\/valvula-check-columpio-hierro-bridas-dn50.jpg?v=1776799880","url":"https:\/\/cematic.com\/products\/valvula-check-columpio-hierro-ductil-bridas-ansi-150","provider":"Cematic","version":"1.0","type":"link"}