{"id":18382,"date":"2025-06-14T02:10:56","date_gmt":"2025-06-14T02:10:56","guid":{"rendered":"https:\/\/oudianvalve.com\/?post_type=product&p=18382"},"modified":"2025-06-14T02:18:24","modified_gmt":"2025-06-14T02:18:24","slug":"astm-a890-4a-ball-valve-150lb-2-inch-rf-end","status":"publish","type":"product","link":"https:\/\/oudianvalve.com\/es\/products\/ball-valves\/astm-a890-4a-ball-valve-150lb-2-inch-rf-end\/","title":{"rendered":"V\u00e1lvula de bola ASTM A890 4A, 150 lb, 2 pulgadas, extremo RF"},"content":{"rendered":"

Descripci\u00f3n de la v\u00e1lvula:
\nTipo de v\u00e1lvula: v\u00e1lvula de bola flotante
\nMaterial del cuerpo: 2205.
\nDi\u00e1metro nominal: DN80
\nClasificaci\u00f3n de presi\u00f3n: PN25
\nConexi\u00f3n final: Brida RF
\nTemperatura de trabajo: -29\u2103~+200\u2103.
\nFuncionamiento: Palanca.<\/p>\n

ASTM A890 4A\u00a0 Ball Valve Product Analysis
\nI. Floating Structural Design and Functional Characteristics
\n4A American Standard Ball Valve adopts a floating flange connection structure. Its core design is based on the adaptive displacement of the ball under medium pressure, and the sealing is achieved by dynamically pressing the valve seat. This structure combines flexibility and reliability, and its specific features are as follows:<\/p>\n

Dynamic sealing mechanism: The ball moves toward the outlet valve seat under the thrust of the medium, forming a double sealing effect (metal + soft seal), which is suitable for high pressure difference environment, and the sealing level can reach level VI.<\/p>\n

Modular maintenance design: The valve seat and sealing ring adopt detachable modules, which can be replaced without removing the valve body, significantly reducing maintenance costs.<\/p>\n

Anti-interference performance optimization: An anti-blowout structure is added between the valve stem and the ball to prevent the valve stem from being detached due to the impact of high-pressure media, thereby improving safety.<\/p>\n

Low-torque operation: The combination of the floating ball and the PTFE (polytetrafluoroethylene) valve seat reduces the friction coefficient, reduces the manual operation torque by 30%, and makes the selection of electric\/pneumatic actuators more flexible.<\/p>\n

2. Comprehensive performance evaluation of 4A American standard ball valve
\nCore advantages:<\/p>\n

Adaptability to extreme environments: 4A duplex steel (corresponding to ASTM A995 Gr.4A or A890 Gr.4A) has both high strength and corrosion resistance through austenite-ferrite duplex structure, and its resistance to chloride stress corrosion is more than 5 times that of 304 stainless steel. It is suitable for seawater desalination, oil and gas field sulfur-containing media and other scenarios.<\/p>\n

Wide temperature range stability: The operating temperature covers -46\u2103 to 300\u2103, and the valve seat material can be enhanced PTFE or metal hard seal to meet the transportation needs of high-temperature steam and low-temperature liquefied natural gas (LNG).<\/p>\n

Fluid zero leakage guarantee: Passed the bidirectional sealing test of API 598 standard, the leakage rate is less than 0.1\u00d7DN mm\u00b3\/s, meeting the strict environmental protection requirements.<\/p>\n

Limitations:<\/p>\n

Cost sensitivity: The material cost of 4A duplex steel is about 40% higher than that of ordinary austenitic stainless steel, and the forging and heat treatment processes are complicated, resulting in a high overall valve cost.<\/p>\n

Installation accuracy requirements: The floating structure needs to strictly calibrate the pipe coaxiality. Deviations exceeding 0.5\u00b0 may cause uneven wear on the sealing surface.<\/p>\n

III. Material properties and mechanical parameters of 4A duplex steel
\nChemical composition (ASTM A995 Gr.4A):<\/p>\n

Cr (24-26%): forms a dense oxide film to resist pitting and crevice corrosion;<\/p>\n

Ni (6-8%): balances the austenite phase ratio and improves low-temperature toughness;<\/p>\n

Mo (3-4%): enhances resistance to reducing acid corrosion;<\/p>\n

N (0.2-0.3%): replaces part of the nickel element, optimizes cost and improves strength.<\/p>\n

Mechanical properties:<\/p>\n

Tensile strength: 820-930 MPa, better than 620 MPa of ordinary duplex steel (such as 2205);<\/p>\n

Yield strength: \u2265550 MPa, suitable for high-pressure pipeline systems;<\/p>\n

Impact toughness: Charpy V-notch impact energy \u226540 J at -46\u2103, suitable for extremely cold environments;<\/p>\n

Hardness control: HRC\u226432, to avoid brittle failure of the sealing surface.<\/p>\n

IV. Manufacturing standards and certification system
\nThe manufacturing of 4A American standard ball valves follows the following domestic and international standards to ensure reliability throughout the life cycle:<\/p>\n

Material specifications:<\/p>\n

ASTM A995\/A890: specifies casting composition and heat treatment process;<\/p>\n

ASTM A182 F51: Forging processing standards to ensure the strength of valve stems and balls.<\/p>\n

Structural design:<\/p>\n

API 6D\/API 608: defines valve size, pressure rating and test methods;<\/p>\n

ASME B16.34: Flange connection and pressure boundary design criteria.<\/p>\n

Test certification:<\/p>\n

ISO 5208: Sealing performance classification test;<\/p>\n

NACE MR0175: Hydrogen sulfide environment cracking resistance verification, suitable for acidic conditions in oil and gas fields.<\/p>\n

V. Application scenarios and selection recommendations
\n4A American standard ball valves are particularly outstanding in the following fields:<\/p>\n

Marine engineering: seawater cooling system, submarine pipeline, resistance to chloride ion corrosion and biological attachment;<\/p>\n

Chemical process: sulfuric acid and hydrochloric acid medium transportation, tolerance to strong acid environment with pH<2;<\/p>\n

Energy field: high-pressure wellhead control containing H\u2082S and CO\u2082 in shale gas extraction to prevent sulfide stress corrosion cracking (SSCC).<\/p>\n

Things to pay attention to when selecting:<\/p>\n

Sealing form: soft seal (PTFE) is suitable for clean media, hard seal (tungsten carbide) is used for fluids containing particles;<\/p>\n

Actuator matching: select pneumatic, electric or turbine drive according to pipeline pressure and response speed.<\/p>\n

VI. 4A American standard ball valve applicable pressure rating table<\/p>\n

IV. Campo de aplicaci\u00f3n de la v\u00e1lvula de bola de titanio con brida<\/p>\n

Petroqu\u00edmica: Aplicable a diversas tuber\u00edas de medios en las industrias del petr\u00f3leo, qu\u00edmica, metalurgia y otras, como medios \u00e1cidos, alcalinos, de alta temperatura, alta presi\u00f3n, etc.
\nAeroespacial: Aplicable a varios sistemas de tuber\u00edas en el campo aeroespacial, como sistemas hidr\u00e1ulicos, sistemas de combustible, sistemas neum\u00e1ticos, etc.
\nDesarrollo oce\u00e1nico: aplicable a diversos sistemas de tuber\u00edas de medios en el campo del desarrollo oce\u00e1nico, como tratamiento de agua de mar, extracci\u00f3n de petr\u00f3leo en alta mar, etc.
\nProducci\u00f3n m\u00e9dica: aplicable a diversos sistemas de tuber\u00edas de medios en el campo de la producci\u00f3n m\u00e9dica, como fabricaci\u00f3n de equipos, fermentaci\u00f3n biol\u00f3gica, etc.<\/p>\n

Tabla de aplicaci\u00f3n del calibre de presi\u00f3n de la v\u00e1lvula de bola de titanio con tecnolog\u00eda de prensado isost\u00e1tico en caliente<\/p>\n

Podemos producir v\u00e1lvulas de bola 2205, v\u00e1lvulas de compuerta 2205, v\u00e1lvulas de globo 2205, v\u00e1lvulas de retenci\u00f3n 2205, etc.<\/p>\n

6. Tabla de clasificaci\u00f3n de presi\u00f3n aplicable de la v\u00e1lvula de bola ASTM A890 4A:<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Presi\u00f3n nominal o nivel de presi\u00f3n<\/td>\n\u516c\u79f0\u901a\u5f84DN\/NPS\uff08mm\/in\uff09<\/td>\n<\/tr>\n
15<\/td>\n20<\/td>\n25<\/td>\n32<\/td>\n40<\/td>\n50<\/td>\n65<\/td>\n80<\/td>\n100<\/td>\n125<\/td>\n150<\/td>\n200<\/td>\n250<\/td>\n<\/tr>\n
1\/2<\/td>\n3\/4<\/td>\n1<\/td>\n11\/4<\/td>\n11\/2<\/td>\n2<\/td>\n21\/2<\/td>\n3<\/td>\n4<\/td>\n5<\/td>\n6<\/td>\n8<\/td>\n10<\/td>\n<\/tr>\n
PN16<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/td>\n<\/tr>\n
PN25<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/td>\n<\/tr>\n
PN40<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/td>\n<\/tr>\n
PN63<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
PN100<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
PN160<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
Clase 150 (PN20)<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/tr>\n
Clase 300 (PN50)<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/td>\n<\/tr>\n
Clase 600 (PN110)<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
Clase 900 (PN150)<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
Clase 1500\/PN260<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
JIS 10K<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/tr>\n
JIS 20K<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n\u221a<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

China ASTM A890 4A Ball Valve Manufacturer ,OUdian Supplies ASTM A890 4A Floating Ball Valve, ASTM A890 4A \u00a0Floating Ball Valve, 2 Inch ASTM A890 4A Ball Valve, 150lb ASTM A890 4A\u00a0 Floating Ball Valve.<\/p>","protected":false},"excerpt":{"rendered":"

Est\u00e1ndar de dise\u00f1o: API 6D\/API 608
\nA prueba de fuego: API 607\/6FA
\nClasificaciones de temperatura de presi\u00f3n: ASME B16.34
\nRango de tama\u00f1os: 2\u201d a 48\u201d (DN50-DN1200)
\nPuerto: paso total o paso reducido
\nRango de presi\u00f3n: 150 lb a 2500 lb
\nConexiones finales: RF con bridas, RTJ, soldadura a tope
\nTipo de bola: bola s\u00f3lida forjada
\nDimensiones del extremo bridado: ASME B16.5 (24\u201d y menos), ASME B16.47 Serie A o B (m\u00e1s de 24\u201d)
\nDimensiones del extremo soldado a tope: ASME B16.25
\nDimensiones cara a cara: ASME B16.10
\nInspecci\u00f3n y Pruebas: API 6D
\nMateriales del cuerpo: A105\/A105N, F304, F316, F316L, F51, F53, F55, C95800, UNS N08825, UNS N06625.
\nMateriales del asiento: PTFE, RPTFE, DEVLON, NYLON, PEEK, asiento met\u00e1lico con TCC\/STL\/Ni.<\/p>","protected":false},"featured_media":18383,"template":"","meta":{"advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false},"product_brand":[],"product_cat":[83],"product_tag":[397,396,395,393,394],"class_list":{"0":"post-18382","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-ball-valves","7":"product_tag-150lb-astm-a890-4a-floating-ball-valve","8":"product_tag-2-inch-astm-a890-4a-ball-valve","9":"product_tag-astm-a890-4a-floating-ball-valve","10":"product_tag-china-astm-a890-4a-ball-valve-manufacturer","11":"product_tag-oudian-supplies-astm-a890-4a-floating-ball-valve","13":"first","14":"instock","15":"shipping-taxable","16":"product-type-simple"},"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/oudianvalve.com\/es\/wp-json\/wp\/v2\/product\/18382","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oudianvalve.com\/es\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/oudianvalve.com\/es\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oudianvalve.com\/es\/wp-json\/wp\/v2\/media\/18383"}],"wp:attachment":[{"href":"https:\/\/oudianvalve.com\/es\/wp-json\/wp\/v2\/media?parent=18382"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/oudianvalve.com\/es\/wp-json\/wp\/v2\/product_brand?post=18382"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/oudianvalve.com\/es\/wp-json\/wp\/v2\/product_cat?post=18382"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/oudianvalve.com\/es\/wp-json\/wp\/v2\/product_tag?post=18382"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}