BS 1868 is a British Standard that specifies the requirements for steel check valves or non-return valves with metallic seats for use in industries such as petroleum, petrochemical, and allied industries. This standard covers dimensions, pressure-temperature ratings, materials, and testing requirements for swing check valves.In the context of a swing check valve manufactured in accordance with BS 1868, it would be designed to meet the specific dimensional and performance criteria outlined in the standard. This ensures that the valve can effectively prevent backflow and meets the necessary safety and quality standards for its intended application.Some of the key features of a swing check valve manufactured to BS 1868 standards may include a bolted cover, renewable seat rings, and a swing-type disc. These valves are often used in high-pressure and high-temperature applications where preventing backflow is essential.If you have specific questions about a swing check valve manufactured to BS 1868 standards or need further details about its specifications, materials, or testing requirements, please let me know, and I would be happy to assist further.1. Valve body and valve cover connection form: Class150~ Class600 using plug valve cover; Class900 to Class2500 adopts self-pressurized sealing valve cover. 2. Opening and closing parts (valve disc) design: the valve disc is designed as swing type, with sufficient strength and stiffness, and the sealing surface of the valve disc can be surfacing welding gold material or inlaid non-metal material according to user requirements. 3. Valve cover middle gasket conventional form: Class150 check valve using stainless steel graphite composite gasket; C|ass300 check valve with stainless steel graphite wound gasket; Class600 check valve can be used stainless steel stone 4. Ink winding gasket can also be used metal ring gasket; The Class900 to Class2500 check valves use self-pressure sealing metal rings. 5. Operation form: Check valve automatically opens or closes according to the medium flow condition. 6. Rocker design: The rocker has enough strength, enough freedom to close the valve disc, and is equipped with a limiting device to prevent the opening position from being too high to close. 7. Lifting ring design: The large-caliber check valve is designed with lifting ring and support frame, which is convenient for lifting.As a professional BS 1868 Swing Check Valve and exporter, we promise to provide customers with high-quality after-sales service, including the following: 1.Provide product usage guidance and maintenance suggestions. 2.For failures caused by product quality problems, we promise to provide technical support and troubleshooting within the shortest possible time. 3.Except for damage caused by normal use, we provide free repair and replacement services. 4.We promise to respond quickly to customer service needs during the product warranty period. 5. We provide long-term technical support, online consulting and training services. Our goal is to provide customers with the best service experience and make customers' experience more pleasant and easy.

Product	BS 1868 Swing Check Valve
Nominal diameter	NPS 2”, 3”, 4”, 6”, 8” , 10” , 12” , 14”, 16”, 18”, 20” 24”, 28”, 32”, 36”, 40”, 48”
Nominal diameter	Class 150, 300, 600, 900, 1500, 2500.
End Connection	Flanged (RF, RTJ, FF), Welded.
Operation	Heavy Hammer, None
Materials	A216 WCB, WC6, WC9, A352 LCB, A351 CF8, CF8M, CF3, CF3M, A995 4A, A995 5A, A995 6A, Alloy 20, Monel, Inconel, Hastelloy, Aluminum Bronze and other special alloy.
	A105, LF2, F5, F11, F22, A182 F304 (L), F316 (L), F347, F321, F51, Alloy 20, Monel, Inconel, Hastelloy
Structure	Bolted Cover, Pressure Seal Cover
Design and Manufacturer	API 6D
Face to Face	ASME B16.10
End Connection	ASME B16.5 (RF & RTJ)
	ASME B16.25 (BW)
Test and Inspection	API 598
Other	NACE MR-0175, NACE MR-0103, ISO 15848, API624
Also available per	PT, UT, RT,MT.

During the opening and closing process of the forged steel globe valve, because the friction between the disc and the sealing surface of the valve body is smaller than that of the gate valve, it is wear-resistant. The opening or closing stroke of the valve stem is relatively short, and it has a very reliable cut-off function, and because the change of the valve seat port is proportional to the stroke of the valve disc, it is very suitable for the adjustment of the flow rate. Therefore, this type of valve is very suitable for cut-off or regulation and throttling.