API 594 is an American Petroleum Institute standard that covers the design, materials, dimensions, testing, and inspection of check valves. In particular, it focuses on the specifications for dual plate check valves, also known as wafer check valves, which are widely used in various industries including oil and gas, petrochemical, and refining.The API 594 standard outlines the requirements for dual plate check valves in terms of their construction, pressure-temperature ratings, materials, design validation, and testing procedures. This standard ensures that the valves meet certain performance and safety criteria for applications involving the prevention of reverse flow.Key features of dual plate check valves manufactured to API 594 standards may include a wafer-type design, spring-loaded plates, and a compact, lightweight construction suitable for installation between flanges. These valves are often favored for their low pressure drop, reliable sealing, and ease of installation and maintenance.If you have specific questions about dual plate check valves manufactured to API 594 standards or need further details about their specifications, materials, or testing requirements, please feel free to ask for more information.1. the structure length is short, its structure length is only 1/4 to 1/8 of the traditional flange check valve 2. small size, light weight, its weight is only 1/4 to 1/20 of the traditional micro slow closure check valve 3. the disc of the clamp check valve closes quickly, and the water hammer pressure is small 4. check valve horizontal or vertical pipe can be used, easy to install 5. the clamp check valve flow path is smooth, the fluid resistance is small 6. sensitive action, good sealing performance 7. the disc stroke is short, the clamping check valve closing impact is small 8. the overall structure, simple and compact, beautiful shape 9. long service life, high reliabilityAs a professional API 594 Dual Plate 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	API 594 Dual Plate Check Valve
Nominal diameter	NPS 1/2”, 3/4”, 1”, 1-1/4”, 1-1/2”, 2”, 3”, 4”, 6”, 8” , 10” , 12” , 14”, 16”, 18”, 20” 24”, 28”, 32”, 36”, 40”, 48”
Nominal diameter	Class 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.