The dual plate check valve is an automatic mechanical valve that operates by opening with the forward flow and closing in response to a reversal inflow. This type of valve is designed with two spring-loaded plates attached to the central hinge screw. As the flow begins to decrease, the torsion spring movement kicks in, causing the plates to close just in time to prevent any flow reversal from occurring.

 

When it comes to wafer type connections for valves, they are typically mounted in between flanges, with the bolts of the flanges being attached to the valve. In some cases, the valve body may have cantering holes in order to ensure that the valve is in the proper position between the flanges.
On the other hand, lugged type connections are similar to wafer type, but they do have some slight variations. Here, the lugged holes are drilled and each bolt hole on the flanges has a corresponding lug hole. Furthermore, there are usually two bolts from each flange, with one bolt coming from either side of the valve.

 

 

In pipe systems, wafer check valves play a crucial role in preventing the backflow of fluids and ensuring safe installation. These valves are highly reliable, efficient, and come with minimal flow resistance. As a result, they find extensive applications in the petrochemical, food, textile, pharmaceuticals, water supply and drainage, and energy sectors. Moreover, they act as efficient one-way valves providing safety and non-returning properties.

 

 

We specialize in the design and manufacturing of various industrial valves, including API6D valves, API594 valves, and ASME B16.34 valves. Our team works diligently to ensure that our products meet the high standards set by these industry regulations. With our expertise and experience, we are committed to delivering valves that are reliable, efficient, and of the highest quality. Whether you need valves for oil and gas, petrochemical, or any other industry, we have the capabilities to meet your specific requirements. Trust us for exceptional valve solutions that are engineered for optimum performance and longevity.

·Test and inspection: API598

·Face to face dimensions: API594, API6D

There are several standards for installing between flanges, including ASME B16.5, JIS, BS4504, DIN2501, and EN1092. It is important to ensure that the proper standard is followed to ensure a secure and effective installation. Whether you are working with pipes, valves, or other equipment, following the appropriate installation standards is vital to ensure the safety and reliability of your system. So be sure to take the time to familiarize yourself with the appropriate standards and take the necessary steps to install your equipment correctly.

 

 

·Size: 1-1/2” to 60”

·Class: 150LB to 2500LB

There are different types of check valves available in the market, including wafer check valve, lug type wafer check valve, and double flanged check valve. These valves can come with a double plate or single plate and can feature a metal seat or soft seat. Some check valves also have a spring return option. Regardless of the type of valve you choose, you can be assured of its functionality and reliability. The valve will work efficiently and accurately to prevent backflow in your piping system, ensuring the consistent and safe functioning of your industrial processes.

Our products are made from a wide range of materials including carbon steel, stainless steel, and alloy steel such as WCB, WCC, WC1, WC6, WC9, C5, C12, CF8, CF8M, CF3, CF3M, CN7M, LCB, LCC, duplex stainless steel, Monel, alloy 20, Al-bronze C95400, cast iron, and ductile iron. We ensure that our materials are of the highest quality in order to provide our customers with durable and reliable products. Whether you require carbon steel for its strength and toughness, or stainless steel for its corrosion resistance, we have the materials and expertise to fulfill your needs. At our company, we are committed to providing the best materials and products to our customers, every time.

 

 

The valve operates by opening its disc when fluid flows in the intended direction, thereby allowing the fluid to pass. However, when there is a stoppage or a reversal in the flow direction, the disc automatically swings back and seals the valve to prevent backflow. In this way, the valve ensures that the fluid flows only in the desired direction and prevents any potential damage or disruption caused by backflow.

 

 

One advantage of compact design is that it occupies less space compared to other check valve types. This feature makes it particularly suitable for situations where there is limited space available for installation.

Installation is a breeze with these devices as they can be easily installed between two flanges, without the requirement of any extra components.

The advantage of using wafer check valves lies in their low pressure drop. This is because these valves have a straight-through flow path, ensuring that there is minimal resistance against the flow of fluid when the valve is fully open.

 

API594 Cast Steel Dual Plate Wafer Check Valve

 

No.	Part Name	Material
1	Lifting ring bolt	Stainless steel
2	Screw	Stainless steel
3	Axle bushing	Stainless steel
4	Spring	Inconel X-750
5	Body	WCB, CF8,CF8M,CF3,CF3M,AL-BRONZE
6	Disc	WCB,CF8,CF8M,CF3M,AL-BRONZE
7	Disc hinge pin axle	Stainless steel
8	Pin axle bearing	Stainless steel
9	Plate	Stainless steel
10	Sealing face	Metal, EPDM, VITON, BUNA-N and NBR

 

 

150LB, 300LB, 600LB, 900LB, 1500LB, 2500LB

Pressure	Size	2	2-1/2	3	4	5	6	8	10	12	14	16	18	20	24
150LB	L	60	67	73	73	86	98	127	146	181	184	191	203	219	222
	D1	103	122	135	173	195	220	277	337	407	448	512	547	604	715
	Wt.(kg)	2	3	4	6	8	13	25	39	64	85	114	138	163	285
300LB	L	60	67	73	73	86	98	127	146	181	222	232	264	292	318
	D1	110	128	147	179	214	249	305	359	420	483	537	594	652	772
	Wt.(kg)	3	4	6	8	15	18	31	51	83	117	190	200	265	410
600LB	L	60	67	73	79	105	136	165	213	229	273	305	362	368	438
	D1	110	128	147	191	239	264	318	398	455	490	562	610	680	786
	Wt.(kg)	4	5	8	11	20	26	55	103	140	223	360	395	518	836
900LB	L	70	83	83	102	110	159	206	241	292	356	384	451	451	495
	D1	140	162	165	204	245	286	356	432	495	518	572	635	695	835
	Wt.(kg)	8	11	14	20	30	45	84	145	220	350	470	605	820	1050
1500LB	L	70	83	83	102	110	159	206	248	305	356	384	　	Â	Â
	D1	140	162	172	207	252	280	350	433	518	576	639	　	Â	Â
	Wt.(kg)	8	11	8	11	14	20	30	45	84	145	220	　	Â	Â
2500LB	L	70	83	86	105	110	159	206	254	305	　	Â	Â	Â	Â
	D1	143	166	194	232	277	315	385	474	547	　	Â	Â	Â	Â
	Wt.(kg)	10	18	26	40	59	90	150	240	440	　	Â	Â	Â	Â

 

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