Dual Plate Check Valve

As a professional valve manufacturer, Waits can support the production of customized dual plate check valves to better meet the needs of different customers. In terms of sealing, this check valve can be in various forms such as rubber, PTFE, and body. Customization can meet different standards such as API/DIN/JIS according to customer needs.

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Product Description

The butterfly plate of the dual plate check valve is two semicircles, and the spring-loaded valve disc is suspended on the central vertical pin. When the valve is opened, the combined force of the fluid is at the center of the valve disc sealing surface, and the point of action of the spring support force is at the center of the valve disc surface, so that the root of the valve disc opens first, thereby avoiding the wear of the sealing surface that occurs when the valve disc of the old conventional valve is opened, and effectively improving the durability.
When the flow rate slows down, under the action of the torsion spring reaction force, the valve disc gradually approaches the valve seat, and the dual plate check valve enters the slow closing stage. When the fluid flows back, the combined action of the valve disc force and the torsion spring reaction force increases the closing of the valve disc accordingly, entering the fast closing stage. This effectively reduces the impact of water hammer and reduces the harm of water hammer. When closing, the action of the spring force point causes the top of the valve disc to close first, preventing the valve disc root from biting.

Implementation Standards

Design Standard	API 594, GOST
Flange standards	ASME B16.5, DIN2543~2548, API 605, ASME B16.47, MSS SP-44, ISO7005-1.
End Connection	Wafer, Double Flange, Lug, etc.
Inspection & Test	API 598, GOST
Face to Face	ASME B16.10, GOST
Pressure and temperature levels	ASME B16.34, DIN2401
Anti-corrosion design	NACE MR 0103, NACE MR 0175.ISO15156

Application

Size	2"-60", DN50-DN1500
Pressure Rating	Class 150-2500, PN10-PN420
Operating Temperature	-60°C~ 450°C
Application range	It is suitable for various media such as water, steam oil, nitric acid, acetic acid, strong oxidizing media, etc.
Body Material	Carbon Steel, Stainless Steel, Duplex Stainless Steel, Alloy Steel, Monel, Al Bronze, etc.
Valve plate	Forgings：A105, A182 F304, F304L, F316, F316L,F51, F53, B148,A350 LF2, LF3, LF5, Monel, Castings：A216 WCB, CF3, CF8, CF3M, CF8M, 4A, 5A, C95800, LCB, LCC, LC2
Valve seat	Body material, 13CR, stainless steel 304/316, monel, cemented carbide, alloy 20, copper alloy, etc.
Valve stem	A182 F6a,17-4PH，F304 F316, F51, ...

Performance Features

1. The dual plate check valve is composed of valve body, valve disc, valve shaft and spring, etc. It adopts clamp-type connection and compact structure.
2. The butterfly plate is two semicircles, and the spring is used for forced reset. The sealing surface can be welded with wear-resistant material or lined with rubber. It has a wide range of use and reliable sealing.
3. The closing stroke of the valve disc is short, and it is spring-loaded, with fast closing speed, which can reduce water hammer phenomenon.
4. It is suitable for occasions with limited installation space, and can be used for horizontal or vertical pipelines.
5. It can be applied to various media such as water, steam oil, nitric acid, acetic acid, strong oxidizing medium, etc.

Dual Plate Check Valve