Product Introduction
Dual Plate Check Valve has a shorter face-to-face dimension and dual plate design, the end connection options include wafer type, lug type and double-flange type. A wide range of body and trim materials are optional on customer’s request.
Compared to conventional swing check valves, dual plate check valves have the advantage of zero leakage toward outside (no bolted or threaded connections), cost savings, they can be installed in any line orientation, superior seal performance, offer minimal line shock, lower pressure loss and zero seat wear.

Technical Specification
Design Standard: API 594
Size Range: 2"-76" (DN50-DN1900)
Pressure Rating: ASME CLASS 150-2500 (PN16-PN420)
Body Material: Carbon Steel, Stainless Steel, Alloy Steel, Duplex Stainless Steel
End Connection: RF, LUG, RTJ, WAFER, WJ
Operation: None
Fire Safe Design: Yes
Brand: Neway

Working Principle
The check valve is uni-directional. When the medium flows from upstream to downstream side, disc is opened by fluid force; when the medium flows from downstream to upstream side, disc is closed by spring force and fluid pressure, blocking the flow passage.

Applications
This series of valves are widely used in oil & gas production, petroleum refining, petrochemical, pulp & paper, shipbuilding, and other fluid back flow prevention application.

Performance Comparison
The short face to face design inherently makes dual plate check valve and axial check valves(short pattern) lighter and more compact than traditional swing check valves, this will lead to ease of installation and lower operation costs.

Picture Show 


Design Features
-One-piece and short cylinder design with no holes through body wall, no need for external pins or plugs and no leakage.
-Body slot design to fit the hinge pin and allow hinge pin to move only in the direction of flow.
-The integral cast bumper can prevent the request hitting, and reduces the pressing from the dual plate.
-Two independent Torsion Springs ensure valve closure as quick as possible, and reduces water hammer.
-Uninterrupted gasket surface by the fitting, to ensure the effective seal between valve and pipeline.
-10-25% of the weight of conventional swing check valve, to save initial purchase and installation cost.
-Flexible to install in any position allows you to design your piping layout is the most efficient method.
-Dual plate & Flat seat design ensures a better opening and closing performance.

Product Details
Physical Picture of Dual Plate Check Valve：



Delivery, Payment and Service
Payment Terms: Normally 30% down payment before production, 70% balance before delivery.
Warranty: 12 months after installation or 18 months after shipment whichever comes first.
Delivery time: Subject to stock availability at placement or order and factory workloads.
Delivery method: By Express, or by air, or by sea, as your request.
Delivery port: Shanghai or as your request.

FAQ
Q: How light is this dual plate check valve?
A: Dual plate check valves have a short face-to-face dimension and the weight is only about 25% of a comparable size swing check valve.

Q: Is there limit of installation position for this check valve?
A: Dual plate and axial flow check valves can be installed in any position because of disc spring assists the tight closure at any position.

Q: Is this dual plate check valve available for larger O.D. piping systems 36"and above?
A: Yes, the largest size we can offer is 76", because dual plate check valve and axial flow check valve’s internal design minimizes the water hammer problem, so they are recommended and preferred in large O.D. piping systems, compare to traditional swing check valves.