STAINLESS STEEL DUAL PLATE CHECK VALVE

The stainless steel dual plate check valve is an optimal solution for controlling flow direction, effectively preventing fluid backflow, and protecting pumps and pipelines. This valve series has a stainless steel body, a slim and lightweight construction, quick opening and closing, and operates fully automatically on the pressure of the flowing fluid. It is an indispensable valve in water supply and drainage, chemical, food, and pharmaceutical systems.

An Phu Thanh is currently the genuine distributor of stainless steel dual plate check valves in the full size range from DN40 – DN300, in a variety of steel grades (stainless steel 304, stainless steel 316), meeting the flange standards BS 4504, JIS, DIN, and ANSI, with the full pressure ratings PN10, PN16, and PN25.

What is a stainless steel dual plate check valve?

The stainless steel dual plate check valve is a check valve whose opening/closing element consists of 2 half-moon discs (butterfly-wing type) combined with a pin and torsion springs, allowing fluid to pass in one fixed direction and completely blocking reverse flow.

• When there is flow: The fluid pressure pushes the 2 discs folded back, opening the way for the fluid to pass with minimal pressure loss.
• When the flow stops or reverses: The spring force immediately presses the 2 discs back to their original closed position, preventing the fluid from flowing back.

Thanks to the spring-closing mechanism with a short disc stroke, the valve helps minimize water hammer, the leading cause of vibration, pipe bursts, and pump damage.

Construction of the stainless steel dual plate check valve

The stainless steel dual plate check valve has a clamp-type (wafer) connection design and a streamlined construction, including the following parts:

• Body: Cast in one piece from stainless steel, bearing pressure and connecting to the pipeline. Its thin cylindrical design sits neatly between the 2 pipeline flanges.
• Discs: 2 half-moon stainless steel discs rotating about a vertical pin, directly acted on by the flow.
• Pin and hinge mechanism: Supports the movement of the discs between the open and closed positions.
• Seat: Helps limit leakage when the valve is closed, usually made of EPDM or PTFE.

Advantages of the stainless steel dual plate check valve

Corrosion resistance according to the stainless steel grade

Stainless steel can suit many industrial environments, but the level of corrosion resistance depends on the steel grade and the properties of the fluid.

Automatic one-way flow control

The valve operates on the flowing fluid, helping to limit backflow and supporting protection of equipment in the system such as pumps, pipelines, and process equipment when installed in the correct position.

Suitable for many industrial applications

The stainless steel dual plate check valve can be used in many industrial systems, such as:

• Water supply systems and industrial pipelines
• Food and beverage plants
• Pharmaceutical systems
• Chemical systems
• And many other industrial systems

Important notes when installing and using the stainless steel dual plate check valve

For the stainless steel dual plate check valve to operate stably, observe the following points before installation:

• Install in the correct flow direction: Check the flow direction arrow marked on the valve body before installation. Never install the valve against the flow direction of the fluid.
• Installation distance: Do not install the valve right at the pump outlet or at a sharp bend in the pipe (keep a minimum distance of 5D – 10D of the pipe diameter), to avoid turbulent flow that makes the discs vibrate.
• Avoid operating conditions that cause shock: Evaluate the flow rate, flow velocity, and opening/closing conditions to limit vibration or water hammer.
• Check the material before use: Especially for chemicals, high temperatures, or food and pharmaceutical systems.
• Periodic maintenance: Inspect the condition of the discs, the moving mechanism, the sealing parts, and signs of leakage according to the maintenance procedures of the system.

Frequently asked questions

What is the stainless steel dual plate check valve used for?

• The valve allows fluid to flow in one direction and limits reverse flow in the pipeline, helping to protect equipment and the system.

Can the valve be used for chemicals?

• It can be considered depending on the type of chemical, concentration, temperature, pressure, stainless steel grade, and sealing material. Compatibility must be confirmed before use.

What is the difference between 304 and 316 stainless steel valves?

• 316 stainless steel generally has better resistance to chloride corrosion than 304 in many conditions. However, the choice also depends on the composition of the fluid and the actual operating conditions.

Buy stainless steel dual plate check valves from a reputable supplier, An Phu Thanh

An Phu Thanh specializes in supplying industrial valves and pipe fittings for residential and industrial systems, water treatment, and many other projects nationwide. With more than 17 years of operation, we deliver a complete solution from consultation and products to reputable after-sales policies.

• Large ready stock: The full range of sizes from DN40, DN50, DN65, DN80… up to DN300.
• Complete documentation: We commit to providing CO, CQ, VAT… for projects and construction works.
• Dedicated consultation: Our experienced team advises on products suited to the operating conditions and technical requirements of your system.
• Competitive prices and fast delivery: Good discount policies for contractors and dealers nationwide.

If you need a quotation or detailed advice on stainless steel dual plate check valves, please contact An Phu Thanh via Hotline 0946 729 913 for the fastest support!