Dual Plate Check Valve

Standard: BS5153, EN12334, API 609

Flange drilling is according to BS4504, DIN2501, and ANSI B16.1

Working pressure: 10bar/16bar/25bar

Testing pressure

Shell: 15bar/24bar/37.5bar

Seal: 11bar/17.6bar/27.5bar

Material: Ductile iron GGG40/50 or Cast IronGG25

Disc: Ductile iron/Aluminum Bronze, Stainless steel

Stem: Stainless steel

Seat: EPDM/Viton

Coating: Internal and external with fusion bonded epoxy coating min250μm or Liquid Epoxy painting

Dual plate check valve, as an important device in pipeline systems to prevent medium backflow, provides a solid guarantee for the safe and stable operation of fluid transportation with its unique structural design and excellent performance.

In terms of structural design, a dual plate check valve consists of a valve body, a valve cover, two semi-circular valve discs, and springs. Two valve discs are connected to the valve body through a pin shaft. When there is no medium flow or medium backflow, the valve discs tightly adhere to the valve seat by their own gravity and spring force, forming a seal. When the medium flows forward, the fluid pressure pushes the valve disc to open, allowing the medium to pass smoothly. Compared to single petal design, this double petal structure can effectively reduce the impact force of valve opening and closing, reduce water hammer effect, and the valve size is more compact, lighter in weight, and easy to install and transport.

In terms of performance, dual plate check valves have significant advantages. Its sealing performance is excellent. The valve disc and seat are precision machined and ground, tightly matched, and can effectively prevent the reverse flow of the medium. Even under low pressure conditions, it can maintain good sealing effect. At the same time, the valve has high pressure resistance and corrosion resistance. The valve body is mostly made of carbon steel, stainless steel, alloy steel and other materials, which can adapt to different pressure levels and various corrosive media transportation environments.

In addition, dual plate check valves have low flow resistance, allowing the medium to pass smoothly and unobstructed in the forward direction, which can reduce system energy consumption and improve fluid transport efficiency. Moreover, its structure is simple, with few internal moving parts, stable and reliable operation, easy maintenance and repair, effectively reducing the full life cycle cost of the equipment.

In the application field, dual plate check valves are widely used. In the water supply and drainage system, it can prevent water backflow and ensure water supply safety. In the petrochemical industry, it is used to prevent the backflow of oil products, chemical raw materials and other media in pipelines, avoiding process chaos and equipment damage. In a thermal system, it can prevent steam and hot water from flowing back and maintain the stable operation of the heating system. In the fire protection system, ensure one-way flow of fire water and guarantee the supply of firefighting water at critical moments.

With its exquisite structure, reliable performance, and diverse application scenarios, dual plate check valves have become an indispensable component in various fluid delivery systems, playing a crucial role in ensuring the safe, stable, and efficient operation of the system.