Dual Plate Wafer Lug Type Check Valve

Dual Plate Wafer Lug Type Check Valve is an automatically opening and closing valve, usually primarily designed to prevent reverse flow of pipeline media. It provide surge protection for pumps, compressors, and similar equipment and is widely used in petrochemical, power plant, water treatment, and other industries. With its core advantages of compact structure as: water hammer resistance, and easy installation so on. So it has become a cost-effective preferred auxiliary device in modern pipeline systems.

I. Dual Plate Wafer Lug Type Check Valve Operating Principle

As a check valve integrating three core technologies—wafer-type connection, lug-type mounting, and dual-plate operation—its body features a thin wafer structure. Eliminating the need for additional flanges, it can be directly clamped between two pipeline flanges. Secured by bolts through its dual lugs, it enables rapid installation/removal and stable connection while significantly saving pipeline space.

Operation requires no external power source, relying entirely on media pressure for automatic opening and closing: During forward flow, pressure overcomes spring tension or self-weight to rotate the symmetrical valve discs, opening the passage with minimal resistance. When flow ceases or reverses, spring force and backflow pressure jointly drive the dual plates to rapidly reseal, instantly blocking reverse flow. This effectively mitigates water hammer effects while reducing pipeline vibration and noise.

II. Dual Plate Wafer Lug Type Check Valve Structural Advantages

Compact Design
The face-to-face length is much shorter than traditional flanged check valves, typically only 1/4–1/8 of their length. This reduces weight, lowers pipe support loads, and makes installation easier in tight spaces.

Excellent Water Hammer Control
The dual-plate symmetrical structure shortens the closing stroke and enables rapid shutoff, helping protect pipelines and equipment from impact damage.

Easy Installation and Maintenance
Lug-type construction with pre-drilled bolt holes allows quick mounting and removal. The valve can be installed horizontally or vertically, with minimal maintenance required during operation.

Reliable Sealing Performance
Depending on the application, metal or resilient seats can be selected. The precise fit between disc and seat ensures low leakage and stable long-term sealing.

Wide Material and Media Compatibility
Available in carbon steel, stainless steel, alloy steel, and other materials, suitable for water, steam, oil, gas, acids, alkalis, and other industrial media.

III. Dual Plate Wafer Lug Type Check Valve Technical Specifications

Size Range: DN15–DN1500 (1/2"–60")

Pressure Rating: PN10–PN420, Class 150–Class 2500

Operating Temperature: –196°C to +560°C (depending on materials)

Connection: Wafer Lug Type, compatible with ASME B16.5 flanges

Testing: API 598 / API 6D

IV. Application Fields of Dual Plate Wafer Lug Type Check Valve

Petrochemical Industry: Oil, chemical, and corrosive media pipelines

Power Plants: Steam, feedwater, and circulating water systems

Water Treatment: Clean water, wastewater, and desalination systems

Building & Municipal Services: Water supply, HVAC, and fire protection pipelines

Other Industries: Natural gas, metallurgy, pharmaceuticals, and food processing

Compared to traditional check valves, Dual Plate Wafer Lug Type Check Valve offers core competitive advantages of compactness, efficiency, reliability, and convenience. It addresses the pain points of bulky traditional valves, cumbersome installation, and inadequate water hammer protection. Through diverse materials and standardized production, it ensures product authority and credibility.