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Industrial and commercial scenarios often face three major challenges: continuous operation, complex media and pressure fluctuations. Factory water supply and drainage require fittings with stable pre...
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Our UPVC Flanged Flap Check Valve (Swing Flap Check Valve with Flanged Ends) is a high-flow backflow prevention valve designed for direct flanged installation in large-diameter piping systems. Featuring an internal hinged flap mechanism, this valve opens wide under minimal forward flow pressure, providing maximum fluid passage with low head loss. The integrated heavy-duty flanged ends bolt securely to standard companion flanges, offering high joint rigidity and resistance to piping stress. Built entirely from chemical-grade UPVC with durable elastomeric flap face seals, it delivers reliable backflow shutoff without the rust, scaling, or binding associated with metallic check valves.
Technical & Design Advantages:
Direct Flange Integration: Heavy-walled flanged ends conform to international standards for rigid connection to flanged piping.
Low-Resistance Swinging Flap: Internal flap swings open completely to accommodate high fluid volumes with minimal pressure drop.
Non-Metallic Corrosion Protection: All-plastic body structure and chemical-resistant flap arm prevent corrosion and fluid contamination.
Top Inspection Cover Plate: Bolted top cover allows fast internal inspection, cleaning, and flap seat replacement on site.
Zhejiang Feiya Plastic Co., Ltd. is located in Zhejiang Province, adjacent to Yiwu — the world‑renowned capital of small commodities. It enjoys convenient transport links to coastal cities including Shanghai, Hangzhou, Ningbo and Taizhou, backed by well‑developed logistics networks.
Our journey started in 1992 as Jiangshan Sanjin Machinery & Hardware Factory. We strategically turned to PVC piping production in 2001 and registered our proprietary FEIYA brand in 2002. With over 30 years of industrial expertise, our 40‑acre factory boasts a building area of 50,000 m². As an original manufacturer for plastic pipes, fittings and valves, we serve domestic markets and export our products to more than 100 countries around the globe.
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