Import Duckbill Check Valves For Concrete Pipe — Buy in Bulk from Supplier in China

Gongyi Liangda Tubes Co., Ltd. supplies duckbill check valves specifically engineered for concrete pipe systems, offering a one‑piece elastomeric construction that eliminates the need for additional fasteners. The product line spans inner diameters from 12 mm (½") up to 2400 mm (96"), matching the outer diameter of most concrete culverts and pressure pipes. Valves are designed to open under a positive differential pressure and close automatically when the pressure reverses, providing reliable backflow prevention in low‑pressure environments. The elastomeric bill is moulded from a single compound, ensuring uniform hardness and sealing performance.

Typical operating pressures range from a few kilopascals up to several hundred kPa, depending on size and material selection. The standard clamp is fabricated from stainless steel 304, though alternative alloys can be supplied on request, and the valve can be fitted directly into a drilled hole in the pipe and sealed by compressing the flange. Cracking pressure is usually between 1 in. and 2 in. (25‑50 mm Hg), resulting in low head loss across the valve. The supplier notes that custom dimensions and specialised rubber compounds are available to meet specific flow or chemical resistance requirements.

These valves are frequently chosen by municipal water authorities, irrigation contractors and civil engineering firms that install concrete drainage networks. Buyers often require bulk quantities for large‑scale projects and will need to confirm packaging - options include plastic bags or wooden boxes - as well as Incoterms for sea freight. Because the listing does not specify minimum order quantity, lead time or certification status, interested parties should request a detailed quotation and request any test reports relevant to their application.

Gongyi Liangda Tubes Co., Ltd. is situated at No. 176, Yong'an Road, Xicun Town, Zhengzhou 450000, Henan, China. The firm is listed as an imported supplier with a harbor trust tier, indicating participation in international trade with verified credentials. Its response statistics show a 0 % response rate and no average response time, so prospective buyers should anticipate follow‑up communication to obtain detailed information.

The company advertises custom‑moulded duckbill check valves for concrete pipe applications, emphasizing the ability to produce any required dimension or rubber compound on request. The listing does not disclose specific certifications, MOQ, lead time or pricing, and advises interested parties to contact the sales team for those details.