Duckbill Valv souvan li te ye tankou: kawoutchou dlo egou chèk valv, ke yo rele tou: tounen presyon fleksib tiyo valv, duckbill valv chèk valv, kawotchou tcheke valv, kawotchou tcheke valv, kawotchou ralanti-fèmen valv chèk la. Modèl prensipal yo se: XL-T, XL-F, XL-X
