Thefufuzani valavu WRASndi valavu yosabwerera yomwe ili yamphamvu kwambiri, yopepuka kulemera kwake komanso yaying'ono kukula kwake poyerekeza ndi valavu yanthawi zonse ya swing check valve kapena life check valve.itamagwiritsa ntchito zitsulo ziwiri zodzaza ndi masika zomangika pa hinji pin.Kuthamanga kumachepa, mbale zomwe zimakhala pafupi ndi torsion spring action popanda kufunikira reverse flow.

tili ndi valavu WRAS ndi ntchito yosindikiza yodabwitsa, koma ndi yotsika kwambiri komanso kutentha kwabwino, chifukwa cha malire a makhalidwe a rubbers.

komanso ndizitsulo mpando wapawiri mbale cheke valavupazikhalidwe zogwira ntchito kwambiri, kutentha kwambiri, kuthamanga kwambiri, kugwirira ntchito molimbika.