Muyezo wa AWWA ndi The American Water Works Association koyamba kusindikiza zikalata zogwirizana mu 1908. Masiku ano, pali Miyezo yopitilira 190 ya AWWA.Kuchokera ku gwero kupita ku zosungirako, kuchokera ku chithandizo mpaka kugawa, Miyezo ya AWWA imaphimba zinthu ndi njira zokhudzana ndi madera onse opangira madzi ndi kupereka.AWWA C504 ndi yoyimira, ndi mtundu wa valavu yagulugufe.
AWWA C504 butterfly valve ili ndi mitundu iwiri, mizere yapakatikati yosindikizira yofewa komanso yosindikizira yofewa yapawiri, nthawi zambiri, mtengo wa chisindikizo chofewa chapakatikati udzakhala wotsika mtengo kuposa wawiri eccentric, izi zimachitika kawirikawiri malinga ndi zomwe makasitomala amafuna.Nthawi zambiri kuthamanga kwa ntchito kwa AWWA C504 ndi 125psi, 150psi, 250psi, kuthamanga kwa kugwirizana kwa flange ndi CL125, CL150, CL250.
Valavu ya butterfly ya AWWA C504 imagwiritsidwa ntchito makamaka pochiza madzi, sing'anga yofunika ndi madzi opanda zonyansa, zizindikiro za chisindikizo cha mphira zimalimbitsa kusindikiza kwa valve, kotero kuti valavu ikhoza kukwaniritsa 0 kutuluka.Posankha zakuthupi za valve, kawirikawiri chitsulo cha ductile ndicho chachikulu, chotsatiridwa ndi chitsulo cha carbon ndi chotheka.Kusankhidwa kwa mphete yosindikizira ya vavu, EPDM, NBR, NR zilipo, malinga ndi zomwe kasitomala akufuna kuti asankhe.
Poyerekeza ndi ma valavu agulugufe a EN558-13,14, valavu yagulugufe ya AWWA C504 ili ndi thupi lokulirapo komanso lopindika m'mimba mwake, ndipo palinso kusiyana pang'ono pamiyeso ina, yomwe imawoneka patebulo lotsatirali.Inde, pa ntchitoyi, palibe kusiyana kwakukulu ndi ma valve agulugufe osindikizidwa ndi mphira.
Ndi opanga ati omwe angapange vavu yagulugufe ya AWWA C504 ku China?Monga ndikudziwira, palibe opanga ambiri omwe angathe kupanga valavu yagulugufe ya AWWA C504, mafakitale ambiri ali ndi chidziwitso chochuluka pakupanga EN558-13 / 14 mndandanda wa butterfly valve, ndipo alibe zambiri pakupanga AWWA C504 valavu yagulugufe, Tianjin Zhongfa. Vavu ndi m'modzi mwa opanga omwe amatha kupanga valavu yagulugufe ya AWWA C504, Zhongfa Valve ili ndi nkhungu yake komanso malo ake opangira, omwe amatha kumaliza kupanga valavu yagulugufe ndi mtundu komanso kuchuluka kwake.
Zotsatirazi ndi valavu yagulugufe ya AWWA C504 yopangidwa ndi Tianjin Zhongfa Valve, Ngati mukufuna kudziwa zambiri za mankhwala a AWWA C504, mutha kulankhula nafe.
