Kamfanin Zhejiang Guangwo Valve Co., Ltd. da aka kafa a shekarar 2016 kuma yana Wenzhou, na kasar Sin, yana da fadin fadin murabba'in mita 40,00, fiye da ma'aikata 70 da kuma wurare sama da 100.
Babban samfuran Guangwo sun haɗa da bawuloli na kofa, bawul ɗin duniya, bawul ɗin duba da matsi da aka yi a cikin ƙarfe na carbon, gami da bakin karfe.Ana kera bawuloli bisa ga ka'idojin ANSI, API, DIN, GOST da GB.