ZHEJIANG TOSVAL INNDUSTRY CO., LTD an kafa ta ne a cikin shekarun 1980 lokacin da ƙarni na farko ya fara da sunan Yuhuan Tongxing Valve Co., Ltd, Abubuwan samin mu na farko sun haɗa da dubban bayanai dalla-dalla a cikin jerin sama da 20 wanda ya haɗa da bawul na farin ƙarfe, Bawul ɗin Mita na ruwa. , Gas ball bawul da bawul kusurwa, bibcock da bututu kayan aiki, da dai sauransu ƙarfin fitarwa na shekara-shekara yana game da miliyan 50 inji mai kwakwalwa.