Ningbo Zhiqing Industrial Co., Ltd. was Established in 1984, it is one of the largest professional valve manufacturers in China. It covers around 30, 000㎡ and engages more than 500 employee. Our company obtained ISO 9001 certificate for quality system early in 1996, we also passed ISO14001 and OHSAS18001.As our products for export market, we also obtained a lot of certificates , including UL CSA、FM、UPC、NSF ACS、CEEN331 .More information, pls visit our *****