Weifang Supply,Har dware,Weifang Guanyu ¡¡Weifang Guanyu Machinery Manufacture Co., Ltd is a professional enterprise integrating with scientific research, development, production&manufacture, and technique service, is the fixed scientific research base of Shandong Science-Technology University. We mainly produce all kinds stainless steel valve, pipe fittings, speed joint, flanged plate, electromagnetic valve, intelligent valve, and dynamoelectric motor driving valve etc other products and coal-mine safe equipments instrument and minitype fixture. We also can do all kinds stainless steel casting business. With steady capability and credible quality, our products are produced strictly according to national and international advanced standard; and are commonly used in drainage, food, oil chemical, electric power, medicine etc other industries.