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In the daily use of valves, various failures often occur. The leakage of valves is the most common one among many failures and it generally includes internal leakage and external leakage. So, what is the difference between the two? The internal leakage of the valve usually refers to the condition that the medium still leaks […]
Nov
High Quality DIN Ball Check Valve Produced by Qingdao Qingguan Valve Co., Ltd.
Through advanced products and process technology, our core business is to develop and produce valves, fire hydrants, and accessories for water and gas distribution, sewage treatment and fire protection. The Qingguan Valve is an international group and is created by the people’s efforts. Our basic strategy, such as innovation, keep our business simple, professional. Close […]