Shanghai Haoyang Pump Valve Manufacturing Co., Ltd. was established in 2006. We have been specializing in diaphragm pumps for 18 years. HY-series of pneumatic diaphragm pumps have the advantages of environmentally friendly, energy-saving, explosion-proof, multi-occasion, highly-efficient and stable, stall free. The products are widely used in various industries such as coating, petroleum, metallurgy, chemical engineering, mine, ceramics food & drinks, pharmacy, printing, water treatment and so on. We sincerely invite all the agents to join us and strive for win-win results.