Richest（HK）development limited is located in NanFeng town, ZhangJiagang city , China. Our company mainly focus on R&D, production and sales of mechanical seals and parts , including pump, valve and so on. After continually improving, we have developed a variety of products to meet the demand of domestic and overseas markets. Generally, our products are widely being used in petroleum, chemical, papermaking, marine, and many other fields, providing the matching service. On the other hand, Products sell to all around the world, and we undertake many provincial or even national scientific research programs. Therefore, our company has achieved an extensively awareness and recognition within the industry.