Zhongshan good valve Co., Ltd places great importance on raw materials used in the manufacturing of ball valve-solenoid operated valve. Each batch of raw materials is selected by our experienced team. When raw materials arrive at our factory, we take good care of processing them. We totally eliminate defective materials from our inspections.. We receive important feedback on how our existing customers' experience FLOS brand by conducting customer surveys through regular evaluation. The survey aims to give us information on how customers value the performance of our brand. The survey is distributed biannually, and the result is compared with earlier results to identify positive or negative trends of the brand.. In order to deliver satisfactory service at FLOS Ball Valve, we have employees who really listen to what our customers have to say and we maintain a dialogue with our customers and take note of their needs. We also work with customer surveys, taking into consideration the feedback we receive..