zhejiang huaershi auto-control instrument co., ltd. is a valve instrument technology enterprise integrating professional r&d, production, sales and service. beginning in 1989, professional manufacturing of pneumatic valves and pneumatic actuators. there are more than 100 employees and a building area of nearly 20,000 square meters.the company currently has 28 patents and 4 municipal high-tech project products. in 2004, it has successively won the honorary titles of longwan district high-tech enterprise, well-known trademark, contract-abiding and promise-keeping enterprise, small and medium-sized high-tech enterprise in zhejiang provinee, and national high-tech enterprise. the products produced have obtained iso9001,ts, sil, ce and other quality related certifications.hes has provided a large number of pneumatic actuators, various pneumatic ball valves, and various pneumatic butterfly valves for all walks of life. whether it is now or in the future