Since establishment, STONE has been a rapidly expanding force in the industrial valve industry.Our innovations in the engineering:design and manufacturing have given us a reputation for superior quality.Our entire products are produced under our production & process control system in every step of manufacturing so that ensure each valve that leaves STU production facility is qualified and meet or exceed client requirements.

Our major certifications include ISO 9001:2008, ISO 14001, PED(CE),API 6A,API 6D,API 600, API 607, etc.. Product range covers gate valve,globe valve,check valve, ball valve, wellhead equipment and a variety of special valves which are widely used in oil and gas,chemical,power,shipbuilding,mining,water treatment and industrial systems. Especially for our special alloy materials valves which has huge good market which can meet the following conditions:  High temperature, High Corrossion, High Abrasion, etc. 

Products nominal diameter:1/4"-44"
Pressure class:150LB-20000PSI
Operating temperature:-196-680
Main material:WCB, WC6, WC9, C5, C12, C12A, LCB, LCC, CF8, CF8M, CF3, CF3M, CF8C... etc.

At STONE, we stand for three values-quality,innovation and service. We know the world oil, chemical, petrochemical and process industries require precision flow control products. That is why we exist, we have dedicated ourselves to supplying that need with an extensive range of industrial valves, manufactured in our own factories and designed for environmental sensitivity.

STONE is renowned for producing high quality product and we take great pride in all of our consistent quality products. We always persist in the idea of "All for customer satisfaction". Sincerely hope and warmly welcome to be our long term co-operation partners and to be our Distributor(Agent) in your country or in your market area.