The company covers the total area of 16000 square meters. Established in 1995, the company has many years of experience in valve manufacturing and now it developing fast and stably. Through years of consistent innovation and develop.Risson now prides itself on technical strength, the company now has 232 staff members and 20 senior engineers and technicians. The use of specialized software like Pro/E.CAD etc shorted the P&D and trial manufacture cycle, and greatly improved the service life and dependability of the products. Besides, Risson now owned more than 200 sets of digital-controlled lathe and processing center, it has been certified to ISO9000-2000 and pressure vessel AZ, now it undertaking API and CE certification, and now we manufactured to the advanced international standards, such as API.ANSI.BS.DIN.JIS.JPI and GB.or no standard products to meet customers