Founded in 1993 and located in Wenzhou, Zhejiang, with a registered capital of RMB 30 million, JSHUN specializes in the manufacturing of valve gearboxes. The company holds ISO9001 and CE certifications, and its products are strictly manufactured in accordance with GB/T 12222 and GB/T 12223 (equivalent to ISO 5210/5211) standards, ensuring interchangeability and reliability. Its products are compatible with gate valves, globe valves, butterfly valves, ball valves, plug valves, and are often paired with electric or pneumatic actuators. Materials include CF8M, CF8, WCB, and other options, while stem nuts are made of wear-resistant alloys such as D2 and H94. Its main product lines include valve gearboxes, screws, stem nuts, and turbine gears.