Some well-known manufacturers in China include:

Sunglory: A Chinese company specializing in the production of solenoid valves and other fluid control products. They offer a range of solenoid valves including normally closed, normally open, and bi-directional valves. Shenzhen Singsun: Known for their solenoid valves and automation products. They provide various types of solenoid valves, including those for air, water, and industrial applications. Shanghai Eichen: A company that manufactures different types of solenoid valves, including those that are normally closed. They focus on providing valves for industrial automation and fluid control.