Pneumatic solenoid valves and hydraulic solenoid valves are needed for their ability to control the direction of fluid in pneumatic and hydraulic systems, and can be intergrated with mechanical, electronic, and/or digital systems. Watson Machinery is the largest stockholder of solenoid valves in the Hong Kong region. We distribute API, Univer, Mindman, Parker Taiyo, AIRTAC, CKD, SMC, and FESTO solenoid valves.