This series of manual rotary valves are manual control valves with hard end seals and are widely used in manual control pneumatic systems. It is divided into two series: two-position four-way, three-position four-way and three-position four-way. The three-position four-way valve is further divided into center sealing type, medium pressure type (P) and center relief type (Y). According to the different forms of the nozzle, it can be divided into two types: side nozzle (C) and bottom nozzle (D), both of which can be fixed on the panel. This series of valves are small in size, light in weight and have small operating force. Due to the use of precision ceramic valve core, the leakage is greatly reduced and its performance is more reliable.

| Bottom connection (D) type | Side take-over (C) type |
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