This series of manual rotary valves are manual reversing valves with hard end seals and are widely used in petrochemical, electronics, machinery and other industries. They are especially suitable for manual control with special requirements for the middle position of the valve. It is divided into two series: two-position four-way and three-position four-way. The three-position valve is further divided into center-sealing type, medium-pressure type and center-relief type.

