Series 9N Steel Needle Valve

Manatrol stop and throttle hydraulic valves with 2-stage needle cone. Fine adjustment for the first stage can be achieved with 3 rotations of the adjustment knob.

The second stage with normal throttle characteristics is achieved with 3 further rotations.

A cylindrical needle with a rectangular slot is provided to reduce the viscosity effect for sizes 200 up to 600.

The flow is dependent on pressure and viscosity.