Parker Valves for Pipe Mounting
Manatrol stop and throttle 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 provieded to reduce the viscosity effect for sizes 200 up to 600.
The flow is dependent on pressure and viscosity.
OGL Software