Rotork Controls [India] PVT Ltd supplies Quarter-Turn Hydraulic Vane Damper. Rotork Controls [India] PVT Ltd offers a wide range of power automation products like electric actuator, fluid actuator, process control actuators, gear boxes and accessories. The Quarter-Turn Hydraulic Vane Damper is used to provide a simple solution to inherent problems seen in swing check valve applications like down line surges from rapid disc reseating and excessive valve wear due to the disc flutter produced at some flow rates.