Patent ID: 8695633
Filing Date: 2014-04-15
Classification: B01D,F16K,Y10T

Abstract:
1. A method of minimizing wear of a rotary valve including a flat ported rotor, a flat ported stator and a seal sheet positioned therebetween, with the seal sheet including a first side adjacent the flat ported rotor, and wherein the seal sheet extends across multiple ports, comprising the method comprising: using a sensor to measure at least one of a breakout torque or a running torque wherein the breakout torque is the initial torque required to set the flat ported rotor in motion with respect to the flat ported stator and the running torque is the ongoing torque required to maintain the flat ported rotor in motion after such motion has been initiated by the breakout torque; and controlling, in real time during indexing of the rotary valve, a seating pressure on the first side of the seal sheet when indexing the rotor generally coaxially relative to the stator in response to the measured breakout torque or the measured running torque.