New RID Rotor Interference Detection van DMN-Westinghouse
The Rotor Interference Detection (RID) system can be installed to minimise damage to the rotary valve and warn of possible contamination of the conveyed product in the unlikely instance of the rotor fouling the valve body or end covers. Regardless if the RID system is employed on an easy detachable valve with or without supporting rails, our valve remains easy detachable.
By isolating the rotor from the body and end covers, the electrical resistance can be monitored. When a change in resistance takes place due to contact, this will be signalled and the drive should immediately be stopped. The direct drive execution is isolated by the coupling which has a plastic spider. The chain drive is isolated from the motor base plate and the body.
The contact points for electrical connection are at the drive end and on the end cover / body. This monitoring is done with an isolated switch amplifier. This will give an instant output signal in case of any contact between the rotor and the body or end covers and has a fail safe monitoring. The amplifier will be supplied separately.
The RID system is a very simple make or break connection. In effect the rotor is insulated from the rest of the valve and if and when the rotor touches the casing, contact is made which is relayed to the system control. And that is all it is. DMN do this by using high quality electrically insulated hybrid bearings which also have several other advantages.
