Technical Information on the Kates Flow Rate Controller

Accurate Flow Control Without a Flow Control Loop

To many engineers, accurate flow rate control infers a flow control loop or system. This system must include three or more distinct pieces of equipment, each piece containing one or more mechanical devices or linkages. Two or more transducings of any flow error signal are required, and the fluid characteristics of one or more Whaling and/or power media are involved. The entire system arrangement is fundamentally characterized by its use an orifice of fixed area as a sensor

In contrast, accurate flow rate control can be effected by a single control unit requiring no external cooperated equipment of any kind.  No transducing of the original flow error signal is necessary. Since no external signaling and/or power media are involved, no characteristics of these affect operating characteristics of the control. The entire scheme is characterized- by its use of a flow setting orifice which is adjustable in area.  A picture contrasting the two methods of control can be obtained most rapidly and clearly by starting with the basic fundamentals of the two schemes.

With Kates Adjustable Orifice the orifice area is adjustable. Pressure drop across the orifice is automatically maintained constant. Set point is changed by changing the orifice area.