RCV^TM Gas Mixing System

The RCV^TM is a combination of flow meters specifically designed to monitor and control the ratio of two gases. The RCV^TM requires a Waukee Ratio Control Valve and two FLO-TRONIC Flo-meters. The Ratio Control Valve utilizes a micro-processor that continuously compares a preset ratio to the real time ratio of the two gas flows as measured by the FLO-TRONIC Flo-Meters. Using a stepper motor, the Ratio Control Valve continuously adjusts the flow metering needle-valve to precisely maintain the preset gas ratio. The real-time ratio is continuously displayed on the front window of the Ratio Control Valve. Included in Waukee’s Ratio Control Valve is an optional input for the addition of a trim gas, which is frequently used for process control. Trim gas addition is additive to the ratio. When trim gas is used, the continuously displayed real-time ratio then includes the trim gas addition

GENERAL SPECIFICATIONS:

• Preset Ratio is set remotely or locally at the keypad

• For precision ratio, valve is controlled with PID parameters

• The Ratio Control Valve is available on all 28 Waukee meter sizes

• Process Parameters are entered utilizing a sealed membrane keypad

• Valve utilizes precision needle and orifice designed to SAE standards

• Optional Trim Gas (4-20mA) input to improve process control

• RCV^TM requires two meters:
  Gas I: Flo-Meter with a Ratio Control Valve and Flo-Tronic
  Gas II: Flo-Meter with a Flo-Tronic

• Electronic instrumentation operating Temperature -32°F to 150°F, gas temperature can be higher

• Ratio Control Valve is short-circuit protected and requires an external 24 VDC, 2 Amp supply

• Contacts provided for positive shut-off solenoid