Gas Valves - GE Sievers InnovOx Operation And Maintenance Manual

Chapter 9: Troubleshooting

Gas Valves

When you press the Gas Valves button, the following screen appears.
When you press one of the three valve buttons, the Gas Valve Test area becomes active. The Analyzer displays
the designation of the specified valve, its state (Open or Closed). and the flow rate of the gas. To stop the Gas
Valve Test, press the Back button.
When the Sparge Gas Valve, V7-SH, is tested, the gas flow rate should be approximately 200 cc/min. The flow
rate will initially vary from this value as the gas flow control system adjusts to having the valve opened. The flow
rate will settle down after a few seconds. If the flow rate stabilizes to less than 150 cc/min., then investigate
plugging in the sparge gas lines. If the flow rate does not stabilize to within 200 + cc/min after 15 seconds, then
V2-GS may need to be replaced.
During this test, valves are set as shown below:
• Proportional valve, V2-GS, is set to its normal set point for the sparge gas flow
• Sparge Gas Valve, V7-SH, is opened.
When the Carrier Gas Valve, V1-R, is tested, the gas flow rate should be approximately 165 cc/min. The flow rate
will initially vary from this value as the gas flow control system adjusts to having the valve opened. The flow rate
will settle down after a few seconds. If the flow rate stabilizes to less than 125 cc/min., then investigate plugging
in the carrier gas lines. If the flow rate does not stabilize to within 165 + cc/min after 15 seconds, then V2-GS
may need to be replaced.
During this test, valves are set as shown below:
• Valve V2-R is closed
• Proportional valve, V2-GS, is set to its normal set point for the carrier gas flow
• Carrier Gas Valve, V1-R, is opened.
GE Analytical Instruments ©2013
Figure 65: The Gas Valves Screen
191 of 238 DLM 68100-06 EN Rev. A