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DANIELTM MODEL 788DVC DIGITAL CONTROL VALVES | D E C 2012 |
4.0INSTALLATION AND MAINTENANCE
The most common application of the Daniel Model 788DVC Digital Control Valve is for truck loading of petroleum products. The valve may be used with a variety of flow meter types, including Coriolis and turbine meters, as shown in Figure
Flow must be horizontal or vertical up but never vertical down.
4.1Recommended Installation Instructions
As with all control valves, it is most important that proper installation be accomplished if the valve is to operate as designed. Preliminary
1.Evaluate the metering system in the process line to determine that criteria pertinent to digital valve control is met.
•Minimum meter
•Minimum meter pulse frequency (low flow): 50 Hz
•Minimum opening time
•Minimum closing time (full open to
2.Reference engineering drawings for proper
3.Check valve position. The inlet flange has been marked and is to be in the upstream position.
4.Verify all electrical connections against wiring diagrams and unit specifications. Reference Figure
INSTALLATION AND MAINTENANCE |