StoneL Quartz QN Series User Manual

7 QZ 70 en40 | Quartz
StoneL publication 105406revA
4.7 Expeditors
4.7.1 Operation sequences
Fill control operation sequence (Fig. 1)
1. Fill
• Low level indicated
• Controller energizes primary solenoid
• Actuator/valve opens
• Open switch activates
2. Top o
• Intermediate high level indicated
• Controller de-energizes primary solenoid and controller
energizes secondary solenoid
• Actuator/valve closes
• Intermediate switch activates
• Secondary solenoid energizes
• Actuator/valve stops at pre-set intermediate position
3. Full
• Full level indicated
• Controller de-energizes secondary solenoid
• Actuator/valve closes
• Closed switch activates
Emergency shut down (ESD) operation sequence (Fig. 2)
1. Partial close
• Controller de-energizes primary solenoid (test mode set in
controller) and controller energizes secondary solenoid
• Actuator/valve closes
• Intermediate switch activates
• Secondary solenoid energizes
• Actuator/valve stops in partially closed position.
2. Return to full open
• Controller energizes primary solenoid
• Actuator/valve opens
• Open switch activates
• Controller de-energizes secondary solenoid (test mode is de-
activated)
Fill control operation sequence (Fig. 3)
1. Open
• Controller energizes primary solenoid
• Actuator/valve opens
• Open switch activates
2. Rapid to gradual close
• Controller de-energizes primary solenoid and controller
energizes secondary solenoid
• Actuator/valve closes
• ”Intermediate” switch activates
• Secondary solenoid energizes
• Actuator/valve decelerates at preset intermediate position
3. Full close
• Controller de-energizes primary solenoid and controller
energizes secondary solenoid
• Actuator/valve closes
• Intermediate switch activates
• Secondary solenoid energizes
• Actuator/valve decelerates at preset intermediate position
primary
solenoid (NC)
secondary
solenoid (NO)
primary solenoid (NC)
secondary solenoid (NO)
primary
solenoid (NC)
secondary
solenoid (NO)
Fig. 1 ll control
Fig. 2 emergency shutdown (ESD)
Fig. 3 ow dampening

StoneL Quartz QN Series Specifications

General

Brand	StoneL
Model	Quartz QN Series
Category	Measuring Instruments
Language	English