Yokogawa Advanced Reflux Sampler - Manual (Page 8)

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All Rights Reserved. Copyright © 2011, Yokogawa Electric Corporation. Subject to change without notice. April 2011 IM 11A00V01-01E-A
Section 2 – General Specification listed above defines the required utilities needed for YARS operation. Also, refer to the
General Installation drawing provided specifically for the YARS by serial number for the hook-up details.
4.1 Instrument Air
The media used by the Vortex air tube(s) is ISA grade Instrument air. Plant Nitrogen may be used in place of the air,
provided it meets the required pressure and flow demands of the YARS. The air shall be clean, dry (-40 o C dew point),
oil free and contain particles <5µ. The instrument air pressure at the YARS shall be 60-100 psig (~ 4-7 Barg). Failure to
use a filter will cause potential freezing and clogging of the compressed air path inside the Vortex Tube. Filter elements
must be changed on a regular basis. Frequency of change is determined by the conditions of the compressed air
supply.
At pressure less than this, the Vortex tube performance declines significantly and may be unable to provide the required
quantity of cooling air. Any instrument air-line run to the YARS in the field should be 1/2” o.d. to ensure adequate flow at
the desired pressure.
Electronically controlled samplers use two vortex tubes, each typically with a 4 SCFM flow capacity (Check Data Sheets
for your installed model) however, the actual air demand during normal operation will vary depending on the changing
process and climatic conditions at each site.
CAUTION
• COMPRESSED AIR COULD CAUSE DEATH, BLINDNESS OR INJURY
• DO NOT OPERATE A VORTEX TUBE AT AIR PRESSURES ABOVE150PSIG (10.3 BARG)
• DO NOT OPERATE A VORTEX TUBE AT LINE TEMPERATURES ABOVE 110OF (43OC)
• AVOID DIRECT CONTACT WITH COMPRESSED AIR
• DO NOT DIRECT COMPRESSED AIR AT ANY PERSON
• WHEN USING COMPRESSED AIR, WEAR SAFETY GLASSES AND SIDE SHIELDS
The performance of the Vortex tubes is also based on the incoming instrument air temperature and therefore, for more
efficient operation, avoid direct sun light (and other heat emitting sources) when running the air-line.
4.2 Low Pressure Steam
The sampler is equipped with low-pressure steam injection valve located in the lower filter section. Steam may be used
either as an addition at the inlet (for assisted reflux action), or for cleansing through either the inlet or outlet.
NOTE
Do not use steam temperatures in excess of 232 o C (450 o F).
Ensure the needle valves are closed prior to connecting the steam supply and ensure the steam supply line is adequately
insulated. Connect the steam supply directly to the needle valve supplied with the sampler.
NOTE
WHEN OPERATING WITH STEAM, NOTE THAT SURFACES MAY BE EXTREMELY HOT AND CAN CAUSE SEVERE BURNS
AND OTHER PERSONAL INJURIES – ADHERE ALL SAFETY PROCEDURES APPLICABLE AT SITE FOR STEAM SERVICES
- FAILURE TO DO SO COULD RESULT IN INJURY OR DEATH.
4. UTILITY REQUIREMENTS