Bindicator F78MP Series, Руководство по установке и эксплуатации

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MPR180416 Rev. B
AIR PURGE
All MP Series air radar models come standard with an air purge inlet. For convenient cleaning, a purging inlet is provided
above the antenna. The system provides an 1/8” inlet (female thread) above the antenna where clean, dry air passes to
the face of the antenna lens to clean it. The customer will supply the purging air by a manual or automatic valve system.
• Purge duration, pressure, and interval, will vary with each application. It is the user’s responsibility to determine the
requirements depending on the application and cleaning required.
• Short duration bursts of high pressure provide more effective cleaning than continuous low pressure air.
• Some dust particles are highly abrasive and can cause wear on the lens face over time if continuous air purge is used,
therefore short bursts are recommended.
• It is the customer’s responsibility to ensure that any vacuum or pressure in the measured vessel is maintained,
considering the hole that passes through the process connection and MP Series antenna system.
Acceptable Air Consumption
(Flow rate vs applied pressure)
Air Pressure (psi) Approx. inlet volume
flow rate (SCFM)
20 5
40 10
50 15
80 20
100 25
110 30
Recommended 90 to 110 psi for effective cleaning
PURGE CONNECTION
• The purge connection is closed by the manufacturer, using a 1/8” plug (standard on all units).
• When the plug is removed to connect a purging system, the operator is responsible for ensuring that the purging
circuit conforms to explosion protection requirements: for example, by fitting an NRV valve. Air pressure in vessel can
affect purge operation.
PURGE AIRFLOW
• The purge airflow is designed to create a strong vortex of air that rapidly cleans the face of the lens.
• The air purge system can clean both dust and moisture off the lens.
Angled holes direct air flow
Purge process connection with
factory installed 1/8” NPT plug