ML488 | v19
Page
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Expo Technologies UK
T: +44 (0) 20 8398 8011
E: sales@expoworldwide.com
Expo Technologies US
T: +1 (440) 247 5314
E:sales.na@expoworldwide.com
Expo Technologies China
T: +86 532 8906 9858
E: qingdao@expoworldwide.com
MiniPurge
®
Control Unit Data
Action on Pressure Failure:
Alarm and Trip (isolate power to pressurized enclosure), user
adjustable Alarm Only.
Type of Operation:
Automatic leakage compensation using the Closed Loop Automatic
Pressurization System (CLAPS System).
Purge Flow Capacity
14000 NI/min max.
Enclosure Material:
Stainless Steel 316L.
Mounting Method:
Wall mounting lugs & spacers. Fixing holes as per drawing:
Temperature Limits:
-20
o
C to +55
o
C.
Compressed Air Supply:
Clean, dry, oil free air or inert gas. Refer to Air Supply Quality section
in Installation of the System.
Supply Pressure:
4.2 to 8 barg (61 to 116 psi).
Logic Regulator and Gauge:
Fitted and set to 2.5 barg (36 psi).
CLAPS Regulator & Guage:
Set to system requirements.
Process Connections:
Purge supply and outlet to motor - 2” NPT female.
Minimum supply line 50 mm (2”) I.D Pipe.
Reference points & signals
1
/
8
”
NPT female.
Visual Indicators:
Alarm (Red
) / Pressurized (Green
).
System Purging: 4 LEDs that flash sequentially to indicate elapsed
time (Black
when not purging).
Power Interlock Switch:
DPNO switch, contact ratings 250 Vac 4 Amps (AC-15) / 24V DC 4A,
Ex d IIC T6 Gb / Ex tb IIIC T80ºC Db.
Alarm Switch:
SPCO switch, contact ratings 250 Vac 4 Amps (AC-15) / 24V DC 4A,
Ex d IIC T6 Gb / Ex tb IIIC T80ºC Db.
Intermediate Switch:
SPCO switch, contact ratings 250 Vac 4 Amps (AC-15) / 24V DC 4A,
Ex d IIC T6 Gb / Ex tb IIIC T80ºC Db.
System Purging Switch (Optional):
SPCO switch, contact ratings 250 Vac 4 Amps (AC-15) / 24V DC 4A,
Ex d IIC T6 Gb / Ex tb IIIC T80ºC Db.
High Pressure Switch (Optional):
SPCO switch, contact ratings 250 Vac 4 Amps (AC-15) / 24V DC 4A,
Ex d IIC T6 Gb / Ex tb IIIC T80ºC Db.
Minimum Pressure Sensor:
Minimum: 0.5 mbarg.
Maximum: 5.0 mbarg.
Default Setting: 1.5 mbarg.
Tolerance -0, +0.7 mbarg.
Intermediate Sensor:
Minimum: 2.0 mbarg.
Maximum: 6.0 mbarg.
Default Setting: 4.0 mbarg.
Tolerance: -0, +10%.
High Pressure Sensor:
Minimum: 20.0 mbarg.
Maximum: 35.0 mbarg.
Default Settings: 25.0 mbarg.
Tolerance -0, +10%.
Note: There must be a 1.5 mbarg difference between the minimum pressure and intermediate sensors.
