Emerson OCX 8800 Instruction Manual page 34

OCX 8800
Figure 2-7. Piping Arrangement,
Blowback with Autocalibration
Cal Gas Flow Meter
( 7 scfh, 20-30 psig
Recommended
Eductor Air In
Electronics
Housing
2-Stage
Regulators
2-14
Tee - (3 x 1/4 in.
(
Tube Unions)
Check
Valve
Check Valve
Sensor
Housing
Reference
Air In
Dilution Air In
Instrument Air
*Normally
Open
Solenoid
Valve
Pressure regulator with 1/8" inlet port is factory
set for 35 or 45 psig. Regulator with 1/4" inlet port
is factory set for 55 psig. If regulators are not
installed in correct locations, the OCX 8800 will
not work.
Vacuum
Gage
*Normally
Closed
Solenoid
Valve
Blowback Valve,
Air Operated
*NOTE: During blowback operation, states of
both solenoid valves change.
NOTE: Wall mount the air-operated blowback
valve on a suitable mounting plate.
Instruction Manual
IM-106-880, Rev 1.0
CAUTION
Dilution
Air Flow Meter
0.1 scfh
Pressure Regulator/Filter
35 psig - General Purpose
45 psig - Hazardous Area
Pressure
Regulator/Filter
55 psig
January 2007
Instrument
Air Supply