6. Operations and Adjustments
26
PNEG-2174
Sampler - Model GRA
Air Filter/Pressure Regulator
The air filter/regulator assembly provides a clean and regulated air supply to the samplers pneumatic
components. A pressure gauge gives the operator an accurate reading of the downstream air pressure.
The regulator is equipped with an adjustment knob for controlling the outlet pressure and a manual
“pet-cock” type drain for draining the filter bowl.
Prior to introduction of air supply, turn the adjustment knob counterclockwise until all load is removed from
the regulating spring. Turn ON system air pressure. Turn adjustment knob clockwise until desired outlet
pressure is reached.
To avoid minor re-adjustments after making a change in the pressure setting, always approach the desired
setting from a lower pressure. When reducing from a higher setting to a lower setting, first reduce to a
pressure setting lower than desired and then adjust upward.
To “lock-in” the pressure setting on the regulator, push the lockring on the adjustment knob down until it
snaps into place. To release pull the lockring upward. The pressure setting can be made tamper resistant
by installing a seal wire in the groove above the lockring.
Figure 6C Filter/Regulator
Pneumatic Cylinder (Sample Cutter Drive)
This double-acting air cylinder pivots the sample cutter either left or right thru the product flow. The cylinder
rod is direct connected to the sample pelican. Solenoid valve V-1 controls positioning of this cylinder.
Ref #
Description
Ref #
Description
1
Adjustment Knob
5
Air Pressure Gauge
2
Air Regulator
6
Air Filter and Bowl with Sight Glass
3
Shut Off Valve (Optional)
7
Lubricator (Optional)
4
Flow
