Rev 02, 09/21
Perma Pure LLC
• A Halma Company • [email protected] • www.permapure.com
Telephone: 7
32-244-
0010 • Toll Free: 800
-337-
3762 • Fax:
7
32-244-8140
1
001 New Hampshire Ave.,
L
akewood, NJ 08701 USA
7.3
FUNCTION
OF
PURGE
AIR
FLOW
COMPONENTS
7.3.1
Flowmeter and Needle Valve
For maximum drying performance, monitor the flow of purge gas through the PD sample gas dryer. Refer to the
system check procedure for purge for adjustment and verification.
7.3.2
Vacuum Gauge
Allows for monitoring of the vacuum level generated by the PD sample gas dryer purge eductor. The vacuum is
dependent on the instrument air supply pressure, and the purge air flow rate. Refer to the system check
procedure for purge for adjustment and verification.
7.3.3
Purge Air Eductor
Nafion
™
membrane PD sample gas dryers operate on the differential of the partial pressure between the
sample and the purge. The purge eductor generates vacuum, which assists in generating this differential. It
operates on instrument air pressure. The generated vacuum level and the resulting drying performance will be
affected by fluctuations in supply pressure.
START-UP
PROCEDURE
Read through this section completely before sample gas is allowed to flow through the system.
8.1
Primary Sample Handling System Check Procedure
If a probe filter is present upstream of the Hybrid Sample Gas Cooler system, check:
•
If heated type, that heated probe and heated line are working properly and maintaining desired
temperature.
•
Check that the probe filter element is present and clean. It should be cleaned frequently and replaced if
required.
•
Check for cold spots (unheated tubing) in the heat traced sample line is always recommended
upstream of the conditioning system. Sample should enter conditioning system above 100
C.
•
If present, check that the blowback air operated valve or solenoid valve is operating properly.
8.2
Hybrid Sample Gas Cooler System Check Procedure
