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GFH20-IOM 05/16
WARNING - TECHNICAL DATA SUBJECT TO EAR CONTROLS
THIS DOCUMENT CONTAINS TECHNICAL DATA WHOSE EXPORT IS RESTRICTED BY THE EXPORT ADMINISTRATION ACT OF 1979, AS AMENDED
(TITLE 50, U.S.C., APP. 2401, ET SEQ.) VIOLATION OF THIS EXPORT CONTROL LAW IS SUBJECT TO SEVERE CRIMINAL PENALTIES.
NOTE:
The downstream pressure will change as the flow
changes. As the flow increases, the delivery pressure will
decrease. See the GFH20 series representative flow
performance graphs for this product.
NOTE:
The outlet set pressure will change as the inlet
pressure changes.
CAUTION:
The internal filter can retain moisture from wet
air. If this product is used in a sufficiently cold (potentially
freezing) environment, a wet filter can result in restricted or
blocked flow.
TYPICAL AIR FLOW PERFORMANCE
TROUBLESHOOTING GUIDE
Symptom
: External leakage
Potential Cause
: Diaphragm to body joint seal
leakage.
Repair:
Disassemble. Inspect regulator body where
diaphragm seals. Replace diaphragm.
Potential Cause
: Bowl to body joint leakage.
Repair:
Disassemble. Inspect regulator body where
bowl o-ring contacts. Inspect bowl where o-ring
contacts. Replace o-ring.
Potential Cause
: Draincock leakage.
Repair:
Tighten draincock by turning handle
clockwise.
Symptom
: Outlet pressure cannot be adjusted to
maximum control range.
Potential Causes:
1. Control knob positive stop adjustment.
2. Flow induced droop.
Repair:
1. Adjust positive stop of control knob.
2. See NOTE in above OPERATION IN SERVICE
instructions and flow curves for explanation – a
higher range regulator may be required.
FLOW CHARACTERISTICS
0
10
20
30
40
50
60
70
0
5
10
15
20
25
FLOW (SCFM)
OU
TLE
T (
P
S
I)
