MAXIMATOR DLE - Leak Detection

Maintenance
35 0000000141 - 002 - EN
7.2.6 Leak detection
The following section explains how to inspect for leaks:
Description
Qualifications Repair and service gas booster
Type of mainte-
nance
Check
Interval semi-annually
Prerequisites The gas booster is easy to access.
Tools – Torch
– Leak detection system
a
– Jaw spanner
1. On a running gas booster (about 40 strokes/min, clear outlet):
Test for leaks on the drive side (Z2, Z4, Z6).
2. Shut off the gas outlet.
Adjust p
B
to a value that is standard for the system.
Relieve p
L
.
Test for leaks on the high pressure side (Z1, Z3).
b
3. Carefully relieve the gas outlet until the gas booster piston has reaches its
end position and the other cylinder is pressurized .
Shut off the gas outlet.
Test for leaks on the high pressure side (Z1, Z3).
c
4. Shut off the gas outlet.
p
B
to a value that is standard for the system.
Relieve p
A
.
Relieve p
L
.
Measure leakage via the check valves.
5. Relieve p
L
.
Relieve p
A
.
Relieve p
B
.
Disassemble the spool valve.
Examine the spool valve.
Are the seals worn?
Is it still adequately lubricated?
6. The inspection has been successful if:
– all leak tests have been carried out successfully.
– the spool valve is OK.
If the gas booster does not pass the inspection, it must be repaired or re-
placed.