Check Valve - Ingersoll Rand VTR20 Manuel De Maintenance

CHECK VALVE: The check valve closes when the compressor stops operating, preventing air
from flowing out of the tank through the solenoid release. If, after the compressor stops
operating, air continues to escape through the solenoid valve, it is an indication that the
check valve is leaking. This can be corrected by removing check valve and cleaning disc
and seat. If check valve is badly worn, replace check valve.
Before removing check valve be sure all air is drained out of tank and power is disconnected.
Failure to do so may result in injury or equipment damage.
THE INTERSTAGE PRESSURE RELIEF VALVE on two stage compressors is provided to
protect against interstage over pressure and is factory set to maximum pressure of 75 PSIG.
If the pressure relief valve pops, it indicates trouble. Shut down unit immediately and
determine and correct the malfunction. Inspect the head valves. Serious damage can
result if not corrected and can lead to complete destruction of the unit. Tampering with the
interstage pressure relief valve, or plugging the opening, destroys the protection provided
and voids the warranty.
PISTON RINGS: The piston rings are designed for 10,000 hours operating life, however,
installations may vary. Figure 1-5, shows maximum ring wear before rings must be replaced.
Guide rings and piston rings must be replaced by new sets if the radial ring thickness is out of the
range shown in Figure 1-5. See page 18 for replacement instructions.
Piston Guide Rings
Original
Diameter Thickness
4.7 Inches .118 inches
(120mm) (3.0mm)
3.5 Inches .118 inches
(90mm) (3.0mm)
2.6 Inches .118 inches
(65mm) (3.0mm)
DO NOT RESET!
RING SPECIFICATIONS
Compression Rings
Minimum Original
Thickness Thickness
.102 inches .28 inches
(2.6mm) (7.0mm)
.102 inches .24 inches
(2.6mm) (6.0mm)
.110 inches .20 inches
(2.8mm) (5.0mm)
Figure 1-5
IF3163 Rev A Page 17
Top Compression Rings
Minimum Original
Thickness Thickness
.185 inches .26 inches
(4.7mm) (6.6mm)
.157 inches .23 inches
(4.0mm) (5.84mm)
.130 inches
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(3.3mm)
Minimum
Thickness
.232 inches
(5.89mm)
.212 inches
(5.37mm)
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