Desiccant; Mufflers - Ingersoll Rand HRD Serie Manuel De Instrucciones

Back pressure reduces the capacity of the dryer.
Consult your local distributor for piping details if re-
quired.
Dryer bypass piping may be installed to allow uninter-
rupted airflow during servicing. If the downstream ap-
plication cannot tolerate unprocessed air for short
periods, install a second dryer in the bypass line.
CAUTION
Do not hydrostatically test the piping with the
dryer in the system. The desiccant will be
damaged if saturated with water.

Desiccant

Standard dryers, which dry to a –40°F pdp, use acti-
vated alumina as the desiccant in the dryer vessels.
Models HRD56 through HRD600 are shipped with ac-
tivated alumina in the dryer vessels. Activated alumina
is shipped loose with all other standard models.
Dryers that dry to a –100°F pdp (designated by the
suffix J in the model number) use activated alumina
and molecular sieve in the dryer vessels.
Models HRD56-J through HRD600-J are shipped with
activated alumina in the dryer vessels. Molecular sieve
for these models is shipped loose. Activated alumina
and molecular sieve are shipped loose with all other
–100°F pdp models.
All desiccant and molecular sieve shipped loose
must be added to the dryer vessels before the dryer
is put into service.
Refer to Table 2 for desiccant type and quantity per
vessel.
Table 2
DESICCANT REQUIREMENTS
–40°F PDP
Activated
Dryer Model
Alumina
No
(lbs per
vessel)
HRD56 31
HRD100 60
HRD160 95
HRD200 120
HRD275 165
HRD350 210
HRD475 285
HRD600 366
HRD800 475
HRD1000 600
HRD Series (Bulletin 348)
–100°F PDP
Activated Molecular
Alumina Sieve
(lbs per (lbs per
vessel) vessel)
21 9
40 16
65 27
80 33
110 46
140 58
190 79
250 101
325 133
400 165
–40°F PDP
Activated
Dryer Model
Alumina
No
(lbs per
vessel)
HRD1200 725
HRD1450 880
HRD1710 1,025
HRD2010 1,200
HRD2250 1,366
HRD2600 1,567
HRD3250 1,975
To add desiccant:
WARNING
The following procedure provides instructions
for adding the initial desiccant to the vessels. If
replacing desiccant, refer to the instructions
on page 1-11.
1. Verify pressure gauges of both vessels indicate 0
psig. If not, depressurize the vessels according to
the shutdown instructions on page 1-10.
2. Remove the pipe plug from the desiccant fill port
at the top of each vessel. Refer to the dryer label
for the schematic depicting the fill port location.
CAUTION
Pouring desiccant creates a fine dust; safety
goggles, gloves and dust mask should be
worn by personnel installing desiccant. Refer
to the Material Safety Data Sheets (MSDS) on
page 1-21 for more complete information.
Do not tamp the desiccant in vessels. Tamping
damages desiccant and causes dusting.
3. Carefully pour activated alumina into the vessels
through the fill port.
4. If molecular sieve is required, first pour the cor-
rect amount of activated alumina into each vessel;
pour the molecular sieve on top of the activated
alumina.
5. Tap the vessels with a rubber mallet to ensure uni-
form distribution of the desiccant.
6. Replace the plugs in the fill port connections.

Mufflers

Purge exhaust mufflers are supplied with every dryer.
If they are not factory installed, they must be screwed
into the purge exhaust connection on the lower mani-
–100°F PDP
Activated Molecular
Alumina Sieve
(lbs per (lbs per
vessel) vessel)
500 200
580 240
675 282
800 330
911 379
1,045 435
1,320 550
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