Van
Air HI Series internally heated regenerative compressed
air dryers protect pneumatic equipment and processes from
the harmful effects of moisture within the air lines. Our
HI Series air dryers utilize a multiple-element heater located
within the desiccant tower to heat the purge air for the
regeneration of the adsorbent desiccant.
Van
Air HI Series air dryers supply super dry, -40 F/C pressure
dew point for critical requirements for pneumatic instruments,
controls and sensitive process air.
Wet inlet air flows through the drying tower where moisture
is attracted to and adsorbed on the desiccant. A small portion
of the dry outlet air (expanded to atmospheric pressure)
is diverted to the regenerating tower where it is heated
as it flows downward through the heater isolation tube.
This air is then directed upward through the bed where it
collects moisture and is discharged through the purge valve(s).
The eight-hour MENA cycle includes four hours of drying,
three hours or heating and one hour of cooling per tower.
Individual
heater thermostats and adjustable purge flow rates allow
you to adjust the HI Series heated regenerative air dryer
to meet your operating requirements. Low watt density heaters
contained within the desiccant towers prevent hot spots
which could cause fusing and other damage to the adsorbent
desiccant beads. The -40° F / C dew point achieved with
a Van Air HI Series compressed air dryer virtually eliminates
internal pipe corrosion, adding years to your air system
piping.
Constructed
and tested to the most demanding standards, our HI Series
internally heated regenerative compressed air dryers are
built in-house and made to last. All HI Series desiccant
vessels are ASME certified. Separate valves for hot purge
air prevent thermal shock and extend valve life. Standard
on all HI Series compressed air dryers, our patented Interlock
valve ensures the most reliable tower cycling on the market.
•
Energy-Saving Flexibility
Individual heater thermostats and purge flow rates are adjustable
for your operating requirements.
•
Interlock Logic Valve Control
Patented valve control for the most reliable tower cycling.
Each phase of the drying cycle must be completed before
the next can begin. Protects against loss of flow or pressure
because the offstream tower is fully repressurized before
air flow is redirected to it and a tower can only depressurize
after the inlet transfer valve is fully seated.
•
Long Valve Life
Separate valves for hot purge air prevent thermal shock
and extend valve life.
• Energy-Efficient Regeneration
Achieved by thorough heat distribution. A multiple-element
heater is protected by an isolation tube. Convection heat
is produced by the purge air which is pre-heated as it flows
down through the isolation tube. As purge air enters the
lower part of the desiccant bed, it immediately begins to
collect moisture.
Dimensions and Specifications -
Inches and Pounds |
| Model |
Rated
Flow
(SCFM) |
Avg.
Purge
Flow |
Height |
Width |
Depth |
Heater
(KW) |
In.
/ Out.
(FLG) |
Desiccant1
Weight
per Tower |
Total
Weight |
|
HI-150 |
150 |
9 |
86 |
54 |
36 |
3.5 |
1 1/2 |
116 |
982 |
|
HI-300 |
300 |
18 |
77 |
60 |
42 |
6.5 |
1 1/2 |
232 |
1544 |
|
HI-400 |
400 |
24 |
92 |
60 |
42 |
8.8 |
1 1/2 |
309 |
1868 |
|
HI-500 |
500 |
30 |
91 |
63 |
45 |
10.5 |
1 1/2 |
387 |
2022 |
|
HI-750 |
750 |
45 |
106 |
70 |
50 |
15.5 |
2 1/2 |
588 |
2975 |
|
HI-1000 |
1000 |
60 |
114 |
74 |
53 |
22 |
2 1/2 |
775 |
3850 |
|
HI-1500 |
1500 |
90 |
113 |
74 |
64 |
31 |
3 |
1150 |
5125 |
|
HI-2000 |
2000 |
120 |
106 |
87 |
70 |
41 |
3 |
1550 |
6300 |
|
HI-2500 |
2500 |
150 |
121 |
87 |
71 |
52 |
4 |
1925 |
7775 |
|
HI-3000 |
3000 |
180 |
136 |
87 |
71 |
62 |
4 |
2325 |
9150 |
|
•
Due to continuous improvement, dimensions and specifications
may change without notice.
• Request certified drawing for pre-piping.
• Contact us for larger or special models.
Filtration Recommendations
Lubricated Compressors - Dryer must
be equipped with proper Van Air pre-filters. These filters
must be drained and maintained as specified. Desiccant
beds should be checked periodically and replaced if
contamination has occurred. Failure to do so may result
in hazardous operating conditions and will void the
warranty. An after-filter should be installed downstream
of the dryer to prevent desiccant particle migration.
Non-lubricated
Compressors - A particulate or coalescing
pre-filter is recommended to prevent pipe scale and
dust from fouling the dryer. An after-filter should
be installed downstream of the dryer to prevent desiccant
particle migration.
|
