| Items |
DPB0500
DPB Series - Global Air Treatment Dryers (500 – 4300 scfm)
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DPB0600
DPB Series - Global Air Treatment Dryers (500 – 4300 scfm)
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DPB0750
DPB Series - Global Air Treatment Dryers (500 – 4300 scfm)
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DPB0900
DPB Series - Global Air Treatment Dryers (500 – 4300 scfm)
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DPB1050
DPB Series - Global Air Treatment Dryers (500 – 4300 scfm)
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Flow
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N/A
500 scfm
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N/A
600 scfm
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N/A
750 scfm
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N/A
900 scfm
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N/A
1050 scfm
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Heater Rated Output
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N/A
10 kW
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N/A
12 kW
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N/A
14 kW
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N/A
16 kW
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N/A
19 kW
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Blower Power
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N/A
2.2 hp
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N/A
3.4 hp
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N/A
2.9 hp
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N/A
2.7 hp
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N/A
3.7 hp
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Height
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N/A
105 in
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N/A
108 in
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N/A
114 in
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N/A
114 in
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N/A
113 in
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Width
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N/A
53 in
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N/A
55 in
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N/A
60 in
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N/A
60 in
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N/A
64 in
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Length
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N/A
70 in
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N/A
71 in
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N/A
83 in
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N/A
83 in
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N/A
84 in
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Inlet/Outlet Connection
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N/A
2" NPT
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N/A
2" NPT
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N/A
3" ANSI Flg
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N/A
3" ANSI Flg
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N/A
3" ANSI Flg
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Repl. Desiccant
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N/A
354 lb
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N/A
453 lb
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N/A
590 lb
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N/A
590 lb
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N/A
710 lb
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Weight
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N/A
1866 lb
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N/A
2111 lb
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N/A
2456 lb
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N/A
2472 lb
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N/A
2981 lb
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Maximum Working Pressure
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N/A
150 psig
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Minimum Working Pressure
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N/A
60 psig
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Inlet Air at 100°F ±2°F
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N/A
100 ±2 psig
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Ambient Temperature
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N/A
80°F ±5°F
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Ambient Dew Point Temperature
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N/A
70 °F
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Inlet Pressure Dew Point
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N/A
100 °F
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Outlet Pressure Dew Point
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N/A
-40 °F
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Maximum delta P
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N/A
5 psid
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Drying Time
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N/A
4 hours
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Inlet Air Pressure
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N/A
60–150 psig
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Inlet Air Temperature
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N/A
40–120 °F
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Features
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N/A
1. Reliable and Durable Air Flow Control Components
High quality inlet and purge valves feature air operated butterfly valves which offer high cycle life, resilient elastomeric seats for leak free service, low profile nickel plated disks offer low pressure drop, stem bushings ensure smooth operation, and no field lubrication required.
Durable pneumatic actuators are isolated from the air stream and can’t be contaminated by incoming moisture. The inlet valves are double
acting rack and pinion and use air power to both open and close. A spring return holds the purge valves closed prior to start-up and upon
loss of pressure protects the desiccant bed from outside contamination. Dual pistons offer
a large control area, high torque, and a rapid response. Position indicator shows if valve is open or closed. Valves may also be operated manually.
Pilot air is filtered by a 1 micron particulate filter to ensure dependable actuation. An isolation valve allows for easy filter element
service. Non-lubricated pilot valves with hermetically sealed coils and ISO 5211/Namur interface are standard.
Check valves are soft seated for sure closures and minimal wear. Check valves are spring loaded to prevent back flow leakage when the downstream (closing) pressure is low.
Separate depressurization valves allow slow depressurization of the off-stream tower.
Mufflers keep noise below OSHA requirements.
Repressurization valve allows tower to be fully repressurized before switchover which eliminates bed movement and loss of pressure downstream.
2. Durable and Eficient Blower
High quality blowers
Intake filter protects blower and desiccant beds from contamination
Mounting pads and flexible air connections are used to eliminate vibration
3. Heater Design for Long Life
Low watt density (23 W/in2) elements with Incoloy sheaths
Temperature is controlled by an adjustable, digital indicating controller with thermocouple input which minimizes temperature swings
Protection against overheating and element burnout provided by hi-limit provisions on controller plus an overtemperature thermocouple
Over current protector with manual reset is provided
4. Insulation Reduces Heater Size
Fully insulated heater vessel and upper purge piping standard
Minimizes heat losses which reduces heater size
Protects plant personnel from hot surfaces
Durable melamine foam and fiberglass protected by jacket of polyester fabric impregnated with PVC
5. Large Desiccant Beds Ensure Consistent Dew Points
30% extra desiccant provided to compensate for natural bed aging over the expected 3 to 5 years bed life
7.2 seconds of contact time for saturated air with the desiccant.
High grade of activated alumina has high crush strength and is resistant to abrasion
6. Quality Tower Design
Cleanable, stainless steel air flow diffusers on inlet and outlet ensure even flow distribution and eliminate channeling through the bed
Separate fill and drain ports
ASME code constructed and stamped pressure vessels standard.
Pressure relief valves on all models
Finished with heat resistant enamel
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Process Designs
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N/A
Standard Air Drying and Filtering Process
Compressed air is prefiltered prior to the desiccant dryer by a 1 micron solid particle particulate filter
and then by a oil removal filter [to 0.008 ppm (0.01 mg/m3)].
The wet, compressed air now enters the bottom of Tower 2 of the two dual towers filled with a bed of
activated alumina desiccant through the inlet switching
valve A. Inlet switching valve B is closed. Inlet valves A
and B are butterfly valves with double acting actuators.
The activated alumina adsorbs the moisture in the
compressed air as the air flows upward through Tower
2. Upflow drying protects the bed from water and heavy
contaminants by separating them from the air stream as they enter the tower. Cleanable, stainless steel, flow
diffusers on the inlet and outlet of the tower ensure even flow distribution through the bed-which avoids channeling.
The dry air exits the dryer through outlet check valve F. A FHT Series High Temperature afterfilter filters desiccant dust
particles to 1 micron in size at the dryer outlet.
FEATURES, BENFITS, OPTIONS
Standard Controller
Tower Status
Service Reminder
Heater on
Heater temperature
Desiccant bed temperature
Failure to switch
RS 232 port
NEMA 4 enclosure
Option E = Energy saving demand controller
Energy saving demand controller provides an integrated humidity/temperature sensor from the
on-line drying tower. Sensor “over-range” and “under-range” alarms. High humidity alarm.
Vacuum fluorescent text, 2 line 16 characters.
Highly visible in darkness or sunlight
English, Spanish, French languages
Automatic restart after power loss
Remote indication of alarm
Power on light
Heater on light
Tower status (drying, switchover, heat, cool, etc.)
Tower switch switchover, failure (low heater temp/high heater temp)
Dry Contacts (power, heater-on)
LED sensor over-range or under-range temp/humidity dew point
Service reminder
RS 232 port
NEMA4 enclosure
Option D = dewpoint monitor with energy saving demand controller
Digital dew point monitoring (text display)
All of the features of the Energy Saving Demand Controller
High dew point alarm
Option V
Insulate vessel shell and hot piping from heater to vessels
Option F1
Mounted Grade E prefilter and FHT afterfilter with drain valve on separate skid package.
Option F2
Mounted Grade E prefilter and FHT afterfilter with drain valve with block and by-pass valves on
separate skid package.
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