Heatless Desiccant Air Dryers - PTW Series | Parker NA

Heatless Desiccant Air Dryers - PTW Series

Heatless desiccant dryers remove moisture by passing air over a regenerative adsorbent material which strips moisture from the air. They are ideal for critical high quality oil free air treatment applications where very dry air is required.

Description
    PTW Series Heatless Regenerative Desiccant Dryers are ideal for critical, high quality, oil free air treatment applications where very dry air is required. These dryers typically provide pressure dew points of -40°F (-40°C) down to -100°F (-73°C) pressure dew point (pdp). Beneficially, a pressure dew point of -15°F (-26°C) or better will not only prevent corrosion, but will also inhibit microorganisms within the compressed air system Heatless adsorption or desiccant dryers remove moisture by passing air over a regenerative adsorbent material which strips moisture from the air. This process is known as Pressure Swing Adsorption.

    Dryer of this type are extremely efficient and provide typical pressure dew points of -40°F (-40°C) or -100°F (-73°C) pdp. This means that for water vapor to condensate into a liquid, the air temperature would have to drop below -40°F (-40°C) to -100°F (-73°C) respectively. Note that the actual air temperature after an adsorption dryer is not the same as it's dew point. The desiccant material is contained in two separate but identical pressure vessels commonly referred to as "twin" towers. As the saturated compressed air flows up through the "on line" tower, its moisture content adheres to the surface of the desiccant. The dry compressed air is then discharged from the chamber into the distribution system. An onboard solid state controller automatically cycles the flow of compressed air between the towers. While the "on line" tower is drying, the "off line" tower is regenerating. Regeneration, sometimes referred to as purging, is the process by which moisture accumulated during the "on line" cycle is stripped away during the "off line" cycle. As low pressure dry purge air flows gently through the regenerating bed, it attracts the moisture that had accumulated on the surface of the desiccant during the drying cycle and exhausts that moisture laden air to atmosphere.  

    Functions of Heatless Regenerative Desiccant Dryers
      • Mounting: structural steel base
      • Mounting: 1/2" | 3/4" | 1" | 1-1/2"| 2"
      • Primary Voltage: 120V/1ph/60Hz
      • Flow SCFM: 25 to 800
      • Flow m³/min: .70 to 22.65
      • Approximate Purge: 15%
      • Maximum inlet or ambient air temperature: 120°F or  49°C
      • Maximum Pressure: 150 psig or 10.5 bar
      • Minimum Pressure: 50 psig or 3.5 bar
      • Certifications NEMA 4; All NEMA classifications available as options
      • Dew point Range: -40 to -100°F or -40 to -70°C
      • Features Particulate and Coalescing pre-filters. After-filter included; solid state controller;
         CycleLoc™ demand control; variable cycle control (models PTW75 - PTW800 SCFM); purge flow indicator;
         purge flow regulator (models PTW75 -TW800 SCFM) repressurization circuit (models PTW75 - PTW800 SCFM)
         NEMA 4 controls; 150 psig design standard; moisture indicator (models PTW75 - PTW800 SCFM)
      • Weight: 156 to 2120lbs or 71 to 962kg
      • Options/accessories DDS Light / DDS (dew point dependent switching); 4-20 mA output; all NEMA classifications
         pressure to 1,000 PSIG; high humidity alarm; fail to switch alarm; electronic drain systems; contacts for remote alarms; NEMA 4 controls
Description

Performance Characteristics

Function

Heatless Regenerative Desiccant Dryer

Mounting

Structural Steel Base

Port Size

1/2" | 3/4" | 1" | 1-1/2" | 2"

Input Supply Voltage

120VAC/1ph/60Hz

Flow Rate (SCFM)

25 to 800

Flow Rate (m3/min)

0.70 to 22.65

Purge Rate

0.15

Maximum Inlet Temperature (F)

120

Maximum Inlet Temperature (C)

49

Maximum Operating Pressure (psig)

150

Maximum Operating Pressure (bar)

10.5

Minimum Operating Pressure (psig)

50

Minimum Operating Pressure (bar)

3.5

Certificates

NEMA 4; All NEMA classifications available as options

Dewpoint (F)

-40° to -100°

Dewpoint (C)

-40° to -73°

Weight (lb)

156 to 2120

Weight (kg)

71 to 692

Contact Us

PNEUMATIC DIVISION NORTH AMERICA
8676 EAST M89
RICHLAND MI 49083 USA
Phone 269-629-5000. Customer Support & Applications Eng: 1-877-321-4PDN
Fax  269-629-5385