Desiccant Dryers

Begin Here: Sizing Walker Filteration Desiccant Dryers

Use this formula to select the appropriate desiccant dryer for your application:
     Max Compressor Inlet Flow Rate / (Min Operating Pressure CF x Max Temperature CF x Pressure Dewpoint CF) = Dryer Flow Rate Needed

Correction Factors

Operating Pressure
(PCF)		 PSIG 58 72 87 100 116 130 145 160 174 189 PROSFD Only
203 218 232
Correction Factor 0.62 0.75 0.87 1 1.12 1.25 1.37 1.5 1.62 1.75 1.87 2 2.12
Temperature
(TCF)		 °F 68 77 86 95 104 113 122
PROSFD Correction Factor
(4 to 35 SCFM)		 1.07 1.06 1.04 1 .88 .78 .55
PRODRY Correction Factor
(46 to 360 SCFM)		 1.3 1.2 1.1 1 .75 .65 .45
Pressure Dewpoint
(DCF)		 °F -4 -22 -40 -94 -100
PROSFD Correction Factor
(4 to 35 SCFM)		 1 0.7
PRODRY Correction Factor
(46 to 360 SCFM)		 1.23 1.2 1 HP Cartridge Required
0.8 .77

Example

Requirements Correction Factor
Max Compressor Inlet Flow Rate 15 SCFM  
Min Operating Pressure (to Dryer) 87 psig PCF = 0.87
Max Temperature (to Dryer) 77°F TCF = 1.06
Pressure Dew Point -94°F DCF = 0.7
Corrected Dryer Flow Rate Inlet Flow Rate
(PCF x TCF x DCF)		 15 / (0.87 x 1.06 x 0.7)
= 23.2 SCFM

The appropriate dryer model would be: PD0025, which has an inlet flow rate of 25 SCFM.

Contact us for assistance in sizing dryers and any other equipment!

PROSFD - Low Flow Desiccant Dryers

With flow rates from 4 – 35 SCFM, our range of lower flow PROSFD models provide a proven solution for compressed air drying and are ideal for smaller, point of use applications.

Designed to deliver optimum performance in line with the highest standards of air purity, as specified in ISO 8573-1: 2010, PROSFD models PD004 to PD035 are supplied as standard with a XA grade 0.01 micron coalescing filter.

With a compact design and multi-ported manifold, the dryer can be installed vertically and horizontally, providing a flexible solution to your compressed air drying needs. This highly reliable, high efficiency range of dryers features built-in energy management, allowing the purge flow to be isolated during periods of low demand for efficient use of compressed air. Whatever your application requirement, PROSFD delivers a compressed air drying solution you can trust.

Specifications

Standard Pressure Depoint: -40°F
Optional Pressure Dewpoint: -4°F
     (-100°F w/ High Performance Cartridge)
Working Pressure Range: 58 ~ 188.5 psig
Power Supply: 12-24VDC or 100-240VAC @ 50-60Hz
Minimum Ambient Temperature: 41°F
Inlet Temperature Range:  35 ~ 122°F

Features

  1. Dewpoint management sensor (hygrometer) increases operating efficiency up to 81% (fitted with DMC controller)
  2. Top loading cartridge design and lifting handle for fast and efficient servicing
  3. Compact modular design with built-in lifting hook
  4. Multi-ported manifold for flexible installation
  5. Advanced desiccant blend delivers optimised dewpoint and improved performance
  6. Intelligent LED controller with built-in energy management (supplied as standard)
  7. Anodised aluminum extrusions provides corrosion protection
  8. Externally fitted silencers for dramatically reduced service time

0.01 Micron Pre-Filter

Supplied as standard

LED Controller

Supplied as standard

1 Micron Dust Filter

Integrated into desiccant cartridge

PD004 to PD035 - Technical Specs

Flow Rates 4 SCFM to 35 SCFM

Pipe Size Inlet Flow Rate
(SCFM)*		 Dimensions (Inches) Weight
(Lbs)		 # of
Cartridges		 Unit Model Included Filter
A B C D E F
3/8" 4 17.52 11.02 3.62 0.87 6.3 16.34 29 2 PD004 A30032XA
3/8" 6 20 11.02 3.62 0.87 6.3 18.7 31 2 PD006 A30032XA
3/8" 8 22.24 11.02 3.62 0.87 6.3 21.06 33 2 PD008 A30032XA
3/8" 10 25 11.02 3.62 0.87 6.3 23.82 36 2 PD010 A30032XA
3/8" 15 32.09 11.02 3.62 0.87 6.3 30.91 43 2 PD015 A30032XA
3/8" 25 47.4 11.02 3.62 0.87 6.3 40.75 53 2 PD025 A30032XA
3/8" 35 61.77 11.02 3.62 0.87 6.3 56.3 68 2 PD035 A30032XA
 

*Stated flow capacities based on an inlet pressure of 100 psig, inlet temp of 95°F and outlet pressure dewpoint of -40°F.
For capacities at other conditions, please refer to the correction factors section.
Flow rates referenced to standard conditions, 68°F at 14.7 psia, and 0% relative water vapor.

Service Kits

Kit A: 6,000 Hours

Silencer Kit
Dryer Model Kit Number
PD004 PD1SK01
PD006-PD035 PD1SK02

Kit B: 12,000 Hours

2 plastic desiccant cartridges, pack of sealing O-rings and sealing washers, instruction manual, controller re-set disc.
Dryer Model Kit Number
PD004 PDC004-12000
PD006 PDC006-12000
PD008 PDC008-12000
PD010 PDC010-12000
PD015 PDC015-12000
PD025 PDC025-12000
PD035 PDC035-12000

Kit C: 24,000 Hours

Solenoid valves, shuttles, shuttle seats, O-rings, diaphragms (including diaphragm springs and brass discs)
Dryer Model Kit Number
PD004-PD035 VSKS 01
Note: To complete a 24,000 hour service, both Kit B and Kit C are required.

PRODRY - Large Flow Desiccant Dryers

The all new Walker Filtration PRODRY models feature major design changes that deliver significant energy savings, dramatically reduced service times and optimum performance across the range.

Tested and validated to international standards, PRODRY’s multi-voltage capabilities allow for worldwide installation.

Now with the option to upgrade to advanced dewpoint management for even greater operating efficiency - whatever your application requirement, PRODRY’s optimum performance delivers a compressed air drying solution you can trust.

Specifications

Standard Pressure Depoint: -40°F
Optional Pressure Dewpoint: -4°F
     (-100°F w/ High Performance Cartridge)
Working Pressure Range: 58 ~ 188.5 psig
Electonic Control (LED): 115 or 230 VAC @ 50-60Hz
Depoint Control (DMC): 24 VDC
Inlet Temperature Range:  35 ~ 122°F

Features

  1. Top loading cartridge design and lifting handle for fast and efficient servicing
  2. Dewpoint management sensor (hygrometer) increases operating efficiency up to 81%
    (fitted with DMC controller)
  3. Compact modular design with built-in lifting hook
  4. Multi-ported manifold for flexible installation
  5. Advanced desiccant blend delivers optimised dewpoint and improved performance
  6. Intelligent LED controller with built-in energy management (supplied as standard)
  7. Anodised aluminum extrusions provides corrosion protection
  8. Externally fitted silencers for dramatically reduced service time

Unique Purge Plug

Select orifice size to suit changing pressure requirements

Tower Pressure Gauges

Clearly visible diagnostics for accurate pressure readings

Optional DMC Controller

Advanced dewpoint management & energy savings

PD0046 to PD0360 - Technical Specs

Flow Rates 46 SCFM to 360 SCFM

Pipe Size Inlet Flow Rate
(SCFM)*		 Dimensions (Inches) Weight
(Lbs)		 # of
Cartridges		 Unit Model Included Water
Separator
A B C D E F
1" 45 25.79 14.96 12.2 2.99 1.97 23.62 101.4 2 PD0046 A30050WS
1" 55 28.94 14.96 12.2 2.99 1.97 27.56 112.4 2 PD0056 A30070WS
1" 75 35.63 14.96 12.2 2.99 1.97 33.46 136.6 2 PD0075 A30125WS
1" 90 40.55 14.96 12.2 2.99 1.97 39.37 154.3 2 PD0090 A30175WS
1" 110 49.61 14.96 12.2 2.99 1.97 27.56 187.3 4 PD0110 A30175WS
1" 150 62.8 14.96 12.2 2.99 1.97 33.46 231.4 4 PD0150 A30175WS
1" 180 72.64 14.96 12.2 2.99 1.97 39.37 269 4 PD0180 A30175WS
1.5" 220 49.61 14.96 19.29 2.99 2.44 27.56 339.5 8 PD0220 A30280WS
1.5" 300 62.83 14.96 19.29 2.99 2.44 33.46 430 8 PD0300 A30400WS
1.5" 360 72.64 14.96 19.29 2.99 2.44 39.37 496 8 PD0360 A30400WS
 

*Stated flow capacities based on an inlet pressure of 100 psig, inlet temp of 95°F and outlet pressure dewpoint of -40°F.
For capacities at other conditions, please refer to the correction factors.
Flow rates referenced to standard conditions, 68°F at 14.7 psia, and 0% relative water vapor.

Service Kits

Silencer Service Kit: 6,000 Hours

Silencer Kit
Dryer Model Kit Number
PD0046-PD0090 PD3SK01
PD0110-PD0180 PD3SK02
PD0220-PD0360 PD3SK03

Cartridge Service Kit: 12,000 Hours

Includes desiccant cartridges and associated seals, silencer service kit, and cartridge removal tool.
Dryer Model # of
Cartridges		 Kit Number
Standard Cartridges PD0046 2 PDSK0046-12000
PD0056 2 PDSK0056-12000
PD0075 2 PDSK0075-12000
PD0090 2 PDSK0090-12000
PD0110 4 PDSK0110-12000
PD0150 4 PDSK0150-12000
PD0180 4 PDSK0180-12000
PD0220 8 PDSK0220-12000
PD0300 8 PDSK0300-12000
PD0360 8 PDSK0360-12000
High Performing Cartridges PD0046 2 PDSK0046-12000-H
PD0056 2 PDSK0056-12000-H
PD0075 2 PDSK0075-12000-H
PD0090 2 PDSK0090-12000-H
PD0110 4 PDSK0110-12000-H
PD0150 4 PDSK0150-12000-H
PD0180 4 PDSK0180-12000-H
PD0220 8 PDSK0220-12000-H
PD0300 8 PDSK0300-12000-H
PD0360 8 PDSK0360-12000-H

Cartridge Service Kit: 24,000 Hours

Includes desiccant cartridges and associated seals, silencer service kit, valve service kit, and cartridge removal tool.
Dryer Model # of
Cartridges		 Kit Number
Standard Cartridges PD0046 2 PDSK0046-24000-S24
PD0056 2 PDSK0056-24000-S24
PD0075 2 PDSK0075-24000-S24
PD0090 2 PDSK0090-24000-S24
PD0110 4 PDSK0110-24000-S24
PD0150 4 PDSK0150-24000-S24
PD0180 4 PDSK0180-24000-S24
PD0220 8 PDSK0220-24000-D24
PD0300 8 PDSK0300-24000-D24
PD0360 8 PDSK0360-24000-D24
High Performing Cartridges PD0046 2 PDSK0046-24000-HS24
PD0056 2 PDSK0056-24000-HS24
PD0075 2 PDSK0075-24000-HS24
PD0090 2 PDSK0090-24000-HS24
PD0110 4 PDSK0110-24000-HS24
PD0150 4 PDSK0150-24000-HS24
PD0180 4 PDSK0180-24000-HS24
PD0220 8 PDSK0220-24000-HD24
PD0300 8 PDSK0300-24000-HD24
PD0360 8 PDSK0360-24000-HD24
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