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JPD SERIES

Externally Heated Desiccant Air Dryers

The JPD Series desiccant dryers are designed and built for plant & instrument air application where the lower purge consumption is required.
JPD Series dryers are using the small portion of purge air heated by external heater for regeneration.
SPX FLOW guarantees that JPD Series dryers will produce the design -40℃ PDP(standard) or -73℃ PDP(optional) while operating continuously at maximum rated flow (100% duty cycle).

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Product Features

Heater
  • JPD Series dryer is designed to use a low watt density heater with optional surface area.
Valves
  • High performance butterfly valves control the flow of air through the vessels.

  • Vessel are constructed to meet the requirements of ASME code, Section Ⅷ, Division 1 and stamped.

Operating Fundamental

  • Filtered compressed air enters on-line desiccant-filled, drying vessel A through butterfly valve.
    Up-flow drying enabled the desiccant to strip moistures from the air stream.
  • Clean, dry compressed air (-40℃ PDP) exits through check valve to feed the air system.
  • Vessel 2 (shown in regeneration mode) the butterfly valve for vessel B closed and the heater turns on the small portions of purge air (3% ~ 10%) are heated by the heater and flow downward in order to reactivate the moist-desiccant in vessel B, collecting water vapor before purge valve.
  • This purge air is exhausted through the purge valve.
  • Once the desiccant is fully desorbed, or the purge air temperature reaches 80℃ and the minimum regeneration time (90 minutes) has been exceeded, the heater turns off.
  • At a fixed time interval the butterfly valve at vessel B and vessel B will be placed on-line to the dry air stream and the butterfly valve at vessel A will close.
  • Operation will switch and vessel A will be regenerated.

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Customers worldwide look to us for the answers to their compressed air demands. Our product breadth provides an air treatment solutions for the most demanding applications. Our work is technical, our customer's challenges are complex and we pride ourselves on finding innovative and sustainable solutions.