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Regenerative Heated Desiccant Air Dryer for Psa Nitrogen Generator Purification System

1.Ultra-low dew point (suitable for demanding industries such as pharmaceuticals and electronics)
2. Energy-efficient and efficient (reduces regeneration gas consumption compared to heatless regeneration)
3.Stable and reliable (dual towers operate alternately for continuous gas supply)
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  • SRD-06

  • Rocky

This dryer combines PSA technology with a small built-in heater to boost regeneration efficiency. While one tower handles moisture removal from the compressed air, the other uses a combination of purge air and low heat to regenerate. The result is significantly lower purge air loss than a heatless design, paired with a reliable -40°C pressure dew point.


Working Principle

Adsorption Phase: Wet air passes through the desiccant tower, where moisture is adsorbed and dry air is output.

Regeneration Phase: A heater heats the desiccant, desorbing moisture. A small amount of dry air (regeneration gas) then removes the moisture, restoring adsorption capacity.

The two towers operate alternately: one tower adsorbs while the other regenerates, ensuring a continuous air supply.SRD-06-(13)

Why It Stands Out

Purge air consumption is just 5–8% of rated flow—heatless dryers require 12–15%.

A compact heater (usually under 2 kW) activates only during regeneration, so energy costs stay low.

Delivers consistent -40°C dew point even when inlet conditions fluctuate.

Takes up less floor space—vessels are smaller than those in heatless dryers with equivalent capacity.

Designed for operations where energy efficiency and uncompromising air quality go hand in hand.


Technical Parameters

SRD Series Heated desiccant air dryer
Model

Air Delivery

 (m3/min)

Voltage
(V/HZ)
Power (kW) Inlet/Outlet
(PT)
Dimension (mm) Weight (Kg)
L*W*H
SRD-01 1.20 220V/50HZ 1 RC1” 670*500*1305 135
SRD-02 2.4 220V/50HZ 1 RC1” 670*580*1685 170
SRD-03 3.2 220V/50HZ 1 RC1” 850*580*1450 240
SRD-06 6.5 220V/50HZ 2 RC1 1/2” 1025*700*1700 285
SRD-08 8.5 220V/50HZ 2 RC2” 1100*700*2050 255
SRD-10 11.50 380V/50HZ 3 RC2” 1200*500*2173 526
SRD-12 13.50 380V/50HZ 3 RC2” 1300*500*2183 605
SRD-15 17.00 380V/50HZ 5 DN65 1280*820*2360 712
SRD-20 23.00 380V/50HZ 6 DN80 1400*930*2530 848
SRD-25 27.00 380V/50HZ 8 DN80 1650*990*2450 1150
SRD-30 34.00 380V/50HZ 9 DN80 1700*955*2410 1328
SRD-40 45.00 380V/50HZ 12 DN100 1950*1000*2550 1674
SRD-50 55 380V/50HZ 15 DN100 2010*1170*2650 2100
SRD-60 65 380V/50HZ 18 DN125 2160*1470*2705 2707
SRD-80 85 380V/50HZ 24 DN150 2420*1550*2800 3573
SRD-100 110 380V/50HZ 30 DN150 2500*1650*2800 4639
SRD-120 130 380V/50HZ 36 DN150 2650*1650*2800 5100
SRD-150 155 380V/50HZ 45 DN200 2800*1300*2900 5586


Main Application Areas

From laser cutting (keeping optics clear) to CNC machining (protecting spindles), this dryer is a fit wherever dry air matters. It also serves pharmaceutical lines, food and beverage production, electronics manufacturing, and automotive paint booths—each benefiting from stable, moisture-free compressed air.


FAQ

Q1: Which is more gas-efficient, heated adsorption or heatless adsorption?

✅ Heated adsorption is more energy-efficient because it uses electric heating for regeneration and requires only a small amount of compressed air (approximately 5-7%); heatless adsorption, on the other hand, consumes 15% of compressed air for purge regeneration.


Q2: How often should the desiccant be replaced?

⏳ Typically, every 2-5 years (depending on air quality and frequency of use). If the dew point rises or the pressure drop increases, the desiccant should be inspected.


Q3: Can it be used with high-temperature compressed air?

️ An aftercooler is required because the adsorbent's adsorption capacity decreases at high temperatures (>120°F).


Q4: Will heated regeneration damage the desiccant?

⚠️ Overheating (>300°F) can cause the molecular sieve to fail, so an appropriate regeneration temperature should be selected (usually around 250°F).


Q5: How can I reduce energy consumption?

Adopt dew point control (DPC) system to adjust the regeneration cycle according to demand to avoid overheating.

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