HEATLESS COMPRESSED AIR / GAS DRYERS

Introduction :
The presence of oil, moisture and dust particles in compressed air is a well known fact for industrial applications. As the technology advanced with inducation of sophisticated modern machineries working on compressed air, the usage of recommended quality class of air as per machines manufacturer or international Standard Organisation (ISO) or Pneurope recommendation has become necessary. The usage of filtered, dry air as per above recommendations results in reduced wear and tear, increased machine uptime, lower rejections, better product quality and above all considerable saving in energy.

Drytech Air Drying Unit-HD series (Heatless) type offers quality class of air desired as per various recommendations for different pneumatic applications. The stationary air drying unit with negligible maintenance, lesser operating cost and longer service life is the right selection for pneumatically operated machines which needs purified compressed air.

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Salient Features :
• Operating on ADSORP principle; Hence prevents entrainment of moisture in the pipe line however long is may be.
• The most compact skid mounted unit supplied in READY FOR USE state by connecting compressed air at inlet
and outlet.
• The stationary working system and requires negligible maintenance.
• Assured atmospheric dew point equal to (-) 40 deg. C. or (-) 70 deg C as required.
• Ideal purging as per desiccant manufacturers instruction for regeneration.
• Lesser pressure drop in total unit.
• Modified purge silencer causing less noise.
• Designed for Indian atmospheric condition.
• Easy for installation and commissioning.

Sequence of Drying Operation.

It is as per following three stages
Prefiltration :
The dust particles, condensed oil and moisture in liquid droplets and aerosol from is per-filtered by set of pre-fine filter combination, The Compressed air with only vapourised from of moisture is permitted to enter the desiccant bed tower.

Drying :
The Saturated Compressed air is dried in desiccant bed tower.

Postfiltration :
The dry compressed air is refiltered in after filter for removal of residual fine particles if any.

Mini Dryer

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Operation :

The complete ADU operates in following three modes.
Drying Mode :
The wet saturated compressed air coming from set of pre filters is led through one of the inlet valve (Operated by electronic timer) to the desiccant bed tower. The highly hygroscopic desiccant bed with sufficient air resident time due to proper velocity results in absorbing the moisture vapour and dries the air to desired level of dew point.

Regeneration Mode :
The small amount of dried air at almost atmospheric pressure is led through purge line to the saturated desiccant bed tower. The absorbed moisture in desiccant bed at earlier drying mode is desorbed in purged dry air and regeneration takes place.

Pressurisation Mode :
To avoid the pressure fluctuations at outlet of dryer, the regeneration mode tower is put in for pressurisation before it switches to drying mode. The entire operation is electronic timer controlled and automatic at various modes shown above for proper sequence and timing. The total cycle time is 10 minutes or 4 minutes as per timer selection for required dew point.

Quality of air at outlet :	Application : To various engineering applications where atmospheric dew point is preferred (-) 40 °C and above.
Location : After Air Receiver in comp. air system.	Dust : <5 u
Residual Oil : upto 0.1 PPM	Moisture : (-)40 / (-)60⁰C Atm. Dew Point
Range : upto 1140 SCFM flow	Pressure : 10 Kg / cm²

AIR DRYING PLANT

	Type : Package consisting of common skid with provision for bare compressors mounting, Inlet / Outlet Air receiver with Dryer having fine filter combination & by-pass arrangement to deliver consistent quality air & pressure at outlet.
	Range : upto 60 SCFM flow
	Pressure : 10 kg/cm³

FLOW CAPACITY AT INLET FOR VARIOUS MODELS AT 7 Kg/cm2g OP.PRESSURE

S/N

MODEL

FLOW
NM/HR	SCFM

END CONN.

CONN. TYPE

OVERALL DIMENSION IN MM
Depth	Width	Height

WT. KGS.
(APPX)

HD V

¼”

½” BSP SC. F

150

550

670

HDV1

½”

½” BSP SC. F

410

700

1050

HD V2

½”

½” BSP SC. F

410

750

1280

HD V3

½”

½” BSP SC. F

410

750

1670

HD 001

½”

½” BSP SC. F

450

750

1850

120

HD 001 V

¾”

¾” BSP SC. F

450

800

1680

150

HD 002

100

¾”

¾” BSP SC. F

500

850

1780

170

HD 002 V

130

¾”

¾” BSP SC. F

500

850

1960

198

HD 003 V

170

100

1”

1” BSP SC F

550

1000

1650

227

10.

HD004 V

240

140

1 ½”

FLGD.ASA 150#

550

1000

2100

274

11.

HD007

340

200

1 ½”

FLGD.ASA 150#

600

1180

2230

350

12.

HD009 V

475

280

2”

FLGD.ASA 150#

600

1300

2300

498

13.

HD012 V

650

380

2”

FLGD.ASA 150#

1150

1450

1950

650

14.

HD016 V

850

500

2 ½”

FLGD.ASA 150#

1275

1600

2350

790

15.

HD020 V

1050

620

3”

FLGD.ASA 150#

1380

1725

2480

925

16.

HD025

1290

760

3”

FLGD.ASA 150#

1530

1850

2550

1125

17.

HD038

1940

1140

4”

FLGD.ASA 150#

1800

1690

2625

1570

* Note : High Pressure and low pressure and low pressure can be supplied on demand.