HYDROBLOC LSC PURGE CURVES

Calculation of Purge Pressure Setting

1.Determine air pressure (psig) at the dryer inlet.

2.Refer to Table C-1. Determine the inlet airflow for your model and inlet air pressure.

3.To calculate purge flow consumption on the critical orifice curve:

Inlet Flow (SCFM) × 14.7 PSIG

× 1.15 = Purge (SCFM)

Inlet Pressure (PSIG) + 14.7 PSIG

4.Locate the Critical Orifice Calibration Curve that has been sized for your specific dryer model.

5.Cross the Purge Flow requirement calculated above to the same number on the Critical Orifice Calibra- tion Curve. Follow this line vertically and then hori- zontally once intersection is made with the curve line to find the actual purge pressure setting.

6.Locate the Purge Adjusting Valve. Slowly rotate dryer’s Purge Adjusting Valve until the Purge Pres- sure Indicator indicates the calculated purge pres- sure setting. (See following Note).

Note: The purge pressure can only be read and ad- justed when an off-line desiccant chamber has de- pressurized for regeneration. (When the off-line chamber is pressurized, the Purge Pressure Indica- tor will read “system pressure”.)

Table C - 1 Inlet Airflow at Various Inlet Air Pressures¹

 

 

 

 

 

Inlet Air Pressure (psig)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Model

60

70

80

90

 

100

110

 

120

130

140

150

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Average Inlet Airflow (scfm)²

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LSC60

23

27

30

33

 

36

39

 

42

45

49

52

LSC110

43

49

54

60

 

66

72

 

78

83

89

95

LSC130

51

58

64

71

 

78

85

 

92

98

105

112

LSC185

72

82

92

101

 

111

121

 

130

140

150

159

LSC240

94

106

119

131

 

144

157

 

169

182

194

207

 

 

 

 

 

 

 

 

 

 

 

 

 

LSC270

106

120

134

148

 

162

176

 

190

204

218

233

LSC360

141

160

178

197

 

216

235

 

254

272

291

310

LSC505

197

224

250

277

 

303

329

 

356

382

409

435

LSC630

246

279

312

345

 

378

411

 

444

477

510

543

LSC760

297

337

376

416

 

456

496

 

536

575

615

655

 

 

 

 

 

 

 

 

 

 

 

 

 

LSC1000

391

443

495

548

 

600

652

 

705

757

809

862

LSC1250

488

554

619

685

 

750

815

 

881

946

1,012

1,077

LSC1500

586

665

743

822

 

900

978

 

1,057

1,135

1,214

1,292

LSC2070

809

917

1,025

1,134

 

1,242

1,350

 

1,459

1,567

1,675

1,783

LSC2580

1,008

1,143

1,278

1,413

 

1,548

1,683

 

1,818

1,953

2,088

2,223

¹ Maximum inlet air pressure, 150 psig.

²Based on 100°F inlet air temperature and -100°F pressure dew point. Maximum recommended inlet temperature, 120°F. For capacity at inlet temperature higher than 100°F, consult your local distributor.

Specifications, Purge Curves and Replacement Parts for -100°F Pressure Dew Doint Dryers

C - 5

Page 89
Image 89
Deltech Fitness LS60, LS2580 Hydrobloc LSC Purge Curves, Table C 1 Inlet Airflow at Various Inlet Air Pressures¹

LS60, LS2580 specifications

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