AIR COMPRESSORS & DRYERS // AIR SYSTEMS 27 Refrigerated Air Dryers Refrigerated Air Dryers SIZING A 3-IN-1 HIGH INLET DRYER Follow the steps below to size your dryer: 1 Use the table below that identifies your inlet temperature to your dryer. 2 In the chart select the inlet pressure that will be entering your dryer. 3 Determine SCFM to compensate for air line leaks and pressure drops. RULE OF THUMB CALCULATION ROTARY SCREW AIR COMPRESSOR SCFM = Compressor HP x 4.5 RECIPROCATING AIR COMPRESSOR SCFM = Compressor HP x 3.5 4 Select the SCFM requirement for your dryer based on the SCFM coming out the air compressor. EXAMPLE: What size dryer should be used? Customer has a 20 HP reciprocating compressor. The inlet temperature to the dryer is approximately 120°F. The pressure entering the dryer is 140 PSI. 1 Identify the table that shows 120°F (in this example it would be table 3). 2 From the same table (table 3) select the inlet pressure of dryer. In this example (140 PSI). 3 Use Rule of Thumb Calculation to determine SCFM. 20HP x 3.5 = 70 SCFM 4 Locate 70 SCFM under 140 PSI column. Follow across to dryer part number. ANSWER: Customer needs part number 3530. 105-00015 ASCOT NO. MFG. NO. 105-00015 105-00025 CRN15 CRN25 105-00035 CRN35A1 105-00050 CRN50A1 105-00075 CRN75A1 105-00100 CRN100A1 105-00125 CRN125A1 105-00150 CRN150A1 FLOW VOLTAGE 15 25 35 50 75 100 125 150 IN/OUT CONNECT. 115 or SIZE (LXWXH) 115/1/60 3/8" OD 15x12.6x12.6 115/1/60 1/2" NPT 1/2" NPT 26x19x21 26x19x21 230/1/60 115 or 230/1/60 115 or 230/1/60 115 or 230/1/60 115 or 230/1/60 115 or 230/1/60 CHAMPION CRH SERIES HIGH INLET TEMPERATURE REFRIGERATED AIR DRYER MFG. NO. 100 PSIG CRH20 CRH25 CRH35 CRH50 CRH75 CRH100 CRH125 150 PSIG TABLE 1: 180° INLET 18 23 32 45 68 91 22 27 38 54 81 114 108 135 175 PSIG 23 29 41 58 87 116 145 MFG. NO. CRH20 CRH25 CRH35 CRH50 CRH75 CRH100 CRH125 100 PSIG 150 PSIG TABLE 2: 150° INLET 21 26 37 52 78 105 131 25 31 44 62 93 124 155 175 PSIG 26 33 47 67 100 133 167 MFG. NO. CRH20 CRH25 CRH35 CRH50 CRH75 CRH100 CRH125 1/2" NPT 3/4" NPT 1" NPT 1" NPT 1" NPT 26x19x21 33x25x26 38x29x20 38x29x20 38x29x20 APPROX. SHIP WEIGHT (LBS.) 69 Lbs. 142 Lbs. 146 Lbs. 152 Lbs. 209 Lbs. 251 Lbs. 273 Lbs. 279 Lbs. REFRIGERATED AIR DRYERS - SPECIAL FEATURES: • Effective moisture removal at all flow rates • Combination separator/filter • Ideal for air compressors equipped with an air cooled aftercooler 100 PSIG 150 PSIG TABLE 3: 120° INLET 23 30 42 59 88 118 29 35 49 70 148 105 140 176 175 PSIG 30 38 53 75 113 151 189 WARNING: For more information go to www.P65Warnings.ca.gov. SUPPLY CORPORATION ASCOT SUPPLY CORPORATION BUYER'S GUIDE AIR SYSTEMS // AIR COMPRESSORS & DRYERS
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