12 AIR SYSTEMS ASCOT SUPPLY FLEET CATALOG | 2023 AIR COMPRESSORS 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. 4. Select the SCFM requirement for your dryer based on the SCFM coming out of the air compressor. RULE OF THUMB CALCULATION ROTARY SCREW AIR COMPRESSOR SCFM = Compressor HP x 4.5 RECIPROCATING AIR COMPRESSOR SCFM = Compressor HP x 3.5 5. Once the correct HP rating has been selected based on the air volume requirements, you will need to know the type of available electric service to determine the need for a single phase or three phase compressor. 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. 3. Determine SCFM to compensate for air line leaks and pressure drops. 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 105-00015 Ascot No. Mfg. No. 105-00015 CRN15 105-00025 CRN25 105-00035 CRN35A1 Flow Voltage 15 25 35 105-00050 CRN50A1 50 105-00075 CRN75A1 75 105-00100 CRN100A1 100 105-00125 CRN125A1 125 105-00150 CRN150A1 150 In/Out Connect. SIZE (LxWxH) Approx. Ship Weight (LBS.) 115/1/60 3/8" OD 15x12.6x12.6 69 Lbs. 115/1/60 1/2" NPT 26x19x21 1/2" NPT 26x19x21 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 1/2" NPT 26x19x21 3/4" NPT 33x25x26 1" NPT 1" NPT 1" NPT 38x29x20 38x29x20 38x29x20 115 or 230/1/60 142 Lbs. 146 Lbs. 152 Lbs. 209 Lbs. 251 Lbs. 273 Lbs. 279 Lbs. CHAMPION CRH SERIES HIGH INLET TEMPERATURE REFRIGERATED AIR DRYER TABLE 1: 180° INLET TABLE 2: 150° INLET Mfg. No. 100 PSIG 150 PSIG 175 PSIG CRH20 CRH25 CRH35 CRH50 CRH75 CRH100 CRH125 18 23 32 45 68 91 114 22 27 38 54 81 108 135 www.ascotsupply.com 23 29 41 58 87 116 145 Mfg. No. 100 PSIG 150 PSIG 175 PSIG CRH20 CRH25 CRH35 CRH50 CRH75 CRH100 CRH125 21 26 37 52 78 105 131 25 31 44 62 93 124 155 26 33 47 67 100 133 167 TABLE 3: 120° INLET Mfg. No. 100 PSIG 150 PSIG 175 PSIG CRH20 CRH25 CRH35 CRH50 CRH75 CRH100 CRH125 23 30 42 59 88 118 148 WARNING: For more information go to www.P65Warnings.ca.gov. 29 35 49 70 105 140 176 30 38 53 75 113 151 189
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