Pneumatic And Hydraulic Equipment Page 526

AIR COMPRESSORS VACUUM PUMPS A certain amount of air slips past each impeller blade during rotation and returns to the base of a succeeding blade for reacceleration-"regenerative." Blower System Design Tips In order to utilize your regenerative blower most efficiently, proper system design is essential. The most important thing to recognize is that by utilizing large diameter plumbing, friction losses in plumbing can be greatly reduced. Here are some guidelines to use when setting up your blower system: 1. The plumbing should at least be the same size as the blower port or ideally one size larger. The plumbing should remain this size until it has reached the location of the work area. 2. Elbows create additional friction which causes pressure loss and back pressure. Plumbing at least one pipe size larger than the blower pipe ports minimizes the friction loss they create. 3. The pressure/vacuum relief valve should be installed in a "T" which is at least one pipe size larger than that of the exhaust of the blower. To properly protect a large horsepower blower, set the relief valve to limit the blowers duty to 5" below its continuous duty rating. 4. The exhaust air temperature of the blowers increases with increasing duty. At duties over 70" of water it is too hot for most plastic pipe. Metal pipe must be considered. VACUUM-PRESSURE EQUIVALENCE TABLE Conversions In. H 2 O x .036 = Psi In. H 2 O x .074 = 1 in. Hg In. H 2 O x 1.868 = mm Hg In H 2 O x 2.491 = mbar mbar x .402 = "H 2 O Psi x 27.68 = "H 2 O In. Hg x 13.594 = "H 2 O Regenerative Blowers The Gast full line of Regenerative Blowers for high volume vacuum or compressed air applications offers both motor-mounted and separate drive models. Air flow capabilities range from 27 to 810 cfm, vacuum capabilities up to 184 in. H 2 O and pressure capabilities up to 284 in. H 2 O. TEFC electric motors are UL and CSA certified on several models and come in single and three- phase, dual frequency, and multi-voltage versions for worldwide applications; 12 volt DC is available on the smallest model. Horsepowers range from 1/8 to 16 HP. Special models with explosion-proof motors, 1/3 to 10 HP, are designed for soil vapor extraction applications. Consult JHF for special literature-these models are not shown on chart. A complete line of recommended accessories is also available. =Separate drive models POWER MAXIMUM MAXIMUM MODEL/ RATING AIR FLOW PRESSURE VACUUM SERIES (hp) (cfm) " H 2 O " H 2 O R1 1/8 27 28.5 26.5 R2 1/3, 1/2 42 39 35 R3 1/2 53 55 50 R4 1 92 52 48 R4P 1-1/2 127 65 60 R4H 6 128 284 184 R5 2-1/2 160 65 60 R6 2-1/2-5 215 45-105 35-88 R4M 9 252 170 137 R6PS 11 265 170 130 R6P 5-1/2 290 110 90 R7 10 420 115 95 R7S 16 420 180 130 R6PP 11 485 95 80 R7P 16 810 90 85 SDR4 4 147 110 90 SDR5 10 240 152 120 SDR6 15 300 163 135 SDR6P 15 360 150 135 Features Low Noise Oilless Mount in Any Position Maintenance-Free Continuous, Non-Pulsating Air Flow Compact Size Light Weight Typical Applications Air Tables Solution and Media Agitation Vacuum Hold-Down and Pickup Air Blow-Off Soil and Ground Water Remediation Carton Forming and Packaging Lab Filtration Sewage Aeration Materials Handling Aquaculture Pneumatic Conveying Gast (314) 427-0600 800-444-0522 (FAX) 314-427-3502 www. j hf.com JHF Catalog [ Volume 7 ] 526 Prices Subject to Change Without Notice John Henry Foster pneumatic and hydraulic equipment

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