Pneumatic And Hydraulic Equipment Page 784

PSI Cylinder Bore 1 /2 2 1 /2 3 1 /4 4 5 6 7 8 10 12 0 .14 .15 .17 .19 .22 .25 .28 .32 .32 .36 .40 20 .10 .10 .12 .14 .16 .18 .20 .22 .22 .24 .26 40 .07 .07 .08 .09 .10 .12 .13 .14 .14 .15 .16 60 .04 .04 .05 .05 .06 .07 .07 .08 .08 .09 .10 80 .02 .02 .02 .02 .03 .03 .03 .04 .04 .04 .04 100 0 In/Sec Cylinder Bore 1 /2 2 1 /2 3 1 /4 4 5 6 7 8 10 12 6 155.6 275.5 499.8 969.3 1505.4 2603.2 4159.8 5794.2 8067.6 12,242 20,139 12 38.4 68.1 123.4 239.7 372.6 644.8 1030.2 1435.8 2000.4 3026 4971 18 16.7 29.7 53.7 104.6 162.8 282.1 450.6 628.7 876.8 1319.3 2162.1 24 9.2 16.3 29.4 57.3 89.4 155.2 247.8 346.2 483.6 722 1179 30 5.6 10.0 18.1 35.4 55.4 96.4 153.9 215.4 301.6 445.5 724 36 3.7 6.7 11.9 23.5 37.0 64.5 102.9 144.4 202.7 295.3 476.8 42 2.6 4.6 8.2 16.3 25.8 45.3 72.2 101.6 143.1 204.8 327.7 48 1.8 3.2 5.8 11.7 18.6 32.8 52.2 73.8 104.4 146 231 54 1.3 2.4 4.2 8.5 13.6 24.2 38.5 54.7 77.9 105.7 164.7 60 1.0 1.8 3.0 6.2 10.1 18.1 28.7 41.1 58.9 76.9 117.2 Norgren Ecology Cylinders offer these advantages: 3 Energy Absorption Capacity of the Patented Impact Dampening Seals* The patented impact-dampening Piston Seals in the Series EA & EJ cylinder allow for guaranteed, repeatable cushioning. The compressive qualities of the piston seals are predictable. The degree of seal compression at various supply pressures is documented. (See Energy Absorption Chart.) This allows you to compute the exact cylinder size required by knowing the weight (pounds) you are stopping at a given speed. * Patent No. 3,913,460 Series EA & EJ cylinders have a patented impact dampening piston seal that accomplishes 80% of the actual load stopping. The air cushion accounts for only 20%. (A conventional air cushioning cylinder depends 100% on the compressibility of air to do the stopping.) The EA & EJ seal absorbs high impact loads allowing the effect of the air cushion to be reduced by using a larger air cushion bleed orifice. As a result the piston can move at a faster speed for a longer period of time before the EA & EJ seal does the final stopping. On the reverse stroke the seal releases its compressive en- ergy to propel the piston away from the end caps, producing an immediate breakaway. As the piston continues its travel to the point of impact with the end caps, the compressive qualities of the seal provide the final decelerating force. This action compresses the seal and absorbs the remaining kinetic shock vibration and noise created by the impact. As the cushion spear enters the cushion cavity, the exhaust port becomes sealed off creating an air brake. This provides the initial deceleration in piston speed. The oversized air cushion bleed orifice permits the cushion pressure to exhaust with minimal restriction. This allows the piston to move quickly and smoothly through the cushion length. 1 Norgren Guarantees Non-lubricated Operation for a Full Year! The piston rod is self-lubricated by the oil-impregnated rod bearing during opera- tion. Lubrication between piston and cylinder barrel is derived from the polishing qualities of the reinforced Teflon wear ring. The low friction surfaces extend the life of the seals beyond normal expectations, per- mit ting Norgren to unconditionally guarantee non-lubricated operation for one full year. Series EA & EJ cylinders are NFPA inter- change able and are available in many different mounting styles. 2 Operates Quietly to Meet OSHA Specifications. Series EA & EJ cylinders provide substantial reduc- tions in impact noise, which reduces overall machine noise and helps meet government regulations. The summary of sound decibels chart illustrates the operating sound levels. The impact dampening qualities of the Piston Seals* are guaranteed for ONE FULL YEAR! *Patented Impact Dampening Piston Seals (No. 3,913,460) Summary of Sound Levels in Decibels + Peak sound pressure is given in decibels (dB) re:2 x 10 5 N/m 2 . ++End position of mike was 3' on centerline from end of cylinder; side position of mike was 3' perpendicular to centerline abeam of end of cylinder. Note: At 5 feet, cylinder sound levels would be less by 9 dB from side figure and 13 dB from end figure. The total noise emitted will depend on the structure to which the cylinder is attached. If it is mounted on a thin flat plate of considerable area, the noise will be increased by a sounding board effect. Effect of Impact Dampening Seals on Total Stroke of Cylinders *The weight of the cylinder piston has been deducted from the figures shown above. Note: The use of Viton Seals limits the absorption of the impact dampening seals by 50%. Energy Absorption Capacity of the Patented Impact Dampening Seals *Usable Pounds Stoppable at the Following Piston Speeds This chart features the energy absorption capacity of the patented impact dampening Piston Seals with a Non-Adjustable cushions. Increase ratings by 80% on cylinders with Adjustable cushions. For higher loads and velocities please refer to the Decel-Air Catalog. Note: These figures are for new cylinders. The impact dampening seals will take some compression set during operation of the cylinder and the stroke loss will decrease. Also, the pressure at zero stroke loss will decrease to about 80 psi. At pressures above those of zero stroke loss, a slight clicking sound may be produced during impact. To determine the stroke loss for either the head or cap end, divide the value shown by 2. PSI Air Sound Cylinder Bore & Stroke Pressure Level+ 5" x 6" 5" x 6" 2" x 6" 2" x 6" 95 End++ 108 73 110 74 PSI+ Side++ 112 84 110 81 50 End++ 108 73 113 74 PSI+ Side++ 113 85 110 81 Series EA & EJ, NFPA Air Cylinder, Impact Dampening Seals NFPA AIR CYLINDERS Norgren pneumatics (314) 427-0600 800-444-0522 (FAX) 314-427-3502 www. j hf.com JHF Catalog [ Volume 7 ] 784 Prices Subject to Change Without Notice John Henry Foster pneumatic and hydraulic equipment

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