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Air/Oil Tank DimensionsDimensions in inches (millimeters)MODEL A B C D E F G H IAOT-3AOT-67.69(195)13.16(334)6.25(159)9.50(241)4.25(108)6.31(160)3.50(88.9)5.56(141)1.75(44.5)2.78(70.6)½-14NPT¾-14NPT¼-18NPT¾-14NPT½-14NPT¾-14NPT.41(10.3).66(16.7)External Accumulator CircuitsAir/Oil Systems provide a convenient way for additional heat dissipation and extends the cycles per hour capability of ashock absorber. Air/Oil Systems also can be used to extend the functionally of a shock absorber by delaying the pistonrod return.Units requiring an external accumulator, or fluidreservoir, are normally installed in one of threesystem configurations.Figure 1 is the simplest and is utilized purely forheat dissipation. The oil has a positive circulationpath to supply cool oil to the shock absorber.The air/oil tank may be either closed, or openand vented through a filter breather unit. SpecifyFig. 1Fig. 2Fig. 3a spring or mechanical return shock absorbermodel with an external accumulator.Figure 2 provides a filtered, pressurized, positivecool oil circulation path. Specify an air orALDSALDALDmechanical return shock absorber model with anexternal accumulator. Operating pressure 50 to 100 PSI or 3.3 to 6.6 Bar.Figure 3 uses a solenoid valve to return the shock absorbers piston rod to the extended position on demand. The systemalso uses a filtered, pressurized, positive cool oil circulation path. Specify an air return shock absorber model with anexternal accumulator. Operating pressure 50 to 100 PSI or 3.3 to 6.6 Bar.25Installation Tips for Air/Oil Systems1. Do not install Air/Oil Systems with any shock that has an internal accumulator.2. Make certain that all air return shocks are used with an Air/Oil tank.3. Install shocks with the ports facing up and the Air/Oil Tank elevated above the shocks.4. Check for proper size tank, especially when using one (1) tank with two (2) shocks.5. Check tank for proper oil level and correct bleeding-approximately half-full.6. Do not allow a shut-off valve to be installed between the tank and the shock.7. Fittings and line size should be equal to or greater than the shock connection port.8. On recirculating installations, make sure the check valves are properly installed.9. Make sure incoming air is filtered to remove all water and contaminants.23435 Industrial Park Dr., Farmington Hills, MI 48335 • p: 734-595-4500f: 734-595-6410 • customerservice@enertrols.com • www.enertrols.com
Installation Recommendations and TipsMounting Structure ConsiderationsEnertrols shock absorbers should be rigidly bolted to a non-flexing mounting structure. Refer to the "MountingStrength Required" column in the Energy Capacity table for the model you have selected.Avoid side loads of more than 5º (3º for miniature models) and align the centerline of the piston as closely aspossible to the impacting object's center of gravity. When using more than one shock absorber for a direction,be sure to balance the load as equally as possible between the shock absorbers.Rotary Installation RequirementsThe shock absorber should be mounted so that it is perpendicular to the pivot at mid stroke. This allows themaximum 5 degrees on the first 1/2 stroke and the maximum 5 degrees for the second 1/2. Miniature shockabsorbers only are limited to plus or minus 3 degrees. Poly pads should not be used with rotary applications.Rs (Radius to Shock Absorber)Plus 5 degrees Maximum at ImpactPerpendicularat Mid-StrokeMinus 5 degrees Maximum at Set-DownaaStrokeFormulaS < *No. = aRsExternal Stop Recommendations+/- MaximumMounting Angle.0175 = 1/2º.0349 = 1º.0524 = 1-1/2º.0699 = 2º.0875 = 2-1/2º+/- MaximumMounting Angle.1051 = 3º.1228 = 3-1/2º.1405 = 4º.1584 = 4-1/2º.1763 = 5º*Miniature models; 3 degrees maximum, all others 5 degrees maximumGeneral rule of thumb for minimum shock mount radius is a 6:1 ratio (Rs to S). For example with1 inch (25mm) of shock absorber stroke, the minimum “Rs” mount radius is 6 inches (150mm).Every type of automation equipment requires some form of external stop for two reasons; (1) to provide a firmwork positioning point and (2) to prevent the shock absorber from bottoming out. All shock absorber manufacturersrecommend to use an external stop to prevent damage to their product. Enertrols recommends shockabsorber installations to use full stroke minus .06" or 1.6mm from the bottom of stroke.Enertrols "Positive Stop Systems" are easy to use and the most economical answer in new applications. ThePositive Stop Options provide a substantial, hardened steel work position stop (.06" or 1.6mm from bottom ofstroke) as well as shock absorber mounting arrangements. They are available for Gold Line ® , SILVERLINE ® ,Mid-Size, HPM, in Primary and Fixed Flange models.General InformationHow Short Stroking Affects a Shock Absorbers PerformanceEnertrols recommends choosing a shock absorber with the proper stroke and using the full stroke for deceleration.Short stroking a shock absorber produces undesirable, results, that may permanently damage the shock absorberas well as the equipment it is mounted on.Short stroking changes the intended function of a shock absorber so that it cannot be adjusted easily or properly.There will be a hard impact at the beginning of stroke. Velocity will not be dissipated sufficiently through stroke,allowing for a hard impact set down. The last problem incurred is overheating and or damage from excessiveinternal pressures produced by the energy and not using all the internal orifices as designed.23435 Industrial Park Dr., Farmington Hills, MI 48335 • p: 734-595-4500f: 734-595-6410 • customerservice@enertrols.com • www.enertrols.com26
Page 3: Any mechanism that moves and that m
Page 8 and 9: Construction & Design FeaturesMinia
Page 10 and 11: Standard Shock AbsorbersGold Line
Page 12 and 13: Accessories & Special Application S
Page 14 and 15: Selecting the Correct Type of Shock
Page 16: Selecting the Correct Size Shock Ab
Page 19 and 20: Example 9Horizontal-Moving Load-Rot
Page 21 and 22: Example 16Vertical-Rotating Beam Dr
Page 23 and 24: Example 22Vertical Rotating Arm - C
Page 25 and 26: Model Rating ChartsShock Absorber S
Page 27 and 28: Self-Compensating ECA ModelsModel N
Page 29: Construction and Parts Descriptions
Page 33 and 34: Additional Enertrols ProductsShock
Page 35 and 36: SM 9 to SM 75MFSub-Miniature Shock
Page 37 and 38: SNALD 150 to 600Miniature Shock Abs
Page 39 and 40: SNALD 1/2 Bore x 1, 2"Miniature Sho
Page 41 and 42: SA 30 to 150 & 1/4" BoreMiniature S
Page 43 and 44: SALD 3/8 Bore x 1"Miniature Shock A
Page 45 and 46: SALD 1/2 Bore x 1, 2"Miniature Shoc
Page 47 and 48: Industrial Shock AbsorbersWeartec P
Page 49 and 50: SNALD 33, 45 & 64 SeriesOrdering In
Page 51 and 52: SNALD 33 SeriesMid-Size Shock Absor
Page 57 and 58: AccessoriesSNALD Mid-Size 33, 45 &
Page 59 and 60: SALD ½ x 1, 2-P, SALD ¾ x 1, 2, 3
Page 61 and 62: Gold Line ® & Silverline ® Primar
Page 63 and 64: Retention Kit for MSC Installations
Page 65 and 66: SALD 3/4, 1-1/8,1-1/2, 2-1/4Gold Li
Page 67 and 68: Positive Stop Collar (-PSC) for Fix
Page 69 and 70: SILVERLINE ® SeriesDimensions in i
Page 71 and 72: High Precision Metric (HPM) Series
Page 73 and 74: EA 2 to EA3Heavy Industrial Shock A
Page 75 and 76: ECA and EA 2", 3" Bore SeriesECA Se
Page 77 and 78: ECA and EA 2", 3" Bore SeriesECA Se
Page 79 and 80: ECA 4" Bore SeriesHeavy Duty Models
Page 81 and 82:
Stacker Crane Shock Absorbers ESCS-
Page 83 and 84:
Stacker Crane Shock Absorbers ESCS-
Page 85 and 86:
Industrial Crane Bumper Shocks ECB-
Page 87 and 88:
Industrial Crane Bumper Shocks ECB-
Page 89 and 90:
Dimensions in inches and (mm)ABCD0.
Page 91 and 92:
AR0.27(R7)BC0.32(8.1)0.55(14)M8 x 1
Page 93 and 94:
Mounting Brackets for Hydraulic Dam
Page 95 and 96:
EDVC Velocity & Feed ControllersC51
Page 97 and 98:
EVC Velocity & Feed Controllers wit
Page 99:
Stocking DistributorsUSA, Canada an
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