Heavy Duty Balanced Opposed Compressors

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FOR MODELS: JG AND JGA SECTION 1 - DESIGN SPECIFICATIONS & DATA 3. Always apply a steady slow force to a torque wrench, do not jerk it. When a torque wrench is jerked the amount of torque applied can be as much as one and a half times the amount set on the wrench. For example, if a wrench is set at 80 lb x ft but is jerked, 120 lb x ft torque can be applied. 4. Always do the final tightening with a torque wrench. Do not tighten the fastener with a ratchet or impact wrench and then "check" the torque with a torque wrench. 5. Do not double tap a torque wrench. Rapidly double taping a torque wrench will make the torque on the bolt more than what is set by a significant amount. If it is desired to check the setting release all pressure on the wrench and then slowly apply a steady force until the click is felt. 6. Always reset the torque wrench to its lowest setting when the job is complete. If the torque wrench is left in a high setting the spring in it is stressed and will become inaccurate with time. If the torque wrench is put back to its lowest setting the spring will relax and retain its accuracy. 7. Do not use a torque wrench to break fasteners loose as it may overload the torque wrench and/or cause loss of calibration. 8. For applications requiring the use of a boxed end or crowsfoot adapter with a torque wrench to reach not readily accessible fasteners, the torque wrench setting will not be the actual torque applied to the fastener. 1 9. The ratio of actual torque at the fastener with that on the wrench scale is a function of the adapter's length and its position in relation to the torque wrench beam and the location on that at which the force is applied (see Figure 1-11:). Tw = Ta⎛ L ------------- ⎞ ⎝L + A⎠ Tw = Torque wrench setting, lb x ft Ta = Torque required at fastener, lb x ft L = Length of wrench, ft (from square drive end to center point of force on handle) A = Length of adapter, ft (measured through end of adapter on a line parallel to the center line of the wrench) These are general guidelines to assist in the proper use of torque wrenches. Consult with your torque wrench dealer for more detailed information. 1. The exception is when the adapter is 90° to the torque wrench. The torque will be the same as on the wrench scale (see Figure 1-12:). PAGE 1 - 20 11/01
FOR MODELS: JG AND JGA SECTION 1 - DESIGN SPECIFICATIONS & DATA Ariel Bolting FORCE FIGURE 1-11: TORQUE WRENCH WITH ADAPTOR AT ANY ANGLE FORCE FIGURE 1-12: TORQUE WRENCH WITH ADAPTOR AT RIGHT ANGLE Bolts have been selected that meet Ariel's strength, elongation, sealing and locking requirements. Proper bolting must be used and tightened to the values listed in Table 1-15 on page 1-15. Figure 1-13: is provided to assist in the identification of bolts used in an Ariel compressor. Connecting rod, valve cap and suction/discharge nozzle-Ariel supplied specialized companion flange-bolting is modified to prevent fatigue and cannot be replaced with standard bolts. If attempting to replace other bolting with standard bolts and there is any question, contact your packager or Ariel. Ariel supplied replacement bolting is recommended. 11/01 PAGE 1 - 21
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Heavy Duty Balanced Opposed Compressors

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