OPW Unsupported Top Loading Boom Arm


Call 800-876-2826 for current pricing.



The unsupported boom arm is an excellent alternative for variable reach applications, especially in larger sizes where the outboard components are relatively heavy. It can be modified for closed system loading and unloading, and is available in various design configurations to meet the needs of virtually any installation.

This popular style loader is designed for those installations where it is undesirable or impractical to mount a supported boom arm. For example, many railcar sites have no support columns or overhead structures to which a supported boom can be attached.

The unsupported boom arm offers the same advantages as the supported boom arm, but maximum reach is somewhat less. It provides good flexibility for mis-spotting, and can be folded back against the rack for convenient, compact storage. When necessary, increasing the size of the base joint, or using a heavy-duty split flange swivel at the inlet, can extend total reach.


  • Available in 2″, 3″ and 4″
  • Available in carbon steel, stainless steel, aluminum and specialty alloys
  • Choice of flanged, threaded or all-welded construction


  • Optional valving allows liquid to be held in the line
  • Long reach compensates for mis-spotting
  • Compact storage