Accessories / Options
Heating- Loading Arms can be fully or partially jacketed for efficient handling of asphalt, molten sulfer, waxes, resins and other products that are highly viscous or tend to solidify at ambient temperatures.
Loading Arm Insulation - Can provide a Custom Insulation Package designed specifically for your loading arm. Unlike field-applied insulation, these packages are completely removable and reusable, making them the ideal solution for loading arm use.
Loading Systems Catalog 
Heating – Loading Arms can be fully or partially jacketed for efficient handling of asphalt, molten sulfer, waxes, resins and other products that are highly viscous or tend to solidify at ambient temperatures. For more information on Heated Loading Solutions:
Loading Systems Catalog
Loading Arm Insulation – OPW can provide a Custom Insulation Package designed specifically for your loading arm. Unlike field-applied insulation, these packages are completely removable and reusable, making them the ideal solution for loading arm use.
Loading Arm Insulation Spec’s:
• Removable & Reusable
• Safer – Heated arms can pose a potential burn hazard to operators. OPW Insulation Packages ensures that the loading arm is properly insulated to protect your personnel.
• Superior Heat Retention
• Durable
• Construction Details:
- Inner Jacketing – 17 oz/sq. yd Teflon® Impregnated Fiberglass Cloth
- Outer Jacketing - 17 oz/sq. yd Teflon® Impregnated Fiberglass Cloth
- Insulation – 2” THK, low-density Fiberglass
- Thread - Teflon®-coated Fiberglass Thread
- Attachments - Teflon® Cloth Belts with stainless-steel double-D rings; drawstring flaps with Nomex Cord
- I.D. Tags – Stainless-steel embossed
Grounding/Bonding – Suggested for many top/splash loading applications. Available as an option on all Loading Arm designs.
The electronic grounding unit MT30 allows safe loading and unloading of mobile tanks (mounted on trucks, wagons or trolleys and also big bags) in which flammable substances are poured at high speed generating electrostatic charges that can cause sparks and explosions.
Protects your equipment, piping and personnel in the event of an unintended pull-away. A consideration whenever you are making a tight connection to a truck or railcar.
With OPW, you have many options at your disposal for your loading arm termination connections. From the original quick-disconnect Kamlok® coupling to our Epsilon™ dry disconnect coupling, we have a coupling to meet your needs.
6400 Series Horizontal Valve – OPW Loading Valves are designed to shut off flow without causing shock in the pipeline.
Adjustable closure rate
3” & 4” sizes, Aluminum Construction
TTMA Flanged connections
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Ball Valves (per application/specification)
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Pnuematic Counterbalancing – an alternative to conventional spring balanced loading arm, pneumatics provide the ultimate in loading arm design.
Loader Library
All OPW Loading Arms can be customized to fit your specific application requirements. We do offer a series of Standard/ optimized solutions that are commonly specified. These optimized selections can be expedited to meet faster delivery requirements.
3” Bottom loading Arm
Ductile Iron/Carbon Steel/ Aluminum Construction
42” x 66”
G32FNV-3
Same as above in 4” (
G32FNV-4)
Designed to provide flexible long-range operation, the heavy-duty unsupported boom type bottom loader configuration is both reliable and easy to use. A minimum of five swivel planes of rotation offer complete flexibility in making tight connections for loading and unloading rail cars and tank trucks. The outboard swivel and arm adjusts for any changes in elevation or tilting that may result as the vehicle is loaded or unloaded. The unsupported boom type loader is extremely versatile and many variations are possible. It can be equipped with dry disconnect coupler, union, quick coupling, or other customer specified end fitting to make connections on the side, at the rear, or underneath the vehicle. The intermediate swivel is often 2” – 6” sizes available inverted to achieve the low profile and clearances needed to connect to the underside of a rail car. 
G32F & G33F Brochure