Accessories / Options
Hi-Level Alarm- An effective means to prevent overfilling of tank is always suggested. In many cases both a primary (metering, scale/weight) and secondary (Hi-Level Alarm on Loading Arm) may be in place.
♦ For Clear, Light Non-Viscous Materials
♦ For Dark, Viscous Materials
A variety of probe styles, manufacturers can be adapted to fit on your OPW Loading Arm. We have experience with most major overfill brands.
Vapor Recovery- Concern for the environment and your employees is of utmost concern. Several options are available to help retain and recover harmful vapors and avoid excessive splashing, each customized to fit your application. For more information on Vapor Recovery Solutions:
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.
Vacuum Breaker
OPW Engineered Systems Vacuum Breakers permit quick, positive evacuation of the arm after the loading operation is complete. Suggested for any top load/submerged fill application.
• Model 476SA – Aluminum with stainless steel internals, fluorocarbon seal, ½ MNPT , OPW Model 476SA-0150
•Model 489 – 316 Stainless Steel construction, metal seat, MNPT, available in ½” (OPW Model 489-0050) and 1” (OPW model 489-0060)
Lockdown- available to help insure that your loading arm stays securely in vehicle during loading operation. Several options available depending on your application.
Deflectors – Loading arm drop tube can be provided with deflector to help minimize the risk of staic build-up and/or product foaming. Can also be used to redirect the upward pressure in order to keep the arm from attempting to rise out of tank during loading.
463 Deflector (Cone)
- Aluminum Construction
- 3” & 4”, FNPT
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464 Deflector (Tee)
- Aluminum Construction
- 3” & 4”, FNPT
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Strainers- Loading arm drop tube can be provided with a cast aluminum suction strainer when unloading tank cars. Helps prevent scale and other foreign objects from being sucked into line.
341 Suction Strainer
- Cast Aluminum
- Galvanized steel screen
- 3” & 4” FNPT
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Loading Valves
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” Top Unloading Arm
Ductile Iron/Carbon Steel/ Aluminum Construction
Aluminum Load Valve
77” x 77” x 43” Drop
B32F-3
With remote (
B32RF-3)
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Same as above in 4” (
B32F-4)
With remote (
B32RF-4)
• Same as above in 6” (
B32F-6)
With remote (B32RF-6)
• 3” Top loading Arm
Stainless Steel/PTFE Construction
78” x 90” x 66” Drop
B32F-G760
60”x 60” x 60” Drop
EB33F-G940
This popular OPW top loading arm is specifically designed for those applications where smooth handling and wide working range is required. Especially useful for top loading of railcars or multi-compartment tank trucks.
B32RF & B32F Brochure