OPW Loading Arms

Railcar Swing Arms

Truck Loading Arms

Distributors in 50 Countries, Choose Yours below...

866-761-7225 (Toll Free USA)

OPW Loading Arms

Loading Arm / Swing Arm / Boom Arm
Technology and Applications

Leave this field empty

Inquire About The Product On This Page

Close (x)
SafeRack Guarantee

Industry Types

Vehicle Types

Product Types

Loading Rack
Speciality Items

OPW Loading Arms

Loading Arm / Swing Arm / Boom Arm
Technology and Applications

loading arm provider

SafeRack's 200+ years of combined experience with loading arms allows us to walk clients through every step of the design process from swing arm style to dimensions and materials. We ensure your loading arm is designed and built to specifications and delivered on schedule, the first time.

Each OPW loading arm is designed for ease of operation and handling, which creates a faster, safer loading operation. The rugged construction of these loading arms makes down time and maintenance issues virtually non existent.

We routinely provide options such as overfill protection, vapor recovery, tracking and insulation to meet any requirement or regulation.

Loading Arm Technology

SafeRack and OPW bring you new loading arm technology which improves loading arm durability and maintenance...


The OPW Engineered Systems ENDURA™ swivel line represents leading innovation in swivel technology. Specifically designed for the transfer of hazardous materials such as LPG, acids, solvents, petrochemicals and other toxic fluids, ENDURA™ sets the industry standard in swivel performance and cost-effective operation. Featuring heavy-duty flanged construction and available in a variety of materials.


Heavy-duty construction and unique design features result in long-life, hassle-free performance.

Smooth, Easy Operation

The sealed, one-piece deep-groove dual ball bearing assembly ensures smooth and easy rotation.

Improves Uptime Performance

The simple, three-piece design allows for the quickest and easiest disassembly and repair in the industry, which means less downtime, less labor, and less cost.

Lowest Overall Cost of Ownership

Heavy-duty construction ensures long-life reliability while the unique design features allow for cost-effective preventive maintenance servicing and the easiest, most cost effective seal and bearing replacement of any swivel. Optimized performance, downtime prevention, and reduced maintenance time and costs make this the best overall swivel value in the industry.


360° Rotation

Full range of motion for ease of use. Deep-Groove Replaceable Dual Ball Bearing Technology – a precision-engineered, one-piece ball bearing assembly means there are no individual balls to deal with. If required, bearing replacement is quick and easy; simply replace the old bearing chamber with a new one. The ENDURA™ DSF 8900 Series features a 316 Stainless Steel replaceable dual ball bearing chamber.

Redundant Seal System

Incorporates a main seal, back-up seal, environmental seal and leak detection. If the main seal ever leaks due to normal wear, the back-up seal contains the fluid. Leakage is then channeled to a leak detection port in the side of the swivel to provide a visual indicator that service is required so the seals can be replaced. The environmental seal provides a third layer of protection, preventing liquid from entering the environment. Seal materials include Buna-N, Viton®, EPT, Kalrez®, Chemraz®, Silicone, and Food Grade.

Built-In Leak Detection

A visual indicator in the form of a leak detection port on the side of the swivel provides a quick and easy way to monitor seal leakage so preventive maintenance can be performed before a problem arises. The leak detection port can also serve as a purge port, permitting use of an inert blanket of gas to prevent product from escaping into the environment.


Available in 2", 3" and 4" sizes, and in a variety of construction materials, including carbon steel, stainless steel, Hastelloy®, Alloy20®, Monel® and other exotics. 500 PSI Pressure Rating

Torsion Spring-Balance Units

790 Series - EZ Adjust
Torsion Spring-Balance loading arm

The OPW Engineered Systems 790 Series EZ Adjust Loading Arm Spring-Balance permits any one of a full range of spring balance adjustments with a simple turn of the wrench.The 790 is the ultimate user-friendly solution to spring adjustment. With this technology, you no longer need to have the loading arm in the vertical position to make adjustments. In most cases, adjustments can be made from any position.

  • Affords users easy, precise spring balance adjustments
  • Guaranteed spring-balance performance
  • Safe performance
  • Eliminates labor-intensive steps


  • EZ one-nut adjustment
  • Wide range of motion
  • Fully adjustable upward/downward travel stops
  • Integral spring containment safety feature
  • No special tools required
  • Available in right-hand and left-hand configurations
  • Available with optional automatic engaging lockdown
  • 5-year warranty


truck loading arms

(1) Place 5/8? socket wrench on worm gear hex drive (Under high load conditions, it may be necessary to raise loading arm to 45 degrees above horizontal).

truck loading arms

(2) Turn worm gear hex drive...which...
(3) ...turns gear... which...
(4) ...winds or unwinds spring.

truck loading arms

(5) Winding action produces the necessary torque (lifting action) required to counterbalance the loading arm.

Katie Kelly
Bryce Jordan 4 Years experience
Dana Brogdon 8 Years experience
Claudia Coulter 4 Years experience
Phyllis Sikes 22 Years experience
Kim Anderson 4 Years experience
866-761-7225 USA Toll Free
803-774-7225 Canada
Tired of customer no service?

Call us. You'll speak to a knowledgeable customer service rep immediately. No automated call centers, no telemarketers, just fast service, with decades of experience.

Question? Contact.
Complete this form and an experienced
rep will contact you immediately.
Leave this field empty
  • Loading Arms

    Good brand...

    Good brand, good technology, good warranty, with a better price and lead time.

    Jorge Bryan
    Gold Services Inc.

  • Swivel joints, couplers

    Always a pleasure!

    Our coupler is durable and delivered on time and Phyllis Sikes is always a pleasure to work with.

    Chris Sholten
    Associated Northwest

  • Kamvalok Couplers, adapters

    It's a quality product.

    I deal with Phyllis Sikes... She's always pleasant and very responsive, she called right back after checking stock with the factory. Your couplers are very high quality and they're always in stock. It arrived within 5 days of time ordered.

    Chris Sholten
    Associated Northwest

  • Loading Arms

    Best one on the market...

    Scott was very responsive and helpful along with Phyllis in getting everything taken care of. We like the ease of operation, the different swivel directions and the different styles of load arms. I think this product is the best one on the market today for ease of operation and functionality.

    Austin Schindler
    Strobel Starostka Construction

  • loading arms

    I have found inner peace

    Delivery - one week ahead of schedule! Stephen Todd was responsive and asked all the right questions. We like the quality - as it's proven here at the plant.

    Tim Daly
    Chemical Specialties

  • loading arms swing arms tank car loading rack

    I wouldn't hesitate to contact SafeRack

    I wouldn't hesitate to contact SafeRack again for future projects of this nature. My experience during project with sales and installation were all positive. Sales staff friendly and patient with scope questions/changes. Looking forward to putting new dock with loading arm into service.

    Jerry Choate
    Murphy Oil USA

Contact Us Toll Free USA 866-761-7225 CAN 803-774-7225

Submit Form to Download Catalog
Leave this field empty
Leave this field empty
Leave this field empty
Leave this field empty

© 2014 SafeRack.com | Privacy Policy | Sitemap

SafeRack, ErectaStep, RollAStep, LiquidTransferGroup, YellowGate and their respective logos are a reregistered trademarks of Six Axis LLC.

Contact USA 866-761-7225 Canada 803-774-7225