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Variable Reach Top Loading Arm | Top Loading Arms | Model 621-BC/721-BC

Variable Reach Top Loading Arm

The variable reach top loading arm (Model 621-BC/721-BC) is the ideal solution for top filling of road tankers. Due to its variable reach, this allows for multiple tanker compartments to be filled without the need to reposition the truck each time. The model 621-BC is used for high use/volume with the model 721-BC being used for low use/volume.

The design of the variable reach top loading arm consists of four swivel joints for horizontal and vertical positioning, a compression spring balance cylinder to help with the movement of the arm, a loading valve with either hold-open or stay-open operation and an extension/remote control for outboard loading valve operation. Additionally, a vacuum breaker is also included to allow for fast drainage. This arm is available in left or right hand configuration.

This is manufactured to ATEX/PED standards.

For more designs, please head to our loading arm page where you can find a range of Loading and Unloading Arms.

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Available Sizes:

3″ / 4″


Aluminium / Carbon Steel / Stainless Steel

Operating Pressure:

Up to 15 Bar

Seal Material:

Nitrile / Viton® / Special Viton®


-15°C / +65°C


Flute beak end

Flow deflector

Micro switch to signal when valve opened or closed

Rotational micro switches to signal when the arm is in use

NDT tests (X-ray)

Alternative designs and specifications for the Model 621-BC/721-BC are available on request

Enquiry details


Oil & Gas, Chemical, Petrochemical, Other


Top Loading Arm




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Drip Buckets, Spring Cylinder