Bottom Transfer Arm (BL-50)
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The BL-50 Bottom Transfer Arm is designed for flexible and efficient tank truck loading operations. It is built for applications where vehicle positioning may not always be accurate, requiring extended reach and smooth movement for safe product transfer.

SafeRack supplies Excel Loading Systems BL-50, providing expert support to help you select the right configuration, materials, and sealing options for your application. Our team assists with specifications, compatibility, and system integration to ensure safe, efficient, and reliable fluid transfer operations. Get technical guidance, lead times, and pricing support for Excel Loading Systems BL-50, all in one place.
Bottom Transfer Arm (BL-50)
Overview
The BL-50 Bottom Transfer Arm stores its primary arm in a horizontal position on either side of the riser pipe, depending on piping layout and site obstructions. The arm rotates above and below the horizontal plane, allowing operators to easily reach truck connection points during loading operations.
This design requires less overhead clearance compared to A-frame configurations but needs additional side space for storage. The BL-50 supports both hose and rigid pipe drop sections, making it adaptable for different loading requirements.
Key Features
- Horizontal storage bottom loading arm design
- Rotates above and below horizontal for flexible reach
- Suitable for inaccurate vehicle positioning
- Compatible with hose or rigid pipe drop sections
- Right-hand and left-hand configurations available
- Up-feed, down-feed, and horizontal-feed options
- Designed for tight multi-arm installations
- Conforms to API RP 1004 loading envelope
- Simple installation and low maintenance design
- Heavy-duty coating for long service life
- Suitable for petroleum and industrial terminals
Bottom Transfer Arm (BL-50) Specifications
| Specification | Detail |
|---|---|
| Model | BL-50 |
| Type | Bottom Transfer Loading Arm |
| Available Sizes | 2″, 3″, 4″, 6″ |
| Configurations | Right Hand / Left Hand / Up Feed / Down Feed / Horizontal Feed |
| Storage Position | Horizontal (side of riser pipe) |
| Movement | Above and below horizontal rotation |
| Drop Section | Hose or Rigid Pipe |
| Horizontal Spacing | 18″ Centerlines |
| Vertical Spacing | 16″ Centers |
| Application Standard | API RP 1004 |
Materials of construction
| Component | Material |
|---|---|
| Arm Structure | Carbon Steel/Low Temperature Carbon Steel/Aluminum/Stainless Steel |
| Specialty Metals | Alloy 20/Hastelloy C |
| Drop Section | Hose or Rigid Pipe |
| Finish | Heavy Duty Two-Coat Industrial Paint |
Source: BL-50 Bottom Transfer Arm
BL-50 Frequently Asked Questions
The BL-50 is available in carbon steel, low-temperature carbon steel, aluminum, and stainless steel. Specialty materials such as Alloy 20 and Hastelloy C are also available for applications requiring higher chemical resistance or durability.
The Excel Loading Systems BL-50 is used for bottom loading operations of tank trucks in petroleum and industrial terminals. It is designed to handle situations where vehicle positioning is not always precise, allowing operators to maintain safe and efficient product transfer.
The BL-50 stores its primary arm in a horizontal position on either side of the riser pipe. The exact storage side depends on the piping layout and any physical obstructions in the installation area.
The BL-50 is available in multiple configurations including right-hand, left-hand, up-feed, down-feed, and horizontal-feed options. This flexibility allows it to be adapted to different loading bay designs and operational requirements.
Yes, the BL-50 is designed for installations in confined spaces. Multiple arms can be installed using 18-inch horizontal and 16-inch vertical spacing, making it suitable for multi-product loading bays in busy terminals.
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Excel Loading Arm Systems & Components
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