Excel Loading Systems BT-377
- Home
- Loading Arms & Couplings
- Excel Loading Arm Systems
- Excel Loading Systems BT-377

The Excel Loading Systems BT-377 is a low-profile bottom transfer loading arm designed for flexible loading and unloading operations where extended reach is required. It is engineered for situations where vehicles cannot always be accurately positioned, ensuring smooth and safe product transfer in industrial environments.

SafeRack supplies Excel Loading Systems BT-377, 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 BT-377, all in one place.
Excel Loading Systems BT-377
Overview
The Excel Loading Systems BT-377 is built for applications where lateral space is available but overhead support is not. Its primary arm and boom sections extend outward into the loading area in an accordion-style movement, allowing operators to reach trucks from different angles.
The BT-377 is commonly used in single-product loading and unloading operations where flexibility and low mounting height are essential. It supports both truck-side and rear-side access, making it highly versatile for terminal operations.
Key Features
- Low-profile bottom transfer loading arm design
- No overhead structure required for installation
- Accordion-style extension for extended reach
- Suitable for inaccurate vehicle positioning
- Flexible side and rear truck access capability
- Available in right-hand and left-hand configurations
- Up-feed, down-feed, and horizontal-feed options
- Can be mounted in tandem for LPG applications
- Simple installation and operation
- Heavy-duty industrial coating for durability
- Suitable for petroleum and industrial terminals
Excel Loading Systems BT-377 Specifications
| Specification | Detail |
|---|---|
| Model | BT-377 |
| Type | Bottom Transfer Loading Arm |
| Available Sizes | 2″, 3″, 4″, 6″ |
| Configurations | Right Hand / Left Hand / Up Feed / Down Feed / Horizontal Feed |
| Mounting Position | Low-profile ground-level installation |
| Movement Style | Accordion-style extension |
| Support Requirement | No overhead support required |
| Drop Section | Hose or Rigid Pipe |
| Application Standard | API RP 1004 compliant envelope |
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 Industrial Paint System |
Source: Excel Loading Systems BT-377
Source: BT-377
BT-377 Frequently Asked Questions
The Excel Loading Systems BT-377 is used for bottom loading and unloading of tank trucks in industrial and petroleum terminals. It is designed for applications where extended reach and flexible movement are required to safely connect with vehicles that may not always be accurately positioned.
No, the BT-377 is specifically designed as a low-profile loading arm system that does not require any overhead support structure. It is typically installed close to ground level, making it suitable for facilities where vertical installation space is limited or unavailable.
Yes, the BT-377 is designed with flexible movement that allows operators to access trucks from both side and rear positions. Its accordion-style extension helps in reaching connection points even when vehicle alignment is not precise, improving loading efficiency and safety.
The BT-377 is widely used in petroleum terminals, LPG facilities, chemical plants, and industrial loading stations. It is suitable for both loading and unloading operations where safe product transfer and operational flexibility are important.
Yes, multiple BT-377 arms can be installed together, and in some cases, two arms are mounted in tandem on a single post. This configuration is commonly used in LPG and vapor recovery applications where separate product and vapor handling arms are required.
Related Products
Emco Wheaton J0451 — Fuel Line Coupler
Emco Wheaton J0451 / J0452 — API Bottom Loading Couplers (previous generation)
Emco Wheaton J0451 — Fuel Line Coupler
Emco Wheaton J0451 / J0452 — API Bottom Loading Couplers (previous generation)
Emco Wheaton E2112 — Variable Reach Loader
Emco Wheaton E2112 — Variable Reach Loader (US / StandardLine) / E2806/E2807/E2814/E2815 (EU)
Emco Wheaton E2121 — A-Frame Bottom Loader
Emco Wheaton E2121 — High-Pressure A-Frame Loader (LPG / Anhydrous Ammonia)
Emco Wheaton E2123 — Bottom Transfer Loading Arms
Emco Wheaton E2123 — MYR Linkage A-Frame Loader
Emco Wheaton E2630 — Top Loading Arm
Emco Wheaton E2630 — Top Loading Arm with Vapor Recovery (long reach, European / international)
Emco Wheaton J0453 — Tank Truck Couplings
Emco Wheaton J0453 — API Bottom Loading Coupler (current flagship)
Emco Wheaton E2632 — Parallel Loading Arm with Vapor Recovery
Emco Wheaton E2632 — Parallel Loading Arm with Vapor Recovery
Emco Wheaton E2033 — Bottom Transfer Loading Arm
Emco Wheaton E2033 — Bottom Transfer Loading Arm (US) / E2824, E2839 (EU)
Emco Wheaton E2033 — Bottom Transfer Loading Arm
Emco Wheaton E2033 — Bottom Transfer Loading Arm (US) / E2824, E2839 (EU)
G-32-F Unsupported Boom-Type Bottom Loader
OPW Bottom Loading Arm
Emco Wheaton E2304 — Bottom Hose Loading Arm
Emco Wheaton E2304 — Bottom Hose Loading Arm (Spring Cylinder, StandardLine)
Emco Wheaton D2000 Swivel Joint
Multifunctional Swivel Joint (World Series, standard across loading arms)
Excel Loading Arm Systems & Components
SafeRack is North America’s largest distributor of Excel loading arm systems & components
OPW Loading Arms
SafeRack is North America’s largest distributor of OPW Engineered Systems loading arms
Emco Wheaton loading arms
SafeRack is North America’s largest distributor of Emco Wheaton loading arms








