Emco Wheaton E2121
- Home
- Loading Arms & Couplings
- Emco Wheaton Loading Arms
- Emco Wheaton E2121

The A-Frame Bottom Loader is specifically designed for efficient bottom loading and unloading operations on both sides of a loading platform. Its versatile design allows adjacent arm crossover capability, making it an ideal solution for facilities that require flexible loading configurations and maximum operational efficiency.

SafeRack supplies Emco Wheaton swivel joints, providing expert support to help you choose 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, all in one place.
Emco Wheaton E2121
Overview
Designed primarily for short-range truck loading applications, the A-Frame configuration offers excellent maneuverability while maintaining a compact parking footprint. Thanks to its extended range of motion, the arm stores in a near-vertical position, making it particularly suitable for terminals with limited parking space.
The loading arm is available with either a rigid pipe drop or flexible hose connection, allowing customization based on product requirements and operational preferences. Equipped with D2000 World Series swivel joints and a precision spring-cylinder balancing system, the A-Frame Bottom Loader delivers smooth handling, low maintenance requirements, and long-term reliability.
Key Features
- Designed for bottom loading and unloading of tank trucks and railcars.
- Capable of servicing both sides of a loading platform.
- Adjacent arm crossover design improves loading flexibility.
- Available with rigid pipe or flexible hose drop configurations.
- Compact parking profile with near-vertical storage position.
- E2121 World Series swivel joints provide ultra-low maintenance operation. Spring-cylinder balancing system ensures smooth and effortless handling.
- Suitable for gasoline, diesel, LPG, NGL, propylene, and chemical products.
- Long reach capability for improved loading access and efficiency.
- Optional high-pressure configurations available for LPG and gas transfer applications.
E2121 A-Frame Bottom Loader Specifications
| Specification | Details |
|---|---|
| Product Type | A-Frame Bottom Loading Arm |
| Available Sizes | 2″, 3″, 4″, and 6″ configurations available |
| Working Pressure | Typical operating pressure: 150 psi; high-pressure versions available up to 580 psi (40 bar) |
| Test Pressure | Determined by flange rating, pressure class, and project specifications |
| Temperature Range | Typical range: 5°F to 140°F (-15°C to 60°C); low-temperature designs available |
| Design Type | A-Frame articulated bottom loading arm with rigid pipe or hose drop |
| Construction | Multi-swivel articulated loading arm with spring-cylinder balancing |
| Compliance | Designed to meet industry loading terminal requirements and customer specifications |
| Maintenance | Low-maintenance design utilizing D2000 World Series swivel joints and replaceable sealing components |
| Application Industries | Oil & Gas, Fuel Distribution, LPG Transfer, Petrochemical, Chemical Processing, Bulk Liquid Terminals, Rail & Truck Loading Facilities |
Materials of construction
| Component | Material |
|---|---|
| Flange Options | Carbon Steel, Stainless Steel, Aluminum, and High-Pressure Flange Configurations |
| Bearing Module | Heavy-Duty Swivel Joint Assembly with Precision Bearing System (D2000 World Series available on E2121 high-pressure configuration) |
| Seal Options | Viton Grade A, Buna-N (Nitrile), GFLT, PTFE, UHMWPE Teflon |
Source: Emco Wheaton E2121 data sheet
Source: Emco Wheaton A Frame Bottom Loader catalog
E2121 Frequently Asked Questions
An A-Frame Bottom Loader is a bottom-loading arm designed to service both sides of a loading rack while providing a compact storage position and efficient product transfer.
The system is suitable for gasoline, diesel, LPG, anhydrous ammonia, NGL, propylene, and various industrial liquid products.
Yes. The secondary drop arm can be configured with either a rigid pipe connection or a flexible hose assembly depending on the application requirements.
The A-Frame configuration offers excellent reach, crossover capability, and a narrow parking profile, making it ideal for terminals with space constraints.
Yes. Specialized configurations are available for high-pressure liquid and gas transfer applications, including LPG, anhydrous ammonia, NGL, and propylene service.
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








