OPW Engineered Systems 1004D4 — API Bottom Loading Coupler (current generation)
The 1004D4 API Bottom Loading Coupler is engineered to provide safe, reliable, and efficient connections during petroleum and liquid transfer operations. Featuring a next-generation design with advanced sealing technology, dual interlocks, and a spring-loaded sleeve mechanism, this coupler helps improve loading performance while simplifying maintenance. Its rugged construction and operator-friendly features make it an ideal solution for demanding terminal and transport loading applications.
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OPW Engineered Systems 1004D4 — API Bottom Loading Coupler (current generation)
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OPW Engineered Systems 1004D4 — API Bottom Loading Coupler (current generation)
Overview
Designed to meet the needs of modern fuel loading facilities, the 1004D4 API Bottom Loading Coupler combines durability, safety, and ease of operation in a compact package. The innovative 5-cam design provides secure alignment with API adapters while improving resistance to side loads encountered during loading operations. A unique spring-loaded sleeve automatically engages the API truck adapter, helping operators achieve quick and secure connections. Dual interlock mechanisms ensure the coupler cannot open unless it is properly connected, enhancing operational safety and reducing the risk of spills. The smart-seal system incorporates dual high-performance O-rings to deliver dependable sealing performance across a wide range of fuels and liquid products. Maintenance is simplified through a service-friendly design that allows seal replacement and component access without removing the coupler from the loading rack.
Key Features
- Advanced 5-cam design for secure adapter engagement
- Easy alignment during connection and operation
- Excellent side-load resistance during loading
- Dual interlock system enhances operational safety
- Prevents opening unless properly connected to an API adapter
- Spring-loaded sleeve automatically engages the truck adapter
- Smart-seal design with dual high-performance O-rings
- Compatible with gasoline, diesel, biodiesel, and ethanol
- Stainless steel ergonomic handle for smooth operation
- Quick access to internal components for maintenance
- Nose seal can be replaced without removing the coupler
- No special tools required for servicing
- Fast rebuild process minimizes downtime
- Durable aluminum and stainless steel construction
1004D4 API Bottom Loading Specifications
| Specification | Details |
|---|---|
| Product Type | API Bottom Loading Coupler |
| Model | 1004D4 |
| Maximum Design Pressure | 125 psi (8.6 bar) |
| Maximum Working Pressure | 75 psi (5 bar) |
| Maximum Flow Rate | 600 GPM (135 m³/h) |
| Pressure Drop at Maximum Flow | 2–5 psi (0.24 bar) |
| Weight | 18.5 lbs (8.39 kg) |
| Connection Type | API Bottom Loading |
| Operating Handle | Stainless Steel Ergonomic Handle |
| Interlock System | Dual Interlocks |
| Sealing System | Dual O-Ring Smart-Seal Design |
Materials of construction
| Component | Material |
|---|---|
| Body | ASTM B26 Anodized Aluminum A356-T6 |
| Sleeve | ASTM B26 Anodized Aluminum A356-T6 |
| Poppet | ASTM B26 Anodized Aluminum A356-T6 |
| Cam | ASTM A351 CF8M (316 Stainless Steel) |
| Cylinder | ASTM SB241 Aluminum 6061-T6 |
| Shaft | ASTM A564 13-8 Condition RH950 Stainless Steel |
| Clevis Pin | ASTM SA564 17-4 PH Stainless Steel (H900 Hardened) |
| Seals | Application-Specific Elastomers |
Source: 1004D4 API Bottom Loading Coupler Flyer
1004D4 API Bottom Loading Frequently Asked Questions
The 1004D4 API Bottom Loading Coupler is used to connect loading arms to API adapters on tank trucks during petroleum and liquid transfer operations.
The 5-cam design improves alignment, creates tighter adapter connections, and provides greater resistance to side loads during loading.
The dual interlock system prevents the coupler from opening unless it is properly connected to an API adapter, helping reduce spills and accidental disconnections.
The coupler is compatible with gasoline, diesel, biodiesel, ethanol, and many other liquid transfer applications when the appropriate seal material is select.
No. The coupler is designe for quick servicing, allowing seal replacement and component access without removing the coupler from the loading rack or using special tools.
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