LYNX Series Bottom-Loading Coupler
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The OPW LYNX API Bottom Loading Coupler is engineered to deliver safe, reliable, and efficient bottom-loading operations for fuel terminals, bulk plants, and transport loading facilities. Designed to meet industry API standards, this advanced coupler helps minimize product loss, improve operator safety, and simplify maintenance while providing dependable performance in demanding loading applications.

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LYNX Series Bottom-Loading Coupler
Overview
The OPW LYNX API Bottom Loading Coupler is a next-generation dry-break loading solution designed for petroleum and liquid transfer operations. Built with a durable stainless-steel collar and hard-anodized aluminum body, the coupler provides long service life while maintaining secure connections during loading operations. Its innovative U-pin design allows quick field maintenance without special tools, helping reduce downtime and improve operational efficiency. The LYNX coupler features automatic latching and true interlocking mechanisms that help ensure secure engagement with API adapters, reducing the risk of spills and enhancing workplace safety. Designed for compatibility with standard 4-inch API bottom-loading adapters, it is suitable for a wide range of terminal and transport applications.
Key Features
- Compatible with industry-standard 4-inch API bottom-loading adapters
- Automatic latching mechanism for secure connections
- Four stainless-steel interlocking latches for enhanced safety
- Durable stainless-steel collar construction
- Hard-anodized aluminum body for extended service life
- Quick U-pin disassembly design for simplified maintenance
- Fast replacement of main seals without specialized tools
- Low product leakage during disconnect operations
- Ergonomic handle and carry loop for easier operation
- Available with short or long operating handles
- Multiple seal options available for different products and environments
- Designed to reduce maintenance time and operational downtime
- 5-year manufacturer warranty available on applicable models
- Supports high-pressure surge conditions while maintaining secure connections
LYNX Bottom Loading Coupler Specifications
| Specification | Details |
|---|---|
| Product Type | API Bottom Loading Coupler |
| Design Standard | API RP 1004, AS5602 |
| Handle Options | Short 5.9 in. (150 mm) or Long 7.8 in. (200 mm) |
| Working Pressure | 80 psi (5.5 bar) |
| Test Pressure | 119 psi (8.2 bar) |
| Design Pressure | 363 psi (25 bar) |
| Maximum Surge Pressure | 493 psi (34 bar) |
| Mounting | 4-inch TTMA Flange |
| Weight | 19 lbs. (8.6 kg) |
| Dismantling Method | Single U-pin Removal |
| Seal Options | Fluorocarbon, Nitrile/Buna, Fluorosilicone, FFKM, Ultra Low-Temp FKM |
| Application | Petroleum and Liquid Transfer Loading Operations |
Materials of construction
| Component | Material |
|---|---|
| Coupler Body | Hard-Anodized Aluminum |
| Collar | Stainless Steel |
| Interlocking Latches | Stainless Steel |
| Operating Handle | Heavy-Duty Metal Construction |
| Main Seals | Fluorocarbon, Nitrile/Buna, Fluorosilicone, FFKM, or Ultra Low-Temp FKM |
| Fasteners & Internal Components | Fasteners & Internal Components |
Sourse: LYNX Coupler Data Sheet
LYNX Bottom Loading Coupler Frequently Asked Questions
The coupler is used to create a secure connection between loading arms and tank truck adapters during bottom-loading operations for petroleum and liquid products.
Yes. The coupler is designed in accordance with API RP 1004 standards for bottom-loading and vapor recovery applications.
The coupler is available with a short 5.9-inch handle or a long 7.8-inch handle to accommodate operator preferences and loading requirements.
The U-pin design allows operators to quickly disassemble the coupler and replace seals without special tools, reducing service time and downtime.
Seal options include Fluorocarbon, Nitrile/Buna, Fluorosilicone, FFKM, and Ultra Low-Temperature FKM materials for various product compatibility requirements.
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