API Dry-Break Coupling
API dry couplings are mainly used in the bottom closed loading and unloading system for gasoline and diesel, specifically between the swan neck pipe and the fuel tanker.
API dry couplings feature a lightweight, portable, and quick connection, equipped with an automatic locking function.
They ensure no leakage during connection and disconnection, making them an important piece of equipment for vapor recovery. The design, production, and testing comply with the API RP1004 standard requirements.
They are interchangeable with equivalent brands (OPW / EMCO).
- Product Introduction
Product Overview
The API Dry-Break Coupling is a precision-engineered fluid connection device designed for the safe, rapid, and leak-free transfer of fuels and chemicals during bottom loading operations. Fully compliant with API RP 1004 standards, this coupling ensures environmental safety and operational efficiency in demanding industrial settings.
Core Function: Enables rapid connection and disconnection between loading arms and tanker trucks/railcars with zero spillage.
Interchangeability: Designed for full dimensional interchangeability with major international brands such as OPW, EMCO.
Operating Principle
The coupling features a dual shut-off valve design that ensures a dry disconnect every time:
Connection: When the adapter (male) is inserted into the coupler (female), the cam-and-lever mechanism simultaneously opens both valves, allowing fluid flow.
Disconnection: Upon release of the handle, the internal springs force both valves to close instantly and automatically, trapping the fluid within the system and preventing any leakage to the atmosphere.
Technical Specifications
| Parameter | Specification |
|---|---|
| Standard Compliance | API RP 1004 / European Standards |
| Max. Working Pressure | 5.5 bar (80 psi) |
| Proof Pressure | 8.2 bar (119 psi) |
| Connection Interface | 4" TTMA Flange |
| Body Material | Aluminum Alloy with Hard Anodized Coating |
| Seal Materials | FKM or EPDM |
| Compatible Media | Gasoline, Diesel, Jet Fuel, Methanol, Ethanol, and Petrochemicals |
Key Features & Benefits
Zero Emission Design: The dry-break mechanism eliminates dripping and spillage during connection and disconnection, ensuring compliance with strict environmental regulations (VOC control).
Safety Interlock: Equipped with a mechanical locking device that prevents accidental opening while the valve is in the open position, ensuring operator safety.
Lightweight & Durable: Constructed from high-strength aluminum alloy with a hard anodized finish, providing superior corrosion resistance and reduced weight for easier handling.
Low Maintenance: Simple, robust design with fewer internal parts allows for easy maintenance and long service life.
Petroleum Terminals
Bottom loading of gasoline, diesel, and jet fuel.
Loading and unloading of tanker trucks and railcars.
Chemical Processing
Transfer of methanol, ethanol, and other aggressive chemicals (with appropriate seal selection).
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