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Reliable Railway Couplings and coupler systems

TODO offers a comprehensive range of railway couplings, locomotive couplings, and rail-car transfer accessories, with each coupler model designed for safe and efficient loading and unloading operations across different rail vehicles. Whether it’s train refueling, rail tanker loading, or integration with train coupling systems, operators worldwide recognize TODO as a leading solution for controlled, spill-free transfer of liquids and gases, based on a Dry Break approach to connections.

Our railway coupling range is TÜV-certified for use within the German rail industry, trusted by rail operators, OEMs, and maintenance teams, and specified by coupler type, Class, and gauge. Every coupling and coupler is manufactured from high-grade materials to ensure durability, chemical resistance, and consistent performance across a wide range of applications—from potable water to aggressive media such as hydrochloric acid. Selecting the right coupler depends on the tank car type, hose size, pipe layout, valve arrangement, and the gauge and Class requirements on the rail network; the same coupler can also be supplied in a different model based on operating pressure, media, and the need for Dry Break performance.

todo railway couplings installation
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Discover Advanced Rail Fueling Solutions – Exclusive Webinar Access

Watch as our Global Product Manager provides detailed product specifications and demonstrates how TODO railway coupling solutions streamline rail tanker loading, train refueling, and general rail‑car operations.

Key advantages by coupler type

Faster service and maintenance; Reduced pressure drop; Lightweight design; Near-zero spillage; Improved control of valve closure and easier hose handling.

This advanced railway coupling solution and coupler model improves operational efficiency in rail-car loading, train refueling, and train coupling systems for freight wagons, passenger vehicles, and mixed stock. On sites handling different vehicles and gauges, a consistent coupler model and type simplifies training and driver procedures, and supports standard operation across freight and passenger stock.

All TODO railway couplings and coupler types comply with major industry standards, based on application Class and gauge:

Pressure Equipment Directive (PED) 2014/68/EU; ATEX Directive 2014/34/EU; ADR/RID regulations for dangerous goods transport; NATO STANAG 3756 for cross-compatibility; Options include electrical control lines where specified. In addition to standards compliance, many buyers compare Price by coupler type, model, and Class, and check what is included in the supply (adapter options, hose assemblies, electrical connections, and spares) to match their rail stock and control requirements.

todo railway couplings installation
TODO Rail-car Certifications

TODO-MATIC coupler model: Proven Railway Dry Break Coupling

The TODO-MATIC railway coupling is one of the most widely used coupler models for locomotive dry break coupling solutions in the industry, including steam-era legacy upgrades and modern engine depots.

Working pressure: up to 25 bar; Sizes: 1” to 6” (2” and 3” most common for rail); Materials: aluminium, brass, stainless steel; Typical interfaces: hose or pipe; Control: defined open/closed handle position with internal valve shut-off.

This dry break railway coupling and coupler design ensures zero leakage during connection and disconnection, making it ideal for train coupling operations involving hazardous media, freight stock, and passenger vehicles. In practice, operators specify coupler type and model based on Class, gauge, and stock, plus the required brake control lines; this keeps connections closed when you open or close the handle and supports safer operation on mixed vehicles.

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TODO-MATIC 2"" 4WD Hose Unit Threaded

TODO-GAS Dry Break Tank Unit for LPG Rail Transfer

The TODO-GAS locomotive coupling solution is a dedicated coupler type specifically designed for LPG transfer in rail applications, based on controlled valve operation and secure connections.

Handles both liquid and vapor phases; Sizes available: 1” and 3”; Stainless steel construction for durability; Suitable for rail vehicles ranging from freight wagons to passenger service units.

With robust sealing (90 Shore O-rings), this railway coupling system and coupler model delivers reliable performance in high-pressure and corrosive environments, including steam-related service media where applicable. For LPG and similar media, the coupler is often paired with an adapter, dedicated hose and pipe routing, and defined electrical control connections where required; the chosen model is based on the tank design, local Class rules, and the brake and control systems on the rail stock.

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TODO-GAS 1 Inch Slang en Tank Eenheid

Safety Pressure Tight Caps (PTCs) for coupler protection

Safety Pressure Tight Caps are a critical part of safe railway coupling systems and coupler protection, helping control residual pressure at the interface.

Air-tested at 25 bar; Provide a third point of closure; Visual safety indicator via red O-ring; Keeps the coupler interface closed when open access is required for inspection.

PTCs are fully compatible with all TODO train and locomotive couplings and coupler models, ensuring additional protection during rail tanker loading and refueling operations across different gauges and Class requirements. Before and after coupling, basic cleaning of the sealing faces and checking the valve and handle travel helps maintain Dry Break performance; where an air test is used, confirm pressure, brake control lines isolation, and that the coupler is fully closed.

 

 

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Pressure Tight Caps 2 Inch

TODO II Tank Units: Next-Generation Railway Couplings

The TODO II railway coupling is a new coupler model that represents the next evolution in locomotive dry break technology and will gradually replace the TODO-MATIC range, based on serviceability and control needs.

 

 

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TODO II Tank Couplers

FAQs | Railway Couplings

A railway coupling and coupler system is used to safely transfer liquids and gases during rail tanker loading and train refueling operations, based on secure connections and control of the valve.

Our Railway Couplings & Accessories