Connector solutions suitable for railways [Fluid Connectors]

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Stobri fluid connector railway

last updated：Sep 17, 2025

ストーブリ

Stobri has expertise in railway solutions, possessing unique specialized technology and a wide range of capabilities aimed at the global railway market.

The cooling water lines for onboard electronic devices, the connections between the vehicle body and bogie, as well as between vehicles, hydraulic circuits, brake systems, and fluid and electrical applications such as batteries and converters require high reliability. High-quality connection solutions: ● Minimal flow resistance, preventing connection errors and leaks in all vehicle systems ● Multi-lam contact technology ensures long-term current flow and guarantees low and stable electrical resistance ● Ease of use: Compact space-saving design, automatic connection, and easy handling ● Robustness: Strong locking mechanism, long lifespan, and high corrosion resistance ● Quick maintenance: Manufacturers benefit from reduced assembly time, making system maintenance easier for end users ● Infinite possibilities: Modular technology that accommodates diverse connection solutions: customizable to each specification ● Durability and safety in harsh environments: High voltage (up to several kA), heat resistance (up to 360 degrees), durability (capable of one million connect/disconnect cycles), resistance to temperature changes, and strong against vibration and shock.

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basic information

A variety of products specialized for various applications related to railways ● Quick Couplings - For cooling power supply devices and onboard electronic equipment - Various quick couplings for air used in pressure measurement and leveling tests - Connection for compressed air to flange lubricators and brake circuits - Hydraulic quick couplings for tanks, oil drain gearboxes, and axles - Quick couplings for brake calipers, accumulators, and hydraulic units ● Multi Couplings - For cooling onboard electronic equipment ● Electrical Connectors - Busbar and fork plug type connectors - Modular electrical connectors for power modules and communication pins - Multi-pole connectors - Ground terminal blocks

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Applications/Examples of results

- Converter/Inverter/Transformer - Body connection part - Motor - Battery pack - Pantograph system - Connection between bodies - Resistor - Drain, filling, level check - Brake, suspension - Connection between body/bogie/motor - Grounding solution - Various other applications, custom solutions for various infrastructures

Detailed information

【RBE】 Quick Coupling for Pressure Measurement and Leveling Measurement The 【RBE】 quick coupling is designed with high performance and safety in mind. Its features include easy operation with a simple push to connect and a button press to disconnect. The use of a protruding button enhances usability. There are three versions available: RBE for pressure measurement, RBE V1 for leveling tests, and RBE V2 which can be used for both. <Application>: Pressure measurement and leveling measurement for railway vehicles <Nominal Diameter DN>: 3mm, 6mm <Maximum Allowable Pressure>: 10bar <Composition>: Mainly stainless steel, brass with plating <Other>: - A protective cover can be used for dust protection - The plug shape complies with ISO6150 standards
【RME】 Quick Coupling for Railway Cooling In vehicle-mounted cooling circuits, 【RME】 offers advantages in airtightness specifically tailored for the railway industry. It is designed so that sealing occurs before the valve opens during connection. The materials used are durable, and corrosion resistance is enhanced in the presence of liquids and coolant additives. Additionally, a protective cover is available to shield the sealing area and locking mechanism from external factors such as water and dust. <Application>: - Cooling circuits for vehicle-mounted electronic devices, engines, inverters, and converters - For filling and draining <Nominal Diameter DN>: 6mm to 25mm <Maximum Allowable Pressure>: 16bar <Composition>: Brass, stainless steel (surface treatment) <Other>: Chloroprene protective cover
【RTD】 Full Flow Coupling for Railways Intense vibrations, frequent acceleration and deceleration, extreme temperatures. Even under these harsh conditions, the 【RTD】 can be used as a quick coupling for compressed air. To achieve this, the sealing parts and the locking mechanism, which is a movable component, are covered with a protective cover, made from high-quality materials, designed for durability, and feature an ergonomic semi-automatic locking system for ease of handling. The connection guide on the plug side is set longer to ensure secure attachment and detachment, while also maintaining sealing performance against the effects of vibration. <Application>: Connection of compressed air between the body and the bogie, and between vehicles. <Nominal Diameter DN>: 11mm, 19mm <Maximum Allowable Pressure>: 10bar <Composition>: Mainly stainless steel, with a protective cover on the socket side. <Other>: Can be used in combination with metal hoses or flexible hoses.
【SPI】 Clean Break Coupling for Railways The 【SPI】 is a non-spill coupling featuring a flat face design, which eliminates liquid drips during connection and disconnection, preventing foreign matter from entering the circuit. The guide section for the plug connection is set longer, ensuring reliable connections even under harsh conditions. The ball lock mechanism allows for easy, quick, and secure locking, and is resistant to harsh conditions such as vibrations and oscillations. <Application> - Hydraulic brake circuits - Hydraulic tilt circuits - Brake calipers - Hydraulic accumulators - Hydraulic units <Nominal Diameter DN>: 3mm to 12mm <Maximum Allowable Pressure>: 160 bar <Materials>: Mainly stainless steel, brass with plating <Additional Information>: Can be used in combination with metal hoses or flexible hoses.
【SPT/CG】 Non-spill coupling for railway cooling It features a non-spill structure with a flat face design. Therefore, there is no air entrapment in the circuit during connection, and there is no liquid dripping during disconnection. It is made of aluminum alloy with surface treatment, providing sufficient strength while being lightweight. The internal structure is optimized for flow paths while keeping the overall size as compact as possible, resulting in reduced pressure loss. Emphasizing safety and reliability, it has a robust locking mechanism. <Application>: - Cooling circuits for onboard electronic devices, engines, inverters/converters - For filling and draining <Nominal Diameter DN>: 5mm to 25mm <Maximum Allowable Pressure>: 40bar <Composition>: Aluminum alloy (surface treated) <Others>: A pressure relief valve can be optionally added to the socket or plug. This protects the circuit when residual heat causes the pressure in the circuit to continue rising.
【SPI/OS】 Full flow coupling designed for use in harsh environments It excels in impact resistance, and its performance is not compromised even under the most severe conditions. The sealing and locking parts are completely covered, further enhancing safety. The locking mechanism sleeve is ergonomically designed for ease of use, allowing for a secure grip even while wearing work gloves. It can be used for pneumatic applications between the body and bogie, as well as between vehicles, and can be safely used in physically harsh environments such as acceleration, vibration, and low temperatures. <Application>: - Compressed air applications in the railway industry - Pneumatic applications between the body and bogie, and between vehicles <Nominal Diameter DN>: 6mm, 9mm <Maximum Allowable Pressure>: 10bar <Composition>: Mainly stainless steel, with rubber cover on the socket <Other>: Can be used in combination with metal hoses or flexible hoses.
【GPL】 Full Flow Coupling for Compressed Air in Railways The coupling specialized for railways【GLP】 has a sealing part and a locking mechanism that is covered by a protective cover, and it features a robust structure that can withstand impacts, making it ideal for use in railways. With an ergonomic sleeve mechanism and a simple push-to-connect design, it is user-friendly even in hard-to-reach places. <Application>: Connection of compressed air between the vehicle body and the bogie, and between vehicles. <Nominal Diameter DN>: 15mm to 33mm <Maximum Allowable Pressure>: 10bar <Composition>: High-resistance stainless steel, plated brass, with a protective cover on the socket side. <Other>: Can be used in combination with metal hoses or flexible hoses.