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No 1 for fuel filling spill prevention

Used as standard on most fleets in the UK rail industry our filling valves (Flyte valves) and dry break couplings provide a complete safety and environmental solution to fluid tank filling requirements.

Help with obsolescence

Having a problem with spares supply and quality of another manufacturers old brass coupling design, our customer used our engineering resources to design and build a reliable, lower cost and lighter weight direct fit replacement to keep their trains running for longer.

Refurb options preventing waste

Intentionally designed to be broken down into a number of maintainable components, AMS have provided factory refurbishment plans or spares parts supply to valves that have been in use for over 15 years

For more information call +44 (0)1726 839 909 or

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Our Mechanical Flyte Valves and Dry Break Couplings

Dry Break Coupling

Designed to fit either directly to our filling valves, or to a flange on a tank or pipe, the coupling provides a dry break to prevent leakage from the filling hose when disconnecting from a storage tank.

Different flange connections allow replacement of historic brass couplings, with improved reliability, significant weight reductions and better value.

The flexibility of the design allows us to supply with alternative threaded connections to suit hose couplings for a range of applications, with additional mounting options also available to suit any existing flange connections.

Filling Valves

Also known as the Flyte valve, the AMS vessel mounted filling control valves are a range of mechanical, float operated servo valves designed to limit the amount of liquid fed into a tank to a specific level.

Designed to allow easy self maintenance and increase the product lifespan, AMS have provided spares and factory refurbishment plans for valves that have been in service for over 20 years.

The flexible design includes adjustable arm height and length to shut off at different points, arms shaped to allow fitting to the top, side or bottom of a vessel, non return valves and pneumatic operation of remote valves.

  • UK rail industry approved
  • Low ownership cost, self maintenance
  • Directly replaces old rail brass half couplings
  • Flexible options for wide range of filling applications
  • Simple operation
  • Factory refurbishment plans available 

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Train level measurement, gauges and indicators

To solve a specific problem with access and the lack of height between a fuel tank and the trains body, AMS have modified the head of our approved level sensors to allow fitting in confined spaces. This development also removed the need for the transmitter to be located in a separate box on the side of the tank and allowed the sensor to be wired directly to the indicators, saving significant additional costs in materials and wiring time.

Train level measurement and control

Advances in the way instrumentation can be powered due to processing capabilities at reduced power levels, combined with the ever-continuing miniaturisation of electronics capability, has created the opportunity for rail companies to consider more modern electronic/digital technology as an alternative to the traditional methods for level measurement.

RCV 2 Inspection

Related Documents

Refuelling Control Valve and Dry Break Coupling

The Refuelling Control Valve is a float operated servo valve, designed to limit the amount of liquid fed into a tank to a specific level.The coupling prevents fuel leakage when fuelling a locomotive and automatically closes when the fuelling hose coupling is removed. 

The AMS Process

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  • Submit a quotation 
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  • Arrange for a site visit to view your application

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