Mechanical Filling Valves

    Including Refuelling Control 'Flyte' Valves & Dry Break Couplings

    Our filling valves and dry break couplings have been used throughout the rail industry for many years both domestically and overseas, they have become the defacto rail industry standard throughout the UK. The Refuelling Control Valve has been utilised in the following applications;

    • Fuel tank level control
    • Chemical or Hydrocarbon storage control
    • Single point filling of multiple tanks.
    • Engine coolant / Anti-Freeze
    • Water and many other fluids
    • When used in conjunction with Dry Break
    • Coupling can be used for spill free tank filling.


    The Refuelling Control Valve is a float operated servo valve, designed to limit the amount of liquid fed into a tank to a precise level. It can be used in a wide range of chemical and hydrocarbon storage applications where emphasis is being placed on careful handling of liquids.

    A special feature of the valve is that it allows the tank to be controlled up to capacity, increasing utilisation and therefore reducing the number of deliveries to static installations. It is widely used in rail applications for both refuelling and coolant control.

    The servo valve provides positive sealing and reliable operation without external power. The float mechanism is used to seal off the servo chamber, via a hole in the valve head; the servo effect closes the valve head against the liquid flow.


    The coupling prevents fuel leakage when fuelling a locomotive and automatically closes when the fuelling hose coupling is removed. It can be supplied as a separate item or combined with the refuelling control valve. This combination provides a higher tank capacity as no other internals are required. Some of the key benefits include:

    • Enables safe maximum filling of rail fuel tanks
    • Automatic shut off of fuel
    • Lightweight robust construction
    • Compatible with standard rail industry hose end coupling
    • Supplied as separate units or combined
    • Environmentally clean operation
    • Servo actuated by fluid pressure
    • Requires no external power source
    • In use since 1956 (proven design)


    In addition to the above we also offer an extensive overhaul facility. Our service exchange program can ensure prompt replacement of RCVs and DBC's during your maintenance scheduling.

    AMS offer repairs on an as required basis. Valves and couplings returned to AMS are evaluated and an assessment report would then indicate the level of repair required to the product.

    AMS offer a number of repair / refurbishment options, these range from basic through to complete.