Every pressure reducing station requires a heat source to preheat the gas. This is often a central-heating type boiler or heating using electricity, oil or steam. A shell and tube heat exchanger will then transfer the heat to the gas. As the gas is under high pressure and flammable, strict safety standards apply. Pressure reducing stations must therefore be able to operate independently, requiring a complex measure, monitor and control circuit. What are we able to contribute to the pressure reducing stations?