What is the primary function of a siphon tube in pressure control systems?

The primary function of a siphon tube in pressure control systems is to prevent hot steam from directly contacting sensitive components, such as pressure gauges. When steam passes through a siphon tube, it cools down before reaching these components, protecting them from high temperatures that could lead to inaccurate readings or damage. This cooling effect is crucial for maintaining the integrity and reliability of the pressure control system. By ensuring that sensitive instruments are shielded from the heat of steam, the siphon tube plays a vital role in the proper functioning and longevity of the equipment.