Gauge glass valves are used to visually inspect the liquid level in steam boilers and pressure vessels. They're extremely handy instruments for measuring and tracking the liquid level in boilers. Tube and plate water gauges are the most common types of water gauges. The tubes are comprised of toughened borosilicate round glass tubes that can endure up to 34 bar of pressure. Ablaze Glass Works is one of the excellent as well as well-known glass valve manufacturers in India.